81_FR_46977 81 FR 46839 - Expedited Approval of Alternative Test Procedures for the Analysis of Contaminants Under the Safe Drinking Water Act; Analysis and Sampling Procedures

81 FR 46839 - Expedited Approval of Alternative Test Procedures for the Analysis of Contaminants Under the Safe Drinking Water Act; Analysis and Sampling Procedures

ENVIRONMENTAL PROTECTION AGENCY

Federal Register Volume 81, Issue 138 (July 19, 2016)

Page Range46839-46848
FR Document2016-16516

This action announces the U.S. Environmental Protection Agency's (EPA's) approval of alternative testing methods for use in measuring the levels of contaminants in drinking water and determining compliance with national primary drinking water regulations. The Safe Drinking Water Act authorizes EPA to approve the use of alternative testing methods through publication in the Federal Register. EPA is using this streamlined authority to make 16 additional methods available for analyzing drinking water samples. This expedited approach provides public water systems, laboratories, and primacy agencies with more timely access to new measurement techniques and greater flexibility in the selection of analytical methods, thereby reducing monitoring costs while maintaining public health protection.

Federal Register, Volume 81 Issue 138 (Tuesday, July 19, 2016)
[Federal Register Volume 81, Number 138 (Tuesday, July 19, 2016)]
[Rules and Regulations]
[Pages 46839-46848]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2016-16516]



[[Page 46839]]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 141

[EPA-HQ-OW-2016-0281; FRL-9948-54-OW]


Expedited Approval of Alternative Test Procedures for the 
Analysis of Contaminants Under the Safe Drinking Water Act; Analysis 
and Sampling Procedures

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: This action announces the U.S. Environmental Protection 
Agency's (EPA's) approval of alternative testing methods for use in 
measuring the levels of contaminants in drinking water and determining 
compliance with national primary drinking water regulations. The Safe 
Drinking Water Act authorizes EPA to approve the use of alternative 
testing methods through publication in the Federal Register. EPA is 
using this streamlined authority to make 16 additional methods 
available for analyzing drinking water samples. This expedited approach 
provides public water systems, laboratories, and primacy agencies with 
more timely access to new measurement techniques and greater 
flexibility in the selection of analytical methods, thereby reducing 
monitoring costs while maintaining public health protection.

DATES: This action is effective July 19, 2016.

ADDRESSES: The EPA has established a docket for this action under 
Docket ID No. EPA-HQ-2016-0281. All documents in the docket are listed 
on the http://www.regulations.gov Web site. Although listed in the 
index, some information is not publicly available, e.g., CBI or other 
information whose disclosure is restricted by statute. Certain other 
material, such as copyrighted material, is not placed on the Internet 
and will be publicly available only in hard copy form. Publicly 
available docket materials are available electronically through http://www.regulations.gov.

FOR FURTHER INFORMATION CONTACT: The Safe Drinking Water Hotline (800) 
426-4791 or Glynda Smith, Technical Support Center, Standards and Risk 
Management Division, Office of Ground Water and Drinking Water (MS 
140), Environmental Protection Agency, 26 West Martin Luther King 
Drive, Cincinnati, OH 45268; telephone number: (513) 569-7652; email 
address: [email protected].

SUPPLEMENTARY INFORMATION: 

 I. General Information

A. Does this action apply to me?

    Public water systems are the regulated entities required to measure 
contaminants in drinking water samples. In addition, EPA Regions as 
well as states and tribal governments with authority to administer the 
regulatory program for public water systems under the Safe Drinking 
Water Act (SDWA) may measure contaminants in water samples. When EPA 
sets a monitoring requirement in its national primary drinking water 
regulations for a given contaminant, the Agency also establishes in the 
regulations standardized test procedures for analysis of the 
contaminant. This action makes alternative testing methods available 
for particular drinking water contaminants beyond the testing methods 
currently established in the regulations. EPA is providing public water 
systems required to test water samples with a choice of using either a 
test procedure already established in the existing regulations or an 
alternative test procedure that has been approved in this action or in 
prior expedited approval actions. Categories and entities that may 
ultimately be affected by this action include:

------------------------------------------------------------------------
                                          Examples of
              Category                    potentially        NAICS \1\
                                      regulated entities
------------------------------------------------------------------------
State, local, & tribal governments..  State, local and            924110
                                       tribal
                                       governments that
                                       analyze water
                                       samples on behalf
                                       of public water
                                       systems required
                                       to conduct such
                                       analysis; state,
                                       local and tribal
                                       governments that
                                       directly operate
                                       community and non-
                                       transient non-
                                       community water
                                       systems required
                                       to monitor.
Industry............................  Private operators           221310
                                       of community and
                                       non-transient non-
                                       community water
                                       systems required
                                       to monitor.
Municipalities......................  Municipal                   924110
                                       operators of
                                       community and non-
                                       transient non-
                                       community water
                                       systems required
                                       to monitor.
------------------------------------------------------------------------
\1\ North American Industry Classification System.

    This table is not intended to be exhaustive, but rather provides a 
guide for readers regarding entities likely to be affected by this 
action. This table lists the types of entities that EPA is now aware 
could potentially be affected by this action. Other types of entities 
not listed in the table could also be impacted. To determine whether 
your facility is affected by this action, you should carefully examine 
the applicability language in the Code of Federal Regulations (CFR) at 
40 CFR 141.2 (definition of public water system). If you have questions 
regarding the applicability of this action to a particular entity, 
consult the person listed in the preceding FOR FURTHER INFORMATION 
CONTACT section.

Abbreviations and Acronyms Used in This Action

APHA: American Public Health Association
ATP: Alternate Test Procedure
CFR: Code of Federal Regulations
DPD: N,N-diethyl-p-phenylenediamine
EPA: United States Environmental Protection Agency
LED: Light Emitting Diode
NAICS: North American Industry Classification System
NEMI: National Environmental Methods Index
NTU: Nephelometric Turbidity Unit
QC: Quality Control
SDWA: The Safe Drinking Water Act
TOC: Total Organic Carbon
VCSB: Voluntary Consensus Standard Bodies

II. Background

A. What is the purpose of this action?

    In this action, EPA is approving 16 analytical methods for 
determining contaminant concentrations in drinking water samples 
collected under SDWA. Regulated parties required to sample and monitor 
may use either the testing methods already established in existing 
regulations or the alternative testing methods being approved in this 
action or in prior expedited approval actions. The new methods are 
listed along with other methods similarly approved through previous 
expedited actions in 40 CFR part 141, appendix A to subpart C and on 
EPA's drinking water methods Web site at https://www.epa.gov/dwanalyticalmethods.

[[Page 46840]]

B. What is the basis for this action?

    When EPA determines that an alternative analytical method is 
``equally effective'' (i.e., as effective as a method that has already 
been promulgated in the regulations), SDWA allows EPA to approve the 
use of the alternative method through publication in the Federal 
Register (see Section 1401(1) of SDWA). EPA is using this streamlined 
approval authority to make 16 additional methods available for 
determining contaminant concentrations in drinking water samples 
collected under SDWA. EPA has determined that, for each contaminant or 
group of contaminants listed in Section III, the additional testing 
methods being approved in this action are as effective as one or more 
of the testing methods already approved in the regulations for those 
contaminants. Section 1401(1) of SDWA states that the newly approved 
methods ``shall be treated as an alternative for public water systems 
to the quality control and testing procedures listed in the 
regulation.'' Accordingly, this action makes these additional 16 
analytical methods legally available as options for meeting EPA's 
monitoring requirements.
    This action does not add regulatory language, but does, for 
informational purposes, update an appendix to the regulations at 40 CFR 
part 141 that lists all methods approved under Section 1401(1) of SDWA. 
Accordingly, while this action is not a rule, it is updating CFR text 
and therefore is being published in the ``Final Rules'' section of the 
Federal Register.

III. Summary of Approvals

    EPA is approving 16 methods that are equally effective relative to 
methods previously promulgated in the regulations. By means of this 
rule, these 16 methods are added to appendix A to subpart C of 40 CFR 
part 141.

A. Methods developed by Voluntary Consensus Standard Bodies (VCSB)

    ASTM International. EPA compared the most recent versions of seven 
ASTM International methods to the earlier versions of those methods 
that are currently approved in 40 CFR part 141. Changes between the 
earlier approved version and the most recent version of each method are 
summarized in Smith (2015). The revisions primarily involve editorial 
changes (e.g., updated references, definitions, terminology, procedural 
clarifications, and reorganization of text). The revised methods are 
the same as the approved versions with respect to sample collection and 
handling protocols, sample preparation, analytical methodology, and 
method performance data; thus, EPA finds they are equally effective 
relative to the approved methods.
    EPA is thus approving the use of the following ASTM methods for the 
contaminants and their respective regulations listed in the following 
table:

----------------------------------------------------------------------------------------------------------------
         ASTM revised version              Approved method            Contaminant               Regulation
----------------------------------------------------------------------------------------------------------------
D 1253-14 (ASTM 2014a)...............  D 1253-03 (ASTM 2003a).  Free Chlorine; Total     40 CFR 141.74(a)(2); 40
                                                                 Chlorine.                CFR 141.131(c)(1).
D 1253-14 (ASTM 2014a)...............  D 1253-03 (ASTM 2003a).  Combined Chlorine......  40 CFR 141.131(c)(1).
D 1125-14 A (ASTM 2014b).............  D 1125-95 A (ASTM 1995)  Conductivity...........  40 CFR 141.23(k)(1).
D 511-14 A (ASTM 2014c)..............  D 511-03 A (ASTM 2003b)  Calcium; Magnesium.....  40 CFR 141.23(k)(1).
D 511-14 B (ASTM 2014c)..............  D 511-03 B (ASTM 2003b)  Calcium; Magnesium.....  40 CFR 141.23(k)(1).
D 1688-12 A (ASTM 2012a).............  D 1688-02 A (ASTM        Copper.................  40 CFR 141.23(k)(1).
                                        2002a).
D 1688-12 C (ASTM 2012a).............  D 1688-02 C (ASTM        Copper.................  40 CFR 141.23(k)(1).
                                        2002a).
D 3697-12 (ASTM 2012b)...............  D 3697-02 (ASTM 2002b).  Antimony...............  40 CFR 141.23(k)(1).
----------------------------------------------------------------------------------------------------------------

    The ASTM methods are available from ASTM International, 100 Barr 
Harbor Drive, West Conshohocken, PA 19428-2959 or http://www.astm.org.

B. Methods Developed by Vendors

    1. Hach Method 10241--Spectrophotometric Measurement of Free 
Chlorine (Cl2) in Finished Drinking Water (Hach Company 
2015a). In Hach Method 10241, free chlorine is converted to 
monochloramine by addition of an ammonia solution to a drinking water 
sample. In the presence of a cyanoferrate catalyst, monochloramine 
reacts with a substituted phenol to form an intermediate monoamine 
compound. The intermediate monoamine compound couples with excess 
substituted phenol to form a green indophenol compound. 
Spectrophotometric measurement of absorbance at 655 nm (610 nm for 
colorimeters) is directly proportional to the concentration of free 
chlorine in the sample.
    The currently approved methods for free chlorine in drinking water 
are listed in the tables at 40 CFR 141.74(a)(2) and 40 CFR 
141.131(c)(1). One of the most widely used approved methods is Standard 
Method 4500-Cl G-00 (APHA 2000a), which uses a N,N-diethyl-p-
phenylenediamine (DPD) indicator for spectrophotometric determination 
of residual chlorine concentrations in drinking water. The DPD 
methodology can be subject to interferences associated with the 
presence of manganese, chloramines, and other oxidants. Hach Method 
10241 is not subject to such interferences.
    A multi-laboratory study compared the performance characteristics 
of Hach Method 10241 to the performance characteristics of the approved 
Standard Method 4500-Cl G-00. A variety of samples, including drinking 
water samples from both surface water and ground water sources, were 
fortified with known chlorine concentrations and analyzed by each 
method. The results are summarized in the validation study report (Hach 
Company 2015b). EPA has determined that Hach Method 10241 is equally as 
effective as the approved Standard Method 4500-Cl G-00. The basis for 
this determination is discussed in Adams and Smith (2016). Therefore, 
EPA is approving Hach Method 10241 for determining free chlorine 
concentrations in drinking water. Hach Method 10241 can be obtained 
from Hach Company, 5600 Lindbergh Drive, Loveland, Colorado 80539. 
(http://www.hach.com.)
    2. Hach Method 8026--Spectrophotometric Measurement of Copper in 
Finished Drinking Water (Hach Company 2015c). In Hach Method 8026, 
cuprous copper is measured colorimetrically by complexation with 
bicinchoninic acid. The intensity in color is proportional to the 
copper concentration, and spectrophotometer measurements are taken at 
560 nm. Cupric copper present in samples is chemically reduced to 
cuprous copper. Metal and hardness interferences in samples are 
mitigated through the use of a chelating agent. The method is performed 
by the addition of

[[Page 46841]]

powder pillows containing reagents to the water samples.
    The currently approved methods for the analysis of copper in 
drinking water are listed in the table at 40 CFR 141.23(k)(1). The 
approved methods are based on atomic spectroscopy technologies. Hach 
Method 8026 employs a spectrophotometer, and is based on known 
complexation principles and simple color/absorbance measurements to 
determine copper concentrations.
    A multi-laboratory validation study was conducted to compare the 
performance of Hach Method 8026 to EPA Method 200.7 (USEPA 1994), one 
of the approved methods for the analysis of copper in drinking water. 
Multiple finished drinking water samples drawn from both ground water 
and surface water sources were used in the validation study. Precision, 
accuracy and sensitivity data were collected by analyzing drinking 
water samples fortified with varying concentrations of copper 
standards. The results are summarized in the validation study report 
(Hach Company 2015d). EPA has determined that Hach Method 8026 is 
equally as effective as the approved EPA Method 200.7. The basis for 
this determination is discussed in Adams and Smith (2016). Therefore, 
EPA is approving Hach Method 8026 for the analysis of copper in 
drinking water. Hach Method 8026 can be obtained from Hach Company, 
5600 Lindbergh Drive, Loveland, Colorado 80539. (http://www.hach.com).
    3. Hach Method 10261--Total Organic Carbon in Finished Drinking 
Water by Catalyzed Ozone Hydroxyl Radical Oxidation Infrared Analysis 
(Hach Company 2015e). Hach Method 10261 is a method for the 
determination of total organic carbon (TOC) in drinking water using an 
advanced oxidation process and non-dispersive infrared spectroscopy. In 
this method, ozone and a base are added to water to produce hydroxyl 
radicals. The hydroxyl radicals oxidize organic carbon to produce 
carbon dioxide and sodium oxalate. The sodium oxalate is further 
oxidized to carbon dioxide using acidification and a manganese 
catalyst. The carbon dioxide produced by both oxidation processes is 
then measured using non-dispersive infrared spectroscopy.
    The currently approved methods for the analysis of TOC in drinking 
water are listed in 40 CFR 141.131(d)(3). The approved oxidation 
method, Standard Method 5310 C-00 (APHA 2000b), may not completely 
oxidize certain organic compounds. Hach Method 10261 uses a more 
efficient advanced oxidation process to ensure more complete oxidation.
    A multi-laboratory validation study was conducted to compare the 
performance of Hach Method 10261 to the approved Standard Method 5310 
C-00. Multiple finished drinking water samples drawn from both ground 
water and surface water sources were used in the validation study. 
Precision, accuracy and sensitivity data were collected by analyzing 
drinking water samples fortified with varying concentrations of TOC. 
The results are summarized in the validation study report (Hach Company 
2015f). EPA has determined that Hach Method 10261 is equally as 
effective as the approved Standard Method 5310 C-00. The basis for this 
determination is discussed in Adams and Smith (2016). Therefore, EPA is 
approving Hach Method 10261 for the analysis of TOC in drinking water. 
Hach Method 10261 can be obtained from Hach Company, 5600 Lindbergh 
Drive, Loveland, Colorado 80539. (http://www.hach.com).
    4. Hach Method 10267--Spectrophotometric Measurement of Total 
Organic Carbon (TOC) in Finished Drinking Water (Hach Company 2015g). 
Hach Method 10267 is used for the determination of TOC in drinking 
water using acid persulfate digestion and visible spectrum 
spectrophotometry. In this method, samples are oxidized using acid 
persulfate digestions to convert TOC into carbon dioxide. The generated 
carbon dioxide is passed through a gas-permeable membrane into an 
indicator solution that is measured spectrophotometrically at 435 nm. 
Hach Method 10267 uses pre-packaged reagents to simplify sample 
preparation and quickly perform the analysis. Interfering inorganic 
carbon is removed from the sample prior to digestion by acidification 
and agitation.
    The currently approved methods for the analysis of TOC in drinking 
water are listed in 40 CFR 141.131(d)(3). A multi-laboratory validation 
study was conducted to compare the performance of Hach Method 10267 to 
the approved Standard Method 5310 C-00 (APHA 200b). Multiple finished 
drinking water samples drawn from both ground water and surface water 
sources were used in the validation study. Precision, accuracy and 
sensitivity data were collected by analyzing drinking water samples 
fortified with varying concentrations of TOC. The results are 
summarized in the validation study report (Hach Company 2015h). EPA has 
determined that Hach Method 10267 is equally as effective as the 
approved Standard Method 5310 C-00. The basis for this determination is 
discussed in Adams and Smith (2016). Therefore, EPA is approving Hach 
Method 10267 for the analysis of TOC in drinking water. Hach Method 
10267 can be obtained from Hach Company, 5600 Lindbergh Drive, 
Loveland, Colorado 80539. (http://www.hach.com).
    5. Hach Method 10272--Spectrophotometric Measurement of Copper in 
Finished Drinking Water (Hach Company 2015i). In Hach Method 10272, 
cuprous copper is measured colorimetrically by complexation with 
bicinchoninic acid. The intensity in color is proportional to the 
copper concentration, and spectrophotometer measurements are taken at 
560 nm. Cupric copper present in samples is chemically reduced to 
cuprous copper. Metal and hardness interferences in samples are 
mitigated through the use of a chelating agent. The method is performed 
through the use of a copper Chemkey and portable analyzer.
    The currently approved methods for the analysis of copper in 
drinking water are listed in the table at 40 CFR 141.23(k)(1). The 
approved methods are based on atomic spectroscopy technologies. Hach 
Method 10272 uses a spectrophotometer, simple color/absorbance 
measurements to determine copper concentrations, and incorporates 
portability and streamlining into the analysis.
    A multi-laboratory validation study was conducted to compare the 
performance of Hach Method 10272 to EPA Method 200.7 (USEPA 1994), one 
of the approved methods for the analysis of copper in drinking water. 
Multiple finished drinking water samples drawn from both ground water 
and surface water sources were used in the validation study. Precision, 
accuracy and sensitivity data were collected by analyzing drinking 
water samples fortified with varying concentrations of copper 
standards. The results are summarized in the validation study report 
(Hach Company 2015j). EPA has determined that Hach Method 10272 is 
equally as effective as the approved EPA Method 200.7. The basis for 
this determination is discussed in Adams and Smith (2016). Therefore, 
EPA is approving Hach Method 10272 for the analysis of copper in 
drinking water. Hach Method 10272 can be obtained from Hach Company, 
5600 Lindbergh Drive, Loveland, Colorado 80539. (http://www.hach.com).
    6. Hach Method 10258--Determination of Turbidity by 360[deg] 
Nephelometry (Hach Company 2016). In Hach Method 10258 turbidity is 
determined in conventional-filtered and membrane-filtered treated 
drinking water using a 360 degree nephelometer.

[[Page 46842]]

In this method, a non-incandescent light source operates at a 
wavelength of 660 + 30 nm and light scattered by the sample is 
collected and detected at an angle 90 degrees to the incident light, 
360 degrees around the sample vial. This design offers improved 
sensitivity (minimum quantitation limit of 0.0005 Nephelometric 
Turbidity Units (NTU) and resolution (0.0001 NTU) relative to the 
approved methods.
    The currently approved methods for the analysis of turbidity in 
treated drinking water are listed in the regulations at 40 CFR 
141.74(a)(1). A multi-facility validation study was conducted to 
compare the performance of Hach Method 10258 to the approved Hach 
FilterTrak Method 10133 (Hach Company 2000) for the analysis of 
turbidity in treated drinking water. Seven public drinking water 
facilities participated in the study. Three facilities produced treated 
water using both conventional-filtration and membrane-filtration, two 
facilities produced only conventional-filtration treated water, and two 
facilities produced only membrane-filtration treated water. Source 
waters encompassed both surface waters and ground waters under the 
direct influence of surface water. Turbidity comparison data were 
collected at each facility by operating the instrument collecting the 
Hach Method 10258 turbidity data in parallel with an instrument 
collecting turbidity data using the approved Hach FilterTrack Method 
10133. Precision and accuracy (based on recovery of matrix spike 
injections) data were collected over a range of spike levels (0.0015-
0.500 NTU) and calibration verification data were collected from each 
facility. The results are summarized in the validation study report 
(Hach Company 2014). EPA has determined that Hach Method 10258 is 
equally as effective as the approved Hach FilterTrak Method 10133. The 
basis for this determination is discussed in Adams and Smith (2016). 
Therefore, EPA is approving Hach Method 10258 for the analysis of 
turbidity in treated drinking water. Hach Method 10258 can be obtained 
from Hach Company, 5600 Lindbergh Drive, Loveland, Colorado 80539. 
(http://www.hach.com).
    7. Nitrate Elimination Company, Inc. (NECi)--Method for Nitrate 
Reductase Nitrate-Nitrogen Analysis of Drinking Water (NECi 2016a). The 
NECi nitrate reductase method is used for the determination of nitrate 
plus nitrite (as nitrogen) in drinking water. In this method, a 
eukaryotic nitrate reductase is used to catalyze the conversion of 
nitrate to nitrite in the presence of nicotinamide adenine dinucleotide 
as a reductant in a buffer with a near neutral pH. The combined nitrite 
(both the original and reduced nitrate) is reacted with sulfanilamide 
and N-(1-napthyl) ethylenediamine dihydrochloride to produce a 
chromophore. The combined nitrite concentration is then measured 
spectrophotometrically at ~540 nm. The method entails the use of a 
discrete analyzer that incorporates a spectrophotometric detector.
    The currently approved methods for the analysis of nitrate and 
nitrite in drinking water are listed in 40 CFR 141.23(k)(1). The 
approved EPA Method 353.2 (USEPA 1993a) uses cadmium to reduce nitrate 
to nitrite and subsequently measures the combined nitrite 
colorimetrically. The NECi nitrate reductase method provides an 
environmentally friendly approach to nitrate-nitrogen analysis by 
eliminating the use of toxic cadmium and requires only a fraction of 
the sample volume used in the approved EPA method.
    A multi-laboratory validation study was conducted to compare the 
performance of the NECi nitrate reductase method to the approved EPA 
Method 353.2. Multiple finished drinking water samples drawn from both 
ground water and surface water sources were used in the validation 
study. Precision, accuracy and sensitivity data were collected by 
analyzing drinking water samples fortified with varying concentrations 
of nitrate standards. The results are summarized in the validation 
study report (NECi 2016b). EPA has determined that the NECi nitrate 
reductase method is equally as effective as the approved EPA Method 
353.2. The basis for this determination is discussed in Adams and 
Wendelken (2016). Therefore, EPA is approving the NECi nitrate 
reductase method for the analysis of nitrate and nitrite in drinking 
water. The NECi nitrate reductase method can be obtained from the 
Nitrate Elimination Company, Inc. (NECi) at Superior Enzymes, Inc., 334 
Hecla St., Lake Linden, Michigan 49945.
    8. Thermo Fisher Scientific Drinking Water Orthophosphate Method 
for Thermo Scientific Gallery Discrete Analyzer (Thermo Fisher 2016a). 
The Thermo Fisher orthophosphate drinking water method employing Thermo 
Scientific Gallery discrete analyzers is used for the colorimetric 
determination of orthophosphate in drinking water. In this method, 
orthophosphate is reacted with ammonium molybdate and antimony 
potassium tartrate in an acidic medium to form an antimony-phospho-
molybdate complex. The complex is subsequently reduced by ascorbic acid 
to form an intensely blue complex that can be measured 
spectrophotometrically at 880 nm.
    The currently approved methods for the analysis of orthophosphate 
in drinking water are listed in 40 CFR 141.23(k)(1). Standard Methods 
4500-P E (APHA, 1995) is an approved method that uses ascorbic acid to 
reduce reacted orthophosphate into a complex that can be measured 
spectrophotometrically. The Thermo Fisher orthophosphate method 
incorporates an automated discrete analyzer, which minimizes the use of 
chemical reagents, generation of waste and human handling errors.
    A validation study was conducted to compare the performance of the 
automated Thermo Fisher orthophosphate discrete analyzer method to the 
approved Standard Method 4500-P E. Multiple finished drinking water 
samples drawn from both ground water and surface water sources were 
used in the validation study. Precision, accuracy and sensitivity data 
were collected by analyzing drinking water samples fortified with 
varying concentrations of orthophosphate standards. The results are 
summarized in the validation study report (Thermo Fisher 2016b). EPA 
has determined that the Thermo Fisher discrete analyzer method for 
orthophosphate is equally as effective as the approved Standard Method 
4500-P E. Therefore, EPA is approving the Thermo Fisher method for the 
analysis of orthophosphate in treated drinking water. The basis for 
this determination is discussed in Adams (2016). The Thermo Fisher 
discrete analyzer method for orthophosphate can be obtained from Thermo 
Fisher Scientific, Ratastie 2, 01620 Vantaa, Finland.
    9. Mitchell Method M5331, Revision 1.2--Determination of Turbidity 
by LED or Laser Nephelometry (Mitchell 2016). Mitchell Method M5331, 
Revision 1.1 (Mitchell 2009) was approved for the determination of 
turbidity in drinking water by light emitting diode (LED) nephelometry 
in the August 2009 expedited methods approval action (USEPA 2009). The 
currently approved methods for turbidity are listed in 40 CFR 
141.74(a)(1) and different sources, including lasers, have been 
approved. The Mitchell Method M5331 has been updated to incorporate the 
option of using a solid-state laser in place of a LED as the light 
source for the turbidimeter. The vendor cites multiple advantages 
associated with the use of lasers relative to LEDs (Mitchell 2015). 
Mitchell Method M5331, Revision 1.1 specifies a light source of 525 
 15 nm, and now lasers at 520 nm and 532 nm are readily 
available. In addition to

[[Page 46843]]

meeting the specified wavelength range, solid-state lasers can offer 
longer source lifetimes, greater stability, and improved stray light 
rejection. The updated method is the same as the approved Mitchell 
Method M5331, Revision 1.1 relative to the divergence of the light 
source measurement area, the detector, and all other instrumental 
features. EPA has determined that the updated method is equally as 
effective as the promulgated EPA Method 180.1 (USEPA 1993b), which 
established the criteria for nephelometric determination of turbidity. 
The basis for this determination is discussed in Wendelken and Smith 
(2016). Therefore, EPA is approving Mitchell Method M5331, Revision 1.2 
for the determination of turbidity in drinking water. Mitchell Method 
M5331, Revision 1.2 can be obtained from Leck Mitchell, Ph.D., PE, 656 
Independence Valley Drive, Grand Junction, Colorado 81507.

 IV. Statutory and Executive Order Reviews

    As noted in Section II, under the terms of SDWA Section 1401(1), 
this streamlined method approval action is not a rule. Accordingly, the 
Congressional Review Act, 5 U.S.C. 801 et seq., as added by the Small 
Business Regulatory Enforcement Fairness Act of 1996, does not apply 
because this action is not a rule for purposes of 5 U.S.C. 804(3). 
Similarly, this action is not subject to the Regulatory Flexibility Act 
because it is not subject to notice and comment requirements under the 
Administrative Procedure Act or any other statute. In addition, because 
this approval action is not a rule but simply makes alternative testing 
methods available as options for monitoring under SDWA, EPA has 
concluded that other statutes and executive orders generally applicable 
to rulemaking do not apply to this approval action.

V. References

Adams. 2016. Memo to the record describing basis for expedited 
approval of Thermo Fisher discrete analyzer method for 
orthophosphate. February 18, 2016.
Adams and Smith. 2016. Memo to the record describing basis for 
expedited approval of Hach Company methods. February 29, 2016.
Adams and Wendelken. 2016. Memo to the record describing basis for 
expedited approval of Nitrate Elimination Company Inc. (NECi) 
nitrate reductase method. February 9, 2016.
American Public Health Association (APHA). 1995. 19th Edition of 
Standard Methods for the Examination of Water and Wastewater, 
American Public Health Association, 800 I Street NW., Washington, DC 
20001-3710.
American Public Health Association (APHA). 2000a. Standard Method 
4500-Cl G-00, Chlorine (Residual)--DPD Colorimetric Method. Approved 
by Standard Methods Committee 2000. Standard Methods Online 
(Available at http://www.standardmethods.org).
American Public Health Association (APHA). 2000b. Standard Method 
5310 C-00, Total Organic Carbon (TOC)--Persulfate-Ultraviolet or 
Heated Persulfate Oxidation Method. Approved by Standard Methods 
Committee 2000. Standard Methods Online (Available at http://www.standardmethods.org).
ASTM International. 1995. ASTM D 1125-95 A. Standard Test Methods 
for Electrical Conductivity and Resistivity of Water. ASTM 
International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-
2959. (Available at http://www.astm.org.)
ASTM International. 2002a. ASTM D 1688-02 A, C. Standard Test 
Methods for Copper in Water. ASTM International, 100 Barr Harbor 
Drive, West Conshohocken, PA 19428-2959. (Available at http://www.astm.org.)
ASTM International. 2002b. ASTM D 3697-02. Standard Test Method for 
Antimony in Water. ASTM International, 100 Barr Harbor Drive, West 
Conshohocken, PA 19428-2959. (Available at http://www.astm.org.)
ASTM International. 2003a. ASTM D 1253-03. Standard Test Method for 
Residual Chlorine in Water. ASTM International, 100 Barr Harbor 
Drive, West Conshohocken, PA 19428-2959. (Available at http://www.astm.org.)
ASTM International. 2003b. ASTM D 511-03 A, B. Standard Test Methods 
for Calcium and Magnesium in Water. ASTM International, 100 Barr 
Harbor Drive, West Conshohocken, PA 19428-2959. (Available at http://www.astm.org.)
ASTM International. 2012a. ASTM D 1688-12 A, C. Standard Test 
Methods for Copper in Water. ASTM International, 100 Barr Harbor 
Drive, West Conshohocken, PA 19428-2959. (Available at http://www.astm.org.)
ASTM International. 2012b. ASTM D 3697-12. Standard Test Method for 
Antimony in Water. ASTM International, 100 Barr Harbor Drive, West 
Conshohocken, PA 19428-2959. (Available at http://www.astm.org.)
ASTM International. 2014a. ASTM D 1253-14. Standard Test Method for 
Residual Chlorine in Water. ASTM International, 100 Barr Harbor 
Drive, West Conshohocken, PA 19428-2959. (Available at http://www.astm.org.)
ASTM International. 2014b. ASTM D 1125-14 A. Standard Test Methods 
for Electrical Conductivity and Resistivity of Water. ASTM 
International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-
2959. (Available at http://www.astm.org.)
ASTM International. 2014c. ASTM D 511-14 A, B. Standard Test Methods 
for Calcium and Magnesium in Water. ASTM International, 100 Barr 
Harbor Drive, West Conshohocken, PA 19428-2959. (Available at http://www.astm.org.)
Hach Company. 2000. Hach FilterTrak Method 10133--Determination of 
Turbidity by Laser Nephelometry. January 2000. Revision 2.0. 5600 
Lindbergh Drive, Loveland, Colorado 80539. (Available at http://www.hach.com.)
Hach Company. 2014. Validation Study Report for Hach Method 10258--
Measurement of Turbidity in Drinking Water by 360 Degree 
Nephelometry. December 2014. 5600 Lindbergh Drive, Loveland, 
Colorado 80539. (Available at http://www.regulations.gov; docket ID 
No. EPA-HQ-OW-2016-0281.)
Hach Company. 2015a. Hach Method 10241--Spectrophotometric 
Measurement of Free Chlorine (Cl2) in Finished Drinking 
Water. November 2015. Revision 1.2. 5600 Lindbergh Drive, Loveland, 
Colorado 80539. (Available at http://www.hach.com.)
Hach Company. 2015b. Validation Study Report for Hach Method 10241--
Spectrophotometric Measurement of Free Chlorine in Drinking Water. 
November 2015. 5600 Lindbergh Drive, Loveland, Colorado 80539. 
(Available at http://www.regulations.gov; docket ID No. EPA-HQ-OW-
2016-0281.)
Hach Company. 2015c. Hach Method 8026--Spectrophotometric 
Measurement of Copper in Finished Drinking Water. December 2015. 
Revision 1.2. 5600 Lindbergh Drive, Loveland, Colorado 80539. 
(Available at http://www.hach.com.)
Hach Company. 2015d. Validation Study Report for Hach Method 8026--
Spectrophotometric Measurement of Copper in Drinking Water. November 
2015. 5600 Lindbergh Drive, Loveland, Colorado 80539. (Available at 
http://www.regulations.gov; docket ID No. EPA-HQ-OW-2016-0281.)
Hach Company. 2015e. Hach Method 10261--Total Organic Carbon in 
Finished Drinking Water by Catalyzed Ozone Hydroxyl Radical 
Oxidation Infrared Analysis. December 2015. Revision 1.2. 5600 
Lindbergh Drive, Loveland, Colorado 80539. (Available at http://www.hach.com.)
Hach Company. 2015f. Validation Study Report for Hach Method 10261--
Total Organic Carbon in Finished Drinking Water by Catalyzed Ozone 
Hydroxyl Radical Oxidation Infrared Analysis. December 2015. 5600 
Lindbergh Drive, Loveland, Colorado 80539. (Available at http://www.regulations.gov; docket ID No. EPA-HQ-OW-2016-0281.)
Hach Company. 2015g. Hach Method 10267--Spectrophotometric 
Measurement of Total Organic Carbon (TOC) in Finished Drinking 
Water. December 2015. Revision 1.2. 5600 Lindbergh Drive, Loveland, 
Colorado 80539. (Available at http://www.hach.com.)
Hach Company. 2015h. Validation Study Report for Hach Method 10267--
Spectrophotometric Measurement of Total Organic Carbon (TOC) in 
Finished Drinking Water. December 2015. 5600 Lindbergh Drive, 
Loveland, Colorado

[[Page 46844]]

80539. (Available at http://www.regulations.gov; docket ID No. EPA-
HQ-OW-2016-0281.)
Hach Company. 2015i. Hach Method 10272--Spectrophotometric 
Measurement of Copper in Finished Drinking Water. December 2015. 
Revision 1.2. 5600 Lindbergh Drive, Loveland, Colorado 80539. 
(Available at http://www.hach.com.)
Hach Company. 2015j. Validation Study Report for Hach Method 10272--
Spectrophotometric Measurement of Copper in Finished Drinking Water. 
December 2015. 5600 Lindbergh Drive, Loveland, Colorado 80539. 
(Available at http://www.regulations.gov; docket ID No. EPA-HQ-OW-
2016-0281.)
Hach Company. 2016. Hach Method 10258--Determination of Turbidity by 
360[deg] Nephelometry. January 2016. 5600 Lindbergh Drive, Loveland, 
Colorado 80539. (Available at http://www.hach.com.)
Mitchell, L. and Mitchell, P. 2009. Mitchell Method M5331--
Determination of Turbidity by LED Nephelometry. March 2009. Revision 
1.1. Leck Mitchell, Ph.D., PE, 656 Independence Valley Drive, Grand 
Junction, CO 81507. (Available at http://www.regulations.gov; docket 
ID No. EPA-HQ-OW-2016-0281.)
Mitchell, L. 2015. Mitchell ATP Submission with Justification for 
Revision to Mitchell Method M5331, Revision 1.1. September 2015. 
Leck Mitchell, Ph.D., PE, 656 Independence Valley Drive, Grand 
Junction, CO 81507. (Available at http://www.regulations.gov; docket 
ID No. EPA-HQ-OW-2016-0281.)
Mitchell, L. and Mitchell, P. 2016. Mitchell Method M5331--
Determination of Turbidity by LED or Laser Nephelometry. February 
2016. Revision 1.2. Leck Mitchell, Ph.D., PE, 656 Independence 
Valley Drive, Grand Junction, CO 81507. (Available at http://www.regulations.gov; docket ID No. EPA-HQ-OW-2016-0281.)
Nitrate Elimination Company, Inc. (NECi). 2016a. Method for Nitrate 
Reductase Nitrate-Nitrogen Analysis of Drinking Water. February 
2016. Version 1.0. Revision 2.0. Superior Enzymes, Inc., 334 Hecla 
Street, Lake Linden, Michigan 49945. (Available at http://www.regulations.gov; docket ID No. EPA-HQ-OW-2016-0281.)
Nitrate Elimination Company, Inc. (NECi). 2016b. Validation Study 
Report for NECi Nitrate-Reductase Nitrate plus Nitrite Nitrogen 
Method. January 2016. Superior Enzymes, Inc., 334 Hecla Street, Lake 
Linden, Michigan 49945. (Available at http://www.regulations.gov; 
docket ID No. EPA-HQ-OW-2016-0281.)
Smith, G. 2015. Memo to the record describing basis for expedited 
approval of updated methods from ASTM International. December 30, 
2015.
Thermo Fisher. 2016a. Thermo Fisher Scientific Drinking Water 
Orthophosphate Method for Thermo Scientific Gallery Discrete 
Analyzer. February 2016. Revision 5. Thermo Fisher Scientific, 
Ratastie 2, 01620 Vantaa, Finland. (Available at http://www.regulations.gov; docket ID No. EPA-HQ-OW-2016-0281.)
Thermo Fisher. 2016b. Validation Study Report for Thermo Fisher 
Orthophosphate Discrete Analyzer Method. February 2016. Thermo 
Fisher Scientific, Ratastie 2, 01620 Vantaa, Finland. (Available at 
http://www.regulations.gov; docket ID No. EPA-HQ-OW-2016-0281.)
USEPA. 1993a. EPA Method 353.2. Revision 2.0, ``Determination of 
Nitrate-Nitrite Nitrogen by Automated Colorimetry,'' August 1993. 
(Available at https://www.nemi.gov.)
USEPA. 1993b. EPA Method 180.1. Revision 2.0, ``Determination of 
Turbidity by Nephelometry,'' August 1993. (Available at https://www.nemi.gov.)
USEPA. 1994. EPA Method 200.7. Revision 4.4, ``Determination of 
Metals and Trace Elements in Water and Wastes by Inductively Coupled 
Plasma-Atomic Emission Spectrometry,'' May 1994. (Available at 
https://www.nemi.gov.)
USEPA. 2009. Expedited Approval of Alternative Test Procedures for 
the Analysis of Contaminants Under the Safe Drinking Water Act; 
Analysis and Sampling Procedures, 74 FR 38348, August 3, 2009.
Wendelken and Smith. 2016. Memo to record describing basis for 
expedited approval of Mitchell Method M5331, Revision 1.2. February 
24, 2016.

List of Subjects in 40 CFR Part 141

    Environmental protection, Chemicals, Indians-lands, 
Intergovernmental relations, Reporting and recordkeeping requirements, 
Water supply.

    Dated: July 7, 2016.
Peter Grevatt,
Director, Office of Ground Water and Drinking Water.

    For the reasons stated in the preamble, 40 CFR part 141 is amended 
as follows:

PART 141--NATIONAL PRIMARY DRINKING WATER REGULATIONS

0
1. The authority citation for part 141 continues to read as follows:

    Authority:  42 U.S.C. 300f, 300g-1, 300g-2, 300g-3, 300g-4, 
300g-5, 300g-6, 300j-4, 300j-9, and 300j-11.

0
2. Appendix A to subpart c of part 141 is amended as follows:
0
a. By revising entries for ``Antimony,'' ``Calcium,'' ``Copper,'' 
``Conductivity,'' ``Magnesium,'' ``Nitrate,'' ``Nitrite,'' and 
``Orthophosphate,'' in the table entitled ``ALTERNATIVE TESTING METHODS 
FOR CONTAMINANTS LISTED AT 40 CFR 141.23(k)(1).''
0
b. By revising the entry for ``Turbidity'' in the table entitled 
``ALTERNATIVE TESTING METHODS FOR CONTAMINANTS LISTED AT 40 CFR 
141.74(a)(1).''
0
c. By revising entries for ``Free Chlorine'' and ``Total Chlorine'' in 
the table entitled ``ALTERNATIVE TESTING METHODS FOR DISINFECTANT 
RESIDUALS LISTED AT 40 CFR 141.74(a)(2).''
0
d. By revising the entries for ``Free Chlorine'', ``Combined 
Chlorine,'' and ``Total Chlorine'' in the table entitled ``ALTERNATIVE 
TESTING METHODS FOR DISINFECTANT RESIDUALS LISTED AT 40 CFR 
141.131(c)(1).''
0
e. By revising the entire table entitled ``ALTERNATIVE TESTING METHODS 
FOR PARAMETERS LISTED AT 40 CFR 141.131(d).''
0
f. By revising footnotes 2, 9, 14, 16, 18, 19, 24-27, 29, and 33.
0
g. By adding footnotes 34-42 to the table.
    The revisions and additions read as follows:

Appendix A to Subpart C of Part 141--Alternative Testing Methods 
Approved for Analyses Under the Safe Drinking Water Act

* * * * *

                                       Alternative Testing Methods for Contaminants Listed at 40 CFR 141.23(k)(1)
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                  SM 21st Edition   SM 22nd Edition
        Contaminant             Methodology       EPA method            \1\              \28\          SM Online \3\       ASTM \4\           Other
--------------------------------------------------------------------------------------------------------------------------------------------------------
 
                                                                      * * * * * * *
Antimony...................  Hydride-Atomic    ................  ................  ................  ................  D 3697-07, -12..  ...............
                              Absorption.
                             Atomic            ................  3113 B..........  3113 B..........  3113 B-04, B-10.  ................  ...............
                              Absorption;
                              Furnace.

[[Page 46845]]

 
                             Axially viewed    200.5, Revision   ................  ................  ................  ................  ...............
                              inductively       4.2.\2\.
                              coupled plasma-
                              atomic emission
                              spectrometry
                              (AVICP-AES).
 
                                                                      * * * * * * *
Calcium....................  EDTA Titrimetric  ................  3500-Ca B.......  3500-Ca B.......  ................  D 511-09, -14 A.  ...............
                             Atomic            ................  3111 B..........  3111 B..........  ................  D 511-90, -14 B.  ...............
                              Absorption;
                              Direct
                              Aspiration.
                             Inductively       ................  3120 B..........  3120 B..........  ................  ................  ...............
                              Coupled Plasma.
                             Axially viewed    200.5, Revision   ................  ................  ................  ................  ...............
                              inductively       4.2.\2\.
                              coupled plasma-
                              atomic emission
                              spectrometry
                              (AVICP-AES).
                             Ion               ................  ................  ................  ................  D 6919-09.......  ...............
                              Chromatography.
 
                                                                      * * * * * * *
Copper.....................  Atomic            ................  3113 B..........  3113 B..........  3113 B-04, B-10.  D 1688-07, -12 C  ...............
                              Absorption;
                              Furnace.
                             Atomic            ................  3111 B..........  3111 B..........  ................  D 1688-07, -12 A  ...............
                              Absorption;
                              Direct
                              Aspiration.
                             Inductively       ................  3120 B..........  3120 B..........  ................  ................  ...............
                              Coupled Plasma.
                             Axially viewed    200.5, Revision   ................  ................  ................  ................  ...............
                              inductively       4.2.\2\.
                              coupled plasma-
                              atomic emission
                              spectrometry
                              (AVICP-AES).
                             Colorimetric....  ................  ................  ................  ................  ................  Hach Method
                                                                                                                                          8026 \35\ Hach
                                                                                                                                          Method
                                                                                                                                          10272.\36\
Conductivity...............  Conductance.....  ................  2510 B..........  2510 B..........  ................  D 1125-14 A.....  ...............
 
                                                                      * * * * * * *
Magnesium..................  Atomic            ................  3111 B..........  3111 B..........  ................  D 511-09, -14 B.  ...............
                              Absorption.
                             Inductively       ................  3120 B..........  3120 B..........  ................  ................  ...............
                              Coupled Plasma.
                             Complexation      ................  3500-Mg B.......  3500-Mg B.......  ................  D 511-09, -14 A.  ...............
                              Titrimetric
                              Methods.
                             Axially viewed    200.5, Revision   ................  ................  ................  ................  ...............
                              inductively       4.2.\2\.
                              coupled plasma-
                              atomic emission
                              spectrometry
                              (AVICP-AES).
                             Ion               ................  ................  ................  ................  D 6919-09.......  ...............
                              Chromatography.
 
                                                                      * * * * * * *
Nitrate....................  Ion               ................  4110 B..........  4110 B..........  ................  D 4327-11.......  ...............
                              Chromatography.
                             Automated         ................  4500-NO3\-\ F...  4500-NO3\-\ F...  ................  ................  ...............
                              Cadmium
                              Reduction.
                             Manual Cadmium    ................  4500-NO3\-\ E...  4500-NO3\-\ E...  ................  ................  ...............
                              Reduction.
                             Ion Selective     ................  4500-NO3\-\ D...  4500-NO3\-\ D...  ................  ................  ...............
                              Electrode.
                             Reduction/        ................  ................  ................  ................  ................  Systea Easy (1-
                              Colorimetric.                                                                                               Reagent) \8\
                                                                                                                                          NECi Nitrate-
                                                                                                                                          Reductase.\40\
                             Colorimetric;     ................  ................  ................  ................  ................  Hach TNTplus TM
                              Direct.                                                                                                     835/836 Method
                                                                                                                                          10206.\23\
Nitrite....................  Ion               ................  4110 B..........  4110 B..........  ................  D 4327-11.......  ...............
                              Chromatography.
                             Automated         ................  4500-NO3\-\ F...  4500-NO3\-\ F...  ................  ................  ...............
                              Cadmium
                              Reduction.
                             Manual Cadmium    ................  4500-NO3\-\ E...  4500-NO3\-\ E...  ................  ................  ...............
                              Reduction.
                             Spectrophotometr  ................  4500-NO2\-\ B...  4500-NO2\-\ B...  ................  ................  ...............
                              ic.
                             Reduction/        ................  ................  ................  ................  ................  Systea Easy (1-
                              Colorimetric.                                                                                               Reagent) \8\
                                                                                                                                          NECi Nitrate-
                                                                                                                                          Reductase.\40\
Orthophosphate.............  Ion               ................  4110 B..........  4110 B..........  ................  D 4327-11.......  ...............
                              Chromatography.
                             Colorimetric,     ................  4500-P E........  4500-P E........  4500-P E-99.....  ................  ...............
                              ascorbic acid,
                              single reagent.
                             Colorimetric,     ................  4500-P F........  4500-P F........  4500-P F-99.....  ................  Thermo-Fisher
                              Automated,                                                                                                  Discrete
                              Ascorbic Acid.                                                                                              Analyzer.\41\
 
                                                                      * * * * * * *
--------------------------------------------------------------------------------------------------------------------------------------------------------

* * * * *

[[Page 46846]]



                                       Alternative Testing Methods for Contaminants Listed at 40 CFR 141.74(a)(1)
--------------------------------------------------------------------------------------------------------------------------------------------------------
           Organism                Methodology         SM 21st Edition \1\        SM 22nd Edition \28\            SM Online \3\              Other
--------------------------------------------------------------------------------------------------------------------------------------------------------
 
                                                                      * * * * * * *
Turbidity....................  Nephelometric       2130 B....................  2130 B....................
                                Method.
                               Laser Nephelometry  ..........................  ..........................  ..........................  Mitchell
                                (on-line).                                                                                              M5271,\10\
                                                                                                                                        Mitchell M5331,
                                                                                                                                        Rev. 1.2.\42\
                               LED Nephelometry    ..........................  ..........................  ..........................  Mitchell
                                (on-line).                                                                                              M5331,\11\
                                                                                                                                        Mitchell M5331,
                                                                                                                                        Rev. 1.2.\42\
                               LED Nephelometry    ..........................  ..........................  ..........................  AMI
                                (on-line).                                                                                              Turbiwell.\15\
                               LED Nephelometry    ..........................  ..........................  ..........................  Orion AQ4500.\12\
                                (portable).
                               360[deg]            ..........................  ..........................  ..........................  Hach Method
                                Nephelometry.                                                                                           10258.\39\
--------------------------------------------------------------------------------------------------------------------------------------------------------


                                  Alternative Testing Methods for Disinfectant Residuals Listed at 40 CFR 141.74(a)(2)
--------------------------------------------------------------------------------------------------------------------------------------------------------
           Residual                Methodology         SM 21st Edition \1\        SM 22nd Edition \28\              ASTM \4\                 Other
--------------------------------------------------------------------------------------------------------------------------------------------------------
Free Chlorine................  Amperometric        4500-Cl D.................  4500-Cl D.................  D 1253-08, -14............  .................
                                Titration.
                               DPD Ferrous         4500-Cl F.................  4500-Cl F.................  ..........................  .................
                                Titrimetric.
                               DPD Colorimetric..  4500-Cl G.................  4500-Cl G.................  ..........................  Hach Method
                                                                                                                                        10260.\31\
                               Syringaldazine      4500-Cl H.................  4500-Cl H.................  ..........................  .................
                                (FACTS).
                               On-line Chlorine    ..........................  ..........................  ..........................  EPA 334.0.\16\
                                Analyzer.
                               Amperometric        ..........................  ..........................  ..........................  ChloroSense.\17\
                                Sensor.
                               Indophenol          ..........................  ..........................  ..........................  Hach Method
                                Colorimetric.                                                                                           10241.\34\
Total Chlorine...............  Amperometric        4500-Cl D.................  4500-Cl D.................  D 1253-08, -14............  .................
                                Titration.
                               Amperometric        4500-Cl E.................  4500-Cl E.................  ..........................  .................
                                Titration (Low
                                level
                                measurement).
                               DPD Ferrous         4500-Cl F.................  4500-Cl F.................  ..........................  .................
                                Titrimetric.
                               DPD Colorimetric..  4500-Cl G.................  4500-Cl G.................  ..........................  Hach Method
                                                                                                                                        10260.\31\
                               Iodometric          4500-Cl I.................  4500-Cl I.................  ..........................  .................
                                Electrode.
                               On-line Chlorine    ..........................  ..........................  ..........................  EPA 334.0.\16\
                                Analyzer.
                               Amperometric        ..........................  ..........................  ..........................  ChloroSense.\17\
                                Sensor.
 
                                                                      * * * * * * *
--------------------------------------------------------------------------------------------------------------------------------------------------------

* * * * *

                                  Alternative Testing Methods for Disinfectant Residuals Listed at 40 CFR 141.131(c)(1)
--------------------------------------------------------------------------------------------------------------------------------------------------------
           Residual                Methodology         SM 21st Edition \1\        SM 22nd Edition \28\              ASTM \4\                 Other
--------------------------------------------------------------------------------------------------------------------------------------------------------
Free Chlorine................  Amperometric        4500-Cl D.................  4500-Cl D.................  D 1253-08, -14............  .................
                                Titration.
                               DPD Ferrous         4500-Cl F.................  4500-Cl F.................  ..........................  .................
                                Titrimetric.
                               DPD Colorimetric..  4500-Cl G.................  4500-Cl G.................  ..........................  Hach Method
                                                                                                                                        10260.\31\
                               Syringaldazine      4500-Cl H.................  4500-Cl H.................  ..........................  .................
                                (FACTS).
                               Amperometric        ..........................  ..........................  ..........................  ChloroSense.\17\
                                Sensor.
                               On-line Chlorine    ..........................  ..........................  ..........................  EPA 334.0.\16\
                                Analyzer.
                               Indophenol          ..........................  ..........................  ..........................  Hach Method
                                Colorimetric.                                                                                           10241.\34\
Combined Chlorine............  Amperometric        4500-Cl D.................  4500-Cl D.................  D 1253-08, -14............  .................
                                Titration.
                               DPD Ferrous         4500-Cl F.................  4500-Cl F.................  ..........................  .................
                                Titrimetric.
                               DPD Colorimetric..  4500-Cl G.................  4500-Cl G.................  ..........................  Hach Method
                                                                                                                                        10260.\31\
Total Chlorine...............  Amperometric        4500-Cl D.................  4500-Cl D.................  D 1253-08, -14............  .................
                                Titration.
                               Low level           4500-Cl E.................  4500-Cl E.................  ..........................  .................
                                Amperometric
                                Titration.
                               DPD Ferrous         4500-Cl F.................  4500-Cl F.................  ..........................  .................
                                Titrimetric.
                               DPD Colorimetric..  4500-Cl G.................  4500-Cl G.................  ..........................  Hach Method
                                                                                                                                        10260.\31\
                               Iodometric          4500-Cl I.................  4500-Cl I.................  ..........................  .................
                                Electrode.
                               Amperometric        ..........................  ..........................  ..........................  ChloroSense.\17\
                                Sensor.
                               On-line Chlorine    ..........................  ..........................  ..........................  EPA 334.0.\16\
                                Analyzer.
 
                                                                      * * * * * * *
--------------------------------------------------------------------------------------------------------------------------------------------------------

* * * * *

[[Page 46847]]



                                         Alternative Testing Methods for Parameters Listed at 40 CFR 141.131(d)
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                   SM 21st Edition  SM 22nd Edition
           Parameter               Methodology           \1\              \28\        SM  Online \3\           EPA                      Other
--------------------------------------------------------------------------------------------------------------------------------------------------------
Total Organic Carbon (TOC)....  High Temperature   5310 B.........  5310 B.........  ...............  415.3, Rev 1.2.\19\..  ...........................
                                 Combustion.
                                Persulfate-        5310 C.........  5310 C.........  ...............  415.3, Rev 1.2 \19\..  Hach Method 10267.\38\
                                 Ultraviolet or
                                 Heated
                                 Persulfate
                                 Oxidation.
                                Wet Oxidation....  5310 D.........  5310 D.........  ...............  415.3, Rev 1.2.\19\..  ...........................
                                Ozone Oxidation..  ...............  ...............  ...............  .....................  Hach Method 10261.\37\
Specific Ultraviolet            Calculation using  ...............  ...............  ...............  415.3, Rev 1.2.\19\..  ...........................
 Absorbance (SUVA).              DOC and UV254
                                 data.
Dissolved Organic Carbon (DOC)  High Temperature   5310 B.........  5310 B.........  ...............  415.3, Rev 1.2.\19\..  ...........................
                                 Combustion.
                                Persulfate-        5310 C.........  5310 C.........  ...............  415.3, Rev 1.2.\19\..  ...........................
                                 Ultraviolet or
                                 Heated
                                 Persulfate
                                 Oxidation.
                                Wet Oxidation....  5310 D.........  5310 D.........  ...............  415.3, Rev 1.2.\19\..  ...........................
Ultraviolet absorption at 254   Spectrophotometry  5910 B.........  5910 B.........  5910 B-11......  415.3, Rev 1.2.\19\..  ...........................
 nm (UV254).
--------------------------------------------------------------------------------------------------------------------------------------------------------

* * * * *
    \1\ Standard Methods for the Examination of Water and 
Wastewater, 21st edition (2005). Available from American Public 
Health Association, 800 I Street, NW., Washington, DC 20001-3710.
    \2\ EPA Method 200.5, Revision 4.2. ``Determination of Trace 
Elements in Drinking Water by Axially Viewed Inductively Coupled 
Plasma-Atomic Emission Spectrometry.'' 2003. EPA/600/R-06/115. 
(Available at http://www.epa.gov/water-research/epa-drinking-water-research-methods.)
    \3\ Standard Methods Online are available at http://www.standardmethods.org. The year in which each method was approved 
by the Standard Methods Committee is designated by the last two 
digits in the method number. The methods listed are the only online 
versions that may be used.
    \4\ Available from ASTM International, 100 Barr Harbor Drive, 
West Conshohocken, PA 19428-2959 or http://astm.org. The methods 
listed are the only alternative versions that may be used.
* * * * *
    \8\ Systea Easy (1-Reagent). ``Systea Easy (1-Reagent) Nitrate 
Method,'' February 4, 2009. Available at https://www.nemi.gov or 
from Systea Scientific, LLC., 900 Jorie Blvd., Suite 35, Oak Brook, 
IL 60523.
    \9\ EPA Method 524.3, Version 1.0. ``Measurement of Purgeable 
Organic Compounds in Water by Capillary Column Gas Chromatography/
Mass Spectrometry,'' June 2009. EPA 815-B-09-009. Available at the 
National Service Center for Environmental Publications (www.epa.gov/nscep). Search ``815B09009''.
    \10\ Mitchell Method M5271, Revision 1.1. ``Determination of 
Turbidity by Laser Nephelometry,'' March 5, 2009. Available at 
https://www.nemi.gov or from Leck Mitchell, Ph.D., PE, 656 
Independence Valley Dr., Grand Junction, CO 81507.
    \11\ Mitchell Method M5331, Revision 1.1. ``Determination of 
Turbidity by LED Nephelometry,'' March 5, 2009. Available at https://www.nemi.gov or from Leck Mitchell, Ph.D., PE, 656 Independence 
Valley Dr., Grand Junction, CO 81507.
    \12\ Orion Method AQ4500, Revision 1.0. ``Determination of 
Turbidity by LED Nephelometry,'' May 8, 2009. Available at https://www.nemi.gov or from Thermo Scientific, 166 Cummings Center, 
Beverly, MA 01915, http://www.thermo.com.
* * * * *
    \14\ EPA Method 557. ``Determination of Haloacetic Acids, 
Bromate, and Dalapon in Drinking Water by Ion Chromatography 
Electrospray Ionization Tandem Mass Spectrometry (IC-ESI-MS/MS),'' 
September 2009. EPA 815-B-09-012. Available at the National Service 
Center for Environmental Publications (www.epa.gov/nscep). Search 
``815B09012''.
    \15\ AMI Turbiwell, ``Continuous Measurement of Turbidity Using 
a SWAN AMI Turbiwell Turbidimeter,'' August 2009. Available at 
https://www.nemi.gov or from Markus Bernasconi, SWAN Analytische 
Instrumente AG, Studbachstrasse 13, CH-8340 Hinwil, Switzerland.
    \16\ EPA Method 334.0. ``Determination of Residual Chlorine in 
Drinking Water Using an On-line Chlorine Analyzer,'' September 2009. 
EPA 815-B-09-013. Available at the National Service Center for 
Environmental Publications (www.epa.gov/nscep). Search 
``815B09013''.
    \17\ ChloroSense. ``Measurement of Free and Total Chlorine in 
Drinking Water by Palintest ChloroSense,'' August 2009. Available at 
https://www.nemi.gov or from Palintest Ltd, 1455 Jamike Avenue 
(Suite 100), Erlanger, KY 41018.
    \18\ EPA Method 302.0. ``Determination of Bromate in Drinking 
Water using Two-Dimensional Ion Chromatography with Suppressed 
Conductivity Detection,'' September 2009. EPA 815-B-09-014. 
Available at the National Service Center for Environmental 
Publications (www.epa.gov/nscep). Search ``815B09014''.
    \19\ EPA 415.3, Revision 1.2. ``Determination of Total Organic 
Carbon and Specific UV Absorbance at 254 nm in Source Water and 
Drinking Water,'' September 2009. EPA/600/R-09/122. Available at 
http://www.epa.gov/water-research/epa-drinking-water-research-methods.
* * * * *
    \23\ Hach Company. ``Hach Company TNTplus TM 835/836 
Nitrate Method 10206--Spectrophotometric Measurement of Nitrate in 
Water and Wastewater,'' January 2011. 5600 Lindbergh Drive, P.O. Box 
389, Loveland, Colorado 80539. (Available at http://www.hach.com.)
    \24\ EPA Method 525.3. ``Determination of Semivolatile Organic 
Chemicals in Drinking Water by Solid Phase Extraction and Capillary 
Column Gas Chromatography/Mass Spectrometry (GC/MS),'' February 
2012. EPA/600/R-12/010. Available at http://www.epa.gov/water-research/epa-drinking-water-research-methods.
    \25\ EPA Method 536. ``Determination of Triazine Pesticides and 
their Degradates in Drinking Water by Liquid Chromatography 
Electrospray Ionization Tandem Mass Spectrometry (LC/ESI-MS/MS),'' 
October 2007. EPA 815-B-07-002. Available at the National Service 
Center for Environmental Publications (www.epa.gov/nscep). Search 
``815B07002''.
    \26\ EPA Method 523. ``Determination of Triazine Pesticides and 
their Degradates in Drinking Water by Gas Chromatography/Mass 
Spectrometry (GC/MS),'' February 2011. EPA 815-R-11-002. Available 
at the National Service Center for Environmental Publications 
(www.epa.gov/nscep). Search ``815R11002''.
    \27\ EPA Method 1623.1. ``Cryptosporidium and Giardia in Water 
by Filtration/IMS/FA,'' 2012. EPA-816-R-12-001. Available at the 
National Service Center for Environmental Publications (www.epa.gov/nscep). Search ``816R12001''.
    \28\ Standard Methods for the Examination of Water and 
Wastewater, 22nd edition (2012). Available from American Public 
Health Association, 800 I Street, NW., Washington, DC 20001-3710.
    \29\ EPA Method 524.4, Version 1.0. ``Measurement of Purgeable 
Organic Compounds in Water by Gas Chromatography/Mass Spectrometry 
using Nitrogen Purge Gas,'' May 2013. EPA 815-R-13-002. Available at 
the National Service Center for Environmental Publications 
(www.epa.gov/nscep). Search ``815R13002''.
* * * * *
    \31\ Hach Company. ``Hach Method 10260--Determination of 
Chlorinated Oxidants (Free and Total) in Water Using Disposable 
Planar Reagent-filled Cuvettes and Mesofluidic Channel 
Colorimetry,'' April 2013. 5600 Lindbergh Drive, P.O. Box 389, 
Loveland, CO 80539. (Available at http://www.hach.com.)
    \33\ Tecta EC/TC. ``Techta\TM\ EC/TC Medium and Techta\TM\ 
Instrument: A Presence/Absence Method for the Simultaneous Detection 
of Total Coliforms and Escherichia coli (E. coli) in Drinking 
Water,'' version 1.0, May 2014. Available from Veolia Water 
Solutions and Technologies, Suite 4697,

[[Page 46848]]

Biosciences Complex, 116 Barrie Street, Kingston, Ontario, Canada, 
K7L 3N6.
    \34\ Hach Company. ``Hach Method 10241--Spectrophotometric 
Measurement of Free Chlorine (Cl2) in Finished Drinking 
Water,'' November 2015. Revision 1.2. 5600 Lindbergh Drive, P.O. Box 
389, Loveland, CO 80539. (Available at http://www.hach.com.)
    \35\ Hach Company. ``Hach Method 8026--Spectrophotometric 
Measurement of Copper in Finished Drinking Water,'' December 2015. 
Revision 1.2. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 
80539. (Available at http://www.hach.com.)
    \36\ Hach Company. ``Hach Method 10272--Spectrophotometric 
Measurement of Copper in Finished Drinking Water,'' December 2015. 
Revision 1.2. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 
80539. (Available at http://www.hach.com.)
    \37\ Hach Company. ``Hach Method 10261--Total Organic Carbon in 
Finished Drinking Water by Catalyzed Ozone Hydroxyl Radical 
Oxidation Infrared Analysis,'' December 2015. Revision 1.2. 5600 
Lindbergh Drive, P.O. Box 389, Loveland, CO 80539. (Available at 
http://www.hach.com.)
    \38\ Hach Company. ``Hach Method 10267--Spectrophotometric 
Measurement of Total Organic Carbon (TOC) in Finished Drinking 
Water,'' December 2015. Revision 1.2. 5600 Lindbergh Drive, P.O. Box 
389, Loveland, CO 80539. (Available at http://www.hach.com.)
    \39\ Hach Company. ``Hach Method 10258--Determination of 
Turbidity by 360[deg] Nephelometry,'' January 2016. 5600 Lindbergh 
Drive, P.O. Box 389, Loveland, CO 80539. (Available at http://www.hach.com.)
    \40\ Nitrate Elimination Company, Inc. (NECi). ``Method for 
Nitrate Reductase Nitrate-Nitrogen Analysis of Drinking Water,'' 
February 2016. Superior Enzymes, Inc., 334 Hecla Street, Lake 
Linden, Michigan 49945.
    \41\ Thermo Fisher. ``Thermo Fisher Scientific Drinking Water 
Orthophosphate Method for Thermo Scientific Gallery Discrete 
Analyzer,'' February 2016. Revision 5. Thermo Fisher Scientific, 
Ratastie 2, 01620 Vantaa, Finland.
    \42\ Mitchell Method M5331, Revision 1.2. ``Determination of 
Turbidity by LED or Laser Nephelometry,'' February 2016. Available 
from Leck Mitchell, Ph.D., PE, 656 Independence Valley Dr., Grand 
Junction, CO 81507.

[FR Doc. 2016-16516 Filed 7-18-16; 8:45 am]
 BILLING CODE 6560-50-P



                                                                    Federal Register / Vol. 81, No. 138 / Tuesday, July 19, 2016 / Rules and Regulations                                           46839

                                           ENVIRONMENTAL PROTECTION                                       and greater flexibility in the selection of           I. General Information
                                           AGENCY                                                         analytical methods, thereby reducing
                                                                                                          monitoring costs while maintaining                    A. Does this action apply to me?
                                           40 CFR Part 141                                                public health protection.                               Public water systems are the regulated
                                           [EPA–HQ–OW–2016–0281; FRL–9948–54–                             DATES: This action is effective July 19,              entities required to measure
                                           OW]                                                            2016.                                                 contaminants in drinking water
                                                                                                          ADDRESSES: The EPA has established a                  samples. In addition, EPA Regions as
                                           Expedited Approval of Alternative Test                         docket for this action under Docket ID                well as states and tribal governments
                                           Procedures for the Analysis of                                 No. EPA–HQ–2016–0281. All                             with authority to administer the
                                           Contaminants Under the Safe Drinking                           documents in the docket are listed on                 regulatory program for public water
                                           Water Act; Analysis and Sampling                               the http://www.regulations.gov Web                    systems under the Safe Drinking Water
                                           Procedures                                                     site. Although listed in the index, some
                                                                                                                                                                Act (SDWA) may measure contaminants
                                                                                                          information is not publicly available,
                                           AGENCY:  Environmental Protection                                                                                    in water samples. When EPA sets a
                                                                                                          e.g., CBI or other information whose
                                           Agency (EPA).                                                                                                        monitoring requirement in its national
                                                                                                          disclosure is restricted by statute.
                                           ACTION: Final rule.                                            Certain other material, such as                       primary drinking water regulations for a
                                                                                                          copyrighted material, is not placed on                given contaminant, the Agency also
                                           SUMMARY:   This action announces the                                                                                 establishes in the regulations
                                           U.S. Environmental Protection Agency’s                         the Internet and will be publicly
                                                                                                          available only in hard copy form.                     standardized test procedures for
                                           (EPA’s) approval of alternative testing
                                                                                                          Publicly available docket materials are               analysis of the contaminant. This action
                                           methods for use in measuring the levels
                                                                                                          available electronically through http://              makes alternative testing methods
                                           of contaminants in drinking water and
                                                                                                          www.regulations.gov.                                  available for particular drinking water
                                           determining compliance with national
                                           primary drinking water regulations. The                        FOR FURTHER INFORMATION CONTACT: The                  contaminants beyond the testing
                                           Safe Drinking Water Act authorizes EPA                         Safe Drinking Water Hotline (800) 426–                methods currently established in the
                                           to approve the use of alternative testing                      4791 or Glynda Smith, Technical                       regulations. EPA is providing public
                                           methods through publication in the                             Support Center, Standards and Risk                    water systems required to test water
                                           Federal Register. EPA is using this                            Management Division, Office of Ground                 samples with a choice of using either a
                                           streamlined authority to make 16                               Water and Drinking Water (MS 140),                    test procedure already established in the
                                           additional methods available for                               Environmental Protection Agency, 26                   existing regulations or an alternative test
                                           analyzing drinking water samples. This                         West Martin Luther King Drive,                        procedure that has been approved in
                                           expedited approach provides public                             Cincinnati, OH 45268; telephone                       this action or in prior expedited
                                           water systems, laboratories, and                               number: (513) 569–7652; email address:                approval actions. Categories and entities
                                           primacy agencies with more timely                              smith.glynda@epa.gov.                                 that may ultimately be affected by this
                                           access to new measurement techniques                           SUPPLEMENTARY INFORMATION:                            action include:

                                                        Category                                                    Examples of potentially regulated entities                                  NAICS 1

                                           State, local, & tribal govern-             State, local and tribal governments that analyze water samples on behalf of public water systems              924110
                                             ments.                                     required to conduct such analysis; state, local and tribal governments that directly operate
                                                                                        community and non-transient non-community water systems required to monitor.
                                           Industry ...............................   Private operators of community and non-transient non-community water systems required to                      221310
                                                                                        monitor.
                                           Municipalities ......................      Municipal operators of community and non-transient non-community water systems required to                    924110
                                                                                        monitor.
                                              1 North   American Industry Classification System.


                                              This table is not intended to be                            Abbreviations and Acronyms Used in                    II. Background
                                           exhaustive, but rather provides a guide                        This Action
                                                                                                                                                                A. What is the purpose of this action?
                                           for readers regarding entities likely to be                    APHA: American Public Health Association
                                           affected by this action. This table lists                      ATP: Alternate Test Procedure                           In this action, EPA is approving 16
                                           the types of entities that EPA is now                          CFR: Code of Federal Regulations                      analytical methods for determining
                                           aware could potentially be affected by                         DPD: N,N-diethyl-p-phenylenediamine                   contaminant concentrations in drinking
                                           this action. Other types of entities not                       EPA: United States Environmental Protection           water samples collected under SDWA.
                                           listed in the table could also be                                Agency                                              Regulated parties required to sample
                                           impacted. To determine whether your                            LED: Light Emitting Diode                             and monitor may use either the testing
                                           facility is affected by this action, you                       NAICS: North American Industry                        methods already established in existing
                                           should carefully examine the                                     Classification System                               regulations or the alternative testing
                                           applicability language in the Code of                          NEMI: National Environmental Methods                  methods being approved in this action
                                           Federal Regulations (CFR) at 40 CFR                              Index                                               or in prior expedited approval actions.
                                           141.2 (definition of public water                              NTU: Nephelometric Turbidity Unit
                                                                                                                                                                The new methods are listed along with
                                           system). If you have questions regarding                       QC: Quality Control
                                                                                                                                                                other methods similarly approved
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                                           the applicability of this action to a                          SDWA: The Safe Drinking Water Act
                                                                                                                                                                through previous expedited actions in
                                                                                                          TOC: Total Organic Carbon
                                           particular entity, consult the person                                                                                40 CFR part 141, appendix A to subpart
                                                                                                          VCSB: Voluntary Consensus Standard Bodies
                                           listed in the preceding FOR FURTHER                                                                                  C and on EPA’s drinking water methods
                                           INFORMATION CONTACT section.                                                                                         Web site at https://www.epa.gov/
                                                                                                                                                                dwanalyticalmethods.



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                                           46840               Federal Register / Vol. 81, No. 138 / Tuesday, July 19, 2016 / Rules and Regulations

                                           B. What is the basis for this action?                    regulation.’’ Accordingly, this action                        International methods to the earlier
                                              When EPA determines that an                           makes these additional 16 analytical                          versions of those methods that are
                                           alternative analytical method is                         methods legally available as options for                      currently approved in 40 CFR part 141.
                                           ‘‘equally effective’’ (i.e., as effective as a           meeting EPA’s monitoring requirements.                        Changes between the earlier approved
                                           method that has already been                                This action does not add regulatory                        version and the most recent version of
                                           promulgated in the regulations), SDWA                    language, but does, for informational                         each method are summarized in Smith
                                           allows EPA to approve the use of the                     purposes, update an appendix to the                           (2015). The revisions primarily involve
                                           alternative method through publication                   regulations at 40 CFR part 141 that lists                     editorial changes (e.g., updated
                                           in the Federal Register (see Section                     all methods approved under Section                            references, definitions, terminology,
                                           1401(1) of SDWA). EPA is using this                      1401(1) of SDWA. Accordingly, while                           procedural clarifications, and
                                           streamlined approval authority to make                   this action is not a rule, it is updating                     reorganization of text). The revised
                                           16 additional methods available for                      CFR text and therefore is being                               methods are the same as the approved
                                           determining contaminant                                  published in the ‘‘Final Rules’’ section                      versions with respect to sample
                                           concentrations in drinking water                         of the Federal Register.                                      collection and handling protocols,
                                           samples collected under SDWA. EPA                        III. Summary of Approvals                                     sample preparation, analytical
                                           has determined that, for each                                                                                          methodology, and method performance
                                           contaminant or group of contaminants                       EPA is approving 16 methods that are
                                                                                                                                                                  data; thus, EPA finds they are equally
                                           listed in Section III, the additional                    equally effective relative to methods
                                                                                                                                                                  effective relative to the approved
                                           testing methods being approved in this                   previously promulgated in the
                                           action are as effective as one or more of                regulations. By means of this rule, these                     methods.
                                           the testing methods already approved in                  16 methods are added to appendix A to                            EPA is thus approving the use of the
                                           the regulations for those contaminants.                  subpart C of 40 CFR part 141.                                 following ASTM methods for the
                                           Section 1401(1) of SDWA states that the                                                                                contaminants and their respective
                                                                                                    A. Methods developed by Voluntary
                                           newly approved methods ‘‘shall be                                                                                      regulations listed in the following table:
                                                                                                    Consensus Standard Bodies (VCSB)
                                           treated as an alternative for public water
                                           systems to the quality control and                         ASTM International. EPA compared
                                           testing procedures listed in the                         the most recent versions of seven ASTM

                                                   ASTM revised version                         Approved method                                Contaminant                                   Regulation

                                           D 1253–14 (ASTM 2014a) .............        D 1253–03 (ASTM 2003a) ...........       Free Chlorine; Total Chlorine .......               40 CFR 141.74(a)(2); 40 CFR
                                                                                                                                                                                      141.131(c)(1).
                                           D   1253–14 (ASTM 2014a) .............      D   1253–03 (ASTM 2003a) ...........     Combined Chlorine .......................           40 CFR 141.131(c)(1).
                                           D   1125–14 A (ASTM 2014b) .........        D   1125–95 A (ASTM 1995) ..........     Conductivity ..................................     40 CFR 141.23(k)(1).
                                           D   511–14 A (ASTM 2014c) ...........       D   511–03 A (ASTM 2003b) ..........     Calcium; Magnesium ....................             40 CFR 141.23(k)(1).
                                           D   511–14 B (ASTM 2014c) ...........       D   511–03 B (ASTM 2003b) ..........     Calcium; Magnesium ....................             40 CFR 141.23(k)(1).
                                           D   1688–12 A (ASTM 2012a) .........        D   1688–02 A (ASTM 2002a) ........      Copper ..........................................   40 CFR 141.23(k)(1).
                                           D   1688–12 C (ASTM 2012a) .........        D   1688–02 C (ASTM 2002a) .......       Copper ..........................................   40 CFR 141.23(k)(1).
                                           D   3697–12 (ASTM 2012b) .............      D   3697–02 (ASTM 2002b) ...........     Antimony .......................................    40 CFR 141.23(k)(1).



                                              The ASTM methods are available                           The currently approved methods for                         EPA has determined that Hach Method
                                           from ASTM International, 100 Barr                        free chlorine in drinking water are listed                    10241 is equally as effective as the
                                           Harbor Drive, West Conshohocken, PA                      in the tables at 40 CFR 141.74(a)(2) and                      approved Standard Method 4500-Cl G–
                                           19428–2959 or http://www.astm.org.                       40 CFR 141.131(c)(1). One of the most                         00. The basis for this determination is
                                                                                                    widely used approved methods is                               discussed in Adams and Smith (2016).
                                           B. Methods Developed by Vendors                          Standard Method 4500-Cl G–00 (APHA                            Therefore, EPA is approving Hach
                                             1. Hach Method 10241—                                  2000a), which uses a N,N-diethyl-p-                           Method 10241 for determining free
                                           Spectrophotometric Measurement of                        phenylenediamine (DPD) indicator for                          chlorine concentrations in drinking
                                                                                                    spectrophotometric determination of                           water. Hach Method 10241 can be
                                           Free Chlorine (Cl2) in Finished Drinking
                                                                                                    residual chlorine concentrations in                           obtained from Hach Company, 5600
                                           Water (Hach Company 2015a). In Hach
                                                                                                    drinking water. The DPD methodology                           Lindbergh Drive, Loveland, Colorado
                                           Method 10241, free chlorine is
                                                                                                    can be subject to interferences                               80539. (http://www.hach.com.)
                                           converted to monochloramine by                                                                                           2. Hach Method 8026—
                                                                                                    associated with the presence of
                                           addition of an ammonia solution to a                     manganese, chloramines, and other                             Spectrophotometric Measurement of
                                           drinking water sample. In the presence                   oxidants. Hach Method 10241 is not                            Copper in Finished Drinking Water
                                           of a cyanoferrate catalyst,                              subject to such interferences.                                (Hach Company 2015c). In Hach
                                           monochloramine reacts with a                                A multi-laboratory study compared                          Method 8026, cuprous copper is
                                           substituted phenol to form an                            the performance characteristics of Hach                       measured colorimetrically by
                                           intermediate monoamine compound.                         Method 10241 to the performance                               complexation with bicinchoninic acid.
                                           The intermediate monoamine                               characteristics of the approved Standard                      The intensity in color is proportional to
                                           compound couples with excess                             Method 4500-Cl G–00. A variety of                             the copper concentration, and
                                           substituted phenol to form a green                       samples, including drinking water                             spectrophotometer measurements are
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                                           indophenol compound.                                     samples from both surface water and                           taken at 560 nm. Cupric copper present
                                           Spectrophotometric measurement of                        ground water sources, were fortified                          in samples is chemically reduced to
                                           absorbance at 655 nm (610 nm for                         with known chlorine concentrations                            cuprous copper. Metal and hardness
                                           colorimeters) is directly proportional to                and analyzed by each method. The                              interferences in samples are mitigated
                                           the concentration of free chlorine in the                results are summarized in the validation                      through the use of a chelating agent. The
                                           sample.                                                  study report (Hach Company 2015b).                            method is performed by the addition of


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                                                               Federal Register / Vol. 81, No. 138 / Tuesday, July 19, 2016 / Rules and Regulations                                        46841

                                           powder pillows containing reagents to                    process to ensure more complete                       Therefore, EPA is approving Hach
                                           the water samples.                                       oxidation.                                            Method 10267 for the analysis of TOC
                                             The currently approved methods for                       A multi-laboratory validation study                 in drinking water. Hach Method 10267
                                           the analysis of copper in drinking water                 was conducted to compare the                          can be obtained from Hach Company,
                                           are listed in the table at 40 CFR                        performance of Hach Method 10261 to                   5600 Lindbergh Drive, Loveland,
                                           141.23(k)(1). The approved methods are                   the approved Standard Method 5310                     Colorado 80539. (http://
                                           based on atomic spectroscopy                             C–00. Multiple finished drinking water                www.hach.com).
                                           technologies. Hach Method 8026                           samples drawn from both ground water                     5. Hach Method 10272—
                                           employs a spectrophotometer, and is                      and surface water sources were used in                Spectrophotometric Measurement of
                                           based on known complexation                              the validation study. Precision, accuracy             Copper in Finished Drinking Water
                                           principles and simple color/absorbance                   and sensitivity data were collected by                (Hach Company 2015i). In Hach Method
                                           measurements to determine copper                         analyzing drinking water samples                      10272, cuprous copper is measured
                                           concentrations.                                          fortified with varying concentrations of              colorimetrically by complexation with
                                             A multi-laboratory validation study                    TOC. The results are summarized in the                bicinchoninic acid. The intensity in
                                           was conducted to compare the                             validation study report (Hach Company                 color is proportional to the copper
                                           performance of Hach Method 8026 to                       2015f). EPA has determined that Hach                  concentration, and spectrophotometer
                                           EPA Method 200.7 (USEPA 1994), one                       Method 10261 is equally as effective as               measurements are taken at 560 nm.
                                           of the approved methods for the                          the approved Standard Method 5310 C–                  Cupric copper present in samples is
                                           analysis of copper in drinking water.                    00. The basis for this determination is               chemically reduced to cuprous copper.
                                           Multiple finished drinking water                         discussed in Adams and Smith (2016).                  Metal and hardness interferences in
                                           samples drawn from both ground water                     Therefore, EPA is approving Hach                      samples are mitigated through the use of
                                           and surface water sources were used in                   Method 10261 for the analysis of TOC                  a chelating agent. The method is
                                           the validation study. Precision, accuracy                in drinking water. Hach Method 10261                  performed through the use of a copper
                                           and sensitivity data were collected by                   can be obtained from Hach Company,                    Chemkey and portable analyzer.
                                           analyzing drinking water samples                         5600 Lindbergh Drive, Loveland,                          The currently approved methods for
                                           fortified with varying concentrations of                 Colorado 80539. (http://                              the analysis of copper in drinking water
                                           copper standards. The results are                        www.hach.com).                                        are listed in the table at 40 CFR
                                           summarized in the validation study                         4. Hach Method 10267—                               141.23(k)(1). The approved methods are
                                           report (Hach Company 2015d). EPA has                     Spectrophotometric Measurement of                     based on atomic spectroscopy
                                           determined that Hach Method 8026 is                      Total Organic Carbon (TOC) in Finished                technologies. Hach Method 10272 uses
                                           equally as effective as the approved EPA                 Drinking Water (Hach Company 2015g).                  a spectrophotometer, simple color/
                                           Method 200.7. The basis for this                         Hach Method 10267 is used for the                     absorbance measurements to determine
                                           determination is discussed in Adams                      determination of TOC in drinking water                copper concentrations, and incorporates
                                           and Smith (2016). Therefore, EPA is                      using acid persulfate digestion and                   portability and streamlining into the
                                           approving Hach Method 8026 for the                       visible spectrum spectrophotometry. In                analysis.
                                           analysis of copper in drinking water.                    this method, samples are oxidized using                  A multi-laboratory validation study
                                           Hach Method 8026 can be obtained from                    acid persulfate digestions to convert                 was conducted to compare the
                                           Hach Company, 5600 Lindbergh Drive,                      TOC into carbon dioxide. The generated                performance of Hach Method 10272 to
                                           Loveland, Colorado 80539. (http://                       carbon dioxide is passed through a gas-               EPA Method 200.7 (USEPA 1994), one
                                           www.hach.com).                                           permeable membrane into an indicator                  of the approved methods for the
                                             3. Hach Method 10261—Total Organic                     solution that is measured                             analysis of copper in drinking water.
                                           Carbon in Finished Drinking Water by                     spectrophotometrically at 435 nm. Hach                Multiple finished drinking water
                                           Catalyzed Ozone Hydroxyl Radical                         Method 10267 uses pre-packaged                        samples drawn from both ground water
                                           Oxidation Infrared Analysis (Hach                        reagents to simplify sample preparation               and surface water sources were used in
                                           Company 2015e). Hach Method 10261 is                     and quickly perform the analysis.                     the validation study. Precision, accuracy
                                           a method for the determination of total                  Interfering inorganic carbon is removed               and sensitivity data were collected by
                                           organic carbon (TOC) in drinking water                   from the sample prior to digestion by                 analyzing drinking water samples
                                           using an advanced oxidation process                      acidification and agitation.                          fortified with varying concentrations of
                                           and non-dispersive infrared                                The currently approved methods for                  copper standards. The results are
                                           spectroscopy. In this method, ozone and                  the analysis of TOC in drinking water                 summarized in the validation study
                                           a base are added to water to produce                     are listed in 40 CFR 141.131(d)(3). A                 report (Hach Company 2015j). EPA has
                                           hydroxyl radicals. The hydroxyl                          multi-laboratory validation study was                 determined that Hach Method 10272 is
                                           radicals oxidize organic carbon to                       conducted to compare the performance                  equally as effective as the approved EPA
                                           produce carbon dioxide and sodium                        of Hach Method 10267 to the approved                  Method 200.7. The basis for this
                                           oxalate. The sodium oxalate is further                   Standard Method 5310 C–00 (APHA                       determination is discussed in Adams
                                           oxidized to carbon dioxide using                         200b). Multiple finished drinking water               and Smith (2016). Therefore, EPA is
                                           acidification and a manganese catalyst.                  samples drawn from both ground water                  approving Hach Method 10272 for the
                                           The carbon dioxide produced by both                      and surface water sources were used in                analysis of copper in drinking water.
                                           oxidation processes is then measured                     the validation study. Precision, accuracy             Hach Method 10272 can be obtained
                                           using non-dispersive infrared                            and sensitivity data were collected by                from Hach Company, 5600 Lindbergh
                                           spectroscopy.                                            analyzing drinking water samples                      Drive, Loveland, Colorado 80539.
                                             The currently approved methods for                     fortified with varying concentrations of              (http://www.hach.com).
                                           the analysis of TOC in drinking water                    TOC. The results are summarized in the                   6. Hach Method 10258—
ehiers on DSK5VPTVN1PROD with RULES




                                           are listed in 40 CFR 141.131(d)(3). The                  validation study report (Hach Company                 Determination of Turbidity by 360°
                                           approved oxidation method, Standard                      2015h). EPA has determined that Hach                  Nephelometry (Hach Company 2016). In
                                           Method 5310 C–00 (APHA 2000b), may                       Method 10267 is equally as effective as               Hach Method 10258 turbidity is
                                           not completely oxidize certain organic                   the approved Standard Method 5310                     determined in conventional-filtered and
                                           compounds. Hach Method 10261 uses a                      C–00. The basis for this determination is             membrane-filtered treated drinking
                                           more efficient advanced oxidation                        discussed in Adams and Smith (2016).                  water using a 360 degree nephelometer.


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                                           46842               Federal Register / Vol. 81, No. 138 / Tuesday, July 19, 2016 / Rules and Regulations

                                           In this method, a non-incandescent light                 nicotinamide adenine dinucleotide as a                to form an intensely blue complex that
                                           source operates at a wavelength of 660                   reductant in a buffer with a near neutral             can be measured spectrophotometrically
                                           + 30 nm and light scattered by the                       pH. The combined nitrite (both the                    at 880 nm.
                                           sample is collected and detected at an                   original and reduced nitrate) is reacted                 The currently approved methods for
                                           angle 90 degrees to the incident light,                  with sulfanilamide and N-(1-napthyl)                  the analysis of orthophosphate in
                                           360 degrees around the sample vial.                      ethylenediamine dihydrochloride to                    drinking water are listed in 40 CFR
                                           This design offers improved sensitivity                  produce a chromophore. The combined                   141.23(k)(1). Standard Methods 4500–P
                                           (minimum quantitation limit of 0.0005                    nitrite concentration is then measured                E (APHA, 1995) is an approved method
                                           Nephelometric Turbidity Units (NTU)                      spectrophotometrically at ∼540 nm. The                that uses ascorbic acid to reduce reacted
                                           and resolution (0.0001 NTU) relative to                  method entails the use of a discrete                  orthophosphate into a complex that can
                                           the approved methods.                                    analyzer that incorporates a                          be measured spectrophotometrically.
                                              The currently approved methods for                    spectrophotometric detector.                          The Thermo Fisher orthophosphate
                                           the analysis of turbidity in treated                       The currently approved methods for                  method incorporates an automated
                                           drinking water are listed in the                         the analysis of nitrate and nitrite in                discrete analyzer, which minimizes the
                                           regulations at 40 CFR 141.74(a)(1). A                    drinking water are listed in 40 CFR                   use of chemical reagents, generation of
                                           multi-facility validation study was                      141.23(k)(1). The approved EPA Method                 waste and human handling errors.
                                           conducted to compare the performance                     353.2 (USEPA 1993a) uses cadmium to                      A validation study was conducted to
                                           of Hach Method 10258 to the approved                     reduce nitrate to nitrite and                         compare the performance of the
                                           Hach FilterTrak Method 10133 (Hach                       subsequently measures the combined                    automated Thermo Fisher
                                           Company 2000) for the analysis of                        nitrite colorimetrically. The NECi                    orthophosphate discrete analyzer
                                           turbidity in treated drinking water.                     nitrate reductase method provides an                  method to the approved Standard
                                           Seven public drinking water facilities                   environmentally friendly approach to                  Method 4500–P E. Multiple finished
                                           participated in the study. Three                         nitrate-nitrogen analysis by eliminating              drinking water samples drawn from
                                           facilities produced treated water using                  the use of toxic cadmium and requires                 both ground water and surface water
                                           both conventional-filtration and                         only a fraction of the sample volume                  sources were used in the validation
                                           membrane-filtration, two facilities                      used in the approved EPA method.                      study. Precision, accuracy and
                                           produced only conventional-filtration                      A multi-laboratory validation study                 sensitivity data were collected by
                                           treated water, and two facilities                        was conducted to compare the                          analyzing drinking water samples
                                           produced only membrane-filtration                        performance of the NECi nitrate                       fortified with varying concentrations of
                                           treated water. Source waters                             reductase method to the approved EPA                  orthophosphate standards. The results
                                           encompassed both surface waters and                      Method 353.2. Multiple finished                       are summarized in the validation study
                                           ground waters under the direct                           drinking water samples drawn from                     report (Thermo Fisher 2016b). EPA has
                                           influence of surface water. Turbidity                    both ground water and surface water                   determined that the Thermo Fisher
                                           comparison data were collected at each                   sources were used in the validation                   discrete analyzer method for
                                           facility by operating the instrument                     study. Precision, accuracy and                        orthophosphate is equally as effective as
                                           collecting the Hach Method 10258                         sensitivity data were collected by                    the approved Standard Method 4500–P
                                           turbidity data in parallel with an                       analyzing drinking water samples                      E. Therefore, EPA is approving the
                                           instrument collecting turbidity data                     fortified with varying concentrations of              Thermo Fisher method for the analysis
                                           using the approved Hach FilterTrack                      nitrate standards. The results are                    of orthophosphate in treated drinking
                                           Method 10133. Precision and accuracy                     summarized in the validation study                    water. The basis for this determination
                                           (based on recovery of matrix spike                       report (NECi 2016b). EPA has                          is discussed in Adams (2016). The
                                           injections) data were collected over a                   determined that the NECi nitrate                      Thermo Fisher discrete analyzer method
                                           range of spike levels (0.0015–0.500                      reductase method is equally as effective              for orthophosphate can be obtained
                                           NTU) and calibration verification data                   as the approved EPA Method 353.2. The                 from Thermo Fisher Scientific, Ratastie
                                           were collected from each facility. The                   basis for this determination is discussed             2, 01620 Vantaa, Finland.
                                           results are summarized in the validation                 in Adams and Wendelken (2016).                           9. Mitchell Method M5331, Revision
                                           study report (Hach Company 2014). EPA                    Therefore, EPA is approving the NECi                  1.2—Determination of Turbidity by LED
                                           has determined that Hach Method                          nitrate reductase method for the                      or Laser Nephelometry (Mitchell 2016).
                                           10258 is equally as effective as the                     analysis of nitrate and nitrite in                    Mitchell Method M5331, Revision 1.1
                                           approved Hach FilterTrak Method                          drinking water. The NECi nitrate                      (Mitchell 2009) was approved for the
                                           10133. The basis for this determination                  reductase method can be obtained from                 determination of turbidity in drinking
                                           is discussed in Adams and Smith                          the Nitrate Elimination Company, Inc.                 water by light emitting diode (LED)
                                           (2016). Therefore, EPA is approving                      (NECi) at Superior Enzymes, Inc., 334                 nephelometry in the August 2009
                                           Hach Method 10258 for the analysis of                    Hecla St., Lake Linden, Michigan 49945.               expedited methods approval action
                                           turbidity in treated drinking water.                       8. Thermo Fisher Scientific Drinking                (USEPA 2009). The currently approved
                                           Hach Method 10258 can be obtained                        Water Orthophosphate Method for                       methods for turbidity are listed in 40
                                           from Hach Company, 5600 Lindbergh                        Thermo Scientific Gallery Discrete                    CFR 141.74(a)(1) and different sources,
                                           Drive, Loveland, Colorado 80539.                         Analyzer (Thermo Fisher 2016a). The                   including lasers, have been approved.
                                           (http://www.hach.com).                                   Thermo Fisher orthophosphate drinking                 The Mitchell Method M5331 has been
                                              7. Nitrate Elimination Company, Inc.                  water method employing Thermo                         updated to incorporate the option of
                                           (NECi)—Method for Nitrate Reductase                      Scientific Gallery discrete analyzers is              using a solid-state laser in place of a
                                           Nitrate-Nitrogen Analysis of Drinking                    used for the colorimetric determination               LED as the light source for the
                                           Water (NECi 2016a). The NECi nitrate                     of orthophosphate in drinking water. In               turbidimeter. The vendor cites multiple
ehiers on DSK5VPTVN1PROD with RULES




                                           reductase method is used for the                         this method, orthophosphate is reacted                advantages associated with the use of
                                           determination of nitrate plus nitrite (as                with ammonium molybdate and                           lasers relative to LEDs (Mitchell 2015).
                                           nitrogen) in drinking water. In this                     antimony potassium tartrate in an acidic              Mitchell Method M5331, Revision 1.1
                                           method, a eukaryotic nitrate reductase is                medium to form an antimony-phospho-                   specifies a light source of 525 ± 15 nm,
                                           used to catalyze the conversion of                       molybdate complex. The complex is                     and now lasers at 520 nm and 532 nm
                                           nitrate to nitrite in the presence of                    subsequently reduced by ascorbic acid                 are readily available. In addition to


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                                                               Federal Register / Vol. 81, No. 138 / Tuesday, July 19, 2016 / Rules and Regulations                                          46843

                                           meeting the specified wavelength range,                  American Public Health Association (APHA).            Hach Company. 2000. Hach FilterTrak
                                           solid-state lasers can offer longer source                  2000a. Standard Method 4500–Cl G–00,                  Method 10133—Determination of
                                           lifetimes, greater stability, and improved                  Chlorine (Residual)—DPD Colorimetric                  Turbidity by Laser Nephelometry.
                                                                                                       Method. Approved by Standard Methods                  January 2000. Revision 2.0. 5600
                                           stray light rejection. The updated
                                                                                                       Committee 2000. Standard Methods                      Lindbergh Drive, Loveland, Colorado
                                           method is the same as the approved                          Online (Available at http://                          80539. (Available at http://
                                           Mitchell Method M5331, Revision 1.1                         www.standardmethods.org).                             www.hach.com.)
                                           relative to the divergence of the light                  American Public Health Association (APHA).            Hach Company. 2014. Validation Study
                                           source measurement area, the detector,                      2000b. Standard Method 5310 C–00,                     Report for Hach Method 10258—
                                           and all other instrumental features. EPA                    Total Organic Carbon (TOC)—Persulfate-                Measurement of Turbidity in Drinking
                                           has determined that the updated                             Ultraviolet or Heated Persulfate                      Water by 360 Degree Nephelometry.
                                           method is equally as effective as the                       Oxidation Method. Approved by                         December 2014. 5600 Lindbergh Drive,
                                           promulgated EPA Method 180.1                                Standard Methods Committee 2000.                      Loveland, Colorado 80539. (Available at
                                                                                                       Standard Methods Online (Available at                 http://www.regulations.gov; docket ID
                                           (USEPA 1993b), which established the
                                                                                                       http://www.standardmethods.org).                      No. EPA–HQ–OW–2016–0281.)
                                           criteria for nephelometric determination                 ASTM International. 1995. ASTM D 1125–95              Hach Company. 2015a. Hach Method
                                           of turbidity. The basis for this                            A. Standard Test Methods for Electrical               10241—Spectrophotometric
                                           determination is discussed in                               Conductivity and Resistivity of Water.                Measurement of Free Chlorine (Cl2) in
                                           Wendelken and Smith (2016).                                 ASTM International, 100 Barr Harbor                   Finished Drinking Water. November
                                           Therefore, EPA is approving Mitchell                        Drive, West Conshohocken, PA 19428–                   2015. Revision 1.2. 5600 Lindbergh
                                           Method M5331, Revision 1.2 for the                          2959. (Available at http://www.astm.org.)             Drive, Loveland, Colorado 80539.
                                           determination of turbidity in drinking                   ASTM International. 2002a. ASTM D 1688–                  (Available at http://www.hach.com.)
                                           water. Mitchell Method M5331,                               02 A, C. Standard Test Methods for                 Hach Company. 2015b. Validation Study
                                           Revision 1.2 can be obtained from Leck                      Copper in Water. ASTM International,                  Report for Hach Method 10241—
                                                                                                       100 Barr Harbor Drive, West                           Spectrophotometric Measurement of
                                           Mitchell, Ph.D., PE, 656 Independence                       Conshohocken, PA 19428–2959.                          Free Chlorine in Drinking Water.
                                           Valley Drive, Grand Junction, Colorado                      (Available at http://www.astm.org.)                   November 2015. 5600 Lindbergh Drive,
                                           81507.                                                   ASTM International. 2002b. ASTM D 3697–                  Loveland, Colorado 80539. (Available at
                                           IV. Statutory and Executive Order                           02. Standard Test Method for Antimony                 http://www.regulations.gov; docket ID
                                                                                                       in Water. ASTM International, 100 Barr                No. EPA–HQ–OW–2016–0281.)
                                           Reviews
                                                                                                       Harbor Drive, West Conshohocken, PA                Hach Company. 2015c. Hach Method 8026—
                                              As noted in Section II, under the                        19428–2959. (Available at http://                     Spectrophotometric Measurement of
                                           terms of SDWA Section 1401(1), this                         www.astm.org.)                                        Copper in Finished Drinking Water.
                                           streamlined method approval action is                    ASTM International. 2003a. ASTM D 1253–                  December 2015. Revision 1.2. 5600
                                           not a rule. Accordingly, the                                03. Standard Test Method for Residual                 Lindbergh Drive, Loveland, Colorado
                                           Congressional Review Act, 5 U.S.C. 801                      Chlorine in Water. ASTM International,                80539. (Available at http://
                                                                                                       100 Barr Harbor Drive, West                           www.hach.com.)
                                           et seq., as added by the Small Business
                                                                                                       Conshohocken, PA 19428–2959.                       Hach Company. 2015d. Validation Study
                                           Regulatory Enforcement Fairness Act of                      (Available at http://www.astm.org.)                   Report for Hach Method 8026—
                                           1996, does not apply because this action                 ASTM International. 2003b. ASTM D 511–03                 Spectrophotometric Measurement of
                                           is not a rule for purposes of 5 U.S.C.                      A, B. Standard Test Methods for Calcium               Copper in Drinking Water. November
                                           804(3). Similarly, this action is not                       and Magnesium in Water. ASTM                          2015. 5600 Lindbergh Drive, Loveland,
                                           subject to the Regulatory Flexibility Act                   International, 100 Barr Harbor Drive,                 Colorado 80539. (Available at http://
                                           because it is not subject to notice and                     West Conshohocken, PA 19428–2959.                     www.regulations.gov; docket ID No.
                                           comment requirements under the                              (Available at http://www.astm.org.)                   EPA–HQ–OW–2016–0281.)
                                           Administrative Procedure Act or any                      ASTM International. 2012a. ASTM D 1688–               Hach Company. 2015e. Hach Method
                                                                                                       12 A, C. Standard Test Methods for                    10261—Total Organic Carbon in
                                           other statute. In addition, because this
                                                                                                       Copper in Water. ASTM International,                  Finished Drinking Water by Catalyzed
                                           approval action is not a rule but simply                    100 Barr Harbor Drive, West                           Ozone Hydroxyl Radical Oxidation
                                           makes alternative testing methods                           Conshohocken, PA 19428–2959.                          Infrared Analysis. December 2015.
                                           available as options for monitoring                         (Available at http://www.astm.org.)                   Revision 1.2. 5600 Lindbergh Drive,
                                           under SDWA, EPA has concluded that                       ASTM International. 2012b. ASTM D 3697–                  Loveland, Colorado 80539. (Available at
                                           other statutes and executive orders                         12. Standard Test Method for Antimony                 http://www.hach.com.)
                                           generally applicable to rulemaking do                       in Water. ASTM International, 100 Barr             Hach Company. 2015f. Validation Study
                                           not apply to this approval action.                          Harbor Drive, West Conshohocken, PA                   Report for Hach Method 10261—Total
                                                                                                       19428–2959. (Available at http://                     Organic Carbon in Finished Drinking
                                           V. References                                               www.astm.org.)                                        Water by Catalyzed Ozone Hydroxyl
                                           Adams. 2016. Memo to the record describing               ASTM International. 2014a. ASTM D 1253–                  Radical Oxidation Infrared Analysis.
                                              basis for expedited approval of Thermo                   14. Standard Test Method for Residual                 December 2015. 5600 Lindbergh Drive,
                                              Fisher discrete analyzer method for                      Chlorine in Water. ASTM International,                Loveland, Colorado 80539. (Available at
                                              orthophosphate. February 18, 2016.                       100 Barr Harbor Drive, West                           http://www.regulations.gov; docket ID
                                           Adams and Smith. 2016. Memo to the record                   Conshohocken, PA 19428–2959.                          No. EPA–HQ–OW–2016–0281.)
                                              describing basis for expedited approval                  (Available at http://www.astm.org.)                Hach Company. 2015g. Hach Method
                                              of Hach Company methods. February 29,                 ASTM International. 2014b. ASTM D 1125–                  10267—Spectrophotometric
                                              2016.                                                    14 A. Standard Test Methods for                       Measurement of Total Organic Carbon
                                           Adams and Wendelken. 2016. Memo to the                      Electrical Conductivity and Resistivity of            (TOC) in Finished Drinking Water.
                                              record describing basis for expedited                    Water. ASTM International, 100 Barr                   December 2015. Revision 1.2. 5600
                                              approval of Nitrate Elimination                          Harbor Drive, West Conshohocken, PA                   Lindbergh Drive, Loveland, Colorado
                                              Company Inc. (NECi) nitrate reductase                    19428–2959. (Available at http://                     80539. (Available at http://
ehiers on DSK5VPTVN1PROD with RULES




                                              method. February 9, 2016.                                www.astm.org.)                                        www.hach.com.)
                                           American Public Health Association (APHA).               ASTM International. 2014c. ASTM D 511–14              Hach Company. 2015h. Validation Study
                                              1995. 19th Edition of Standard Methods                   A, B. Standard Test Methods for Calcium               Report for Hach Method 10267—
                                              for the Examination of Water and                         and Magnesium in Water. ASTM                          Spectrophotometric Measurement of
                                              Wastewater, American Public Health                       International, 100 Barr Harbor Drive,                 Total Organic Carbon (TOC) in Finished
                                              Association, 800 I Street NW.,                           West Conshohocken, PA 19428–2959.                     Drinking Water. December 2015. 5600
                                              Washington, DC 20001–3710.                               (Available at http://www.astm.org.)                   Lindbergh Drive, Loveland, Colorado



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                                           46844                      Federal Register / Vol. 81, No. 138 / Tuesday, July 19, 2016 / Rules and Regulations

                                               80539. (Available at http://                                    Linden, Michigan 49945. (Available at                                              PART 141—NATIONAL PRIMARY
                                               www.regulations.gov; docket ID No.                              http://www.regulations.gov; docket ID                                              DRINKING WATER REGULATIONS
                                               EPA–HQ–OW–2016–0281.)                                           No. EPA–HQ–OW–2016–0281.)
                                           Hach Company. 2015i. Hach Method 10272—                         Smith, G. 2015. Memo to the record
                                               Spectrophotometric Measurement of                               describing basis for expedited approval                                            ■ 1. The authority citation for part 141
                                               Copper in Finished Drinking Water.                              of updated methods from ASTM                                                       continues to read as follows:
                                               December 2015. Revision 1.2. 5600                               International. December 30, 2015.
                                                                                                           Thermo Fisher. 2016a. Thermo Fisher                                                       Authority: 42 U.S.C. 300f, 300g–1, 300g–
                                               Lindbergh Drive, Loveland, Colorado
                                               80539. (Available at http://                                    Scientific Drinking Water                                                          2, 300g–3, 300g–4, 300g–5, 300g–6, 300j–4,
                                               www.hach.com.)                                                  Orthophosphate Method for Thermo                                                   300j–9, and 300j–11.
                                           Hach Company. 2015j. Validation Study                               Scientific Gallery Discrete Analyzer.
                                                                                                               February 2016. Revision 5. Thermo
                                                                                                                                                                                                  ■  2. Appendix A to subpart c of part 141
                                               Report for Hach Method 10272—
                                               Spectrophotometric Measurement of                               Fisher Scientific, Ratastie 2, 01620                                               is amended as follows:
                                               Copper in Finished Drinking Water.                              Vantaa, Finland. (Available at http://                                             ■ a. By revising entries for ‘‘Antimony,’’
                                               December 2015. 5600 Lindbergh Drive,                            www.regulations.gov; docket ID No.                                                 ‘‘Calcium,’’ ‘‘Copper,’’ ‘‘Conductivity,’’
                                               Loveland, Colorado 80539. (Available at                         EPA–HQ–OW–2016–0281.)
                                                                                                           Thermo Fisher. 2016b. Validation Study                                                 ‘‘Magnesium,’’ ‘‘Nitrate,’’ ‘‘Nitrite,’’ and
                                               http://www.regulations.gov; docket ID
                                                                                                               Report for Thermo Fisher                                                           ‘‘Orthophosphate,’’ in the table entitled
                                               No. EPA–HQ–OW–2016–0281.)
                                           Hach Company. 2016. Hach Method 10258—                              Orthophosphate Discrete Analyzer                                                   ‘‘ALTERNATIVE TESTING METHODS
                                               Determination of Turbidity by 360°                              Method. February 2016. Thermo Fisher                                               FOR CONTAMINANTS LISTED AT 40
                                               Nephelometry. January 2016. 5600                                Scientific, Ratastie 2, 01620 Vantaa,                                              CFR 141.23(k)(1).’’
                                               Lindbergh Drive, Loveland, Colorado                             Finland. (Available at http://
                                                                                                               www.regulations.gov; docket ID No.                                                 ■ b. By revising the entry for
                                               80539. (Available at http://
                                               www.hach.com.)                                                  EPA–HQ–OW–2016–0281.)                                                              ‘‘Turbidity’’ in the table entitled
                                           Mitchell, L. and Mitchell, P. 2009. Mitchell                    USEPA. 1993a. EPA Method 353.2. Revision                                               ‘‘ALTERNATIVE TESTING METHODS
                                               Method M5331—Determination of                                   2.0, ‘‘Determination of Nitrate-Nitrite                                            FOR CONTAMINANTS LISTED AT 40
                                                                                                               Nitrogen by Automated Colorimetry,’’
                                               Turbidity by LED Nephelometry. March
                                                                                                               August 1993. (Available at https://
                                                                                                                                                                                                  CFR 141.74(a)(1).’’
                                               2009. Revision 1.1. Leck Mitchell, Ph.D.,
                                                                                                               www.nemi.gov.)                                                                     ■ c. By revising entries for ‘‘Free
                                               PE, 656 Independence Valley Drive,
                                                                                                           USEPA. 1993b. EPA Method 180.1. Revision                                               Chlorine’’ and ‘‘Total Chlorine’’ in the
                                               Grand Junction, CO 81507. (Available at
                                                                                                               2.0, ‘‘Determination of Turbidity by                                               table entitled ‘‘ALTERNATIVE
                                               http://www.regulations.gov; docket ID                           Nephelometry,’’ August 1993. (Available
                                               No. EPA–HQ–OW–2016–0281.)                                       at https://www.nemi.gov.)                                                          TESTING METHODS FOR
                                           Mitchell, L. 2015. Mitchell ATP Submission                      USEPA. 1994. EPA Method 200.7. Revision                                                DISINFECTANT RESIDUALS LISTED
                                               with Justification for Revision to                              4.4, ‘‘Determination of Metals and Trace                                           AT 40 CFR 141.74(a)(2).’’
                                               Mitchell Method M5331, Revision 1.1.                            Elements in Water and Wastes by
                                               September 2015. Leck Mitchell, Ph.D.,                                                                                                              ■ d. By revising the entries for ‘‘Free
                                                                                                               Inductively Coupled Plasma-Atomic
                                               PE, 656 Independence Valley Drive,                              Emission Spectrometry,’’ May 1994.                                                 Chlorine’’, ‘‘Combined Chlorine,’’ and
                                               Grand Junction, CO 81507. (Available at                         (Available at https://www.nemi.gov.)                                               ‘‘Total Chlorine’’ in the table entitled
                                               http://www.regulations.gov; docket ID                       USEPA. 2009. Expedited Approval of                                                     ‘‘ALTERNATIVE TESTING METHODS
                                               No. EPA–HQ–OW–2016–0281.)                                       Alternative Test Procedures for the                                                FOR DISINFECTANT RESIDUALS
                                           Mitchell, L. and Mitchell, P. 2016. Mitchell                        Analysis of Contaminants Under the Safe
                                               Method M5331—Determination of
                                                                                                                                                                                                  LISTED AT 40 CFR 141.131(c)(1).’’
                                                                                                               Drinking Water Act; Analysis and
                                               Turbidity by LED or Laser                                       Sampling Procedures, 74 FR 38348,                                                  ■ e. By revising the entire table entitled
                                               Nephelometry. February 2016. Revision                           August 3, 2009.                                                                    ‘‘ALTERNATIVE TESTING METHODS
                                               1.2. Leck Mitchell, Ph.D., PE, 656                          Wendelken and Smith. 2016. Memo to record                                              FOR PARAMETERS LISTED AT 40 CFR
                                               Independence Valley Drive, Grand                                describing basis for expedited approval                                            141.131(d).’’
                                               Junction, CO 81507. (Available at http://                       of Mitchell Method M5331, Revision 1.2.
                                               www.regulations.gov; docket ID No.                              February 24, 2016.                                                                 ■ f. By revising footnotes 2, 9, 14, 16, 18,
                                               EPA–HQ–OW–2016–0281.)                                                                                                                              19, 24–27, 29, and 33.
                                           Nitrate Elimination Company, Inc. (NECi).                       List of Subjects in 40 CFR Part 141
                                                                                                                                                                                                  ■ g. By adding footnotes 34–42 to the
                                               2016a. Method for Nitrate Reductase                           Environmental protection, Chemicals,
                                               Nitrate-Nitrogen Analysis of Drinking                                                                                                              table.
                                                                                                           Indians-lands, Intergovernmental
                                               Water. February 2016. Version 1.0.                          relations, Reporting and recordkeeping                                                    The revisions and additions read as
                                               Revision 2.0. Superior Enzymes, Inc.,                                                                                                              follows:
                                                                                                           requirements, Water supply.
                                               334 Hecla Street, Lake Linden, Michigan
                                               49945. (Available at http://                                  Dated: July 7, 2016.                                                                 Appendix A to Subpart C of Part 141—
                                               www.regulations.gov; docket ID No.                          Peter Grevatt,                                                                         Alternative Testing Methods Approved
                                               EPA–HQ–OW–2016–0281.)                                       Director, Office of Ground Water and Drinking                                          for Analyses Under the Safe Drinking
                                           Nitrate Elimination Company, Inc. (NECi).                       Water.
                                               2016b. Validation Study Report for NECi                                                                                                            Water Act
                                               Nitrate-Reductase Nitrate plus Nitrite                        For the reasons stated in the                                                        *          *          *           *        *
                                               Nitrogen Method. January 2016. Superior                     preamble, 40 CFR part 141 is amended
                                               Enzymes, Inc., 334 Hecla Street, Lake                       as follows:
                                                                          ALTERNATIVE TESTING METHODS FOR CONTAMINANTS LISTED AT 40 CFR 141.23(k)(1)
                                                                                                                                      SM 21st Edi-                 SM 22nd
                                                   Contaminant                         Methodology          EPA method                                                                    SM Online 3                   ASTM 4                       Other
                                                                                                                                         tion 1                    Edition 28
ehiers on DSK5VPTVN1PROD with RULES




                                                                    *                       *                      *                                *                               *                               *                            *
                                           Antimony ..........................   Hydride–Atomic Absorp-    .......................   .......................   .......................   .......................   D 3697–07,
                                                                                   tion.                                                                                                                              –12.
                                                                                 Atomic Absorption; Fur-   .......................   3113 B ..........         3113 B ..........         3113 B–04,                .......................
                                                                                   nace.                                                                                                   B–10.




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                                                                            Federal Register / Vol. 81, No. 138 / Tuesday, July 19, 2016 / Rules and Regulations                                                                                                              46845

                                                                 ALTERNATIVE TESTING METHODS FOR CONTAMINANTS LISTED AT 40 CFR 141.23(k)(1)—Continued
                                                                                                                                                     SM 21st Edi-                 SM 22nd                 SM Online 3                  ASTM 4
                                                     Contaminant                             Methodology                   EPA method                                                                                                                                 Other
                                                                                                                                                        tion 1                    Edition 28

                                                                                     Axially viewed inductively           200.5, Revi-              .......................   .......................   .......................   .......................
                                                                                       coupled plasma-atomic                sion 4.2.2.
                                                                                       emission spectrometry
                                                                                       (AVICP–AES).

                                                                     *                          *                                 *                        *                             *                                         *                             *
                                           Calcium ............................      EDTA Titrimetric .............       .......................   3500–Ca B ...             3500–Ca B ...             .......................   D 511–09,
                                                                                                                                                                                                                                     –14 A.
                                                                                     Atomic Absorption; Direct            .......................   3111 B ..........         3111 B ..........         .......................   D 511–90,
                                                                                       Aspiration.                                                                                                                                   –14 B.
                                                                                     Inductively Coupled Plas-            .......................   3120 B ..........         3120 B ..........         .......................   .......................
                                                                                       ma.
                                                                                     Axially viewed inductively           200.5, Revi-              .......................   .......................   .......................   .......................
                                                                                       coupled plasma–atomic                sion 4.2.2.
                                                                                       emission spectrometry
                                                                                       (AVICP–AES).
                                                                                     Ion Chromatography .......           .......................   .......................   .......................   .......................   D 6919–09 ....

                                                                     *                            *                               *                          *                               *                                     *                             *
                                           Copper .............................      Atomic Absorption; Fur-              .......................   3113 B ..........         3113 B ..........         3113 B–04,                D 1688–07,
                                                                                       nace.                                                                                                               B–10.                     –12 C.
                                                                                     Atomic Absorption; Direct            .......................   3111 B ..........         3111 B ..........         .......................   D 1688–07,
                                                                                       Aspiration.                                                                                                                                   –12 A.
                                                                                     Inductively Coupled Plas-            .......................   3120 B ..........         3120 B ..........         .......................   .......................
                                                                                       ma.
                                                                                     Axially viewed inductively           200.5, Revi-              .......................   .......................   .......................   .......................
                                                                                       coupled plasma–atomic                sion 4.2.2.
                                                                                       emission spectrometry
                                                                                       (AVICP–AES).
                                                                                     Colorimetric .....................   .......................   .......................   .......................   .......................   .......................   Hach Method 8026 35
                                                                                                                                                                                                                                                             Hach Method 10272.36
                                           Conductivity .....................        Conductance ...................      .......................   2510 B ..........         2510 B ..........         .......................   D 1125–14 A

                                                                 *                              *                                 *                          *                               *                                     *                             *
                                           Magnesium ......................          Atomic Absorption ...........        .......................   3111 B ..........         3111 B ..........         .......................   D 511–09,
                                                                                                                                                                                                                                     ¥14 B.
                                                                                     Inductively Coupled Plas-            .......................   3120 B ..........         3120 B ..........         .......................   .......................
                                                                                       ma.
                                                                                     Complexation Titrimetric             .......................   3500–Mg B ...             3500–Mg B ...             .......................   D 511–09,
                                                                                       Methods.                                                                                                                                      –14 A.
                                                                                     Axially viewed inductively           200.5, Revi-              .......................   .......................   .......................   .......................
                                                                                       coupled plasma-atomic                sion 4.2.2.
                                                                                       emission spectrometry
                                                                                       (AVICP–AES).
                                                                                     Ion Chromatography .......           .......................   .......................   .......................   .......................   D 6919–09 ....

                                                                       *                         *                                *                                *                               *                               *                             *
                                           Nitrate ..............................    Ion Chromatography .......           .......................   4110 B ..........         4110 B ..........         .......................   D 4327–11 ....
                                                                                     Automated Cadmium Re-                .......................   4500–NO3                  4500–NO3                  .......................   .......................
                                                                                       duction.                                                        F.                        F.
                                                                                     Manual Cadmium Reduc-                .......................   4500–NO3                  4500–NO3                  .......................   .......................
                                                                                       tion.                                                           E.                        E.
                                                                                     Ion Selective Electrode ...          .......................   4500–NO3                  4500–NO3                  .......................   .......................
                                                                                                                                                       D.                        D.
                                                                                     Reduction/Colorimetric ....          .......................   .......................   .......................   .......................   .......................   Systea Easy (1-Rea-
                                                                                                                                                                                                                                                              gent) 8 NECi Nitrate-
                                                                                                                                                                                                                                                              Reductase.40
                                                                                     Colorimetric; Direct .........       .......................   .......................   .......................   .......................   .......................   Hach TNTplus TM 835/
                                                                                                                                                                                                                                                              836 Method 10206.23
                                           Nitrite ...............................   Ion Chromatography .......           .......................   4110 B ..........         4110 B ..........         .......................   D 4327–11 ....
                                                                                     Automated Cadmium Re-                .......................   4500–NO3                  4500–NO3                  .......................   .......................
                                                                                       duction.                                                        F.                        F.
                                                                                     Manual Cadmium Reduc-                .......................   4500–NO3                  4500–NO3                  .......................   .......................
                                                                                       tion.                                                           E.                        E.
                                                                                     Spectrophotometric .........         .......................   4500–NO2                  4500–NO2                  .......................   .......................
                                                                                                                                                       B.                        B.
                                                                                     Reduction/Colorimetric ....          .......................   .......................   .......................   .......................   .......................   Systea Easy (1-Rea-
                                                                                                                                                                                                                                                              gent) 8 NECi Nitrate-
                                                                                                                                                                                                                                                              Reductase.40
                                           Orthophosphate ...............            Ion Chromatography .......           .......................   4110 B ..........         4110 B ..........         .......................   D 4327–11 ....
                                                                                     Colorimetric, ascorbic               .......................   4500–P E ......           4500–P E ......           4500–P E–99               .......................
                                                                                       acid, single reagent.
ehiers on DSK5VPTVN1PROD with RULES




                                                                                     Colorimetric, Automated,             .......................   4500–P F ......           4500–P F ......           4500–P F–99               .......................   Thermo-Fisher Discrete
                                                                                       Ascorbic Acid.                                                                                                                                                         Analyzer.41

                                                                        *                            *                           *                                *                                *                               *                             *



                                           *         *          *           *        *


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                                           46846                       Federal Register / Vol. 81, No. 138 / Tuesday, July 19, 2016 / Rules and Regulations

                                                                           ALTERNATIVE TESTING METHODS FOR CONTAMINANTS LISTED AT 40 CFR 141.74(a)(1)
                                                    Organism                              Methodology                      SM 21st Edition 1                       SM 22nd Edition 28                             SM Online 3                                 Other


                                                     *                              *                   *                                *                              *                                                                *                            *
                                           Turbidity .....................    Nephelometric Method ... 2130 B ................... 2130 B ...................
                                                                              Laser Nephelometry (on- ................................ ................................                                    ................................       Mitchell M5271,10 Mitch-
                                                                                line).                                                                                                                                                              ell M5331, Rev. 1.2.42
                                                                              LED Nephelometry (on-       ................................ ................................                                ................................       Mitchell M5331,11 Mitch-
                                                                                line).                                                                                                                                                              ell M5331, Rev. 1.2.42
                                                                              LED Nephelometry (on-       ................................ ................................                                ................................       AMI Turbiwell.15
                                                                                line).
                                                                              LED Nephelometry (port- ................................ ................................                                    ................................       Orion AQ4500.12
                                                                                able).
                                                                              360° Nephelometry ........ ................................ ................................                                 ................................       Hach Method 10258.39


                                                                 ALTERNATIVE TESTING METHODS FOR DISINFECTANT RESIDUALS LISTED AT 40 CFR 141.74(a)(2)
                                                    Residual                              Methodology                      SM 21st Edition 1                       SM 22nd Edition 28                                 ASTM 4                                  Other

                                           Free Chlorine .............        Amperometric Titration ...                 4500–Cl D ..............                 4500–Cl D ..............                 D 1253–08, ¥14 ...
                                                                              DPD Ferrous Titrimetric                    4500–Cl F ..............                 4500–Cl F ..............                 ................................
                                                                              DPD Colorimetric ...........               4500–Cl G .............                  4500–Cl G .............                  ................................       Hach Method 10260.31
                                                                              Syringaldazine (FACTS)                     4500–Cl H ..............                 4500–Cl H ..............                 ................................
                                                                              On-line Chlorine Ana-                      ................................         ................................         ................................       EPA 334.0.16
                                                                                lyzer.
                                                                              Amperometric Sensor ....                   ................................         ................................         ................................       ChloroSense.17
                                                                              Indophenol Colorimetric                    ................................         ................................         ................................       Hach Method 10241.34
                                           Total Chlorine ............        Amperometric Titration ...                 4500–Cl D ..............                 4500–Cl D ..............                 D 1253–08, ¥14 ...
                                                                              Amperometric Titration                     4500–Cl E ..............                 4500–Cl E ..............                 ................................
                                                                                (Low level measure-
                                                                                ment).
                                                                              DPD Ferrous Titrimetric                    4500–Cl F ..............                 4500–Cl F ..............                 ................................
                                                                              DPD Colorimetric ...........               4500–Cl G .............                  4500–Cl G .............                  ................................       Hach Method 10260.31
                                                                              Iodometric Electrode ......                4500–Cl I ...............                4500–Cl I ...............                ................................
                                                                              On-line Chlorine Ana-                      ................................         ................................         ................................       EPA 334.0.16
                                                                                lyzer.
                                                                              Amperometric Sensor ....                   ................................          ................................        ................................       ChloroSense.17

                                                        *                             *                              *                                      *                                      *                                     *                            *



                                           *       *         *         *       *
                                                              ALTERNATIVE TESTING METHODS FOR DISINFECTANT RESIDUALS LISTED AT 40 CFR 141.131(c)(1)
                                                                                                                                    SM 21st                                  SM 22nd
                                                     Residual                             Methodology                                                                                                                 ASTM 4                                  Other
                                                                                                                                    Edition 1                                Edition 28

                                           Free Chlorine ..................   Amperometric Titration ..........          4500–Cl D ..................             4500–Cl D ..................            D 1253–08, ¥14 ........
                                                                              DPD Ferrous Titrimetric .........          4500–Cl F ...................            4500–Cl F ...................           .....................................
                                                                              DPD Colorimetric ...................       4500–Cl G ..................             4500–Cl G ..................            .....................................   Hach Method 10260.31
                                                                              Syringaldazine (FACTS) ........            4500–Cl H ..................             4500–Cl H ..................            .....................................
                                                                              Amperometric Sensor ............           .....................................    .....................................   .....................................   ChloroSense.17
                                                                              On-line Chlorine Analyzer .....            .....................................    .....................................   .....................................   EPA 334.0.16
                                                                              Indophenol Colorimetric .........          .....................................    .....................................   .....................................   Hach Method 10241.34
                                           Combined Chlorine .........        Amperometric Titration ..........          4500–Cl D ..................             4500–Cl D ..................            D 1253–08, ¥14 ........
                                                                              DPD Ferrous Titrimetric .........          4500–Cl F ...................            4500–Cl F ...................           .....................................
                                                                              DPD Colorimetric ...................       4500–Cl G ..................             4500–Cl G ..................            .....................................   Hach Method 10260.31
                                           Total Chlorine .................   Amperometric Titration ..........          4500–Cl D ..................             4500–Cl D ..................            D 1253–08, ¥14 ........
                                                                              Low level Amperometric Titra-              4500–Cl E ..................             4500–Cl E ..................            .....................................
                                                                                tion.
                                                                              DPD Ferrous Titrimetric .........          4500–Cl F ...................            4500–Cl F ...................           .....................................
                                                                              DPD Colorimetric ...................       4500–Cl G ..................             4500–Cl G ..................            .....................................   Hach Method 10260.31
                                                                              Iodometric Electrode ..............        4500–Cl I ....................           4500–Cl I ....................          .....................................
                                                                              Amperometric Sensor ............           .....................................    .....................................   .....................................   ChloroSense.17
                                                                              On-line Chlorine Analyzer .....            .....................................    .....................................   .....................................   EPA 334.0.16

                                                                   *                         *                             *                                 *                                *                                *                          *
ehiers on DSK5VPTVN1PROD with RULES




                                           *       *         *         *       *




                                      VerDate Sep<11>2014        13:36 Jul 18, 2016       Jkt 238001   PO 00000          Frm 00020           Fmt 4700            Sfmt 4700        E:\FR\FM\19JYR1.SGM                   19JYR1


                                                                   Federal Register / Vol. 81, No. 138 / Tuesday, July 19, 2016 / Rules and Regulations                                                                                                    46847

                                                                         ALTERNATIVE TESTING METHODS FOR PARAMETERS LISTED AT 40 CFR 141.131(d)
                                                                                                                                        SM 21st               SM 22nd                  SM
                                                          Parameter                                Methodology                                                                                                       EPA                           Other
                                                                                                                                        Edition 1             Edition 28              Online 3

                                           Total Organic Carbon (TOC) ........       High Temperature Combustion ....                5310 B ........        5310 B .......         ....................   415.3, Rev 1.2.19
                                                                                     Persulfate-Ultraviolet or Heated                5310 C .......         5310 C .......         ....................   415.3, Rev 1.2 19                Hach Method 10267.38
                                                                                       Persulfate Oxidation.
                                                                                     Wet Oxidation ...............................   5310 D .......         5310 D .......         ....................   415.3, Rev 1.2.19
                                                                                     Ozone Oxidation ...........................     ....................   ....................   ....................   ..............................   Hach Method 10261.37
                                           Specific Ultraviolet Absorbance           Calculation using DOC and UV254                 ....................   ....................   ....................   415.3, Rev 1.2.19
                                             (SUVA).                                   data.
                                           Dissolved Organic Carbon (DOC)            High Temperature Combustion ....                5310 B ........        5310 B ........        ....................   415.3, Rev 1.2.19
                                                                                     Persulfate-Ultraviolet or Heated                5310 C .......         5310 C .......         ....................   415.3, Rev 1.2.19
                                                                                       Persulfate Oxidation.
                                                                                     Wet Oxidation ...............................   5310 D .......         5310 D .......         ....................   415.3, Rev 1.2.19
                                           Ultraviolet absorption at 254 nm          Spectrophotometry ........................      5910 B ........        5910 B ........        5910 B–11 ..           415.3, Rev 1.2.19
                                             (UV254).



                                           *       *        *       *       *                                 Scientific, 166 Cummings Center, Beverly,                                        Water by Solid Phase Extraction and
                                               1 Standard Methods for the Examination of                      MA 01915, http://www.thermo.com.                                                 Capillary Column Gas Chromatography/Mass
                                           Water and Wastewater, 21st edition (2005).                         *        *         *         *          *                                        Spectrometry (GC/MS),’’ February 2012.
                                           Available from American Public Health                                  14 EPAMethod 557. ‘‘Determination of                                         EPA/600/R–12/010. Available at http://
                                           Association, 800 I Street, NW., Washington,                        Haloacetic Acids, Bromate, and Dalapon in                                        www.epa.gov/water-research/epa-drinking-
                                           DC 20001–3710.                                                     Drinking Water by Ion Chromatography                                             water-research-methods.
                                              2 EPA Method 200.5, Revision 4.2.                                                                                                                   25 EPA Method 536. ‘‘Determination of
                                                                                                              Electrospray Ionization Tandem Mass
                                           ‘‘Determination of Trace Elements in                               Spectrometry (IC–ESI–MS/MS),’’ September                                         Triazine Pesticides and their Degradates in
                                           Drinking Water by Axially Viewed                                   2009. EPA 815–B–09–012. Available at the                                         Drinking Water by Liquid Chromatography
                                           Inductively Coupled Plasma-Atomic                                  National Service Center for Environmental                                        Electrospray Ionization Tandem Mass
                                           Emission Spectrometry.’’ 2003. EPA/600/R–                          Publications (www.epa.gov/nscep). Search                                         Spectrometry (LC/ESI–MS/MS),’’ October
                                           06/115. (Available at http://www.epa.gov/                          ‘‘815B09012’’.                                                                   2007. EPA 815–B–07–002. Available at the
                                           water-research/epa-drinking-water-research-                           15 AMI Turbiwell, ‘‘Continuous                                                National Service Center for Environmental
                                           methods.)                                                          Measurement of Turbidity Using a SWAN                                            Publications (www.epa.gov/nscep). Search
                                              3 Standard Methods Online are available at                      AMI Turbiwell Turbidimeter,’’ August 2009.                                       ‘‘815B07002’’.
                                                                                                                                                                                                  26 EPA Method 523. ‘‘Determination of
                                           http://www.standardmethods.org. The year                           Available at https://www.nemi.gov or from
                                                                                                              Markus Bernasconi, SWAN Analytische                                              Triazine Pesticides and their Degradates in
                                           in which each method was approved by the
                                                                                                              Instrumente AG, Studbachstrasse 13, CH–                                          Drinking Water by Gas Chromatography/
                                           Standard Methods Committee is designated
                                                                                                              8340 Hinwil, Switzerland.                                                        Mass Spectrometry (GC/MS),’’ February
                                           by the last two digits in the method number.
                                                                                                                 16 EPA Method 334.0. ‘‘Determination of                                       2011. EPA 815–R–11–002. Available at the
                                           The methods listed are the only online                                                                                                              National Service Center for Environmental
                                           versions that may be used.                                         Residual Chlorine in Drinking Water Using
                                              4 Available from ASTM International, 100                        an On-line Chlorine Analyzer,’’ September                                        Publications (www.epa.gov/nscep). Search
                                                                                                              2009. EPA 815–B–09–013. Available at the                                         ‘‘815R11002’’.
                                           Barr Harbor Drive, West Conshohocken, PA                                                                                                               27 EPA Method 1623.1. ‘‘Cryptosporidium
                                           19428–2959 or http://astm.org. The methods                         National Service Center for Environmental
                                                                                                              Publications (www.epa.gov/nscep). Search                                         and Giardia in Water by Filtration/IMS/FA,’’
                                           listed are the only alternative versions that                                                                                                       2012. EPA–816–R–12–001. Available at the
                                           may be used.                                                       ‘‘815B09013’’.
                                                                                                                 17 ChloroSense. ‘‘Measurement of Free and                                     National Service Center for Environmental
                                           *       *        *       *       *                                 Total Chlorine in Drinking Water by Palintest                                    Publications (www.epa.gov/nscep). Search
                                               8 Systea
                                                      Easy (1-Reagent). ‘‘Systea Easy (1-                     ChloroSense,’’ August 2009. Available at                                         ‘‘816R12001’’.
                                           Reagent) Nitrate Method,’’ February 4, 2009.                                                                                                           28 Standard Methods for the Examination
                                                                                                              https://www.nemi.gov or from Palintest Ltd,
                                           Available at https://www.nemi.gov or from                          1455 Jamike Avenue (Suite 100), Erlanger,                                        of Water and Wastewater, 22nd edition
                                           Systea Scientific, LLC., 900 Jorie Blvd., Suite                    KY 41018.                                                                        (2012). Available from American Public
                                           35, Oak Brook, IL 60523.                                              18 EPA Method 302.0. ‘‘Determination of                                       Health Association, 800 I Street, NW.,
                                              9 EPA Method 524.3, Version 1.0.
                                                                                                              Bromate in Drinking Water using Two-                                             Washington, DC 20001–3710.
                                                                                                                                                                                                  29 EPA Method 524.4, Version 1.0.
                                           ‘‘Measurement of Purgeable Organic                                 Dimensional Ion Chromatography with
                                           Compounds in Water by Capillary Column                             Suppressed Conductivity Detection,’’                                             ‘‘Measurement of Purgeable Organic
                                           Gas Chromatography/Mass Spectrometry,’’                            September 2009. EPA 815–B–09–014.                                                Compounds in Water by Gas
                                           June 2009. EPA 815–B–09–009. Available at                          Available at the National Service Center for                                     Chromatography/Mass Spectrometry using
                                           the National Service Center for                                    Environmental Publications (www.epa.gov/                                         Nitrogen Purge Gas,’’ May 2013. EPA 815–R–
                                           Environmental Publications (www.epa.gov/                           nscep). Search ‘‘815B09014’’.                                                    13–002. Available at the National Service
                                           nscep). Search ‘‘815B09009’’.                                         19 EPA 415.3, Revision 1.2. ‘‘Determination                                   Center for Environmental Publications
                                              10 Mitchell Method M5271, Revision 1.1.                         of Total Organic Carbon and Specific UV                                          (www.epa.gov/nscep). Search ‘‘815R13002’’.
                                           ‘‘Determination of Turbidity by Laser                              Absorbance at 254 nm in Source Water and                                         *          *           *          *          *
                                           Nephelometry,’’ March 5, 2009. Available at                        Drinking Water,’’ September 2009. EPA/600/                                           31 Hach Company. ‘‘Hach Method 10260—
                                           https://www.nemi.gov or from Leck Mitchell,                        R–09/122. Available at http://www.epa.gov/                                       Determination of Chlorinated Oxidants (Free
                                           Ph.D., PE, 656 Independence Valley Dr.,                            water-research/epa-drinking-water-research-                                      and Total) in Water Using Disposable Planar
                                           Grand Junction, CO 81507.                                          methods.                                                                         Reagent-filled Cuvettes and Mesofluidic
                                              11 Mitchell Method M5331, Revision 1.1.
                                                                                                              *        *         *         *          *                                        Channel Colorimetry,’’ April 2013. 5600
                                           ‘‘Determination of Turbidity by LED                                    23 Hach
                                                                                                                        Company. ‘‘Hach Company                                                Lindbergh Drive, P.O. Box 389, Loveland, CO
                                           Nephelometry,’’ March 5, 2009. Available at                        TNTplus TM 835/836 Nitrate Method 10206—                                         80539. (Available at http://www.hach.com.)
ehiers on DSK5VPTVN1PROD with RULES




                                           https://www.nemi.gov or from Leck Mitchell,                        Spectrophotometric Measurement of Nitrate                                          33 Tecta EC/TC. ‘‘TechtaTM EC/TC Medium

                                           Ph.D., PE, 656 Independence Valley Dr.,                            in Water and Wastewater,’’ January 2011.                                         and TechtaTM Instrument: A Presence/
                                           Grand Junction, CO 81507.                                          5600 Lindbergh Drive, P.O. Box 389,                                              Absence Method for the Simultaneous
                                              12 Orion Method AQ4500, Revision 1.0.                           Loveland, Colorado 80539. (Available at                                          Detection of Total Coliforms and Escherichia
                                           ‘‘Determination of Turbidity by LED                                http://www.hach.com.)                                                            coli (E. coli) in Drinking Water,’’ version 1.0,
                                           Nephelometry,’’ May 8, 2009. Available at                            24 EPA Method 525.3. ‘‘Determination of                                        May 2014. Available from Veolia Water
                                           https://www.nemi.gov or from Thermo                                Semivolatile Organic Chemicals in Drinking                                       Solutions and Technologies, Suite 4697,



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                                           46848               Federal Register / Vol. 81, No. 138 / Tuesday, July 19, 2016 / Rules and Regulations

                                           Biosciences Complex, 116 Barrie Street,                  ACTION:  Final rule; information                      notice of action in the docket as well as
                                           Kingston, Ontario, Canada, K7L 3N6.                      collection approval.                                  OMB’s June 23, 2016 notice of action.
                                              34 Hach Company. ‘‘Hach Method 10241—
                                                                                                                                                             The Inspection of Towing Vessels
                                           Spectrophotometric Measurement of Free                   SUMMARY:   The Coast Guard announces                  final rule becomes effective July 20,
                                           Chlorine (Cl2) in Finished Drinking Water,’’             that the Office of Management and                     2016, and the Coast Guard may start
                                           November 2015. Revision 1.2. 5600                        Budget (OMB) has approved the
                                           Lindbergh Drive, P.O. Box 389, Loveland, CO                                                                    enforcing that rule’s applicable
                                                                                                    collection of information described in                collection of information requirements
                                           80539. (Available at http://www.hach.com.)
                                              35 Hach Company. ‘‘Hach Method 8026—                  the Inspection of Towing Vessels final                on that date. As noted in the summary
                                           Spectrophotometric Measurement of Copper                 rule published on June 20, 2016. In that              of that rule, certain existing towing
                                           in Finished Drinking Water,’’ December                   rule, which establishes safety                        vessels subject to this rule will have an
                                           2015. Revision 1.2. 5600 Lindbergh Drive,                regulations governing the inspection,                 additional 2 years before having to
                                           P.O. Box 389, Loveland, CO 80539.                        standards, and safety management                      comply with most of its requirements,
                                           (Available at http://www.hach.com.)                      systems of towing vessels, we stated that             but we anticipate receiving applications
                                              36 Hach Company. ‘‘Hach Method 10272—
                                                                                                    before the Coast Guard could enforce                  from organizations seeking to become
                                           Spectrophotometric Measurement of Copper                 the collection of information
                                           in Finished Drinking Water,’’ December                                                                         third-party organizations soon after the
                                                                                                    requirements in the rule, OMB would                   rule becomes effective.
                                           2015. Revision 1.2. 5600 Lindbergh Drive,
                                           P.O. Box 389, Loveland, CO 80539.
                                                                                                    need to approve the Coast Guard’s                        A copy of the two approval memos
                                           (Available at http://www.hach.com.)                      request to collect this information. This             from OMB and the Inspection of Towing
                                              37 Hach Company. ‘‘Hach Method 10261—                 document announces that approval. On                  Vessels final rule are in docket USCG–
                                           Total Organic Carbon in Finished Drinking                June 23, 2016, OMB approved this Coast                2006–24412 which is available on the
                                           Water by Catalyzed Ozone Hydroxyl Radical                Guard request and assigned this                       Internet by going to http://
                                           Oxidation Infrared Analysis,’’ December                  collection of information OMB control                 www.regulations.gov, inserting USCG–
                                           2015. Revision 1.2. 5600 Lindbergh Drive,                number 1625–0117.                                     2006–24412 in the ‘‘Search’’ box, and
                                           P.O. Box 389, Loveland, CO 80539.                        DATES: On June 23, 2016, OMB                          clicking ‘‘Search.’’
                                           (Available at http://www.hach.com.)
                                              38 Hach Company. ‘‘Hach Method 10267—                 approved a new collection of                             This document, which announces
                                           Spectrophotometric Measurement of Total                  information assigned OMB control                      approval of the collection of information
                                           Organic Carbon (TOC) in Finished Drinking                number 1625–0117. That approval                       assigned OMB control number 1625–
                                           Water,’’ December 2015. Revision 1.2. 5600               expires on June 30, 2019. Based on this               0117, is issued under authority of 5
                                           Lindbergh Drive, P.O. Box 389, Loveland, CO              OMB approval, the Coast Guard may                     U.S.C. 552(a).
                                           80539. (Available at http://www.hach.com.)               start enforcing applicable collection of                Dated: July 14, 2016.
                                              39 Hach Company. ‘‘Hach Method 10258—
                                                                                                    information requirements in the                       J.G. Lantz,
                                           Determination of Turbidity by 360°                       Inspection of Towing Vessels final rule
                                           Nephelometry,’’ January 2016. 5600                                                                             Director of Commercial Regulations and
                                                                                                    published in the Federal Register on                  Standards.
                                           Lindbergh Drive, P.O. Box 389, Loveland, CO
                                           80539. (Available at http://www.hach.com.)
                                                                                                    June 20, 2016 (81 FR 40004), starting on
                                                                                                                                                          [FR Doc. 2016–17007 Filed 7–18–16; 8:45 am]
                                              40 Nitrate Elimination Company, Inc.                  that rule’s effective date, July 20, 2016.
                                                                                                                                                          BILLING CODE 9110–04–P
                                           (NECi). ‘‘Method for Nitrate Reductase                   FOR FURTHER INFORMATION CONTACT: If
                                           Nitrate-Nitrogen Analysis of Drinking                    you have questions about this rule, call
                                           Water,’’ February 2016. Superior Enzymes,                or email Lieutenant Commander
                                           Inc., 334 Hecla Street, Lake Linden, Michigan                                                                  DEPARTMENT OF COMMERCE
                                                                                                    William Nabach, Project Manager, CG–
                                           49945.                                                   OES–2, Coast Guard, telephone 202–
                                              41 Thermo Fisher. ‘‘Thermo Fisher                                                                           National Oceanic and Atmospheric
                                                                                                    372–1386, email William.A.Nabach@                     Administration
                                           Scientific Drinking Water Orthophosphate
                                           Method for Thermo Scientific Gallery                     uscg.mil.
                                           Discrete Analyzer,’’ February 2016. Revision             SUPPLEMENTARY INFORMATION: On June                    50 CFR Part 622
                                           5. Thermo Fisher Scientific, Ratastie 2, 01620           23, 2016, the Office of Management and
                                           Vantaa, Finland.                                                                                               [Docket No. 121004518–3398–01]
                                              42 Mitchell Method M5331, Revision 1.2.
                                                                                                    Budget (OMB) approved a new
                                                                                                    collection of information for the                     RIN 0648–XE701
                                           ‘‘Determination of Turbidity by LED or Laser
                                           Nephelometry,’’ February 2016. Available
                                                                                                    Inspection of Towing Vessels final rule
                                                                                                    published on June 20, 2016 (81 FR                     Reef Fish Fishery of the Gulf of
                                           from Leck Mitchell, Ph.D., PE, 656                                                                             Mexico; 2016 Recreational
                                           Independence Valley Dr., Grand Junction, CO              40004). In that rule, which establishes
                                                                                                    safety regulations governing the                      Accountability Measures and Closure
                                           81507.
                                                                                                    inspection, standards, and safety                     for Gulf of Mexico Gray Triggerfish
                                           [FR Doc. 2016–16516 Filed 7–18–16; 8:45 am]
                                           BILLING CODE 6560–50–P
                                                                                                    management systems of towing vessels,                 AGENCY:  National Marine Fisheries
                                                                                                    we stated that before the Coast Guard                 Service (NMFS), National Oceanic and
                                                                                                    could enforce the collection of                       Atmospheric Administration (NOAA),
                                                                                                    information requirements in the rule,                 Commerce.
                                           DEPARTMENT OF HOMELAND                                   OMB would need to approve the Coast
                                           SECURITY                                                                                                       ACTION: Temporary rule; closure.
                                                                                                    Guard’s request to collect this
                                                                                                    information. This document announces                  SUMMARY:   NMFS implements
                                           Coast Guard
                                                                                                    the approval of that collection which                 accountability measures (AMs) for the
                                                                                                    has been assigned OMB control number                  gray triggerfish recreational sector in the
                                           46 CFR Parts 1, 2, 15, 136, 137, 138,
                                                                                                    1625–0117. OMB’s approval of that                     exclusive economic zone (EEZ) of the
                                           139, 140, 141, 142, 143, 144, and 199
                                                                                                    collection will expire on June 30, 2019.              Gulf of Mexico (Gulf) for the 2016
ehiers on DSK5VPTVN1PROD with RULES




                                           [Docket No. USCG–2006–24412]                               On July 12, 2016, OMB approved the                  fishing year through this temporary rule.
                                                                                                    insertion of ‘‘CFR’’ in the title of the              NMFS has determined that the 2015
                                           RIN 1625–AB06                                            collection of information so it conforms              recreational annual catch limit (ACL) for
                                           Inspection of Towing Vessels                             with the title presented in the final rule:           Gulf gray triggerfish was exceeded;
                                                                                                    Towing Vessels—Title 46 CFR                           therefore, NMFS reduces the gray
                                           AGENCY:    Coast Guard, DHS.                             Subchapter M. We have included that                   triggerfish recreational ACL and annual


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Document Created: 2016-07-19 01:11:01
Document Modified: 2016-07-19 01:11:01
CategoryRegulatory Information
CollectionFederal Register
sudoc ClassAE 2.7:
GS 4.107:
AE 2.106:
PublisherOffice of the Federal Register, National Archives and Records Administration
SectionRules and Regulations
ActionFinal rule.
DatesThis action is effective July 19, 2016.
ContactThe Safe Drinking Water Hotline (800) 426-4791 or Glynda Smith, Technical Support Center, Standards and Risk Management Division, Office of Ground Water and Drinking Water (MS 140), Environmental Protection Agency, 26 West Martin Luther King Drive, Cincinnati, OH 45268; telephone number: (513) 569-7652; email
FR Citation81 FR 46839 
CFR AssociatedEnvironmental Protection; Chemicals; Indians-Lands; Intergovernmental Relations; Reporting and Recordkeeping Requirements and Water Supply

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