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

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: 

smith.glynda@epa.gov. 

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: 

Category Examples of potentially regulated entities NAICS1

State, local, & tribal governments.State, local and 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.

924110 

Industry ............................... Private operators of community and non-transient non-community water systems required to

monitor.

221310 

Municipalities ...................... Municipal operators of community and non-transient non-community water systems required to 

monitor.

924110 

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. 


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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 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 

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-pphenylenediamine (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 


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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 gaspermeable 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° 

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. 


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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-phosphomolybdate 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 


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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)—PersulfateUltraviolet 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 


ehiers on DSK5VPTVN1PROD with RULES
46844 Federal Register / Vol. 81, No. 138 / Tuesday, July 19, 2016 / Rules and Regulations 

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° 

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 

■ 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. 

■ 2. Appendix A to subpart c of part 141 

is amended as follows: 

■ 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).’’ 

■ b. By revising the entry for 

‘‘Turbidity’’ in the table entitled 

‘‘ALTERNATIVE TESTING METHODS 

FOR CONTAMINANTS LISTED AT 40 

CFR 141.74(a)(1).’’ 

■ 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).’’ 

■ 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).’’ 

■ e. By revising the entire table entitled 

‘‘ALTERNATIVE TESTING METHODS 

FOR PARAMETERS LISTED AT 40 CFR 

141.131(d).’’ 

■ f. By revising footnotes 2, 9, 14, 16, 18, 

19, 24–27, 29, and 33. 

■ 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) 

Contaminant Methodology EPA method SM 21st Edition 1

SM 22nd 

Edition 28 SM Online 3 ASTM 4 Other 

*******

Antimony .......................... Hydride–Atomic Absorption.

....................... ....................... ....................... ....................... D 3697–07, 

–12.

Atomic Absorption; Furnace........................ 3113 B .......... 3113 B .......... 3113 B–04, 

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 

Contaminant Methodology EPA method SM 21st Edition 1

SM 22nd 

Edition 28 SM Online 3 ASTM 4 Other 

Axially viewed inductively 

coupled plasma-atomic 

emission spectrometry 

(AVICP–AES).

200.5, Revision 4.2.2.

....................... ....................... ....................... .......................

* * * * * * * 

Calcium ............................ EDTA Titrimetric ............. ....................... 3500–Ca B ... 3500–Ca B ... ....................... D 511–09, 

–14 A.

Atomic Absorption; Direct 

Aspiration.

....................... 3111 B .......... 3111 B .......... ....................... D 511–90, 

–14 B.

Inductively Coupled Plasma........................ 3120 B .......... 3120 B .......... ....................... .......................

Axially viewed inductively 

coupled plasma–atomic 

emission spectrometry 

(AVICP–AES).

200.5, Revision 4.2.2.

....................... ....................... ....................... .......................

Ion Chromatography ....... ....................... ....................... ....................... ....................... D 6919–09 ....

* * * * * * * 

Copper ............................. Atomic Absorption; Furnace........................ 3113 B .......... 3113 B .......... 3113 B–04, 

B–10.

D 1688–07, 

–12 C.

Atomic Absorption; Direct 

Aspiration.

....................... 3111 B .......... 3111 B .......... ....................... D 1688–07, 

–12 A.

Inductively Coupled Plasma........................ 3120 B .......... 3120 B .......... ....................... .......................

Axially viewed inductively 

coupled plasma–atomic 

emission spectrometry 

(AVICP–AES).

200.5, Revision 4.2.2.

....................... ....................... ....................... .......................

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 Plasma........................ 3120 B .......... 3120 B .......... ....................... .......................

Complexation Titrimetric 

Methods.

....................... 3500–Mg B ... 3500–Mg B ... ....................... D 511–09, 

–14 A.

Axially viewed inductively 

coupled plasma-atomic 

emission spectrometry 

(AVICP–AES).

200.5, Revision 4.2.2.

....................... ....................... ....................... .......................

Ion Chromatography ....... ....................... ....................... ....................... ....................... D 6919–09 ....

* * * * * * * 

Nitrate .............................. Ion Chromatography ....... ....................... 4110 B .......... 4110 B .......... ....................... D 4327–11 ....

Automated Cadmium Reduction........................ 4500–NO3

F.

4500–NO3

F.

....................... .......................

Manual Cadmium Reduction.

....................... 4500–NO3

E.

4500–NO3

E.

....................... .......................

Ion Selective Electrode ... ....................... 4500–NO3

D.

4500–NO3

D.

....................... .......................

Reduction/Colorimetric .... ....................... ....................... ....................... ....................... ....................... Systea Easy (1-Reagent) 8 NECi NitrateReductase.40

Colorimetric; Direct ......... ....................... ....................... ....................... ....................... ....................... Hach TNTplus TM 835/

836 Method 10206.23

Nitrite ............................... Ion Chromatography ....... ....................... 4110 B .......... 4110 B .......... ....................... D 4327–11 ....

Automated Cadmium Reduction........................ 4500–NO3

F.

4500–NO3

F.

....................... .......................

Manual Cadmium Reduction........................ 4500–NO3

E.

4500–NO3

E.

....................... .......................

Spectrophotometric ......... ....................... 4500–NO2

B.

4500–NO2

B.

....................... .......................

Reduction/Colorimetric .... ....................... ....................... ....................... ....................... ....................... Systea Easy (1-Reagent) 8 NECi NitrateReductase.40

Orthophosphate ............... Ion Chromatography ....... ....................... 4110 B .......... 4110 B .......... ....................... D 4327–11 ....

Colorimetric, ascorbic 

acid, single reagent.

....................... 4500–P E ...... 4500–P E ...... 4500–P E–99 .......................

Colorimetric, Automated, 

Ascorbic Acid.

....................... 4500–P F ...... 4500–P F ...... 4500–P F–99 ....................... Thermo-Fisher Discrete 

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 (online)................................. ................................ ................................ Mitchell M5271,10 Mitchell M5331, Rev. 1.2.42

LED Nephelometry (online)................................. ................................ ................................ Mitchell M5331,11 Mitchell M5331, Rev. 1.2.42

LED Nephelometry (online)................................. ................................ ................................ AMI Turbiwell.15

LED Nephelometry (portable)................................. ................................ ................................ Orion AQ4500.12

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 Analyzer................................. ................................ ................................ EPA 334.0.16

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 

(Low level measurement).

4500–Cl E .............. 4500–Cl E .............. ................................

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 Analyzer................................. ................................ ................................ EPA 334.0.16

Amperometric Sensor .... ................................ ................................ ................................ ChloroSense.17

* * * * * * * 

* * * * * 

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 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 Titration.4500–Cl E .................. 4500–Cl E .................. .....................................

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

* * * * * * * 

* * * * * 


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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) 

Parameter Methodology SM 21st 

Edition 1

SM 22nd 

Edition 28

SM 

Online 3 EPA Other 

Total Organic Carbon (TOC) ........ High Temperature Combustion .... 5310 B ........ 5310 B ....... .................... 415.3, Rev 1.2.19

Persulfate-Ultraviolet or Heated 

Persulfate Oxidation.

5310 C ....... 5310 C ....... .................... 415.3, Rev 1.2 19 Hach Method 10267.38

Wet Oxidation ............................... 5310 D ....... 5310 D ....... .................... 415.3, Rev 1.2.19

Ozone Oxidation ........................... .................... .................... .................... .............................. Hach Method 10261.37

Specific Ultraviolet Absorbance 

(SUVA).

Calculation using DOC and UV254

data.

.................... .................... .................... 415.3, Rev 1.2.19

Dissolved Organic Carbon (DOC) High Temperature Combustion .... 5310 B ........ 5310 B ........ .................... 415.3, Rev 1.2.19

Persulfate-Ultraviolet or Heated 

Persulfate Oxidation.

5310 C ....... 5310 C ....... .................... 415.3, Rev 1.2.19

Wet Oxidation ............................... 5310 D ....... 5310 D ....... .................... 415.3, Rev 1.2.19

Ultraviolet absorption at 254 nm 

(UV254).

Spectrophotometry ........................ 5910 B ........ 5910 B ........ 5910 B–11 .. 415.3, Rev 1.2.19

* * * * * 1Standard 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. 2EPA 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-researchmethods.) 3Standard 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. 4Available 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. 

* * * * * 8Systea 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. 9EPA 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’’. 10Mitchell 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. 11Mitchell 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. 12Orion 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. 

* * * * * 14EPA 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’’. 15AMI 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. 16EPA 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’’. 17ChloroSense. ‘‘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. 18EPA Method 302.0. ‘‘Determination of 

Bromate in Drinking Water using TwoDimensional 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’’. 19EPA 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-researchmethods. 

* * * * * 23Hach 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.) 24EPA 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-drinkingwater-research-methods. 25EPA 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’’. 26EPA 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’’. 27EPA 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’’. 28Standard 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. 29EPA 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’’. 

* * * * * 31Hach 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.) 33Tecta EC/TC. ‘‘TechtaTM EC/TC Medium 

and TechtaTM 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, 


ehiers on DSK5VPTVN1PROD with RULES
46848 Federal Register / Vol. 81, No. 138 / Tuesday, July 19, 2016 / Rules and Regulations 

Biosciences Complex, 116 Barrie Street, 

Kingston, Ontario, Canada, K7L 3N6. 34Hach 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.) 35Hach 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.) 36Hach 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.) 37Hach 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.) 38Hach 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.) 39Hach Company. ‘‘Hach Method 10258— 

Determination of Turbidity by 360° 

Nephelometry,’’ January 2016. 5600 

Lindbergh Drive, P.O. Box 389, Loveland, CO 

80539. (Available at http://www.hach.com.) 40Nitrate 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. 41Thermo 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. 42Mitchell 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 

DEPARTMENT OF HOMELAND 

SECURITY 

Coast Guard 

46 CFR Parts 1, 2, 15, 136, 137, 138, 

139, 140, 141, 142, 143, 144, and 199 

[Docket No. USCG–2006–24412] 

RIN 1625–AB06 

Inspection of Towing Vessels 

AGENCY: Coast Guard, DHS. 

ACTION: Final rule; information 

collection approval. 

SUMMARY: The Coast Guard announces 

that the Office of Management and 

Budget (OMB) has approved the 

collection of information described in 

the Inspection of Towing Vessels final 

rule published on June 20, 2016. In that 

rule, which establishes safety 

regulations governing the inspection, 

standards, and safety management 

systems of towing vessels, we stated that 

before the Coast Guard could enforce 

the collection of information 

requirements in the rule, OMB would 

need to approve the Coast Guard’s 

request to collect this information. This 

document announces that approval. On 

June 23, 2016, OMB approved this Coast 

Guard request and assigned this 

collection of information OMB control 

number 1625–0117. 

DATES: On June 23, 2016, OMB 

approved a new collection of 

information assigned OMB control 

number 1625–0117. That approval 

expires on June 30, 2019. Based on this 

OMB approval, the Coast Guard may 

start enforcing applicable collection of 

information requirements in the 

Inspection of Towing Vessels final rule 

published in the Federal Register on 

June 20, 2016 (81 FR 40004), starting on 

that rule’s effective date, July 20, 2016. 

FOR FURTHER INFORMATION CONTACT: If 

you have questions about this rule, call 

or email Lieutenant Commander 

William Nabach, Project Manager, CG– 

OES–2, Coast Guard, telephone 202– 

372–1386, email William.A.Nabach@

uscg.mil. 

SUPPLEMENTARY INFORMATION: On June 

23, 2016, the Office of Management and 

Budget (OMB) approved a new 

collection of information for the 

Inspection of Towing Vessels final rule 

published on June 20, 2016 (81 FR 

40004). In that rule, which establishes 

safety regulations governing the 

inspection, standards, and safety 

management systems of towing vessels, 

we stated that before the Coast Guard 

could enforce the collection of 

information requirements in the rule, 

OMB would need to approve the Coast 

Guard’s request to collect this 

information. This document announces 

the approval of that collection which 

has been assigned OMB control number 

1625–0117. OMB’s approval of that 

collection will expire on June 30, 2019. 

On July 12, 2016, OMB approved the 

insertion of ‘‘CFR’’ in the title of the 

collection of information so it conforms 

with the title presented in the final rule: 

Towing Vessels—Title 46 CFR 

Subchapter M. We have included that 

notice of action in the docket as well as 

OMB’s June 23, 2016 notice of action. 

The Inspection of Towing Vessels 

final rule becomes effective July 20, 

2016, and the Coast Guard may start 

enforcing that rule’s applicable 

collection of information requirements 

on that date. As noted in the summary 

of that rule, certain existing towing 

vessels subject to this rule will have an 

additional 2 years before having to 

comply with most of its requirements, 

but we anticipate receiving applications 

from organizations seeking to become 

third-party organizations soon after the 

rule becomes effective. 

A copy of the two approval memos 

from OMB and the Inspection of Towing 

Vessels final rule are in docket USCG– 

2006–24412 which is available on the 

Internet by going to http://

www.regulations.gov, inserting USCG– 

2006–24412 in the ‘‘Search’’ box, and 

clicking ‘‘Search.’’ 

This document, which announces 

approval of the collection of information 

assigned OMB control number 1625– 

0117, is issued under authority of 5 

U.S.C. 552(a). 

Dated: July 14, 2016. 

J.G. Lantz, 

Director of Commercial Regulations and 

Standards. 

[FR Doc. 2016–17007 Filed 7–18–16; 8:45 am] 

BILLING CODE 9110–04–P 

DEPARTMENT OF COMMERCE 

National Oceanic and Atmospheric 

Administration 

50 CFR Part 622 

[Docket No. 121004518–3398–01] 

RIN 0648–XE701 

Reef Fish Fishery of the Gulf of 

Mexico; 2016 Recreational 

Accountability Measures and Closure 

for Gulf of Mexico Gray Triggerfish 

AGENCY: National Marine Fisheries 

Service (NMFS), National Oceanic and 

Atmospheric Administration (NOAA), 

Commerce. 

ACTION: Temporary rule; closure. 

SUMMARY: NMFS implements 

accountability measures (AMs) for the 

gray triggerfish recreational sector in the 

exclusive economic zone (EEZ) of the 

Gulf of Mexico (Gulf) for the 2016 

fishing year through this temporary rule. 

NMFS has determined that the 2015 

recreational annual catch limit (ACL) for 

Gulf gray triggerfish was exceeded; 

therefore, NMFS reduces the gray 

triggerfish recreational ACL and annual 


ehiers on DSK5VPTVN1PROD with RULES