```

[Federal Register Volume 79, Number 118 (Thursday, June 19, 2014)]
[Rules and Regulations]
[Pages 35081-35096]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2014-14369]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 141

[EPA-HQ-OW-2014-0408; FRL-9912-52-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.

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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 (SDWA) authorizes EPA to approve the use of 
alternative testing methods through publication in the Federal 
Register. EPA is using this streamlined authority to make 21 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 June 19, 2014.

FOR FURTHER INFORMATION CONTACT: 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 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:

[[Page 35082]]

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

    This table is not 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.

B. How can I get copies of this document and other related information?

    Docket. EPA established a docket for this action under Docket ID 
No. EPA-HQ-OW-2014-0408. Publicly available docket materials are 
available either electronically through www.regulations.gov or in hard 
copy at the Water Docket in the EPA Docket Center, (EPA/DC) William 
Jefferson Clinton West Building, Room 3334, 1301 Constitution Ave. NW., 
Washington, DC. Copyrighted materials are available only in hard copy. 
The EPA DC Public Reading Room is open from 8:30 a.m. to 4:30 p.m., 
Monday through Friday, excluding legal holidays. The telephone number 
for the Public Reading Room is (202) 566-1744, and the telephone number 
for the Water Docket is (202) 566-2426.
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
GWR: Ground Water Rule
NAICS: North American Industry Classification System
NEMI: National Environmental Methods Index
PRFC: Planar Reagent-Filled Cuvette(s)
QC: Quality Control
RTCR: Revisions to the Total Coliform Rule
SDWA: The Safe Drinking Water Act
TCR: Total Coliform Rule
VCSB: Voluntary Consensus Standard Bodies

II. Background

A. What is the purpose of this action?

    In this action, EPA is approving 21 analytical methods for 
determining contaminant concentrations in 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 http://water.epa.gov/scitech/drinkingwater/labcert/analyticalmethods_expedited.cfm.

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 21 additional methods available for 
determining contaminant concentrations in 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 21 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 21 methods that are equally effective relative to 
methods previously promulgated in the regulations. By means of this 
rule, these 21 methods are added to Appendix A to Subpart C of 40 CFR 
Part 141.

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

    1. Standard Methods for the Examination of Water and Wastewater 
(Standard Methods). EPA compared the most recent online versions of 14 
Standard Methods to earlier versions of those methods that are 
currently approved in 40 CFR parts 141 and 143. Changes between the 
approved version and the most recent version of each method are 
summarized in Smith and Wendelken (2013a). The revisions primarily 
involve editorial changes (e.g., corrections of errors, procedural 
clarifications, and reorganization of text). The updated online 
versions listed in the following table are the same as the earlier 
approved versions with respect to the chemistry and microbiology, 
sample handling protocols, and method performance data. For all of 
these reasons, EPA has concluded that the updated online versions are 
equally effective relative to those that are currently approved in the 
regulations. Therefore, EPA is approving the use of the 14 updated 
Standard Methods for the contaminants and their respective regulations 
listed in the following table:

[[Page 35083]]

----------------------------------------------------------------------------------------------------------------
   Standard method revised version         Approved method            Contaminant               Regulation
----------------------------------------------------------------------------------------------------------------
2550-10, online version (APHA 2010a).  2550-00, online version  Temperature............  40 CFR 141.23(k)(1).
                                        (APHA 2000a).
3113 B-10, online version (APHA        3113 B-99, online        Antimony, arsenic,       40 CFR 141.23(k)(1); 40
 2010b).                                version (APHA 1999).     barium, beryllium,       CFR 143.4(b).
                                                                 cadmium, chromium,
                                                                 copper, lead, nickel,
                                                                 selenium, aluminum,
                                                                 iron, manganese,
                                                                 silver.
5910 B-11, online version (APHA 2011)  5910 B-00, online        UV Absorption at 254 nm  40 CFR 141.131(d).
                                        version (APHA 2000b).
6251 B-07, online version (APHA 2007)  6251 B-94, online        HAA5...................  40 CFR 141.131(b)(1).
                                        version (APHA 1994).
6640 B-06, online version (APHA        EPA Method 515.4, Rev.   2,4-D; 2,4,5-TP;         40 CFR 141.24(e)(1).
 2006a).                                1.0 (USEPA 2000).        Dalapon; Dinoseb;
                                                                 Pentachlorophenol;
                                                                 Picloram.
6651 B-05, online version (APHA        6651 B, 20th Edition     Glyphosate.............  40 CFR 141.24(e)(1).
 2005a).                                (APHA 1998).
9221 A-06, online version (APHA        9221 A, 20th Edition     Total Coliforms........  40 CFR 141.21(f)(3); 40
 2006b).                                (APHA 1998).                                      CFR 141.74(a)(1).
9221 B-06, online version (APHA        9221 B, 20th Edition     Total Coliforms........  40 CFR 141.21(f)(3); 40
 2006c).                                (APHA 1998).                                      CFR 141.74(a)(1).
9221 B.1, B.2-06, online version       9221 B.1, B.2, 20th      Total Coliforms........  40 CFR 141.852(a)(5).
 (APHA 2006c).                          Edition (APHA 1998).
9221 C-06, online version (APHA        9221 C, 20th Edition     Total Coliforms........  40 CFR 141.74(a)(1).
 2006d).                                (APHA 1998).
9221 E-06, online version (APHA        9221 E, 20th Edition     Fecal Coliforms........  40 CFR 141.21(f)(5); 40
 2006e).                                (APHA 1998).                                      CFR 141.74(a)(1).
9221 F-06, online version (APHA        9221 F, 20th Edition     E. coli................  40 CFR 141.402(c)(2).
 2006f).                                (APHA 1998).
9221 F.1-06, online version (APHA      9221 F.1, 20th Edition   E. coli................  40 CFR 141.852(a)(5).
 2006f).                                (APHA 1998).
9222 D-06, online version (APHA        9222 D, 20th Edition     Fecal Coliforms........  40 CFR 141.74(a)(1).
 2006g).                                (APHA 1998).
9223 B-04, online version (APHA        9223, 20th Edition       Total Coliforms........  40 CFR 141.21(f)(3); 40
 2004a).                                (APHA 1998).                                      CFR 141.74(a)(1); 40
                                                                                          CFR 141.852(a)(5).
9223 B-04, online version (APHA        9223 B, 20th Edition     E. coli................  40 CFR 141.21(f)(6); 40
 2004a).                                (APHA 1998).                                      CFR 141.402(c)(2); 40
                                                                                          CFR 141.852(a)(5).
9215 B-04, online version (APHA        9215 B, 20th Edition     Heterotrophic Bacteria.  40 CFR 141.74(a)(1).
 2004b).                                (APHA 1998).
----------------------------------------------------------------------------------------------------------------

    The online versions of Standard Methods are available at http://www.standardmethods.org.
    2. ASTM International. EPA compared the most recent versions of 
three ASTM International methods (ASTM Methods D512-12 B, D3223-12, and 
D4327-11) to the earlier versions of those methods that are currently 
approved in 40 CFR 141 and 143. Changes between the earlier approved 
version and the most recent version of each method are summarized in 
Smith (2013). 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
----------------------------------------------------------------------------------------------------------------
D512-12 B (ASTM 2012a)...............  D512-89 B (reapproved    Chloride...............  40 CFR 143.4(b).
                                        1999) (ASTM 1989).
D3223-12 (ASTM 2012b)................  D3223-02 (ASTM 2002)...  Mercury................  40 CFR 141.23(k)(1).
D4327-11 (ASTM 2011).................  D4327-03 (ASTM 2003)...  Fluoride, nitrate,       40 CFR 141.23(k)(1); 40
                                                                 nitrite,                 CFR 143.4(b).
                                                                 orthophosphate,
                                                                 chloride, sulfate.
----------------------------------------------------------------------------------------------------------------

    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. IDEXX Laboratories, Inc. Colilert-18[supreg]. Colilert-
18[supreg] is an approved commercial medium capable of simultaneous 
detection of total coliform and Escherichia coli bacteria. The use of 
this medium is described in Standard Method 9223 B, 21st edition of 
Standard Methods for the Examination of Water and Wastewater (APHA 
2005b). Standard Method 9223 B is approved for determination of total 
coliform bacteria and E. coli under the Revisions to the Total Coliform 
Rule (RTCR) (USEPA 2013) as cited at 40 CFR 141.852(a)(5). Colilert-
18[supreg] is a minor variation of an already approved medium, and was 
determined to be applicable to the Total Coliform Rule (TCR) (Dougherty 
1996). EPA is using today's action to clarify that Colilert-18[supreg] 
is itself an approved medium when used as described in Standard Method 
9223 B for determining total coliform bacteria and E. coli in drinking 
water under the RTCR. Accordingly, EPA is adding the Colilert-
18[supreg] medium and methodology as described in Standard Method 9223 
B to the list of alternative testing methods in Appendix A to Subpart C 
of Part 141. Colilert-18[supreg] is

[[Page 35084]]

available from IDEXX Laboratories, Inc., One IDEXX Drive, Westbrook, ME 
04092, and also at http://www.idexx.com.
    2. Hach Company Method 10260--Determination of Chlorinated Oxidants 
(Free and Total) in Water using Disposable Planar Reagent-Filled 
Cuvettes and Mesofluidic Channel Colorimetry (Hach Company 2013a). The 
Hach Company Method 10260 uses disposable planar reagent-filled 
cuvettes (PRFC) to measure free, total and combined chlorine as an 
optional alternate test procedure to Standard Method 4500-Cl G (APHA 
1998) which is approved in the drinking water regulations at 40 CFR 
141.74(a)(2) for determination of free and total chlorine, and at 40 
CFR 141.131(c)(1) for determination of free, total and combined 
chlorine. In this method, a mesofluidic pump system draws a water 
sample through a cuvette that is prefilled with the reagents required 
to perform DPD (N,N-diethyl-p-phenylenediamine) colorimetric chlorine 
tests. The sample is then drawn to an optical channel where the 
chlorine level is measured at a wavelength between 490 and 530 nm. 
Automation of the DPD determination relative to the manual procedure 
described in the approved method reduces errors associated with reagent 
addition, mixing and color development. Three laboratories analyzed a 
variety of drinking water matrices (e.g., low ionic strength, high 
ionic strength, and tap water samples derived from both surface water 
and ground water sources). The performance characteristics of the Hach 
Method 10260 were compared to the performance characteristics of the 
approved method. The validation study report (Hach 2013b) summarizes 
the results obtained from the multi-laboratory study and indicates that 
Hach Method 10260 is equally as effective as Standard Method 4500-Cl G 
for the colorimetric determination of free and total chlorine in 
drinking water. The basis for this determination is discussed in Smith 
and Wendelken (2013b). EPA is thus approving Hach Method 10260 as an 
alternate method to Standard Method 4500-Cl G for the analysis of free 
and total chlorine in drinking water. Hach Method 10260 is available 
from Hach Company, 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 
80539, and also at www.hach.com.
    3. Palintest Ltd ChlordioX Plus Method--Chlorine Dioxide and 
Chlorite in Drinking Water by Amperometry using Disposable Sensors 
(Palintest Ltd 2013). The Palintest Ltd ChlordioX Plus uses recyclable 
disposable sensors for amperometric detection of chlorine dioxide and 
the disinfection byproduct, chlorite, in drinking water. Standard 
Method 4500-ClO2 E (APHA 1998) is an amperometric titration 
method that is currently approved in the regulations at 40 CFR 
141.74(a)(2) and 40 CFR 141.131(c)(1) for determination of chlorine 
dioxide in drinking water; it is also cited in the regulations at 40 
CFR 141.131(b)(1) for routine daily monitoring of chlorite. The 
approved method requires experienced analysts and is not portable, 
which limits options for field and site testing. The ChlordioX Plus 
method is associated with a portable sensor driven instrument and 
chlorine dioxide standards are available, which can be used with the 
instrument. Chlorine dioxide is reduced at the surface of the sensor 
and the current produced is directly proportional to the chlorine 
dioxide level in the sample. The chlorite level can be determined from 
a sample duplicate by oxidation of iodide to iodine. The method 
performance of the ChlordioX Plus method was compared to the 
performance of Standard Method 4500-ClO2 E at three public 
drinking water utilities that use chlorine dioxide for primary 
disinfection. A variety of samples, including drinking water samples 
from both surface and ground water sources, were fortified with known 
chlorine dioxide and chlorite concentrations and then analyzed by each 
method. The results of the validation study are summarized in Smith and 
Wendelken (2013c). EPA has determined that the ChlordioX Plus method is 
equally as effective as the approved method, Standard Method 4500-
ClO2 E. The basis for this determination is discussed in 
Smith and Wendelken (2013c). Therefore, EPA is approving the ChlordioX 
Plus method for determining chlorine dioxide and chlorite in drinking 
water. A copy of the method can be obtained by contacting Palintest 
Ltd, 1455 Jamike Avenue (Suite 100), Erlanger, KY 41018.
    4. Veolia Water Solutions and Technologies Tecta EC/TC Method--
Presence/Absence Method for the Simultaneous Detection of Total 
Coliforms and Escherichia coli (E. coli) in Drinking Water (Veolia 
2014a). Tecta EC/TC is a microbiological method for the simultaneous 
detection of total coliforms and E. coli in drinking water by broth 
enrichment of samples. Total coliforms and E. coli are detected as 
being present or absent in 100 mL samples of drinking water by 
enzymatic cleavage of fluorogenic substances with the formation of 
fluorescent compounds after incubation. Approved drinking water methods 
for total coliforms are listed at 40 CFR 141.21(f)(3) under the Total 
Coliform Rule (TCR) and at 40 CFR 141.852(a)(5) under the Revisions to 
the Total Coliform Rule (RTCR). Methods approved for E. coli in 
drinking water are listed at 40 CFR 141.21(f)(6) under the TCR, at 40 
CFR 141.402(c)(2) under the Ground Water Rule (GWR), and at 40 CFR 
141.852(a)(5) under the RTCR. Tecta EC/TC is similar to other approved 
drinking water methods except that it uses hydrophobic fluorogens for 
total coliforms and E. coli which adhere to a hydrophobic plastic stub. 
These fluorogens emit fluorescent light into the interior of the stub 
when illuminated by ultraviolet light. The fluorescence from the 
fluorogens is detected by a photometer adjacent to the stub. The 
incubation temperature maintenance, incubation timing, and fluorescence 
detection and results recording are all performed by an automated 
instrument. Tecta EC/TC is able to detect total coliforms and E. coli 
in 18 hours. Reagents and sample incubation containers are available, 
which can be used with the Tecta EC/TC incubator/detector. An 
Alternative Test Procedure (ATP) study was conducted to compare the 
method performance of Tecta EC/TC to the performance of the approved 
methods Standard Methods 9221 B (LTB/BGLB for total coliforms) and 9221 
F (LTB/EC-MUG for E. coli) (APHA 1998). The comparison study involved 
analyses of 200 drinking water samples--20 replicate samples that were 
inoculated with very low densities of chlorine-stressed total coliforms 
or E. coli obtained from 10 geographically dispersed waste waters. 
Method specificity was evaluated using approximately 100 positive and 
100 negative cultures as determined from analyses by the reference 
methods. The ATP validation study report (Veolia 2014b) details the 
study design and method data evaluation. EPA has determined that Tecta 
EC/TC is equally effective relative to the approved Standard Method 
9221 B for total coliforms under the TCR and RTCR, and Standard Method 
9221 F for E. coli under the TCR, GWR, and RTCR. The basis for this 
determination is discussed in Sinclair (2014). Therefore, EPA is 
approving the Tecta EC/TC method for determining total coliforms and E. 
coli in drinking water. Tecta EC/TC is an automated and self-contained 
method, but is subject to the requirements for certified laboratories 
described in CFR 141.28.
    A copy of the Tecta EC/TC method is available from Veolia Water 
Solutions

[[Page 35085]]

and Technologies, Suite 4697, Biosciences Complex, 116 Barrie Street, 
Kingston, Ontario, Canada K7L 3N6.

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

American Public Health Association (APHA). 1994. Standard Method 
6251 B-94. Disinfection By-Products: Haloacetic Acids and 
Trichlorophenol. Micro Liquid--Liquid Extraction Gas Chromatographic 
Method. Approved by Standard Methods Committee 1994. Standard 
Methods Online. (Available at http://www.standardmethods.org.)
American Public Health Association (APHA). 1998. 20th 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). 1999. Standard Method 
3113 B-99. Electrothermal Atomic Absorption Spectrometric Method. 
Approved by Standard Methods Committee 1999. Standard Methods 
Online. (Available at http://www.standardmethods.org.)
American Public Health Association (APHA). 2000a. Standard Method 
2550-00. Temperature. Approved by Standard Methods Committee 2000. 
Standard Methods Online. (Available at http://www.standardmethods.org.)
American Public Health Association (APHA). 2000b. Standard Method 
5910 B-00. UV-Absorbing Organic Constituents. Ultraviolet Absorption 
Method. Approved by Standard Methods Committee 2000. Standard 
Methods Online. (Available at http://www.standardmethods.org.)
American Public Health Association (APHA). 2004a. Standard Method 
9223 B-04. Enzyme Substrate Test. Approved by Standard Methods 
Committee 2004. Standard Methods Online. (Available at http://www.standardmethods.org.)
American Public Health Association (APHA). 2004b. Standard Method 
9215 B-04. Heterotrophic Plate Count--Pour Plate Method. Approved by 
Standard Methods Committee 2004. Standard Methods Online. (Available 
at http://www.standardmethods.org.)
American Public Health Association (APHA). 2005a. Standard Method 
6651 B-05. Glyphosate Herbicide--Liquid Chromatographic Post-Column 
Fluorescence Method. Approved by Standard Methods Committee 2005. 
Standard Methods Online. (Available at http://www.standardmethods.org.)
American Public Health Association (APHA). 2005b. 21st 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). 2006a. Standard Method 
6640 B-06. Acidic Herbicide Compounds--Micro Liquid--Liquid 
Extraction Gas Chromatographic Method. Approved by Standard Methods 
Committee 2006. Standard Methods Online. (Available at http://www.standardmethods.org.)
American Public Health Association (APHA). 2006b. Standard Method 
9221 A-06. Multiple-Tube Fermentation Technique for Members of the 
Coliform Group--Introduction. Approved by Standard Methods Committee 
2006. Standard Methods Online. (Available at http://www.standardmethods.org.)
American Public Health Association (APHA). 2006c. Standard Method 
9221 B-06. Standard Total Coliform Fermentation Technique. Approved 
by Standard Methods Committee 2006. Standard Methods Online. 
(Available at http://www.standardmethods.org.)
American Public Health Association (APHA). 2006d. Standard Method 
9221 C-06. Estimation of Bacterial Density. Approved by Standard 
Methods Committee 2006. Standard Methods Online. (Available at 
http://www.standardmethods.org.)
American Public Health Association (APHA). 2006e. Standard Method 
9221 E-06. Fecal Coliform Procedure. Approved by Standard Methods 
Committee 2006. Standard Methods Online. (Available at http://www.standardmethods.org.)
American Public Health Association (APHA). 2006f. Standard Method 
9221 F-06. Escherichia coli Procedure Using Fluorogenic Substrate. 
Approved by Standard Methods Committee 2006. Standard Methods 
Online. (Available at http://www.standardmethods.org.)
American Public Health Association (APHA). 2006g. Standard Method 
9222 D-06. Thermotolerant (Fecal) Coliform Membrane Filter 
Procedure. Approved by Standard Methods Committee 2006. Standard 
Methods Online. (Available at http://www.standardmethods.org.)
American Public Health Association (APHA). 2007. Standard Method 
6251 B-07. Disinfection By-Products: Haloacetic Acids and 
Trichlorophenol. Micro Liquid--Liquid Extraction Gas Chromatographic 
Method. Approved by Standard Methods Committee 2007. Standard 
Methods Online. (Available at http://www.standardmethods.org.)
American Public Health Association (APHA). 2010a. Standard Method 
2550-10. Temperature. Approved by Standard Methods Committee 2010. 
Standard Methods Online. (Available at http://www.standardmethods.org.)
American Public Health Association (APHA). 2010b. Standard Method 
3113 B-10. Electrothermal Atomic Absorption Spectrometric Method. 
Approved by Standard Methods Committee 2010. Standard Methods 
Online. (Available at http://www.standardmethods.org.)
American Public Health Association (APHA). 2011. Standard Method 
5910 B-11. UV-Absorbing Organic Constituents. Ultraviolet Absorption 
Method. Approved by Standard Methods Committee 2011. Standard 
Methods Online. (Available at http://www.standardmethods.org.)
ASTM International. 1989. ASTM D512-89 B (reapproved 1999). Standard 
Test Methods for Chloride Ion in Water--Silver Nitrate Titration. 
ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 
19428-2959. (Available at http://www.astm.org.)
ASTM International. 2002. ASTM D3223-02. Standard Test Method for 
Total Mercury in Water. ASTM International, 100 Barr Harbor Drive, 
West Conshohocken, PA 19428-2959. (Available at http://www.astm.org.)
ASTM International. 2003. ASTM D4327-03. Standard Test Method for 
Anions in Water by Chemically Suppressed Ion Chromatography. ASTM 
International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-
2959. (Available at http://www.astm.org.)
ASTM International. 2011. ASTM D4327-11. Standard Test Method for 
Anions in Water by Suppressed Ion Chromatography. ASTM 
International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-
2959. (Available at http://www.astm.org.)
ASTM International. 2012a. ASTM D512-12 B. Standard Test Methods for 
Chloride Ion in Water--Silver Nitrate Titration. ASTM International, 
100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. (Available 
at http://www.astm.org.)
ASTM International. 2012b. ASTM D3223-12. Standard Test Method for 
Total Mercury in Water. ASTM International, 100 Barr Harbor Drive, 
West Conshohocken, PA 19428-2959. (Available at http://www.astm.org.)
Dougherty, C. C. 1996. Letter to Joe O'Donnell, Senior Regulatory 
Affairs Specialist, IDEXX Laboratories, Inc., Sept. 10, 1996.
Hach Company. 2013a. Hach Company 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.)

[[Page 35086]]

Hach Company. 2013b. Hach Company Method 10260--Alternate Test 
Procedure (ATP) Validation Study Report for Free and Total Chlorine 
using Disposable ``Planar'' Reagent-Filled Cuvettes. August 2013. 
5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539. (Available 
at http://www.hach.com.)
Palintest Ltd. 2013. Palintest ChlordioX Plus Method--Chlorine 
Dioxide and Chlorite in Drinking Water by Amperometry using 
Disposable Sensors. November 2013. 1455 Jamike Avenue (Suite 100), 
Erlanger, KY 41018.
Sinclair, J. 2014. Memo to the record describing basis for expedited 
approval of Tecta EC/TC. April 9, 2014.
Smith, G. 2013. Memo to the record describing basis for expedited 
approval of updated methods from ASTM International. December 1, 
2013.
Smith, G. and Wendelken, S. 2013a. Memo to the record describing 
basis for expedited approval of online Standard Methods. December 3, 
2013.
Smith, G. and Wendelken, S. 2013b. Memo to the record describing 
basis for expedited approval of Hach Company Method 10260 for 
determination of chlorinated oxidants (free and total) in water 
using disposable planar reagent-filled cuvettes and mesofluidic 
channel colorimetry. November 4, 2013.
Smith, G. and Wendelken, S. 2013c. Memo to the record describing 
basis for expedited approval of Palintest Ltd. ChlordioX Plus 
Method. November 20, 2013.
USEPA. 2000. EPA Method 515.4, Revision 1.0, ``Determination of 
Chlorinated Acids in Drinking Water by Liquid-Liquid 
Microextraction, Derivatization and Fast Gas Chromatography with 
Electron Capture Detection,'' EPA/815/B-00/001, April 2000. 
(Available at https://www.nemi.gov.)
USEPA. 2013. National Primary Drinking Water Regulations: Revisions 
to the Total Coliform Rule; Final Rule. 78 FR 10270. February 13, 
2013.
Veolia. 2014a. Presence/Absence Method for Simultaneous Detection of 
Total Coliforms and Escherichia coli (E. coli) in Drinking Water. 
April 2014. Veolia Water Solutions and Technologies, Suite 4697, 
Biosciences Complex, 116 Barrie Street, Kingston, Ontario, Canada, 
K7L 3N6.
Veolia. 2014b. ATP Study Report for the Proposed US EPA Approval of 
ENDETEC (Tecta EC/TC), an Automated Method for Detecting Total 
Coliforms and E. coli in Drinking Water, under the USEPA 
Microbiological Alternate Test Procedure (ATP) Study Report ATP Case 
Number D11-0005. Originally submitted June 12, 2013, revised January 
30, 2014. Veolia Water Solutions and Technologies, Suite 4697, 
Biosciences Complex, 116 Barrie Street, Kingston, Ontario, Canada 
K7L 3N6.

List of Subjects in 40 CFR Part 141

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

    Dated: June 3, 2014.
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 the table entitled ``ALTERNATIVE TESTING METHODS FOR 
CONTAMINANTS LISTED AT 40 CFR 141.21(f)(3).''
0
b. By revising the table entitled ``ALTERNATIVE TESTING METHODS FOR 
CONTAMINANTS LISTED AT 40 CFR 141.21(f)(5)''.
0
c. By revising the table entitled ``ALTERNATIVE TESTING METHODS FOR 
CONTAMINANTS LISTED AT 40 CFR 141.21(f)(6).''
0
d. By revising entries for ``Antimony,'' ``Arsenic,'' ``Barium,'' 
``Beryllium,'' ``Cadmium,'' ``Chromium,'' ``Copper,'' ``Fluoride,'' 
``Lead,'' ``Mercury,'' ``Nickel,'' ``Nitrate,'' ``Nitrite,'' 
``Orthophosphate,'' ``Selenium,'' and ``Temperature'' in the table 
entitled ``ALTERNATIVE TESTING METHODS FOR CONTAMINANTS LISTED AT 40 
CFR 141.23(k)(1).''
0
e. By revising entries for ``2,4-D,'' ``2,4,5-TP (Silvex),'' 
``Dalapon,'' ``Dinoseb,'' ``Glyphosate,'' ``Pentachlorophenol,'' and 
``Picloram'' in the table entitled ``ALTERNATIVE TESTING METHODS FOR 
CONTAMINANTS LISTED AT 40 CFR 141.24(e)(1).''
0
f. By revising the table entitled ``ALTERNATIVE TESTING METHODS FOR 
CONTAMINANTS LISTED AT 40 CFR 141.74(a)(1).''
0
g. By revising entries for ``Free Chlorine,'' ``Total Chlorine,'' and 
``Chlorine Dioxide'' in the table entitled ``ALTERNATIVE TESTING 
METHODS FOR DISINFECTANT RESIDUALS LISTED AT 40 CFR 141.74(a)(2).''
0
h. By revising the table entitled ``ALTERNATIVE TESTING METHODS FOR 
CONTAMINANTS LISTED AT 40 CFR 141.131(b)(1).''
0
i. By revising the table entitled ``ALTERNATIVE TESTING METHODS FOR 
DISINFECTANT RESIDUALS LISTED AT 40 CFR 141.131(c)(1).''
0
j. By revising the table entitled ``ALTERNATIVE TESTING METHODS FOR 
PARAMETERS LISTED AT 40 CFR 141.131(d).''
0
k. By revising the entry for ``E. coli'' in the table entitled 
``ALTERNATIVE TESTING METHODS FOR CONTAMINANTS LISTED AT 40 CFR 
141.402(c)(2).''
0
l. By revising the table entitled ``ALTERNATIVE TESTING METHODS FOR 
CONTAMINANTS LISTED AT 40 CFR 141.852(a)(5)''.
0
m. By revising entries for ``Aluminum,'' ``Chloride,'' ``Iron,'' 
``Manganese,'' ``Silver,'' and ``Sulfate'' in the table entitled 
``ALTERNATIVE TESTING METHODS FOR CONTAMINANTS LISTED AT 40 CFR 
143.4(b).''
0
n. By revising footnotes 17 and 23.
0
o. By adding footnotes 31 through 33 to the table.
    The additions and revisions 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 141.21(f)(3)
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                               SM 22nd Edition
             Organism                  Methodology      SM 21st Edition \1\          \28\            SM Online \3\                   Other
--------------------------------------------------------------------------------------------------------------------------------------------------------
Total Coliforms..................  Total Coliform       9221 A, B..........  9221 A, B..........  9221 A,B-06........  .................................
                                    Fermentation
                                    Technique.
                                   Total Coliform       9222 A, B, C.......  ...................  ...................  .................................
                                    Membrane Filter
                                    Technique.

[[Page 35087]]

 
                                   Presence-Absence (P- 9221 D.............  ...................  ...................  .................................
                                    A) Coliform Test.
                                   ONPG-MUG Test......  9223...............  9223 B.............  9223 B-04..........  .................................
                                   Colitag TM.........  ...................  ...................  ...................  Modified ColitagTM \13\
                                   Tecta EC/TC \33\...  ...................  ...................  ...................  .................................
--------------------------------------------------------------------------------------------------------------------------------------------------------

                   Alternative Testing Methods for Contaminants Listed at 40 CFR 141.21(f)(5)
----------------------------------------------------------------------------------------------------------------
                Organism                         Methodology            SM 22nd Edition \28\      SM Online \3\
----------------------------------------------------------------------------------------------------------------
Fecal Coliforms........................  Fecal Coliform Procedure..  9221 E....................       9221 E-06
----------------------------------------------------------------------------------------------------------------

                                       Alternative Testing Methods for Contaminants Listed at 40 CFR 141.21(f)(6)
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                     SM 20th          SM 21st          SM 22nd
           Organism               Methodology      Edition \6\      Edition \1\      Edition \28\       SM Online \3\                  Other
--------------------------------------------------------------------------------------------------------------------------------------------------------
E.coli.......................  ONPG-MUG Test...          9223 B           9223 B           9223 B        9223 B-97, B-04   .............................
                               Colitag TM......  ...............  ...............  ...............  .....................  Modified ColitagTM \13\
                               Tecta EC/TC \33\  ...............  ...............  ...............  .....................  .............................
--------------------------------------------------------------------------------------------------------------------------------------------------------

                                       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......  ...............
                                Absorption.
                               Atomic            ................  3113 B..........  3113 B..........  3113 B-04, B-10  ...............  ...............
                                Absorption;
                                Furnace.
                               Axially viewed    200.5, Revision   ................  ................  ...............  ...............  ...............
                                inductively       4.2 \2\.
                                coupled plasma-
                                atomic emission
                                spectrometry
                                (AVICP-AES).
Arsenic......................  Atomic            ................  3113 B..........  3113 B..........  3113 B-04, B-10  D 2972-08 C....  ...............
                                Absorption;
                                Furnace.
                               Hydride Atomic    ................  3114 B..........  3114 B..........  3114 B-09......  D 2972-08 B....  ...............
                                Absorption.
                               Axially viewed    200.5, Revision   ................  ................  ...............  ...............  ...............
                                inductively       4.2 \2\.
                                coupled plasma-
                                atomic emission
                                spectrometry
                                (AVICP-AES).
Barium.......................  Inductively       ................  3120 B..........  3120 B..........  ...............  ...............  ...............
                                Coupled Plasma.
                               Atomic            ................  3111 D..........  3111 D..........  ...............  ...............  ...............
                                Absorption;
                                Direct.
                               Atomic            ................  3113 B..........  3113 B..........  3113 B-04, B-10  ...............  ...............
                                Absorption;
                                Furnace.
                               Axially viewed    200.5, Revision   ................  ................  ...............  ...............  ...............
                                inductively       4.2 \2\.
                                coupled plasma-
                                atomic emission
                                spectrometry
                                (AVICP-AES).

[[Page 35088]]

 
Beryllium....................  Inductively       ................  3120 B..........  3120 B..........  ...............  ...............  ...............
                                Coupled Plasma.
                               Atomic            ................  3113 B..........  3113 B..........  3113 B-04, B-10  D 3645-08 B....  ...............
                                Absorption;
                                Furnace.
                               Axially viewed    200.5, Revision   ................  ................  ...............  ...............  ...............
                                inductively       4.2 \2\.
                                coupled plasma-
                                atomic emission
                                spectrometry
                                (AVICP-AES).
Cadmium......................  Atomic            ................  3113 B..........  3113 B..........  3113 B-04, B-10  ...............  ...............
                                Absorption;
                                Furnace.
                               Axially viewed    200.5, Revision   ................  ................  ...............  ...............  ...............
                                inductively       4.2 \2\.
                                coupled plasma-
                                atomic emission
                                spectrometry
                                (AVICP-AES).
 
                                                                      * * * * * * *
Chromium.....................  Inductively       ................  3120 B..........  3120 B..........  ...............  ...............  ...............
                                Coupled Plasma.
                               Atomic            ................  3113 B..........  3113 B..........  3113 B-04, B-10  ...............  ...............
                                Absorption;
                                Furnace.
                               Axially viewed    200.5, Revision   ................  ................  ...............  ...............  ...............
                                inductively       4.2 \2\.
                                coupled plasma-
                                atomic emission
                                spectrometry
                                (AVICP-AES).
Copper.......................  Atomic            ................  3113 B..........  3113 B..........  3113 B-04, B-10  D 1688-07 C....  ...............
                                Absorption;
                                Furnace.
                               Atomic            ................  3111 B..........  3111 B..........  ...............  D 1688-07 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).
 
                                                                      * * * * * * *
Fluoride.....................  Ion               ................  4110 B..........  4110 B..........  ...............  D 4327-11......  ...............
                                Chromatography.
                               Manual            ................  4500-F- B, D....  4500-F- B, D....  ...............  ...............  ...............
                                Distillation;
                                Colorimetric
                                SPADNS.
                               Manual Electrode  ................  4500-F- C.......  4500-F- C.......  ...............  D 1179-04, 10 B  ...............
                               Automated         ................  4500-F- E.......  4500-F- E.......  ...............  ...............  ...............
                                Alizarin.
                               Arsenite-Free     ................  ................  ................  ...............  ...............  Hach SPADNS 2
                                Colorimetric                                                                                              Method 10225
                                SPADNS.                                                                                                   \22\
Lead.........................  Atomic            ................  3113 B..........  3113 B..........  3113 B-04, B-10  D 3559-08 D....  ...............
                                Absorption;
                                Furnace.

[[Page 35089]]

 
                               Axially viewed    200.5, Revision   ................  ................  ...............  ...............  ...............
                                inductively       4.2 \2\.
                                coupled plasma-
                                atomic emission
                                spectrometry
                                (AVICP-AES).
 
                                                                      * * * * * * *
Mercury......................  Manual, Cold      ................  3112 B..........  3112 B..........  3112 B-09......  D 3223-12......  ...............
                                Vapor.
Nickel.......................  Inductively       ................  3120 B..........  3120 B..........  ...............  ...............  ...............
                                Coupled Plasma.
                               Atomic            ................  3111 B..........  3111 B..........  ...............  ...............  ...............
                                Absorption;
                                Direct.
                               Atomic            ................  3113 B..........  3113 B..........  3113 B-04, B-10  ...............  ...............
                                Absorption;
                                Furnace.
                               Axially viewed    200.5, Revision   ................  ................  ...............  ...............  ...............
                                inductively       4.2 \2\.
                                coupled plasma-
                                atomic emission
                                spectrometry
                                (AVICP-AES).
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\
                               Colorimetric;     ................  ................  ................  ...............  ...............  Hach
                                Direct.                                                                                                   TNTplus\TM\
                                                                                                                                          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\
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....  ...............  ...............
                                Automated,
                                Ascorbic Acid.
 
                                                                      * * * * * * *
Selenium.....................  Hydride-Atomic    ................  3114 B..........  3114 B..........  3114 B-09......  D 3859-08 A....  ...............
                                Absorption.
                               Atomic            ................  3113 B..........  3113 B..........  3113 B-04, B-10  D 3859-08 B....  ...............
                                Absorption;
                                Furnace.

[[Page 35090]]

 
                               Axially viewed    200.5, Revision   ................  ................  ...............  ...............  ...............
                                inductively       4.2 \2\.
                                coupled plasma-
                                atomic emission
                                spectrometry
                                (AVICP-AES).
 
                                                                      * * * * * * *
Temperature..................  Thermometric....  ................  2550............  2550............  2550-10........  ...............  ...............
--------------------------------------------------------------------------------------------------------------------------------------------------------

                   Alternative Testing Methods for Contaminants Listed at 40 CFR 141.24 (e)(1)
----------------------------------------------------------------------------------------------------------------
                                                             SM 21st  Edition   SM 22nd Edition
         Contaminant              Methodology    EPA method         \1\              \28\         SM Online \3\
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
2,4-D........................  Gas               ..........  6640 B..........  6640 B..........  6640 B-01, B-
                                Chromatography/                                                   06.
                                Electron
                                Capture
                                Detection (GC/
                                ECD).
2,4,5-TP (Silvex)............  Gas               ..........  6640 B..........  6640 B..........  6640 B-01, B-
                                Chromatography/                                                   06.
                                Electron
                                Capture
                                Detection (GC/
                                ECD).
 
                                                  * * * * * * *
Dalapon......................  Ion               557 \14\..  ................  ................  ...............
                                Chromatography
                                Electrospray
                                Ionization
                                Tandem Mass
                                Spectrometry
                                (IC-ESI-MS/MS).
                               Gas               ..........  6640 B..........  6640 B..........  6640 B-01, B-
                                Chromatography/                                                   06.
                                Electron
                                Capture
                                Detection (GC/
                                ECD).
 
                                                  * * * * * * *
Dinoseb......................  Gas               ..........  6640 B..........  6640 B..........  6640 B-01, B-
                                Chromatography/                                                   06.
                                Electron
                                Capture
                                Detection (GC/
                                ECD).
 
                                                  * * * * * * *
Glyphosate...................  High-Performance  ..........  6651 B..........  6651 B..........  6651 B-00, B-
                                Liquid                                                            05.
                                Chromatography
                                (HPLC) with
                                Post-Column
                                Derivatization
                                and
                                Fluorescence
                                Detection.
 
                                                  * * * * * * *
Pentachlorophenol............  Gas               ..........  6640 B..........  6640 B..........  6640 B-01, B-
                                Chromatography/                                                   06.
                                Electron
                                Capture
                                Detection (GC/
                                ECD).
                               Solid Phase       525.3 \24\  ................  ................  ...............
                                Extraction/Gas
                                Chromatography/
                                Mass
                                Spectrometry
                                (GC/MS).
Picloram.....................  Gas               ..........  6640 B..........  6640 B..........  6640 B-01, B-
                                Chromatography/                                                   06.
                                Electron
                                Capture
                                Detection (GC/
                                ECD).
 
                                                  * * * * * * *
----------------------------------------------------------------------------------------------------------------

* * * * *

                                       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
--------------------------------------------------------------------------------------------------------------------------------------------------------
Total Coliform....................  Total Coliform         9221 A, B, C........  9221 A, B, C........  9221 A,B,C-06.......  ...........................
                                     Fermentation
                                     Technique.
                                    Total Coliform         9222 A, B, C........  ....................  ....................  ...........................
                                     Membrane Filter
                                     Technique.
                                    ONPG-MUG Test........  9223................  9223 B..............  9223 B-04...........  ...........................
Fecal Coliforms...................  Fecal Coliform         9221 E..............  9221 E..............  9221 E-06...........  ...........................
                                     Procedure.

[[Page 35091]]

 
                                    Fecal Coliform Filter  9222 D..............  9222 D..............  9222 D-06...........  ...........................
                                     Procedure.
Heterotrophic bacteria............  Pour Plate Method....  9215 B..............  9215 B..............  9215 B-04...........  ...........................
Turbidity.........................  Nephelometric Method.  2130 B..............  2130 B..............  ....................  ...........................
                                    Laser Nephelometry     ....................  ....................  ....................  Mitchell M5271.\10\
                                     (on-line).
                                    LED Nephelometry (on-  ....................  ....................  ....................  Mitchell M5331.\11\
                                     line).
                                    LED Nephelometry (on-  ....................  ....................  ....................  AMI Turbiwell\.15\
                                     line).
                                    LED Nephelometry       ....................  ....................  ....................  Orion AQ4500.\12\
                                     (portable).
--------------------------------------------------------------------------------------------------------------------------------------------------------

                                  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...........  ...........................
                                     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 Sensor..  ....................  ....................  ....................  ChloroSense.\17\
Total Chlorine....................  Amperometric           4500-Cl D...........  4500-Cl D...........  D 1253-08...........  ...........................
                                     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 Electrode.  4500-Cl I...........  4500-Cl I...........  ....................  ...........................
                                    On-line Chlorine       ....................  ....................  ....................  EPA 334.0.\16\
                                     Analyzer.
                                    Amperometric Sensor..  ....................  ....................  ....................  ChloroSense.\17\
Chlorine Dioxide..................  Amperometric           4500-ClO2 C.........  4500-ClO2 C.........  ....................  ...........................
                                     Titration.
                                    Amperometric           4500-ClO2 E.........  4500-ClO2 E.........  ....................  ...........................
                                     Titration.
                                    Amperometric Sensor..  ....................  ....................  ....................  ChlordioX Plus.\32\
 
                                                                      * * * * * * *
--------------------------------------------------------------------------------------------------------------------------------------------------------

                                       Alternative Testing Methods for Contaminants Listed at 40 CFR 141.131(b)(1)
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                                           SM 21st          SM 22nd
         Contaminant              Methodology       EPA Method         ASTM \4\        SM Online \3\     Edition \1\      Edition \28\        Other
--------------------------------------------------------------------------------------------------------------------------------------------------------
TTHM.........................  P&T/GC/MS.......  524.3 \9\, 524.4  ................  ................  ...............  ...............  ...............
                                                  \29\.
HAA5.........................  LLE               ................  ................  6251 B-07.......  6251 B.........  6251 B.........  ...............
                                (diazomethane)/
                                GC/ECD.
                               Ion               557 \14\........  ................  ................  ...............  ...............  ...............
                                Chromatography
                                Electrospray
                                Ionization
                                Tandem Mass
                                Spectrometry
                                (IC-ESI-MS/MS).
Bromate......................  Two-Dimensional   302.0 \18\......  ................  ................  ...............  ...............  ...............
                                Ion
                                Chromatography
                                (IC).

[[Page 35092]]

 
                               Ion               557 \14\........  ................  ................  ...............  ...............  ...............
                                Chromatography
                                Electrospray
                                Ionization
                                Tandem Mass
                                Spectrometry
                                (IC-ESI-MS/MS).
                               Chemically        ................  D 6581-08 A.....  ................  ...............  ...............  ...............
                                Suppressed Ion
                                Chromatography.
                               Electrolytically  ................  D 6581-08 B.....  ................  ...............  ...............  ...............
                                Suppressed Ion
                                Chromatography.
Chlorite.....................  Chemically        ................  D 6581-08 A.....  ................  ...............  ...............  ...............
                                Suppressed Ion
                                Chromatography.
                               Electrolytically  ................  D 6581-08 B.....  ................  ...............  ...............  ...............
                                Suppressed Ion
                                Chromatography.
Chlorite--daily monitoring as  Amperometric      ................  ................  ................  4500-ClO2 E....  4500-ClO2 E....  ...............
 prescribed in 40 CFR           Titration.
 141.132(b)(2)(i)(A).
                               Amperometric      ................  ................  ................  ...............  ...............  ChlordioX
                                Sensor.                                                                                                   Plus.\32\
--------------------------------------------------------------------------------------------------------------------------------------------------------

                                  Alternative Testing Methods for Disinfectant Residuals Listed at 40 CFR 141.131(c)(1)
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                               SM 22nd Edition
             Residual                  Methodology      SM 21st Edition \1\          \28\               ASTM \4\                     Other
--------------------------------------------------------------------------------------------------------------------------------------------------------
Free Chlorine....................  Amperometric         4500-Cl D..........  4500-Cl D..........  D 1253-08..........  .................................
                                    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 Sensor  ...................  ...................  ...................  ChloroSense \17\.
                                   On-line Chlorine     ...................  ...................  ...................  EPA 334.0 \16\.
                                    Analyzer.
Combined Chlorine................  Amperometric         4500-Cl D..........  4500-Cl D..........  D 1253-08..........  .................................
                                    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..........  .................................
                                    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 Sensor  ...................  ...................  ...................  ChloroSense \17\.
                                   On-line Chlorine     ...................  ...................  ...................  EPA 334.0 \16\.
                                    Analyzer.
Chlorine Dioxide.................  Amperometric Method  4500-ClO2 E........  4500-ClO2 E........  ...................  .................................
                                    II.
                                   Amperometric Sensor  ...................  ...................  ...................  ChlordioX Plus \32\.
--------------------------------------------------------------------------------------------------------------------------------------------------------

[[Page 35093]]

* * * * *

                                         Alternative Testing Methods for Parameters Listed at 40 CFR 141.131(d)
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                               SM 22nd Edition
            Parameter                  Methodology      SM 21st Edition \1\          \28\            SM Online \3\                    EPA
--------------------------------------------------------------------------------------------------------------------------------------------------------
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\.
                                    Ultraviolet or
                                    Heated Persulfate
                                    Oxidation.
                                   Wet Oxidation......  5310 D.............  5310 D.............  ...................  415.3, Rev 1.2 \19\.
Specific Ultraviolet Absorbance    Calculation using    ...................  ...................  ...................  415.3, Rev 1.2 \19\.
 (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 nm   Spectrophotometry..  5910 B.............  5910 B.............  5910 B-11..........  415.3, Rev 1.2 \19\.
 (UV254).
--------------------------------------------------------------------------------------------------------------------------------------------------------

* * * * *

                                       Alternative Testing Methods for Contaminants Listed at 40 CFR 141.402(c)(2)
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                   SM 20th Edition       SM 21st      SM 22nd  Edition
           Organism                Methodology           \6\           Edition\1\           \28\          SM Online \3\                Other
--------------------------------------------------------------------------------------------------------------------------------------------------------
E. coli.......................  Colilert[supreg]  ................  9223 B..........  9223 B..........  9223 B-97, B-04.  ..............................
                                Colisure[supreg]  ................  9223 B..........  9223 B..........  9223 B-97, B-04.  ..............................
                                Colilert-18.....  9223 B..........  9223 B..........  9223 B..........  9223 B-97, B-04.  ..............................
                                Readycult[supreg  ................  ................  ................  ................  Readycult[supreg] \20\.
                                 ].
                                Colitag.........  ................  ................  ................  ................  Modified ColitagTM \13\.
                                Chromocult[supre  ................  ................  ................  ................  Chromocult[supreg] \21\.
                                 g].
                                EC-MUG..........  ................  ................  9221 F..........  9221 F-06.......  ..............................
                                Tecta EC/TC \33\  ................  ................  ................  ................  ..............................
 
                                                                      * * * * * * *
--------------------------------------------------------------------------------------------------------------------------------------------------------

* * * * *

                                       Alternative Testing Methods for Contaminants Listed at 40 CFR 141.852(a)(5)
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                       Methodology                              SM 20th, 21st       SM 22nd Edition
             Organism                    Category              Method           Editions \1,6\            \28\                   SM Online \3\
--------------------------------------------------------------------------------------------------------------------------------------------------------
Total Coliforms..................  Lactose              Standard Total       ...................  9221 B.1, B.2......  9221 B.1, B.2-06.
                                    Fermentation         Coliform
                                    Methods.             Fermentation
                                                         Technique.
                                   Enzyme Substrate     Colilert[supreg]...  ...................  9223 B.............  9223 B-04.
                                    Methods.
                                   Colilert-18........  Colisure[supreg]...  ...................  9223 B.............  9223 B-04.
                                   ...................  Tecta EC/TC \33\...  ...................  ...................  .................................
Escherichia coli.................  Escherichia coli     EC-MUG medium......  ...................  9221 F.1...........  9221 F.1-06.
                                    Procedure
                                    (following Lactose
                                    Fermentation
                                    Methods).
                                   Enzyme Substrate     Colilert[supreg]...  ...................  9223 B.............  9223 B-04.
                                    Methods.
                                   ...................  Colisure[supreg]...  ...................  9223 B.............  9223 B-04.
                                   ...................  Colilert-18[supreg]  9223 B.............  9223 B.............  9223 B-04.
                                   ...................  Tecta EC/TC \33\...  ...................  ...................  .................................
--------------------------------------------------------------------------------------------------------------------------------------------------------

[[Page 35094]]

                                         Alternative Testing Methods for Contaminants Listed at 40 CFR 143.4(b)
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                       SM 21st Edition  SM 22nd  Edition
          Contaminant              Methodology       EPA Method         ASTM \4\             \1\              \28\                 SM Online \3\
--------------------------------------------------------------------------------------------------------------------------------------------------------
Aluminum......................  Axially viewed    200.5, Revision   ................  ................  ................  ..............................
                                 inductively       4.2 \2\.
                                 coupled plasma-
                                 atomic emission
                                 spectrometry
                                 (AVICP-AES).
                                Atomic            ................  ................  3111 D..........  3111 D..........  ..............................
                                 Absorption;
                                 Direct.
                                Atomic            ................  ................  3113 B..........  3113 B..........  3113 B-04, B-10.
                                 Absorption;
                                 Furnace.
                                Inductively       ................  ................  3120 B..........  3120 B..........  ..............................
                                 Coupled Plasma.
Chloride......................  Silver Nitrate    ................  D 512-04 B, 12 B  4500-Cl- B......  4500-Cl- B......  ..............................
                                 Titration.
                                Ion               ................  D 4327-11.......  4110 B..........  4110 B..........  ..............................
                                 Chromatography.
                                Potentiometric    ................  ................  4500-Cl- D......  4500-Cl- D......  ..............................
                                 Titration.
 
                                                                      * * * * * * *
Iron..........................  Axially viewed    200.5, Revision   ................  ................  ................  ..............................
                                 inductively       4.2 \2\.
                                 coupled plasma-
                                 atomic emission
                                 spectrometry
                                 (AVICP-AES).
                                Atomic            ................  ................  3111 B..........  3111 B..........  ..............................
                                 Absorption;
                                 Direct.
                                Atomic            ................  ................  3113 B..........  3113 B..........  3113 B-04, B-10.
                                 Absorption;
                                 Furnace.
                                Inductively       ................  ................  3120 B..........  3120 B..........  ..............................
                                 Coupled Plasma.
Manganese.....................  Axially viewed    200.5, Revision   ................  ................  ................  ..............................
                                 inductively       4.2 \2\.
                                 coupled plasma-
                                 atomic emission
                                 spectrometry
                                 (AVICP-AES).
                                Atomic            ................  ................  3111 B..........  3111 B..........  ..............................
                                 Absorption;
                                 Direct.
                                Atomic            ................  ................  3113 B..........  3113 B..........  3113 B-04, B-10.
                                 Absorption;
                                 Furnace.
                                Inductively       ................  ................  3120 B..........  3120 B..........  ..............................
                                 Coupled Plasma.
 
                                                                      * * * * * * *
Silver........................  Axially viewed    200.5, Revision   ................  ................  ................  ..............................
                                 inductively       4.2 \2\.
                                 coupled plasma-
                                 atomic emission
                                 spectrometry
                                 (AVICP-AES).
                                Atomic            ................  ................  3111 B..........  3111 B..........  ..............................
                                 Absorption;
                                 Direct.
                                Atomic            ................  ................  3113 B..........  3113 B..........  3113 B-04, B-10.
                                 Absorption;
                                 Furnace.
                                Inductively       ................  ................  3120 B..........  3120 B..........  ..............................
                                 Coupled Plasma.
Sulfate.......................  Ion               ................  D 4327-11.......  4110 B..........  4110 B..........  ..............................
                                 Chromatography.
                                Gravimetric with  ................  ................  4500-SO4 2- C...  4500-SO4 2- C...  4500-SO4 2- C-97
                                 ignition of
                                 residue.

[[Page 35095]]

 
                                Gravimetric with  ................  ................  4500-SO4 2- D...  4500-SO4 2- D...  4500-SO4 2- D-97
                                 drying of
                                 residue.
                                Turbidimetric     ................  D 516-07, 11....  4500-SO4 2- E...  4500-SO4 2- E...  4500-SO4 2- E-97
                                 method.
                                Automated         ................  ................  4500-SO4 2- F...  4500-SO4 2- F...  4500-SO4 2- F-97
                                 methylthymol
                                 blue method.
 
                                                                     * * * * * * *
--------------------------------------------------------------------------------------------------------------------------------------------------------
\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/nerlcwww/ordmeth.htm.)
\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.
* * * * *
\6\ Standard Methods for the Examination of Water and Wastewater, 20th edition (1998). Available from American Public Health Association, 800 I Street
  NW., Washington, DC 20001-3710.
* * * * *
\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 http://water.epa.gov/drink/.
\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.
\13\ Modified ColitagTM Method. ``Modified ColitagTM Test Method for the Simultaneous Detection of E. coli and other Total Coliforms in Water (ATP D05-
  0035),'' August 28, 2009. Available at https://www.nemi.gov or from CPI International, 5580 Skylane Boulevard, Santa Rosa, CA 95403.
\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 http://water.epa.gov/drink/.
\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 http://water.epa.gov/drink/.
\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 http://water.epa.gov/drink/.
\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/nerlcwww/ordmeth.htm.
\20\ Readycult[supreg] Method, ``Readycult[supreg] Coliforms 100 Presence/Absence Test for Detection and Identification of Coliform Bacteria and
  Escherichia coli in Finished Waters,'' January, 2007. Version 1.1. Available from EMD Millipore (division of Merck KGaA, Darmstadt, Germany), 290
  Concord Road, Billerica, MA 01821.
\21\ Chromocult[supreg] Method, ``Chromocult[supreg] Coliform Agar Presence/Absence Membrane Filter Test Method for Detection and Identification of
  Coliform Bacteria and Escherichia coli in Finished Waters,'' November, 2000. Version 1.0. EMD Millipore (division of Merck KGaA, Darmstadt, Germany),
  290 Concord Road, Billerica, MA 01821.
\22\ Hach Company. ``Hach Company SPADNS 2 (Arsenite-Free) Fluoride Method 10225--Spectrophotometric Measurement of Fluoride in Water and Wastewater,''
  January 2011. 5600 Lindbergh Drive, P.O. Box 389, Loveland, Colorado 80539. (Available at http://www.hach.com.)
\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/nerlcwww/ordmeth.htm.
* * * * *
\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 http://water.epa.gov/drink.
* * * * *
\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.)
\32\ ChlordioX Plus. ``Chlorine Dioxide and Chlorite in Drinking Water by Amperometry using Disposable Sensors,'' November 2013. Available from
  Palintest Ltd, Jamike Avenue (Suite 100), Erlanger, KY 41018.
\33\ Tecta EC/TC. ``Presence/Absence Method for Simultaneous Detection of Total Coliforms and Escherichia coli (E. coli) in Drinking Water,'' April
  2014. Available from Veolia Water Solutions and Technologies, Suite 4697, Biosciences Complex, 116 Barrie Street, Kingston, Ontario, Canada K7L 3N6.

[[Page 35096]]

[FR Doc. 2014-14369 Filed 6-18-14; 8:45 am]
BILLING CODE 6560-50-P
```