
[Federal Register: June 8, 2010 (Volume 75, Number 109)]
[Rules and Regulations]               
[Page 32295-32302]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr08jn10-19]                         

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

ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 141

[EPA-HQ-OW-2010-0288; FRL-9160-1]

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

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule.

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

SUMMARY: This action announces the 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 12 additional methods 
available for analyzing drinking water samples required by regulation. 
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 8, 2010.

[[Page 32296]]


FOR FURTHER INFORMATION CONTACT: Safe Drinking Water Hotline (800) 426-
4791 or Glynda Smith, Technical Support Center, 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; e-mail 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 also 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. 
Categories and entities that may ultimately be affected by this action 
include:

------------------------------------------------------------------------
                                       Examples of potentially    NAICS
              Category                   regulated entities        \1\
------------------------------------------------------------------------
State, Local, & Tribal Governments.  States, local and tribal     924110
                                      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-2010-0288. Publicly available docket materials are 
available either electronically through http://www.regulations.gov or 
in hard copy at the Water Docket in the EPA Docket Center, (EPA/DC) EPA 
West, Room 3334, 1301 Constitution Ave., NW., Washington, DC. 
Copyrighted materials are available only in hard copy. The EPA Docket 
Center 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
CFR: Code of Federal Regulations
E. coli: Escherichia coli
EPA: Environmental Protection Agency
GWR: Ground Water Rule
IC-ESI-MS/MS: Ion Chromatography Electrospray Ionization Tandem Mass 
Spectrometry
NAICS: North American Industry Classification System
NEMI: National Environmental Methods Index
QC: Quality Control
SDWA: 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 12 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. The new 
methods are listed in appendix A to subpart C of part 141 and on EPA's 
drinking water methods Web site at http://www.epa.gov/safewater/
methods/analyticalmethods_expedited.html.
    This action also includes the full text of three tables in Appendix 
A to Subpart C of Part 141. The tables do not include any new method 
approvals. EPA inadvertently deleted two table columns in the November 
10, 2009, Federal Register notice (74 FR 57908) (USEPA 2009b). The 
corrected tables are titled:
     Alternative Testing Methods for Disinfectant Residuals 
Listed at 40 CFR 141.74(a)(2),
     Alternative Testing Methods for Contaminants Listed at 40 
CFR 141.131(b)(1), and
     Alternative Testing Methods for Disinfectant Residuals 
Listed at 40 CFR 141.131(c)(1).

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 12 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 equally effective as one or more of the testing methods 
already established in the regulations for those contaminants. Section 
1401(1) states that the newly approved methods ``shall be treated as an 
alternative for public water systems

[[Page 32297]]

to the quality control and testing procedures listed in the 
regulation.'' Accordingly, this action makes these additional (and 
optional) 12 analytical methods legally available 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 this 
Federal Register.
    EPA described this expedited methods approval process in an April 
10, 2007, Federal Register notice (72 FR 17902) (USEPA 2007) and 
announced its intent to begin using the process. EPA published the 
first set of approvals in a June 3, 2008, Federal Register notice (73 
FR 31616) (USEPA 2008) and added appendix A to 40 CFR part 141, subpart 
C. Additional methods were added to appendix A to subpart C in an 
August 3, 2009, Federal Register notice (74 FR 38348) (USEPA 2009a) and 
a November 10, 2009, Federal Register notice (74 FR 57908) (USEPA 
2009b). Future approvals using this process are anticipated.

III. Summary of Approvals

    EPA is approving 12 methods that are equally effective relative to 
methods previously promulgated in the regulations. By means of this 
notice, these 12 methods are added to appendix A to subpart C of part 
141.

A. Methods Developed by EPA

    EPA Method 557 is a direct-injection, ion chromatography, negative-
ion electrospray ionization, tandem mass spectrometry (IC-ESI-MS/MS) 
method for the determination of nine haloacetic acids, dalapon, and 
bromate in finished drinking waters (USEPA 2009c). Each method analyte 
is qualitatively identified via a unique mass transition, and the 
concentration is calculated using the integrated peak area and the 
internal standard technique.
    EPA Method 557 eliminates the labor intensive sample preparation 
steps (extraction and derivatization) that are required in other 
methods. It also reduces the use of solvents and potentially hazardous 
chemicals. The development work for this method is described in the 
method research summary (Zaffiro and Zimmerman 2009). EPA Method 557 
has already been approved for determining haloacetic acids and bromate 
in drinking water (74 FR 57908) (USEPA 2009b); its approval is being 
expanded in this action to include dalapon.
    The approved methods for dalapon are listed at 40 CFR 141.24(e)(1). 
The performance characteristics of EPA Method 557 for dalapon were 
compared to the characteristics of approved EPA Methods 552.2 (USEPA 
1995), 552.3 (USEPA 2003), and 515.4 (USEPA 2000). EPA has determined 
that EPA Method 557 is equally effective for measuring dalapon as each 
one of these three previously approved methods. The basis for this 
determination is discussed in Smith (2010a). Therefore, EPA is 
approving EPA Method 557 for determining dalapon in drinking water and 
adding it to the list of approved methods in appendix A to subpart C of 
part 141 as an alternative method for contaminants listed at 40 CFR 
141.24(e)(1). A copy of EPA Method 557 can be accessed and downloaded 
directly on-line at http://epa.gov/safewater/methods/
analyticalmethods_ogwdw.html.

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

    1. Standard Methods for the Examination of Water and Wastewater. In 
Standard Method 6640 B, chlorinated acids in drinking water are 
derivatized and analyzed using gas chromatography with electron capture 
detection. The method uses the identical sample handling protocols, 
analytical conditions, and quality control (QC) criteria as EPA Method 
515.4 (USEPA 2000), which is approved for analyzing compliance samples 
for dalapon (40 CFR 141.24(e)(1)). EPA has determined that Standard 
Method 6640 B, published in the 21st edition of Standard Methods for 
the Examination of Water and Wastewater (APHA 2005), is equally 
effective relative to EPA Method 515.4 (Smith 2010b) for the analysis 
of compliance samples for dalapon. EPA has also determined that 
Standard Method 6640 B-01 (APHA 2001) is an identical on-line version 
of Standard Method 6640 B. Accordingly, EPA is approving Standard 
Method 6640 B and Standard Method 6640 B-01 for determining dalapon in 
drinking water and adding them to the list of approved methods in 
Appendix A to Subpart C of Part 141 as alternative methods for 
contaminants listed at 40 CFR 141.24(e)(1). The 21st edition can be 
obtained from the American Public Health Association (APHA), 800 I 
Street, NW., Washington, DC 20001-3710. Standard Method 6640 B-01 is 
available at http://www.standardmethods.org.
    2. ASTM International. EPA compared the most recent versions of six 
ASTM International methods for radiochemicals in water to the versions 
of those methods that are already approved under 40 CFR 141.25(a). 
Changes between the approved version and the most recent version of 
each method are summarized in Umbaugh (2010). The revisions primarily 
involve editorial changes (i.e., updated references, definitions, 
terminology, and reorganization of text). The revised methods are the 
same as the approved versions with respect to drinking water sample 
collection and handling protocols, sample preparation, analytical 
methodology, and results. The QC requirements in the revised methods 
have been expanded and are more detailed than in the previous versions. 
EPA has determined that the new versions are equally effective relative 
to those cited in the regulation (ASTM Methods D3454-97, D2460-97, 
D5174-02, D3649-98a, D4785-00a, and D4107-98 (reapproved 2002)) 
(Umbaugh 2010). Therefore, EPA is approving the use of the six updated 
ASTM methods for radiochemicals listed in the following table:

------------------------------------------------------------------------
             ASTM Method                          Contaminant
------------------------------------------------------------------------
D3454-05 (ASTM International 2009a).  Radium-226.
D2460-07 (ASTM International 2009b).  Radium-226.
D5174-07 (ASTM International 2009c).  Uranium.
D3649-06 (ASTM International 2009d).  Radioactive Cesium.
                                      Radioactive Iodine.
                                      Gamma emitters.
D4785-08 (ASTM International 2009e).  Radioactive Iodine.
                                      Gamma emitters.
D4107-08 (ASTM International 2009f).  Tritium.
------------------------------------------------------------------------


[[Page 32298]]

As of today's notice, measurements of radiochemicals in drinking water 
may be performed using either one of these six methods or one of the 
methods already approved at 40 CFR 141.25(a). The six ASTM methods are 
available from ASTM International, 100 Barr Harbor Drive, West 
Conshohocken, PA 19428-2959 or http://www.astm.org.

C. Methods Developed by Vendors

    EPA previously approved by regulation the following alternative 
methods, which are listed at 40 CFR 141.21(f)(6), for determining 
Escherichia coli (E. coli) under the Total Coliform Rule (TCR): 
Readycult[supreg] (EMD Chemicals 2007), Chromocult[supreg] (EM Science 
2000), and Modified Colitag\TM\ (CPI International 2009). These three 
methods were not approved under the Ground Water Rule (GWR) (71 FR 
65574, November 8, 2006) (USEPA 2006), because they were not evaluated 
by EPA prior to proposal of the GWR. However, these methods were 
evaluated under the Alternate Test Procedure (ATP) program and EPA 
determined that the methods were equally effective for E. coli 
determination relative to Standard Method 9221F (Best 2010), published 
in the 20th edition of Standard Methods for the Examination of Water 
and Wastewater (APHA 1998). Standard Method 9221F is approved for E. 
coli determination under the GWR (40 CFR 141.402(c)(2)). EPA is using 
today's notice to approve the use of Readycult[supreg], 
Chromocult[supreg], and Modified Colitag\TM\ to meet E. coli monitoring 
requirements under GWR and is adding them to the list of approved 
methods in appendix A to subpart C of part 141 as alternative methods 
for contaminants listed at 40 CFR 141.402(c)(2).
    The 20th edition of Standard Methods for the Examination of Water 
and Wastewater (1998) is available from the American Public Health 
Association (APHA), 800 I Street, NW., Washington, DC 20001-3710.
    The Readycult[supreg] test is described in the document 
``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 
Chemicals (an affiliate of Merck KGaA, Darmstadt Germany), 480 S. 
Democrat Road, Gibbstown, NJ 08027-1297. (Telephone (800) 222-0342). 
Internet address http://www.readycult.com.
    The Chromocult[supreg] test is described in the document 
``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, 
available from EMD Chemicals (formerly EM Science) (an affiliate of 
Merck KGaA, Darmstadt Germany), 480 S. Democrat Road, Gibbstown, NJ 
08027-1297. (Telephone (800) 222-0342).
    The Modified Colitag[supreg] test is described in the document 
``Modified Colitag\TM\ Test Method for the Simultaneous Detection of E. 
coli and other Total Coliforms in Water,'' August 28, 2009, available 
from CPI International, Inc., 5580 Skylane Blvd., Santa Rosa, CA, 
95403. (Telephone (800) 878-7654, Fax (707) 545-7901). Internet address 
http://www.cpiinternational.com.

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 
(optional) testing methods available 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). 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). 2001. Standard Method 
6640 B-01. Acidic Herbicide Compounds. Micro Liquid-Liquid 
Extraction Gas Chromatographic Method. Approved by Standard Methods 
Committee 2001. Standard Methods Online. (Available at http://
www.standardmethods.org.)
American Public Health Association (APHA). 2005. 21st Edition of 
Standard Methods for the Examination of Water and Wastewater, 
American Public Health Association, 800 I Street, NW., Washington, 
DC 20001-3710.
ASTM International. 2009a. ASTM D 3454-05. Standard Test Method for 
Radium-226 in Water. ASTM International, 100 Barr Harbor Drive, West 
Conshohocken, PA 19428-2959. (Available at http://www.astm.org.)
ASTM International. 2009b. ASTM D 2460-07. Standard Test Method for 
Alpha-Particle-Emitting Isotopes of Radium in Water. ASTM 
International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-
2959. (Available at http://www.astm.org.)
ASTM International. 2009c. ASTM D 5174-07. Standard Test Method for 
Trace Uranium in Water by Pulsed-Laser Phosphorimetry. ASTM 
International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-
2959. (Available at http://www.astm.org.)
ASTM International. 2009d. ASTM D 3649-06. Standard Practice for 
High-Resolution Gamma-Ray Spectrometry in Water. ASTM International, 
100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. (Available 
at http://www.astm.org.)
ASTM International. 2009e. ASTM D 4785-08. Standard Test Method for 
Low-Level Analysis of Iodine Radioisotopes in Water. ASTM 
International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-
2959. (Available at http://www.astm.org.)
ASTM International. 2009f. ASTM D 4107-08. Standard Test Method for 
Tritium in Drinking Water. ASTM International, 100 Barr Harbor 
Drive, West Conshohocken, PA 19428-2959. (Available at http://
www.astm.org.)
Best, J. 2010. Memo to the record describing basis for expedited 
approval of Modified Colitag\TM\, Readycult[supreg], and 
Chromocult[supreg] methods for determining E. coli as specified at 
40 CFR 141.402(c)(2). January 27, 2010.
CPI International. 2009. Modified Colitag\TM\ Method. Modified 
Colitag\TM\ Test Method for the Simultaneous Detection of E. coli 
and other Total Coliforms in Water (ATP D05-0035). August 28, 2009. 
5580 Skylane Boulevard, Santa Rosa, CA 95403.
EMD Chemicals (affiliate of Merck KGaA, Darmstadt, Germany). 2000. 
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. 480 S. Democrat Road, 
Gibbstown, NJ 08027-1297.
EMD Chemicals (affiliate of Merck KGaA, Darmstadt, Germany). 2007. 
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. 
480 S. Democrat Road, Gibbstown, NJ 08027-1297.
Smith, G. 2010a. Memo to the record describing basis for expedited 
approval of EPA Method 557 for the analysis of dalapon. January 19, 
2010.
Smith, G. 2010b. Memo to the record describing basis for expedited 
approval of Standard Method 6640 B and 6640 B-01 for the analysis of 
dalapon. January 27, 2010.
Umbaugh, L. 2010. Memo to the record describing basis for expedited 
approval of ASTM methods for radiochemicals in water. January 21, 
2010.

[[Page 32299]]

USEPA. 1995. EPA Method 552.2, Determination of Haloacetic Acids and 
Dalapon in Drinking Water by Liquid-Liquid Extraction, 
Derivatization and Gas Chromatography with Electron Capture 
Detection in Methods for the Determination of Organic Compounds in 
Drinking Water, Supplement III, EPA/600/R-95-131, August 1995. 
(Available at http://www.nemi.gov.)
USEPA. 2000. EPA Method 515.4, Determination of Chlorinated Acids in 
Drinking Water by Liquid-Liquid Extraction, Derivatization, and Fast 
Gas Chromatography with Electron Capture Detection, EPA 815-B-00-
001, April 2000. (Available at http://www.epa.gov/safewater/methods/
analyticalmethods_ogwdw.html.)
USEPA. 2003. EPA Method 552.3, Determination of Haloacetic Acids and 
Dalapon in Drinking Water by Liquid-Liquid Microextraction, 
Derivatization, and Gas Chromatography with Electron Capture 
Detection, EPA 815-B-03-002, July 2003. (Available at http://
www.epa.gov/safewater/methods/analyticalmethods_ogwdw.html.)
USEPA. 2006. National Primary Drinking Water Regulations: Ground 
Water Rule; Final Rule. 71 FR 65574. November 8, 2006.
USEPA. 2007. Expedited Approval of Test Procedures for the Analysis 
of Contaminants Under the Safe Drinking Water Act; Analysis and 
Sampling Procedures. 72 FR 17902. April 10, 2007.
USEPA. 2008. Expedited Approval of Alternative Test Procedures for 
the Analysis of Contaminants Under the Safe Drinking Water Act; 
Analysis and Sampling Procedures. 73 FR 31616. June 3, 2008.
USEPA. 2009a. Expedited Approval of Alternative Test Procedures for 
the Analysis of Contaminants Under the Safe Drinking Water Act; 
Analysis and Sampling Procedures. 74 FR 38348. August 3, 2009.
USEPA. 2009b. Expedited Approval of Alternative Test Procedures for 
the Analysis of Contaminants Under the Safe Drinking Water Act; 
Analysis and Sampling Procedures. 74 FR 57908. November 10, 2009.
USEPA. 2009c. 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), EPA 
815-B-09-012, September 2009. (Available at http://www.epa.gov/
safewater/methods/analyticalmethods_ogwdw.html.)
    Zaffiro, A.D. and Zimmerman, M. 2009. EPA Method 557 Research 
Summary, Shaw Environmental Inc., Cincinnati OH. March 2009.

List of Subjects in 40 CFR Part 141

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

    Dated: June 2, 2010.
Cynthia C. Dougherty,
Director, Officer of Ground Water and Drinking Water.

0
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, 300j-4, and 300j-9.

0
2. Appendix A to subpart C of part 141 is amended as follows:
0
a. By adding the entry for ``Dalapon'' after the entry for 
``Carbofuran'' in the table entitled ``Alternative testing methods for 
contaminants listed at 40 CFR 141.24 (e)(1).''
0
b. By revising the entries for ``Radium 226,'' ``Uranium,'' 
``Radioactive Cesium,'' ``Radioactive Iodine,'' ``Tritium,'' and 
``Gamma Emitters'' in the table entitled ``Alternative testing methods 
for contaminants listed at 40 CFR 141.25(a).''
0
c. By revising all entries in the table entitled ``Alternative Testing 
Methods for Disinfectant Residuals Listed at 40 CFR 141.74(a)(2).''
0
d. By revising all entries in the table entitled ``Alternative Testing 
Methods for Contaminants Listed at 40 CFR 141.131(b)(1).''
0
e. By revising all entries in the table entitled ``Alternative Testing 
Methods for Disinfectant Residuals Listed at 40 CFR 141.131(c)(1).''
0
f. By revising all entries in the table entitled ``Alternative Testing 
Methods for Contaminants Listed at 40 CFR 141.402(c)(2)'' and,
0
g. By adding footnotes 20 and 21 to the table.

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 141.24(e)(1)
----------------------------------------------------------------------------------------------------------------
                                                                                SM 21st edition
            Contaminant                    Methodology            EPA method          \1\         SM online \3\
----------------------------------------------------------------------------------------------------------------

                                                  * * * * * * *
Dalapon...........................  Ion Chromatography               \14\ 557           6640 B       6640 B-01.
                                     Electrospray Ionization
                                     Tandem Mass Spectrometry
                                     (IC-ESI-MS/MS).

                                                  * * * * * * *
----------------------------------------------------------------------------------------------------------------


                     Alternative Testing Methods for Contaminants Listed at 40 CFR 141.25(a)
----------------------------------------------------------------------------------------------------------------
            Contaminant                  Methodology         SM 21st edition \ 1\              ASTM \ 4\
----------------------------------------------------------------------------------------------------------------
Naturally Occurring:

                                                  * * * * * * *
    Radium 226....................  Radon emanation.....  7500-Ra C.................  D3454-05.
                                    Radiochemical.......  7500-Ra B.................  D2460-07.

                                                  * * * * * * *
    Uranium.......................  Radiochemical.......  7500-U B..................  ..........................
                                    ICP-MS..............  ..........................  D5673-05.
                                    Alpha spectrometry..  7500-U C..................  ..........................
                                    Laser Phosphorimetry  ..........................  D5174-07.
Man-Made:

[[Page 32300]]


    Radioactive Cesium............  Radiochemical.......  7500-Cs B.................  ..........................
                                    Gamma Ray             7120......................  D3649-06.
                                     Spectrometry.
    Radioactive Iodine............  Radiochemical.......  7500-I B..................  D3649-06.
                                    ....................  7500-I C..................
                                    ....................  7500-I D..................
                                    Gamma Ray             7120......................  D4785-08.
                                     Spectrometry.

                                                  * * * * * * *
    Tritium.......................  Liquid Scintillation  7500-3H B.................  D4107-08.
    Gamma Emitters................  Gamma Ray             7120......................  D3649-06.
                                     Spectrometry.
                                                          7500-Cs B.................  D4785-08.
                                                          7500-I B..................
----------------------------------------------------------------------------------------------------------------

* * * * * * *

              Alternative Testing Methods for Disinfectant Residuals Listed at 40 CFR 141.74(a)(2)
----------------------------------------------------------------------------------------------------------------
                                                   SM 21st Edition
          Residual                Methodology            \1\               ASTM \4\                Other
----------------------------------------------------------------------------------------------------------------
Free Chlorine..............  Amperometric          4500-Cl D......  D 1253-08............
                              Titration.
                             DPD Ferrous           4500-Cl F......
                              Titrimetric.
                             DPD Colorimetric....  4500-Cl G......
                             Syringaldazine        4500-Cl H......
                              (FACTS).
                             On-line Chlorine      ...............  .....................  EPA 334.0.\16\
                              Analyzer.
                             Amperometric Sensor.  ...............  .....................  ChloroSense.\17\
Total Chlorine.............  Amperometric          4500-Cl D......  D 1253-08............
                              Titration.
                             Amperometric          4500-Cl E......
                              Titration (Low
                              level measurement).
                             DPD Ferrous           4500-Cl F......
                              Titrimetric.
                             DPD Colorimetric....  4500-Cl G......
                             Iodometric Electrode  4500-Cl I......
                             On-line Chlorine      ...............  .....................  EPA 334.0.\16\
                              Analyzer.
                             Amperometric Sensor.  ...............  .....................  ChloroSense.\17\
Chlorine Dioxide...........  Amperometric          4500-ClO2 C....
                              Titration.
                             Amperometric          4500-ClO2 E....
                              Titration.
Ozone......................  Indigo Method.......  4500-O3 B......
----------------------------------------------------------------------------------------------------------------



                   Alternative Testing Methods for Contaminants Listed at 40 CFR 141.131(b)(1)
----------------------------------------------------------------------------------------------------------------
         Contaminant               Methodology        EPA Method           ASTM \4\         SM 21st Edition \1\
----------------------------------------------------------------------------------------------------------------
TTHM........................  P&T/GC/MS...........       \9\ 524.3
HAA5........................  LLE (diazomethane)/   ..............  .....................  6251 B.
                               GC/ECD.
                              Ion Chromatography          \14\ 557
                               Electrospray
                               Ionization Tandem
                               Mass Spectrometry
                               (IC-ESI-MS/MS).
Bromate.....................  Two-Dimensional Ion       \18\ 302.0
                               Chromatography (IC).
                              Ion Chromatography          \14\ 557
                               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    Amperometric          ..............  .....................  4500-ClO2 E.
 as prescribed in 40 CFR       Titration.
 141.132(b)(2)(i)(A)..
----------------------------------------------------------------------------------------------------------------



              Alternative Testing Methods for Disinfectant Residuals Listed at 40 CFR 141.131(c)(1)
----------------------------------------------------------------------------------------------------------------
                                                   SM 21st Edition
          Residual                Methodology            \1\               ASTM \4\                Other
----------------------------------------------------------------------------------------------------------------
Free Chlorine..............  Amperometric          4500-Cl D......  D 1253-08              .....................
                              Titration.
                             DPD Ferrous           4500-Cl F......
                              Titrimetric.

[[Page 32301]]


                             DPD Colorimetric....  4500-Cl G......
                             Syringaldazine        4500-Cl H......
                              (FACTS).
                             Amperometric Sensor.  ...............  .....................  ChloroSense.\17\
                             On-line Chlorine      ...............  .....................  EPA 334.0.\16\
                              Analyzer.
Combined Chlorine..........  Amperometric          4500-Cl D......  D 1253-08............
                              Titration.
                             DPD Ferrous           4500-Cl F......
                              Titrimetric.
                             DPD Colorimetric....  4500-Cl G......
Total Chlorine.............  Amperometric          4500-Cl D......  D 1253-08............
                              Titration.
                             Low level             4500-Cl E......
                              Amperometric
                              Titration.
                             DPD Ferrous           4500-Cl F......
                              Titrimetric.
                             DPD Colorimetric....  4500-Cl G......
                             Iodometric Electrode  4500-Cl I......
                             Amperometric Sensor.  ...............  .....................  ChloroSense.\17\
                             On-line Chlorine      ...............  .....................  EPA 334.0.\16\
                              Analyzer.
Chlorine Dioxide...........  Amperometric Method   4500-ClO2 E.
                              II.
----------------------------------------------------------------------------------------------------------------

* * * * *

                                       Alternative Testing Methods for Contaminants Listed at 40 CFR 141.402(c)(2)
--------------------------------------------------------------------------------------------------------------------------------------------------------
              Organism                     Methodology         SM 20th edition \6\    SM 21st edition \1\       SM online \3\              Other
--------------------------------------------------------------------------------------------------------------------------------------------------------
E. coli............................  Colilert..............  ......................  9223 B...............  9223 B-97............
                                     Colisure..............  ......................  9223 B...............  9223 B-97............
                                     Colilert-18...........  9223 B................  9223 B...............  9223 B-97............
                                     Readycult[supreg].....  ......................  .....................  .....................  Readycult[supreg].\20
                                                                                                                                    \
                                     Colitag...............  ......................  .....................  .....................  Modified
                                                                                                                                    ColitagTM.\13\
                                     Chromocult[supreg]....  ......................  .....................  .....................  Chromocult[supreg].\2
                                                                                                                                    1\
Enterococci........................  Multiple-Tube           ......................  .....................  9230 B-04............
                                      Technique.
--------------------------------------------------------------------------------------------------------------------------------------------------------
* * * * *
\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.
* * * * *
\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.
* * * * *
\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://epa.gov/safewater/methods/analyticalmethods_ogwdw.html.
* * * * *
\13\ Modified Colitag\TM\; 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 http://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://epa.gov/safewater/methods/analyticalmethods_ogwdw.html.
* * * * *
\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://epa.gov/safewater/methods/analyticalmethods_ogwdw.html.
\17\ ChloroSense. ``Measurement of Free and Total Chlorine in Drinking Water by Palintest ChloroSense,'' August 2009. Available at http://www.nemi.gov
  or from Palintest Ltd, 21 Kenton Lands Road, PO Box 18395, 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://epa.gov/safewater/methods/analyticalmethods_ogwdw.html.
* * * * *
\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 Chemicals (affiliate of Merck KGaA, Darmstadt, Germany), 480 S.
  Democrat Road, Gibbstown, NJ 08027-1297.
\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 Chemicals (affiliate of Merck KGaA, Darmstadt, Germany),
  480 S. Democrat Road, Gibbstown, NJ 08027-1297.


[[Page 32302]]

[FR Doc. 2010-13685 Filed 6-7-10; 8:45 am]
BILLING CODE 6560-50-P

