Analytical Methods Approved for Drinking Water Compliance
                          Monitoring of Organic Contaminants
         ,v^^>^ ,  tu      Analysis for the following contaminants shall be conducted in accordance with the methods in the following table, or their equivalent as determined by EPA.
     Q  \r\|/jX  *T      The methods and monitoring requirements for these contaminants are specified in 40 CFR 141.24. Additional methods are listed in Appendix A to Subpart C
                   &•       of Part 141.
                          The CFR is the legal reference for approved methods and takes precedent over this table. The table should accurately reflect the analytical methods
                          information published in 40 CFR 141. If you find discrepancies, please notify The Safe Drinking Water Hotline (800-426-4791) so that EPA can correct the
                          table.
Contaminant ..,.__.
Method
Organization Number

l,l?l-Trichloroethane
EPA 502. 2 Rev 2.1
EPA 524. 2 Rev 4.1
EPA 551.1 Rev 1.0

l,l?2-Trichloroethane
EPA 502.2 Rev 2.1
EPA 524. 2 Rev 4.1
EPA 551.1 Rev 1.0

1,1-Dichloroethylene
EPA 502. 2 Rev 2.1
EPA
Publication
Reference Title Date Number


In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III


In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III


In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III
Publication
Order
Number
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
Source of Method
http://www.nemi.gov
http://www.nemi.gov
http://www.nemi.gov
http://www.nemi.gov
http://www.nemi.gov

http://www.nemi.gov
http://www.nemi.gov

Revised June 2008                          Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations                   Page 1 of 21

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Contaminant
Method
Organization Number

1,1-Dichloroethylene
EPA 524. 2 Rev 4.1

1,2 Dichlorobenzene
EPA 502.2 Rev 2.1
EPA 524. 2 Rev 4.1

1,2,4-Trichlorobenzene
EPA 502. 2 Rev 2.1
EPA 524. 2 Rev 4.1

1,2-Dichloroethane
EPA 502. 2 Rev 2.1
EPA 524. 2 Rev 4.1

1,2-Dichloropropane
EPA 502.2 Rev 2.1
EPA 524. 2 Rev 4.1
Reference Title Date


In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III


In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III


In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III


In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III


In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
EPA
Publication
Number
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
Publication
Order
Number
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
Source of Method
http://www.nemi
http://www.nemi
http : //www. nemi

http : //www. nemi

http : //www. nemi
http : //www. nemi
http : //www. nemi
http://www.nemi
http://www.nemi
gov
gov
gov

gov

gov
gov
gov
gov
gov
Revised June 2008
Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations
Page 2 of 21

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Contaminant
                   Method
    Organization Number       Reference Title
                                                                                  EPA              Publication
                                                                                  Publication      Order
                                                                     Date         Number          Number        Source of Method
1,4-Dichlorobenzene
    EPA           502.2Rev2.1     In Methods for the Determination of   August 1995  EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                   Organic Compounds in Drinking Water-
                                   Supplement III

    EPA           524.2Rev4.1     In Methods for the Determination of   August 1995  EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                   Organic Compounds in Drinking Water-
                                   Supplement III
2,3,7,8-TCDD (dioxin)
    EPA           1613            Tetra-through Octa-Chlorinated       October 1994 EPA/821-B-94-005   PB95-104774     National Technical Information Service (NTIS)
                                   Dioxins and Furans by Isotope-Dilution
                                   HRGC/HRMS

                                       Accurate determination of the chlorinated esters requires hydrolysis of the sample as described in EPA Methods 515.1, 515.2, 515.3, 515.4, and 555
                                       and ASTM Methods D5317-93 and D5317-98 (Reapproved 2003).
2,4,5-TP (Silvex)
    ASTM         D5317-93        Annual Book of ASTM Standards, Vol.
    International                     11.02
                                                                                                                    ASTM International (ASTM)
    ASTM         D5317-98       Annual Book of ASTM Standards, Vol.
    International     (Reapproved      11.02
                   2003)
                                                                                                                    http://www.astm.org
    EPA           515.1 Rev 4.0     In Methods for the Determination of    December    EPA/600/4-88-039   PB91-231480     National Technical Information Service (NTIS)
                                   Organic Compounds in Drinking Water  1988,
                                                                     Revised July
                                                                     1991

    EPA           515.2 Rev 1.1     In Methods for the Determination of    August 1995  EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                   Organic Compounds in Drinking Water-
                                   Supplement III

    EPA           515.3 Rev 1.0     In Methods for the Determination of    August2000  EPA 815-R-00-014   PB2000-106981   http://www.epa.gov/safewater/methods/sourcalt.html
                                   Organic and Inorganic Compounds in
                                   Drinking Water, Volume 1
    EPA
                   515.4 Rev 1.0     Determination of Chlorinated Acids in  April 2000    EPA/815/B-00/001
                                   Drinking Water by Liquid-Liquid
                                   Microextraction, Derivatization, and
                                   Fast Gas Chromatography with Electron
                                   Capture Detection
http://www.epa.gov/safewater/methods/sourcalt.html
Revised June 2008
                                               Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations
                                 Page 3 of 21

-------
Contaminant
                   Method
    Organization Number
                Reference Title
                                  Date
EPA
Publication
Number
Publication
Order
Number
Source of Method
2,4,5-TP (Silvex)
                    Accurate determination of the chlorinated esters requires hydrolysis of the sample as described in EPA Methods 515.1, 515.2, 515.3, 515.4, and 555
                    and ASTM Methods D5317-93 and D5317-98 (Reapproved 2003).
    EPA           555 Rev 1.0      In Methods for the Determination of    August 1992   EPA/600/R-92/129  PB92-207703     http://www.nemi.gov
                                   Organic Compounds in Drinking Water
                                   Supplement II

                                        Accurate determination of the chlorinated esters requires hydrolysis of the sample as described in EPA Methods 515.1, 515.2, 515.3, 515.4, and 555
2,4-D (as acid, salts and esters)
                                        and ASTM Methods D5317-93 and D5317-98 (Reapproved 2003).
    ASTM         D5317-93        Annual Book of ASTM Standards, Vol.
    International                     11.02
                                                                                                  ASTM International (ASTM)
    ASTM
    International
D5317-98
(Reapproved
2003)
Annual Book of ASTM Standards, Vol.
11.02
                                   http://www.astm.org
    EPA
    EPA
515.1 Rev 4.0     In Methods for the Determination of    December
                Organic Compounds in Drinking Water  1988,
                                                  Revised July
                                                  1991
                                               EPA/600/4-88-039   PB91-231480     National Technical Information Service (NTIS)
    EPA           515.2 Rev 1.1     In Methods for the Determination of    August 1995   EPA/600/R-95-131  PB95-261616     http://www.nemi.gov
                                   Organic Compounds in Drinking Water-
                                   Supplement III

    EPA           515.3 Rev 1.0     In Methods for the Determination of    August2000   EPA 815-R-00-014  PB2000-106981   http://www.epa.gov/safewater/methods/sourcalt.html
                                   Organic and Inorganic Compounds in
                                   Drinking Water, Volume 1
515.4 Rev 1.0     Determination of Chlorinated Acids in  April 2000    EPA/815/B-00/001
                Drinking Water by Liquid-Liquid
                Microextraction, Derivatization, and
                Fast Gas Chromatography with Electron
                Capture Detection
                                                                                  http://www.epa.gov/safewater/methods/sourcalt.html
    EPA
555 Rev 1.0      In Methods for the Determination of    August 1992   EPA/600/R-92/129  PB92-207703
                Organic Compounds in Drinking Water
                Supplement II
                                                                                  http://www.nemi.gov
Revised June 2008
                             Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations
                                                                                                                    Page 4 of 21

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Contaminant
Method
Organization Number Reference Title

Alachlor
EPA
Publication
Date Number

Publication
Order
Number

Source of Method

    EPA            505 Rev 2.1      In Methods for the Determination of    August 1995   EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                     Organic Compounds in Drinking Water-
                                     Supplement III
                                          Substitution of the detector specified in Method 505, 507, or 508.1 for the purpose of achieving lower detection limits is allowed as follows. Either
                                          an electron capture or nitrogen phosphorous detector may be used provided all regulatory requirements and quality control criteria are met.

    EPA            507 Rev 2.1      In Methods for the Determination of    August 1995   EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                     Organic Compounds in Drinking Water-
                                     Supplement III
                                          Substitution of the detector specified in Method 505, 507, or 508.1 for the purpose of achieving lower detection limits is allowed as follows. Either
                                          an electron capture or nitrogen phosphorous detector may be used provided all regulatory requirements and quality control criteria are met.

    EPA            508.1 Rev 2.0    In Methods for the Determination of    August 1995   EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                     Organic Compounds in Drinking Water-
                                     Supplement III
                                          Substitution of the detector specified in Method 505, 507, or 508.1 for the purpose of achieving lower detection limits is allowed as follows. Either
                                          an electron capture or nitrogen phosphorous detector may be used provided all regulatory requirements and quality control criteria are met.
    EPA
525.2 Rev 2.0     In Methods for the Determination of    August 1995   EPA/600/R-95-131   PB95-261616
                 Organic Compounds in Drinking Water-
                 Supplement III
http://www.nemi.gov
    EPA
551.1 Rev 1.0     In Methods for the Determination of    August 1995   EPA/600/R-95-131   PB95-261616
                 Organic Compounds in Drinking Water-
                 Supplement III
http://www.nemi.gov
Atrazine
    EPA            505 Rev 2.1      In Methods for the Determination of    August 1995   EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                     Organic Compounds in Drinking Water-
                                     Supplement III
                                          Substitution of the detector specified in Method 505, 507, or 508.1 for the purpose of achieving lower detection limits is allowed as follows. Either
                                          an electron capture or nitrogen phosphorous detector may be used provided all regulatory requirements and quality control criteria are met.

    EPA            507 Rev 2.1      In Methods for the Determination of    August 1995   EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                     Organic Compounds in Drinking Water-
                                     Supplement III
                                          Substitution of the detector specified in Method 505, 507, or 508.1 for the purpose of achieving lower detection limits is allowed as follows. Either
                                          an electron capture or nitrogen phosphorous detector may be used provided all regulatory requirements and quality control criteria are met.
 Revised June 2008
                              Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations
                                    Page 5 of 21

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Contaminant
Method
Organization Number

Atrazine
EPA 508.1 Rev 2.0
EPA 525.2 Rev 2.0
EPA 551.1 Rev 1.0
Syngenta Syngenta AG-
Crop 625
Protection,
Inc.

Benzene
EPA 502. 2 Rev 2.1
EPA 524. 2 Rev 4.1

Benzo(a)pyrene
Reference Title Date


EPA Publication
Publication Order
Number Number
Source of Method

In Methods for the Determination of August 1995 EPA/600/R-95-131 PB95-261616 http://www.nemi.gov
Organic Compounds in Drinking Water-
Supplement III
Substitution of the detector specified in Method 505, 507, or 508.1 for the purpose of achieving lower detection limits is allowed as follows. Either
an electron capture or nitrogen phosphorous detector may be used provided all regulatory requirements and quality control criteria are met.
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
EPA/600/R-95-131 PB95-261616
EPA/600/R-95-131 PB95-261616
http://www.nemi.gov
http://www.nemi.gov
Atrazine in Drinking Water by February Syngenta Crop Protection, Inc.
Immunoassay 2001
This method may not be used for the analysis of atrazine in any system where chlorine dioxide is used for drinking water treatment. In samples
from all other systems, any result for atrazine generated by Method AG-625 that is greater than one-half the maximum contaminant level (MCL)
(in other words, greater than 0. 001 5mg/L or 1.5 ug/L)mustbe confirmed using another approved method for this contaminant and should
use additional volume of the original sample collected for compliance monitoring. In instances where a result from Method AG-625 triggers such
confirmatory testing, the confirmatory result is to be used to determine compliance.


In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III


EPA/600/R-95-131 PB95-261616
EPA/600/R-95-131 PB95-261616

http://www.nemi.gov

http://www.nemi.gov


    EPA
525.2 Rev 2.0    In Methods for the Determination of    August 1995   EPA/600/R-95-131   PB95-261616
                Organic Compounds in Drinking Water-
                Supplement III
                                                                                    http://www.nemi.gov
    EPA
550
In Methods for the Determination of    July 1990     EPA/600/4-90/020   PB91-146027
Organic Compounds in Drinking Water
Supplement I
http://www.nemi.gov
Revised June 2008
                             Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations
                                                                                                                      Page 6 of 21

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Contaminant
                   Method
    Organization Number
               Reference Title
                                  Date
EPA
Publication
Number
Publication
Order
Number
Source of Method
Benzo(a)pyrene
    EPA
550.1
In Methods for the Determination of    July 1990     EPA/600/4-90/020    PB91-146027     http://www.nemi.gov
Organic Compounds in Drinking Water
Supplement I
Carbofuran
    EPA
531.1 Rev 3.1    In Methods for the Determination of    Augustl995   EPA/600/R-95-131   PB95-261616
               Organic Compounds in Drinking Water-
               Supplement III
                                                                                 http://www.nemi.gov
    EPA
531.2 Rev 1.0    Measurement of N-Methyl-           September
               carbamoyloximes and N-Methyl-       2001
               carbamates in Water by Direct Aqueous
               Injection HPLC with Post Column
               Derivatization
                                              EPA 815/B/01/002
                                  http://www.epa.gov/safewater/methods/sourcalt.html
    Standard        6610 B         Standard Methods for the Examination  2005
    Methods                       of Water and Wastewater, 21 st Edition
                                                                                                Standard Methods
    Standard        6610 B-04       Online version of Standard Methods for
    Methods                       the Examination of Water and
    Online                         Wastewater. Approval year by Standard
                                  Methods Committee is designated by
                                  last 2 digits. This is the only online
                                  version that is approved.
                                                                                                http: //www. standardmethods. org/
Carbon Tetrachloride
    EPA
502.2Rev2.1    In Methods for the Determination of    August 1995   EPA/600/R-95-131   PB95-261616
               Organic Compounds in Drinking Water-
               Supplement III
                                                                                 http://www.nemi.gov
    EPA
524.2Rev4.1    In Methods for the Determination of    August 1995   EPA/600/R-95-131   PB95-261616
               Organic Compounds in Drinking Water-
               Supplement III
                                                                                 http://www.nemi.gov
    EPA
551.1 Rev 1.0    In Methods for the Determination of    August 1995   EPA/600/R-95-131   PB95-261616
               Organic Compounds in Drinking Water-
               Supplement III
                                                                                 http://www.nemi.gov
Revised June 2008
                            Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations
                                                                                                                  Page 7 of 21

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Contaminant
Method
Organization Number

Chlordane
EPA 505 Rev 2.1
EPA 508 Rev 3.1
EPA 508.1 Rev 2.0
EPA 525.2 Rev 2.0

Chlorobenzene
EPA 502.2 Rev 2.1
EPA 524. 2 Rev 4.1

cis-Dichloroethylene
EPA 502.2 Rev 2.1
EPA 524. 2 Rev 4.1

Dalapon
EPA
Publication
Reference Title Date Number


In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III


In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III


In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III


Publication
Order
Number
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616

Source of Method
http://www.nemi.gov
http://www.nemi.gov

http://www.nemi.gov
http://www.nemi.gov
http://www.nemi.gov
http://www.nemi.gov
http://www.nemi.gov
http://www.nemi.gov


    EPA           515.1 Rev 4.0    In Methods for the Determination of    December    EPA/600/4-88-039   PB91-231480     National Technical Information Service (NTIS)
                                   Organic Compounds in Drinking Water  1988,
                                                                      Revised July
                                                                      1991
Revised June 2008
Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations
Page 8 of 21

-------
Contaminant
                   Method
    Organization Number
                Reference Title
Date
EPA              Publication
Publication      Order
Number          Number        Source of Method
Dalapon
    EPA           515.3 Rev 1.0     In Methods for the Determination of    August2000   EPA 815-R-00-014  PB2000-106981   http://www.epa.gov/safewater/methods/sourcalt.html
                                   Organic and Inorganic Compounds in
                                   Drinking Water, Volume 1
    EPA
515.4 Rev 1.0    Determination of Chlorinated Acids in   April 2000     EPA/815/B-00/001
               Drinking Water by Liquid-Liquid
               Microextraction, Derivatization, and
               Fast Gas Chromatography with Electron
               Capture Detection
                                                http://www.epa.gov/safewater/methods/sourcalt.html
    EPA           552.1 Rev 1.0     In Methods for the Determination of    August 1992   EPA/600/R-92/129   PB92-207703     http://www.nemi.gov
                                   Organic Compounds in Drinking Water
                                   Supplement II

    EPA           552.2 Rev 1.0     In Methods for the Determination of    August 1995   EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                   Organic Compounds in Drinking Water-
                                   Supplement III
    EPA
552.3 Rev 1.0    Determination of Haloacetic Acids and  July 2003      EPA-815-B-03-002
               Dalapon in Drinking Water by Liquid-
               Liquid Microextraction, Derivatization,
               and Gas Chromatography with Electron
               Capture Detection
                                                http://www.epa.gov/safewater/methods/sourcalt.html

Di(2-ethylhexyl)adipate
EPA 506 Rev 1.1
EPA 525.2 Rev 2.0

Di(2-ethylhexyl)phthalate
EPA 506 Rev 1.1
EPA 525.2 Rev 2.0


In Methods for the Determination of August 1995 EPA/600/R-95-131 PB95-261616
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1995 EPA/600/R-95-131 PB95-261616
Organic Compounds in Drinking Water-
Supplement III


In Methods for the Determination of August 1995 EPA/600/R-95-131 PB95-261616
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1995 EPA/600/R-95-131 PB95-261616
Organic Compounds in Drinking Water-
Supplement III
http://www.nemi.gov
http://www.nemi.gov
http://www.nemi.gov
http://www.nemi.gov
Revised June 2008
                            Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations
                                                                                 Page 9 of 21

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Contaminant
                   Method
    Organization Number        Reference Title
                                                              EPA             Publication
                                                              Publication      Order
                                                 Date        Number         Number       Source of Method
Dibromochloropropane (DBCP)
    EPA           504.1 Rev 1.1    In Methods for the Determination of    August 1995   EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                  Organic Compounds in Drinking Water-
                                  Supplement III

    EPA           551.1 Rev 1.0    In Methods for the Determination of    August 1995   EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                  Organic Compounds in Drinking Water-
                                  Supplement III
Dichloromethane
    EPA           502.2Rev2.1    In Methods for the Determination of    August 1995   EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                  Organic Compounds in Drinking Water-
                                  Supplement III

    EPA           524.2Rev4.1    In Methods for the Determination of    August 1995   EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                  Organic Compounds in Drinking Water-
                                  Supplement III

                                       Accurate determination of the chlorinated esters requires hydrolysis of the sample as described in EPA Methods 515.1, 515.2, 515.3, 515.4, and 555.
Dinoseb
    EPA           515.1 Rev 4.0    In Methods for the Determination of    December    EPA/600/4-88-039   PB91-231480     National Technical Information Service (NTIS)
                                  Organic Compounds in Drinking Water 1988,
                                                                    Revised July
                                                                    1991

    EPA           515.2 Rev 1.1    In Methods for the Determination of    August 1995   EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                  Organic Compounds in Drinking Water-
                                  Supplement III

    EPA           515.3 Rev 1.0    In Methods for the Determination of    August2000   EPA 815-R-00-014   PB2000-106981   http://www.epa.gov/safewater/methods/sourcalt.html
                                  Organic and Inorganic Compounds in
                                  Drinking Water, Volume 1
    EPA
515.4 Rev 1.0    Determination of Chlorinated Acids in  April 2000    EPA/815/B-00/001
               Drinking Water by Liquid-Liquid
               Microextraction, Derivatization, and
               Fast Gas Chromatography with Electron
               Capture Detection
http://www.epa.gov/safewater/methods/sourcalt.html
    EPA           555 Rev 1.0     In Methods for the Determination of    August 1992   EPA/600/R-92/129  PB92-207703     http://www.nemi.gov
                                  Organic Compounds in Drinking Water
                                  Supplement II
Revised June 2008
                            Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations
                                Page 10 of 21

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Contaminant
Method
Organization Number

Diquat
EPA 549.2 Rev 1.0

Endothall
EPA 548.1 Rev 1.0

Endrin
EPA 505 Rev 2.1
EPA 508 Rev 3.1
EPA 508.1 Rev 2.0
EPA 525.2 Rev 2.0
EPA 551.1 Rev 1.0

Ethylbenzene
EPA 502.2 Rev 2.1
EPA 524. 2 Rev 4.1
Reference Title Date


In Methods for the Determination of August 2000
Organic and Inorganic Compounds in
Drinking Water, Volume 1


In Methods for the Determination of August 1 992
Organic Compounds in Drinking Water
Supplement II


In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III


In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
EPA
Publication
Number
EPA 815-R-00-014
EPA/600/R-92/129
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
Publication
Order
Number Source of Method
PB2000- 106981 http://www.epa.gov/nerlcwww/ordmeth.htm
PB92-207703 http://www.nemi.gov
PB95-261616 http://www.nemi.gov
PB95-261616 http://www.nemi.gov
PB95-261616 http://www.nemi.gov
PB95-261616 http://www.nemi.gov
PB95-261616 http://www.nemi.gov
PB95-261616 http://www.nemi.gov
PB95-261616 http://www.nemi.gov

Revised June 2008
Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations
Page 11 of 21

-------
Contaminant
Method
Organization Number

Ethylene dibromide (EDB)
EPA 504.1 Rev 1.1
EPA 551.1 Rev 1.0

Glyphosate
EPA 547
Standard 6651
Methods
Standard 6651
Methods
Standard 6651
Methods

Heptachlor
EPA 505 Rev 2.1
EPA 508 Rev 3.1
EPA 508.1 Rev 2.0
EPA 525.2 Rev 2.0
EPA 551.1 Rev 1.0
EPA
Publication
Reference Title Date Number


In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III


In Methods for the Determination of July 1 990 EPA/600/4-90/020
Organic Compounds in Drinking Water
Supplement I
Standard Methods for the Examination 1 992
of Water and Wastewater, 1 8th Edition
Standard Methods for the Examination 1995
of Water and Wastewater, 1 9th Edition
Standard Methods for the Examination 1998
of Water and Wastewater, 20th Edition


In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1995 EPA/600/R-95-131
Organic Compounds in Drinking Water-
Supplement III
Publication
Order
Number
PB95-261616
PB95-261616
PB9 1-146027



PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
Source of Method
http://www.nemi.gov
http://www.nemi.gov

http://www.nemi.gov

Standard Methods
Standard Methods
Standard Methods
http://www.nemi.gov

http://www.nemi.gov
http://www.nemi.gov
http://www.nemi.gov
http://www.nemi.gov
Revised June 2008
Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations
Page 12 of 21

-------
Contaminant
Organization

Method
Number

Reference Title

Heptachlor Epoxide
EPA
EPA
EPA
EPA
EPA

505 Rev 2.1
508 Rev 3.1
508.1 Rev 2.0
525.2 Rev 2.0
551.1 Rev 1.0

In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III

Hexachlorobenzene
EPA
EPA
EPA
EPA
EPA
505 Rev 2.1
508 Rev 3.1
508.1 Rev 2.0
525.2 Rev 2.0
551.1 Rev 1.0
In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III
Date
August
August
August
August
August
August
August
August
August
August

1995
1995
1995
1995
1995
1995
1995
1995
1995
1995
EPA
Publication
Number
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
Publication
Order
Number
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
Source of Method
http://www.nemi
http : //www. nemi

http : //www. nemi
http://www.nemi
http://www.nemi
http://www.nemi
http : //www. nemi

http : //www. nemi
http://www.nemi
http://www.nemi
gov
gov

gov
gov
gov
gov
gov

gov
gov
gov
Revised June 2008
Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations
Page 13 of 21

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Contaminant
Organization

Method
Number

Reference Title

Hexachlorocyclopentadiene
EPA
EPA
EPA
EPA
EPA

Lindane
EPA
EPA
EPA
EPA
EPA
505 Rev 2.1
508 Rev 3.1
508.1 Rev 2.0
525.2 Rev 2.0
551.1 Rev 1.0


505 Rev 2.1
508 Rev 3.1
508.1 Rev 2.0
525.2 Rev 2.0
551.1 Rev 1.0
In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III


In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of
Organic Compounds in Drinking Water-
Supplement III
Date
August
August
August
August
August
August
August
August
August
August

1995
1995
1995
1995
1995
1995
1995
1995
1995
1995
EPA
Publication
Number
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
Publication
Order
Number
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
Source of Method
http://www.nemi
http : //www. nemi

http : //www. nemi
http://www.nemi
http://www.nemi
http://www.nemi
http : //www. nemi

http : //www. nemi
http://www.nemi
http://www.nemi
gov
gov

gov
gov
gov
gov
gov

gov
gov
gov
Revised June 2008                                Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations                       Page 14 of 21

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Contaminant
                   Method
    Organization Number
                Reference Title
                                  Date
EPA
Publication
Number
Publication
Order
Number
Source of Method
Methoxychlor
    EPA
505 Rev 2.1      In Methods for the Determination of    August 1995  EPA/600/R-95-131   PB95-261616
                Organic Compounds in Drinking Water-
                Supplement III
                                                                                 http://www.nemi.gov
    EPA
508 Rev 3.1      In Methods for the Determination of    August 1995  EPA/600/R-95-131   PB95-261616
                Organic Compounds in Drinking Water-
                Supplement III
                                                                                 http://www.nemi.gov
    EPA
508.1 Rev 2.0     In Methods for the Determination of    August 1995  EPA/600/R-95-131   PB95-261616
                Organic Compounds in Drinking Water-
                Supplement III
                                                                                 http://www.nemi.gov
    EPA
525.2 Rev 2.0     In Methods for the Determination of    August 1995  EPA/600/R-95-131   PB95-261616
                Organic Compounds in Drinking Water-
                Supplement III
                                                                                 http://www.nemi.gov
    EPA
551.1 Rev 1.0     In Methods for the Determination of    August 1995  EPA/600/R-95-131   PB95-261616
                Organic Compounds in Drinking Water-
                Supplement III
                                                                                 http://www.nemi.gov
Oxamyl
    EPA
531.1 Rev 3.1     In Methods for the Determination of    Augustl995  EPA/600/R-95-131   PB95-261616
                Organic Compounds in Drinking Water-
                Supplement III
                                                                                 http://www.nemi.gov
    EPA
531.2 Rev 1.0    Measurement of N-Methyl-           September
               carbamoyloximes and N-Methyl-      2001
               carbamates in Water by Direct Aqueous
               Injection HPLC with Post Column
               Derivatization
                                               EPA 815/B/01/002
                                  http://www.epa.gov/safewater/methods/sourcalt.html
    Standard
    Methods
6610 B
Standard Methods for the Examination  2005
of Water and Wastewater, 21 st Edition
                                   Standard Methods
    Standard        6610 B-04        Online version of Standard Methods for
    Methods                        the Examination of Water and
    Online                          Wastewater. Approval year by Standard
                                   Methods Committee is designated by
                                   last 2 digits. This is the only online
                                   version that is approved.
                                                                                                 http: //www. standardmethods. org/
Revised June 2008
                            Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations
                                                                                                                 Page 15 of 21

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Contaminant                                                                 EPA              Publication
                   Method                                                      Publication       Order
    Organization Number       Reference Title                  Date        Number          Number        Source of Method
       i    »     I    \                 PCBs are qualitatively identified as Aroclors and measured for compliance purposes as decachlorobiphenyl. Users of Method 505 may have more
       (as Aroclors;	1 difficulty ^ achieving the required detection limits than users of Methods 508.1, 525.2 or 508.
    EPA           505 Rev 2.1      In Methods for the Determination of    August 1995  EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                   Organic Compounds in Drinking Water-
                                   Supplement III

    EPA           508 Rev 3.1      In Methods for the Determination of    August 1995  EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                   Organic Compounds in Drinking Water-
                                   Supplement III

    EPA           508.1 Rev 2.0     In Methods for the Determination of    August 1995  EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                   Organic Compounds in Drinking Water-
                                   Supplement III

    EPA           525.2 Rev 2.0     In Methods for the Determination of    August 1995  EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                   Organic Compounds in Drinking Water-
                                   Supplement III
       i   A      ui    H°  h    n    PCBs are qualitatively identified as Aroclors and measured for compliance purposes as decachlorobiphenyl. Users of Method 505 may have more
       (as aecacniorODlpnenylJ	1 difficulty ^ achieving the required detection limits than users of Methods 508.1, 525.2 or 508.
    EPA           SOSARevl.O     In Methods for the Determination of    December    EPA/600/4-88-039   PB91-231480     http://www.nemi.gov
                                   Organic Compounds in Drinking Water 1988,
                                                                    Revised July
                                                                    1991
Pentachlorophenol
    ASTM         D5317-93       Annual Book of ASTM Standards, Vol.                                                 ASTM International (ASTM)
    International                    11.02

    ASTM         D5317-98       Annual Book of ASTM Standards, Vol.                                                 http://www.astm.org
    International     (Reapproved     11.02
                   2003)

    EPA           515.1 Rev 4.0    In Methods for the Determination of    December    EPA/600/4-88-039   PB91-231480     National Technical Information Service (NTIS)
                                  Organic Compounds in Drinking Water 1988,
                                                                    Revised July
                                                                    1991

    EPA           515.2Revl.l    In Methods for the Determination of    August 1995  EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                  Organic Compounds in Drinking Water-
                                  Supplement III



Revised June 2008                               Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations                      Page 16 of 21

-------
Contaminant
                   Method
    Organization Number       Reference Title
                                                                              EPA              Publication
                                                                              Publication      Order
                                                                 Date        Number          Number       Source of Method
Pentachlorophenol
    EPA           515.3 Rev 1.0     In Methods for the Determination of    August2000   EPA 815-R-00-014  PB2000-106981    http://www.epa.gov/safewater/methods/sourcalt.html
                                   Organic and Inorganic Compounds in
                                   Drinking Water, Volume 1
    EPA
Picloram
               515.4 Rev 1.0     Determination of Chlorinated Acids in   April 2000    EPA/815/B-00/001
                               Drinking Water by Liquid-Liquid
                               Microextraction, Derivatization, and
                               Fast Gas Chromatography with Electron
                               Capture Detection
http://www.epa.gov/safewater/methods/sourcalt.html
EPA           525.2 Rev 2.0     In Methods for the Determination of    August 1995   EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                               Organic Compounds in Drinking Water-
                               Supplement III

EPA           555 Rev 1.0      In Methods for the Determination of    August 1992   EPA/600/R-92/129   PB92-207703     http://www.nemi.gov
                               Organic Compounds in Drinking Water
                               Supplement II

                                   Accurate determination of the chlorinated esters requires hydrolysis of the sample as described in EPA Methods 515.1, 515.2, 515.3, 515.4, and 555
                                   and ASTM Methods D5317-93 and D5317-98 (Reapproved 2003).
    ASTM         D5317-93        Annual Book of ASTM Standards, Vol.
    International                     11.02
                                                                                                                ASTM International (ASTM)
    ASTM         D5317-98        Annual Book of ASTM Standards, Vol.
    International     (Reapproved     11.02
                   2003)
                                                                                                                http://www.astm.org
    EPA           515.1 Rev 4.0     In Methods for the Determination of    December     EPA/600/4-88-039   PB91-231480     National Technical Information Service (NTIS)
                                   Organic Compounds in Drinking Water  1988,
                                                                     Revised July
                                                                     1991

    EPA           515.2 Rev 1.1     In Methods for the Determination of    August 1995   EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                   Organic Compounds in Drinking Water-
                                   Supplement III

    EPA           515.3 Rev 1.0     In Methods for the Determination of    August2000   EPA 815-R-00-014   PB2000-106981   http://www.epa.gov/safewater/methods/sourcalt.html
                                   Organic and Inorganic Compounds in
                                   Drinking Water, Volume 1
Revised June 2008
                                           Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations
                                Page 17 of 21

-------
Contaminant
                    Method
    Organization  Number
                Reference Title
Date
EPA
Publication
Number
Publication
Order
Number
Source of Method
Picloram
                     Accurate determination of the chlorinated esters requires hydrolysis of the sample as described in EPA Methods 515.1, 515.2, 515.3, 515.4, and 555
                     and ASTM Methods D5317-93 and D5317-98 (Reapproved 2003).
    EPA
515.4 Rev 1.0    Determination of Chlorinated Acids in  April 2000     EPA/815/B-00/001
                Drinking Water by Liquid-Liquid
                Microextraction, Derivatization, and
                Fast Gas Chromatography with Electron
                Capture Detection
                                                 http://www.epa.gov/safewater/methods/sourcalt.html
    EPA
555 Rev 1.0      In Methods for the Determination of    August 1992
                Organic Compounds in Drinking Water
                Supplement II
             EPA/600/R-92/129   PB92-207703
                                    http://www.nemi.gov
Simazine
    EPA            505 Rev 2.1      In Methods for the Determination of    August 1995  EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                    Organic Compounds in Drinking Water-
                                    Supplement III
                                         Substitution of the detector specified in Method 505, 507, or 508.1 for the purpose of achieving lower detection limits is allowed as follows. Either
                                         an electron capture or nitrogen phosphorous detector may be used provided all regulatory requirements and quality control criteria are met.

    EPA            507 Rev 2.1      In Methods for the Determination of    August 1995  EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                    Organic Compounds in Drinking Water-
                                    Supplement III
                                         Substitution of the detector specified in Method 505, 507, or 508.1 for the purpose of achieving lower detection limits is allowed as follows. Either
                                         an electron capture or nitrogen phosphorous detector may be used provided all regulatory requirements and quality control criteria are met.

    EPA            508.1 Rev 2.0     In Methods for the Determination of    August 1995  EPA/600/R-95-131   PB95-261616     http://www.nemi.gov
                                    Organic Compounds in Drinking Water-
                                    Supplement III
                                         Substitution of the detector specified in Method 505, 507, or 508.1 for the purpose of achieving lower detection limits is allowed as follows. Either
                                         an electron capture or nitrogen phosphorous detector may be used provided all regulatory requirements and quality control criteria are met.
    EPA
525.2 Rev 2.0    In Methods for the Determination of    August 1995   EPA/600/R-95-131  PB95-261616
                Organic Compounds in Drinking Water-
                Supplement III
                                                 http://www.nemi.gov
    EPA
551.1 Rev 1.0    In Methods for the Determination of    August 1995   EPA/600/R-95-131  PB95-261616
                Organic Compounds in Drinking Water-
                Supplement III
                                                 http://www.nemi.gov
Revised June 2008
                             Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations
                                                                                  Page 18 of 21

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Contaminant
Method
Organization Number

Styrene
EPA 502.2 Rev 2.1
EPA 524. 2 Rev 4.1

Tetrachloroethylene
EPA 502. 2 Rev 2.1
EPA 524. 2 Rev 4.1
EPA 551.1 Rev 1.0

Toluene
EPA 502.2 Rev 2.1
EPA 524. 2 Rev 4.1

Toxaphene
EPA 505 Rev 2.1
EPA 508 Rev 3.1
Reference Title Date


In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III


In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III


In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III


In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
EPA
Publication
Number
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
Publication
Order
Number
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
Source of Method
http://www.nemi
http : //www. nemi

http : //www. nemi

http : //www. nemi
http : //www. nemi
http://www.nemi
http://www.nemi
http://www.nemi
http : //www. nemi

gov
gov

gov

gov
gov
gov
gov
gov
gov

Revised June 2008
Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations
Page 19 of 21

-------
Contaminant
Method
Organization Number

Toxaphene
EPA 508.1 Rev 2.0
EPA 525.2 Rev 2.0

trans-Dichloroethylene
EPA 502. 2 Rev 2.1
EPA 524. 2 Rev 4.1

Trichloroethylene
EPA 502. 2 Rev 2.1
EPA 524. 2 Rev 4.1
EPA 551.1 Rev 1.0

Vinyl chloride
EPA 502.2 Rev 2.1
EPA 524. 2 Rev 4.1
Reference Title Date


In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III


In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III


In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III


In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
In Methods for the Determination of August 1 995
Organic Compounds in Drinking Water-
Supplement III
EPA
Publication
Number
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
EPA/600/R-95-131
Publication
Order
Number
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
PB95-261616
Source of Method
http://www.nemi
http : //www. nemi

http : //www. nemi

http : //www. nemi
http : //www. nemi
http://www.nemi
http://www.nemi
http://www.nemi
http : //www. nemi

gov
gov

gov

gov
gov
gov
gov
gov
gov

Revised June 2008
Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations
Page 20 of 21

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Contaminant
                Method
   Organization Number
             Reference Title
                                                      Date
EPA
Publication
Number
Publication
Order
Number
Source of Method
Xylenes (total)
EPA
502.2Rev2.1    In Methods for the Determination of   August 1995  EPA/600/R-95-131  PB95-261616
             Organic Compounds in Drinking Water-
             Supplement III
                                                                                                 http://www.nemi.gov
EPA
524.2Rev4.1    In Methods for the Determination of   August 1995  EPA/600/R-95-131  PB95-261616
             Organic Compounds in Drinking Water-
             Supplement III
                                                                                                 http://www.nemi.gov
Contact information for methods that are not available on the Internet are summarized in the report titled "Sources
of Approved Analytical Methods for National Drinking Water Regulations."
Revised June 2008
                       Approved Methods for Organic Contaminants - National Primary Drinking Water Regulations
                                                                                                                        Page 21 of 21

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