40 CFR 136.3 — § 136.3 Identification of test procedures.

(a) Parameters or pollutants, for which methods are approved, are listed together with test procedure descriptions and references in Tables IA, IB, IC, ID, IE, IF, IG, and IH of this section. The methods listed in Tables IA, IB, IC, ID, IE, IF, IG, and IH are incorporated by reference, see paragraph (b) of this section, with the exception of EPA Methods 200.7, 601-613, 624.1, 625.1, 1613, 1624, and 1625. The full texts of Methods 601-613, 624.1, 625.1, 1613, 1624, and 1625 are printed in appendix A of this part, and the full text of Method 200.7 is printed in appendix C of this part. The full text for determining the method detection limit when using the test procedures is given in appendix B of this part. In the event of a conflict between the reporting requirements of 40 CFR parts 122 and 125 and any reporting requirements associated with the methods listed in these tables, the provisions of 40 CFR parts 122 and 125 are controlling and will determine a permittee's reporting requirements. The full texts of the referenced test procedures are incorporated by reference into Tables IA, IB, IC, ID, IE, IF, IG, and IH. The date after the method number indicates the latest editorial change of the method. The discharge parameter values for which reports are required must be determined by one of the standard analytical test procedures incorporated by reference and described in Tables IA, IB, IC, ID, IE, IF, IG, and IH or by any alternate test procedure which has been approved by the Administrator under the provisions of paragraph (d) of this section and §§ 136.4 and 136.5. Under certain circumstances (paragraph (c) of this section, § 136.5(a) through (d) or 40 CFR 401.13,) other additional or alternate test procedures may be used.

docket-customerservice@epa.gov.www.archives.gov/federal-register/cfr/ibr-locationsfr.inspection@nara.gov.(b) The material listed in this paragraph (b) is incorporated by reference into this section with the approval of the Director of the Federal Register under 5 U.S.C. 552(a) and 1 CFR part 51. All approved incorporation by reference (IBR) material is available for inspection at the EPA and at the National Archives and Records Administration (NARA). Contact the EPA at: EPA's Water Docket, EPA West, 1301 Constitution Avenue NW, Room 3334, Washington, DC 20004; telephone: 202-566-2426; email: For information on the availability of this material at NARA, visit or email The material may be obtained from the following sources in this paragraph (b).

http://water.epa.gov/scitech/methods/cwa/index.cfm(1) Environmental Monitoring and Support Laboratory, U.S. Environmental Protection Agency, Cincinnati OH (US EPA). Available at or from: National Technical Information Service, 5285 Port Royal Road, Springfield, Virginia 22161

(i) Microbiological Methods for Monitoring the Environment, Water, and Wastes. 1978. EPA/600/8-78/017, Pub. No. PB-290329/A.S.

(A) Part III Analytical Methodology, Section B Total Coliform Methods, page 108. Table IA, Note 3; Table IH, Note 3.

(B) Part III Analytical Methodology, Section B Total Coliform Methods, 2.6.2 Two-Step Enrichment Procedure, page 111. Table IA, Note 3; Table IH, Note 3.

(C) Part III Analytical Methodology, Section B Total Coliform Methods, 4 Most Probable Number (MPN) Method, page 114. Table IA, Note 3; Table IH, Note 3.

(D) Part III Analytical Methodology, Section C Fecal Coliform Methods, 2 Direct Membrane Filter (MF) Method, page 124. Table IA, Note 3; Table IH, Note 3.

(E) Part III, Analytical Methodology, Section C Fecal Coliform Methods, 5 Most Probable Number (MPN) Method, page 132. Table IA, Note 3; Table IH, Note 3.

(F) Part III Analytical Methodology, Section D Fecal Streptococci, 2 Membrane Filter (MF) Method, page 136. Table IA, Note 3; Table IH, Note 3.

(G) Part III Analytical Methodology, Section D Fecal Streptococci, 4 Most Probable Number Method, page 139. Table IA, Note 3; Table IH, Note 3.

(H) Part III Analytical Methodology, Section D Fecal Streptococci, 5 Pour Plate Method, page 143. Table IA, Note 3; Table IH, Note 3.

(ii) [Reserved]

http://water.epa.gov/scitech/methods/cwa/index.cfm.(2) Environmental Monitoring and Support Laboratory, U.S. Environmental Protection Agency, Cincinnati OH (US EPA). Available at

(i) Method 300.1 (including Errata Cover Sheet, April 27, 1999), Determination of Inorganic Ions in Drinking Water by Ion Chromatography, Revision 1.0, 1997. Table IB, Note 52.

(ii) Method 551, Determination of Chlorination Disinfection Byproducts and Chlorinated Solvents in Drinking Water by Liquid-Liquid Extraction and Gas Chromatography With Electron-Capture Detection. 1990. Table IF.

http://water.epa.gov/scitech/methods/cwa/index.cfm(3) National Exposure Risk Laboratory-Cincinnati, U.S. Environmental Protection Agency, Cincinnati OH (US EPA). Available from or from the National Technical Information Service (NTIS), 5285 Port Royal Road, Springfield, VA 22161. Telephone: 800-553-6847.

(i) Methods for the Determination of Inorganic Substances in Environmental Samples. August 1993. EPA/600/R-93/100, Pub. No. PB 94120821. Table IB, Note 52.

(A) Method 180.1, Determination of Turbidity by Nephelometry. Revision 2.0. Table IB, Note 52.

(B) Method 300.0, Determination of Inorganic Anions by Ion Chromatography. Revision 2.1. Table IB, Note 52.

(D) Method 350.1, Determination of Ammonium Nitrogen by Semi-Automated Colorimetry. Revision 2.0. Table IB, Notes 30 and 52.

(E) Method 351.2, Determination of Total Kjeldahl Nitrogen by Semi-Automated Colorimetry. Revision 2.0. Table IB, Note 52.

(F) Method 353.2, Determination of Nitrate-Nitrite Automated Colorimetry. Revision 2.0. Table IB, Note 52.

(G) Method 365.1, Determination of Phosphorus by Automated Colorimetry. Revision 2.0. Table IB, Note 52.

(H) Method 375.2, Determination of Sulfate by Automated Colorimetry. Revision 2.0. Table IB, Note 52.

(I) Method 410.4, Determination of Chemical Oxygen Demand by Semi-Automated Colorimetry. Revision 2.0. Table IB, Note 52.

(ii) Methods for the Determination of Metals in Environmental Samples, Supplement I. May 1994. EPA/600/R-94/111, Pub. No. PB 95125472. Table IB, Note 52.

(A) Method 200.7, Determination of Metals and Trace Elements in Water and Wastes by Inductively Coupled Plasma-Atomic Emission Spectrometry. Revision 4.4. Table IB, Note 52.

(B) Method 200.8, Determination of Trace Elements in Water and Wastes by Inductively Coupled Plasma Mass Spectrometry. Revision 5.3. Table IB, Note 52.

(C) Method 200.9, Determination of Trace Elements by Stabilized Temperature Graphite Furnace Atomic Absorption Spectrometry. Revision 2.2. Table IB, Note 52.

(D) Method 218.6, Determination of Dissolved Hexavalent Chromium in Drinking Water, Groundwater, and Industrial Wastewater Effluents by Ion Chromatography. Revision 3.3. Table IB, Note 52.

(E) Method 245.1, Determination of Mercury in Water by Cold Vapor Atomic Absorption Spectrometry. Revision 3.0. Table IB, Note 52.

http://water.epa.gov/scitech/methods/cwa/index.cfm.(4) National Exposure Risk Laboratory-Cincinnati, U.S. Environmental Protection Agency, Cincinnati OH (US EPA). Available at

(i) EPA Method 200.5, Determination of Trace Elements in Drinking Water by Axially Viewed Inductively Coupled Plasma-Atomic Emission Spectrometry. Revision 4.2, October 2003. EPA/600/R-06/115. Table IB, Note 68.

(ii) EPA Method 525.2, Determination of Organic Compounds in Drinking Water by Liquid-Solid Extraction and Capillary Column Gas Chromatography/Mass Spectrometry. Revision 2.0, 1995. Table ID, Note 10.

http://water.epa.gov/scitech/methods/cwa/index.cfm(5) Office of Research and Development, Cincinnati OH. U.S. Environmental Protection Agency, Cincinnati OH (US EPA). Available at or from ORD Publications, CERI, U.S. Environmental Protection Agency, Cincinnati OH 45268.

(i) Methods for Benzidine, Chlorinated Organic Compounds, Pentachlorophenol, and Pesticides in Water and Wastewater. 1978. Table IC, Note 3; Table ID, Note 3.

(ii) Methods for Chemical Analysis of Water and Wastes. March 1979. EPA-600/4-79-020. Table IB, Note 1.

(iii) Methods for Chemical Analysis of Water and Wastes. Revised March 1983. EPA-600/4-79-020. Table IB, Note 1.

(A) Method 120.1, Conductance, Specific Conductance, µmhos at 25 °C. Revision 1982. Table IB, Note 1.

3(B) Method 130.1, Hardness, Total (mg/L as CaCO), Colorimetric, Automated EDTA. Issued 1971. Table IB, Note 1.

(D) Method 160.4, Residue, Volatile, Gravimetric, Ignition at 550 °C. Issued 1971. Table IB, Note 1.

(E) Method 206.5, Arsenic, Sample Digestion Prior to Total Arsenic Analysis by Silver Diethyldithiocarbamate or Hydride Procedures. Issued 1978. Table IB, Note 1.

(F) Method 231.2, Gold, Atomic Absorption, Furnace Technique. Issued 1978. Table IB, Note 1.

(G) Method 245.2, Mercury, Automated Cold Vapor Technique. Issued 1974. Table IB, Note 1.

(H) Method 252.2, Osmium, Atomic Absorption, Furnace Technique. Issued 1978. Table IB, Note 1.

(I) Method 253.2, Palladium, Atomic Absorption, Furnace Technique. Issued 1978. Table IB, Note 1.

(J) Method 255.2, Platinum, Atomic Absorption, Furnace Technique. Issued 1978. Table IB, Note 1.

(K) Method 265.2, Rhodium, Atomic Absorption, Furnace Technique. Issued 1978. Table IB, Note 1.

(L) Method 279.2, Thallium, Atomic Absorption, Furnace Technique. Issued 1978. Table IB, Note 1.

(M) Method 283.2, Titanium, Atomic Absorption, Furnace Technique. Issued 1978. Table IB, Note 1.

(N) Method 289.2, Zinc, Atomic Absorption, Furnace Technique. Issued 1978. Table IB, Note 1.

(O) Method 310.2, Alkalinity, Colorimetric, Automated, Methyl Orange. Revision 1974. Table IB, Note 1.

(P) Method 351.1, Nitrogen, Kjeldahl, Total, Colorimetric, Automated Phenate. Revision 1978. Table IB, Note 1.

(Q) Method 352.1, Nitrogen, Nitrate, Colorimetric, Brucine. Issued 1971. Table IB, Note 1.

(R) Method 365.3, Phosphorus, All Forms, Colorimetric, Ascorbic Acid, Two Reagent. Issued 1978. Table IB, Note 1.

(S) Method 365.4, Phosphorus, Total, Colorimetric, Automated, Block Digestor AA II. Issued 1974. Table IB, Note 1.

(T) Method 410.3, Chemical Oxygen Demand, Titrimetric, High Level for Saline Waters. Revision 1978. Table IB, Note 1.

(U) Method 420.1, Phenolics, Total Recoverable, Spectrophotometric, Manual 4-AAP With Distillation. Revision 1978. Table IB, Note 1.

(iv) Prescribed Procedures for Measurement of Radioactivity in Drinking Water. 1980. EPA-600/4-80-032. Table IE.

(A) Method 900.0, Gross Alpha and Gross Beta Radioactivity. Table IE.

(B) Method 903.0, Alpha-Emitting iRadio Isotopes. Table IE.

(D) Appendix B, Error and Statistical Calculations. Table IE.

http://water.epa.gov/scitech/methods/cwa/index.cfm.(6) Office of Science and Technology, U.S. Environmental Protection Agency, Washington DC (US EPA). Available at

(i) Method 1625C, Semivolatile Organic Compounds by Isotope Dilution GCMS. 1989. Table IF.

(ii) [Reserved]

http://water.epa.gov/scitech/methods/cwa/index.cfm(7) Office of Water, U.S. Environmental Protection Agency, Washington DC (US EPA). Available at or from National Technical Information Service, 5285 Port Royal Road, Springfield, Virginia 22161.

(i) Method 1631, Mercury in Water by Oxidation, Purge and Trap, and Cold Vapor Atomic Fluorescence Spectrometry. Revision E, August 2002. EPA-821-R-02-019, Pub. No. PB2002-108220. Table IB, Note 43.

(ii) Kelada-01, Kelada Automated Test Methods for Total Cyanide, Acid Dissociable Cyanide, and Thiocyanate. Revision 1.2, August 2001. EPA 821-B-01-009, Pub. No. PB 2001-108275. Table IB, Note 55.

Analytical Methods for the Determination of Pollutants in Pharmaceutical Manufacturing Industry Wastewaters.(iii) In the compendium July 1998. EPA 821-B-98-016, Pub. No. PB95201679. Table IF, Note 1.

(A) EPA Method 1666, Volatile Organic Compounds Specific to the Pharmaceutical Industry by Isotope Dilution GC/MS. Table IF, Note 1.

(B) EPA Method 1667, Formaldehyde, Isobutyraldehyde, and Furfural by Derivatization Followed by High Performance Liquid Chromatography. Table IF.

(iv) Methods For The Determination of Nonconventional Pesticides In Municipal and Industrial Wastewater, Volume I. Revision I, August 1993. EPA 821-R-93-010A, Pub. No. PB 94121654. Tables ID, IG.

(A) Method 608.1, Organochlorine Pesticides. Table ID, Note 10; Table IG, Note 3.

(B) Method 608.2, Certain Organochlorine Pesticides. Table ID, Note 10; Table IG, Note 3.

(D) Method 614.1, Organophosphorus Pesticides. Table ID, Note 10; Table IG, Note 3.

(E) Method 615, Chlorinated Herbicides. Table ID, Note 10; Table IG, Note 3.

(F) Method 617, Organohalide Pesticides and PCBs. Table ID, Note 10; Table IG, Note 3.

(G) Method 619, Triazine Pesticides. Table ID, Note 10; Table IG, Note 3.

(H) Method 622, Organophosphorus Pesticides. Table ID, Note 10; Table IG, Note 3.

(I) Method 622.1, Thiophosphate Pesticides. Table ID, Note 10; Table IG, Note 3.

(J) Method 627, Dinitroaniline Pesticides. Table ID, Note 10; Table IG, Notes 1 and 3.

(K) Method 629, Cyanazine. Table IG, Note 3.

(L) Method 630, Dithiocarbamate Pesticides. Table IG, Note 3.

(M) Method 630.1, Dithiocarbamate Pesticides. Table IG, Note 3.

(N) Method 631, Benomyl and Carbendazim. Table IG, Note 3.

(O) Method 632, Carbamate and Urea Pesticides. Table ID, Note 10; Table IG, Note 3.

(P) Method 632.1, Carbamate and Amide Pesticides. Table IG, Note 3.

(Q) Method 633, Organonitrogen Pesticides. Table IG, Note 3.

(R) Method 633.1, Neutral Nitrogen-Containing Pesticides. Table IG, Note 3.

(S) Method 637, MBTS and TCMTB. Table IG, Note 3.

(T) Method 644, Picloram. Table IG, Note 3.

(U) Method 645, Certain Amine Pesticides and Lethane. Table IG, Note 3.

(V) Method 1656, Organohalide Pesticides. Table ID, Note 10; Table IG, Notes 1 and 3.

(W) Method 1657, Organophosphorus Pesticides. Table ID, Note 10; Table IG, Note 3.

(X) Method 1658, Phenoxy-Acid Herbicides. Table IG, Note 3.

(Y) Method 1659, Dazomet. Table IG, Note 3.

(Z) Method 1660, Pyrethrins and Pyrethroids. Table IG, Note 3.

(AA) Method 1661, Bromoxynil. Table IG, Note 3.

(BB) Ind-01. Methods EV-024 and EV-025, Analytical Procedures for Determining Total Tin and Triorganotin in Wastewater. Table IG, Note 3.

(v) Methods For The Determination of Nonconventional Pesticides In Municipal and Industrial Wastewater, Volume II. August 1993. EPA 821-R-93-010B, Pub. No. PB 94166311. Table IG.

(A) Method 200.9, Determination of Trace Elements by Stabilized Temperature Graphite Furnace Atomic Absorption Spectrometry. Table IG, Note 3.

(B) Method 505, Analysis of Organohalide Pesticides and Commercial Polychlorinated Biphenyl (PCB) Products in Water by Microextraction and Gas Chromatography. Table ID, Note 10; Table IG, Note 3.

(C) Method 507, The Determination of Nitrogen- and Phosphorus-Containing Pesticides in Water by Gas Chromatography with a Nitrogen-Phosphorus Detector. Table ID, Note 10; Table IG, Note 3.

(D) Method 508, Determination of Chlorinated Pesticides in Water by Gas Chromatography with an Electron Capture Detector. Table ID, Note 10; Table IG, Note 3.

(E) Method 515.1, Determination of Chlorinated Acids in Water by Gas Chromatography with an Electron Capture Detector. Table IG, Notes 2 and 3.

(F) Method 515.2, Determination of Chlorinated Acids in Water Using Liquid-Solid Extraction and Gas Chromatography with an Electron Capture Detector. Table IG, Notes 2 and 3.

(G) Method 525.1, Determination of Organic Compounds in Drinking Water by Liquids-Solid Extraction and Capillary Column Gas Chromatography/Mass Spectrometry. Table ID, Note 10; Table IG, Note 3.

(H) Method 531.1, Measurement of N-Methylcarbamoyloximes and N-Methylcarbamates in Water by Direct Aqueous Injection HPLC with Post-Column Derivatization. Table ID, Note 10; Table IG, Note 3.

(I) Method 547, Determination of Glyphosate in Drinking Water by Direct-Aqueous-Injection HPLC, Post-Column Derivatization, and Fluorescence Detection. Table IG, Note 3.

(J) Method 548, Determination of Endothall in Drinking Water by Aqueous Derivatization, Liquid-Solid Extraction, and Gas Chromatography with Electron-Capture Detector. Table IG, Note 3.

(K) Method 548.1, Determination of Endothall in Drinking Water by Ion-Exchange Extraction, Acidic Methanol Methylation and Gas Chromatography/Mass Spectrometry. Table IG, Note 3.

(L) Method 553, Determination of Benzidines and Nitrogen-Containing Pesticides in Water by Liquid-Liquid Extraction or Liquid-Solid Extraction and Reverse Phase High Performance Liquid Chromatography/Particle Beam/Mass Spectrometry Table ID, Note 10; Table IG, Note 3.

(M) Method 555, Determination of Chlorinated Acids in Water by High Performance Liquid Chromatography With a Photodiode Array Ultraviolet Detector. Table IG, Note 3.

Methods for the Determination of Organic Compounds in Drinking Water.(vi) In the compendium Revised July 1991, December 1998. EPA-600/4-88-039, Pub. No. PB92-207703. Table IF.

(A) EPA Method 502.2, Volatile Organic Compounds in Water by Purge and Trap Capillary Column Gas Chromatography with Photoionization and Electrolytic Conductivity Detectors in Series. Table IF.

(B) [Reserved]

Methods for the Determination of Organic Compounds in Drinking Water-Supplement II.(vii) In the compendium August 1992. EPA-600/R-92-129, Pub. No. PB92-207703. Table IF.

(A) EPA Method 524.2, Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry. Table IF.

(B) [Reserved]

(viii) Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, Fifth Edition. October 2002. EPA 821-R-02-012, Pub. No. PB2002-108488. Table IA, Note 26.

(ix) Short-Term Methods for Measuring the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms, Fourth Edition. October 2002. EPA 821-R-02-013, Pub. No. PB2002-108489. Table IA, Note 27.

(x) Short-Term Methods for Measuring the Chronic Toxicity of Effluents and Receiving Waters to Marine and Estuarine Organisms, Third Edition. October 2002. EPA 821-R-02-014, Pub. No. PB2002-108490. Table IA, Note 28.

www.epa.gov/cwa-methods.(8) Office of Water, U.S. Environmental Protection Agency (U.S. EPA), mail code 4303T, 1301 Constitution Avenue NW, Washington, DC 20460; website:

(i) Method 245.7, Mercury in Water by Cold Vapor Atomic Fluorescence Spectrometry. Revision 2.0, February 2005. EPA-821-R-05-001. Table IB, Note 17.

Escherichia coli (E. coli)Escherichia coli(ii) Method 1103.2: in Water by Membrane Filtration Using membrane-Thermotolerant Agar (mTEC), EPA-821-R-23-009. September 2023. Table IH, Note 18.

Enterococcus(iii) Method 1106.2: Enterococci in Water by Membrane Filtration Using membrane--Esculin Iron Agar (mE-EIA), EPA-821-R-23-007. September 2023. Table IH, Note 22.

Enterococcus(iv) Method 1600.1: Enterococci in Water by Membrane Filtration Using membrane- Indoxyl-β-D-Glucoside Agar (mEI), EPA-821-R-23-006, September 2023. Table 1A, Note 24; Table IH, Note 23.

Escherichia coli (E. coli)Escherichia coli(v) Method 1603.1: in Water by Membrane Filtration Using Modified membrane-Thermotolerant Agar (Modified mTEC), EPA-821-R-23-008, September 2023. Table IA, Note 21; Table IH, Note 19.

Escherichia coliE. coli(vi) Method 1604: Total Coliforms and () in Water by Membrane Filtration Using a Simultaneous Detection Technique (MI Medium). September 2002. EPA-821-R-02-024. Table IH, Note 21.

(vii) Whole Effluent Toxicity Methods Errata Sheet, EPA 821-R-02-012-ES. December 2016, Table IA, Notes 25, 26, and 27.

CryptosporidiumGiardia(viii) Method 1623: and in Water by Filtration/IMS/FA. December 2005. EPA-821-R-05-002. Table IH, Note 26.

CryptosporidiumGiardia(ix) Method 1623.1: and in Water by Filtration/IMS/FA. EPA 816-R-12-001. January 2012. U.S. EPA, Table IH, Notes 25 and 31.

(x) Method 1627, Kinetic Test Method for the Prediction of Mine Drainage Quality. December 2011. EPA-821-R-09-002. Table IB, Note 69.

nn(xi) Method 1664, -Hexane Extractable Material (HEM; Oil and Grease) and Silica Gel Treated -Hexane Extractable Material (SGT-HEM; Nonpolar Material) by Extraction and Gravimetry. Revision A, February 1999. EPA-821-R-98-002. Table IB, Notes 38 and 42.

nn(xii) Method 1664, -Hexane Extractable Material (HEM; Oil and Grease) and Silica Gel Treated -Hexane Extractable Material (SGT-HEM; Nonpolar Material) by Extraction and Gravimetry, Revision B, February 2010. EPA-821-R-10-001. Table IB, Notes 38 and 42.

(xiii) Method 1669, Sampling Ambient Water for Trace Metals at EPA Water Quality Criteria Levels. July 1996. Table IB, Note 43.

(xiv) Method 1680: Fecal Coliforms in Sewage Sludge (Biosolids) by Multiple-Tube Fermentation using Lauryl Tryptose Broth (LTB) and EC Medium. September 2014. EPA-821-R-14-009.Table IA, Note 15.

(xv) Method 1681: Fecal Coliforms in Sewage Sludge (Biosolids) by Multiple-Tube Fermentation using A-1 Medium. July 2006. EPA 821-R-06-013. Table IA, Note 20.

Salmonella(xvi) Method 1682: in Sewage Sludge (Biosolids) by Modified Semisolid Rappaport-Vassiliadis (MSRV) Medium. September 2014. EPA 821-R-14-012. Table IA, Note 23.

(9) American National Standards Institute, 1430 Broadway, New York NY 10018.

(i) ANSI. American National Standard on Photographic Processing Effluents. April 2, 1975. Table IB, Note 9.

(ii) [Reserved]

www.standardmethods.org.(10) American Public Health Association, 800 I Street, NW, Washington, DC 20001; phone: (202)777-2742, website:

Standard Methods for the Examination of Water and Wastewater.(i) 14th Edition, 1975. Table IB, Notes 27 and 86.

(ii) Standard Methods for the Examination of Water and Wastewater. 15th Edition, 1980, Table IB, Note 30; Table ID.

(iii) Selected Analytical Methods Approved and Cited by the United States Environmental Protection Agency, Supplement to the 15th Edition of Standard Methods for the Examination of Water and Wastewater. 1981. Table IC, Note 6; Table ID, Note 6.

(iv) Standard Methods for the Examination of Water and Wastewater. 18th Edition, 1992. Tables IA, IB, IC, ID, IE, and IH.

(v) Standard Methods for the Examination of Water and Wastewater. 19th Edition, 1995. Tables IA, IB, IC, ID, IE, and IH.

(vi) Standard Methods for the Examination of Water and Wastewater. 20th Edition, 1998. Tables IA, IB, IC, ID, IE, and IH.

(vii) Standard Methods for the Examination of Water and Wastewater. 21st Edition, 2005. Table IB, Notes 17 and 27.

(viii) 2120, Color. Revised September 4, 2021. Table IB.

(ix) 2130, Turbidity. Revised 2020. Table IB.

(x) 2310, Acidity. Revised 2020. Table IB.

(xi) 2320, Alkalinity. Revised 2021. Table IB.

(xii) 2340, Hardness. Revised 2021. Table IB.

(xiii) 2510, Conductivity. Revised 2021. Table IB.

(xiv) 2540, Solids. Revised 2020. Table IB.

(xv) 2550, Temperature. 2010. Table IB.

(xvi) 3111, Metals by Flame Atomic Absorption Spectrometry. Revised 2019. Table IB.

(xvii) 3112, Metals by Cold-Vapor Atomic Absorption Spectrometry. Revised 2020. Table IB.

(xviii) 3113, Metals by Electrothermal Atomic Absorption Spectrometry. Revised 2020. Table IB.

(xix) 3114, Arsenic and Selenium by Hydride Generation/Atomic Absorption Spectrometry. Revised 2020, Table IB.

(xx) 3120, Metals by Plasma Emission Spectroscopy. Revised 2020. Table IB.

(xxi) 3125, Metals by Inductively Coupled Plasma-Mass Spectrometry. Revised 2020. Table IB.

(xxii) 3500-Al, Aluminum. Revised 2020. Table IB.

(xxiii) 3500-As, Arsenic. Revised 2020. Table IB.

(xxiv) 3500-Ca, Calcium. Revised 2020. Table IB.

(xxv) 3500-Cr, Chromium. Revised 2020. Table IB.

(xxvi) 3500-Cu, Copper. Revised 2020. Table IB.

(xxvii) 3500-Fe, Iron. 2011. Table IB.

(xxviii) 3500-Pb, Lead. Revised 2020. Table IB.

(xxix) 3500-Mn, Manganese. Revised 2020. Table IB.

(xxx) 3500-K, Potassium. Revised 2020. Table IB.

(xxxi) 3500-Na, Sodium. Revised 2020. Table IB.

(xxxii) 3500-V, Vanadium. 2011. Table IB.

(xxxiii) 3500-Zn, Zinc. Revised 2020. Table IB.

(xxxiv) 4110, Determination of Anions by Ion Chromatography. Revised 2020. Table IB.

(xxxv) 4140, Inorganic Anions by Capillary Ion Electrophoresis. Revised 2020. Table IB.

(xxxvi) 4500-B, Boron. 2011. Table IB.

−(xxxvii) 4500 Cl, Chloride. Revised 2021. Table IB.

(xxxviii) 4500-Cl, Chlorine (Residual). 2011. Table IB.

−(xxxix) 4500-CN, Cyanide. Revised 2021. Table IB.

−(xl) 4500-F, Fluoride. Revised 2021. Table IB.

+(xli) 4500-H , pH. 2021. Table IB.

3(xlii) 4500-NH, Nitrogen (Ammonia). Revised 2021. Table IB.

2−(xliii) 4500-NO, Nitrogen (Nitrite). Revised 2021. Table IB.

3−(xliv) 4500-NO, Nitrogen (Nitrate). Revised 2019. Table IB.

(org)(xlv) 4500-N, Nitrogen (Organic). Revised 2021. Table IB.

(xlvi) 4500-O, Oxygen (Dissolved). Revised 2021. Table IB.

(xlvii) 4500-P, Phosphorus. Revised 2021. Table IB.

2(xlviii) 4500-SiO, Silica. Revised 2021. Table IB.

2−(xlix) 4500-S, Sulfide. Revised 2021. Table IB.

32−(l) 4500-SO, Sulfite. Revised 2021. Table IB.

42−(li) 4500-SO, Sulfate. Revised 2021. Table IB.

(lii) 5210, Biochemical Oxygen Demand (BOD). Revised 2016. Table IB.

(liii) 5220, Chemical Oxygen Demand (COD). 2011. Table IB.

(liv) 5310, Total Organic Carbon (TOC). Revised 2014. Table IB.

(lv) 5520, Oil and Grease. Revised 2021. Table IB.

(lvi) 5530, Phenols. Revised 2021. Table IB.

(lvii) 5540, Surfactants. Revised 2021. Table IB.

(lviii) 6200, Volatile Organic Compounds. Revised 2020. Table IC.

(lix) 6410, Extractable Base/Neutrals and Acids. Revised 2020. Tables IC and ID.

(lx) 6420, Phenols. Revised 2021. Table IC.

(lxi) 6440, Polynuclear Aromatic Hydrocarbons. Revised 2021. Table IC.

(lxii) 6630, Organochlorine Pesticides. Revised 2021. Table ID.

(lxiii) 6640, Acidic Herbicide Compounds. Revised 2021. Table ID.

(lxiv) 7110, Gross Alpha and Gross Beta Radioactivity (Total, Suspended, and Dissolved). 2000. Table IE.

(lxv) 7500, Radium. 2001. Table IE.

(lxvi) 9213, Recreational Waters. 2007. Table IH.

(lxvii) 9221, Multiple-Tube Fermentation Technique for Members of the Coliform Group. Approved 2014. Table IA, Notes 12, 14; and 33; Table IH, Notes 10, 12, and 32.

(lxviii) 9222, Membrane Filter Technique for Members of the Coliform Group. 2015. Table IA, Note 31; Table IH, Note 17.

(lxix) 9223 Enzyme Substrate Coliform Test. 2016. Table IA; Table IH.

(lxx) 9230 Fecal Enterococcus/Streptococcus Groups. 2013. Table IA, Note 32; Table IH.

(11) The Analyst, The Royal Society of Chemistry, RSC Publishing, Royal Society of Chemistry, Thomas Graham House, Science Park, Milton Road, Cambridge CB4 0WF, United Kingdom. (Also available from most public libraries.)

(i) Spectrophotometric Determination of Ammonia: A Study of a Modified Berthelot Reaction Using Salicylate and Dichloroisocyanurate. Krom, M.D. 105:305-316, April 1980. Table IB, Note 60.

(ii) [Reserved]

(12) Analytical Chemistry, ACS Publications, 1155 Sixteenth St. NW., Washington DC 20036. (Also available from most public libraries.)

(i) Spectrophotometric and Kinetics Investigation of the Berthelot Reaction for the Determination of Ammonia. Patton, C.J. and S.R. Crouch. 49(3):464-469, March 1977. Table IB, Note 60.

(ii) [Reserved]

(13) AOAC International, 481 North Frederick Avenue, Suite 500, Gaithersburg, MD 20877-2417.

(i) Official Methods of Analysis of AOAC International. 16th Edition, 4th Revision, 1998.

(A) 920.203, Manganese in Water, Persulfate Method. Table IB, Note 3.

(B) 925.54, Sulfate in Water, Gravimetric Method. Table IB, Note 3.

(D) 973.41, pH of Water. Table IB, Note 3.

(E) 973.43, Alkalinity of Water, Titrimetric Method. Table IB, Note 3.

(F) 973.44, Biochemical Oxygen Demand (BOD) of Water, Incubation Method. Table IB, Note 3.

(G) 973.45, Oxygen (Dissolved) in Water, Titrimetric Methods. Table IB, Note 3.

(H) 973.46, Chemical Oxygen Demand (COD) of Water, Titrimetric Methods. Table IB, Note 3.

(I) 973.47, Organic Carbon in Water, Infrared Analyzer Method. Table IB, Note 3.

(J) 973.48, Nitrogen (Total) in Water, Kjeldahl Method. Table IB, Note 3.

(K) 973.49, Nitrogen (Ammonia) in Water, Colorimetric Method. Table IB, Note 3.

(L) 973.50, Nitrogen (Nitrate) in Water, Brucine Colorimetric Method. Table IB, Note 3.

(M) 973.51, Chloride in Water, Mercuric Nitrate Method. Table IB, Note 3.

(N) 973.52, Hardness of Water. Table IB, Note 3.

(O) 973.53, Potassium in Water, Atomic Absorption Spectrophotometric Method. Table IB, Note 3.

(P) 973.54, Sodium in Water, Atomic Absorption Spectrophotometric Method. Table IB, Note 3.

(Q) 973.55, Phosphorus in Water, Photometric Method. Table IB, Note 3.

(R) 973.56, Phosphorus in Water, Automated Method. Table IB, Note 3.

(S) 974.27, Cadmium, Chromium, Copper, Iron, Lead, Magnesium, Manganese, Silver, Zinc in Water, Atomic Absorption Spectrophotometric Method. Table IB, Note 3.

(T) 977.22, Mercury in Water, Flameless Atomic Absorption Spectrophotometric Method. Table IB, Note 3.

Escherichia coli(U) 991.15. Total Coliforms and in Water Defined Substrate Technology (Colilert) Method. Table IA, Note 10; Table IH, Note 10.

(V) 993.14, Trace Elements in Waters and Wastewaters, Inductively Coupled Plasma-Mass Spectrometric Method. Table IB, Note 3.

(W) 993.23, Dissolved Hexavalent Chromium in Drinking Water, Ground Water, and Industrial Wastewater Effluents, Ion Chromatographic Method. Table IB, Note 3.

(X) 993.30, Inorganic Anions in Water, Ion Chromatographic Method. Table IB, Note 3.

(ii) [Reserved]

(14) Applied and Environmental Microbiology, American Society for Microbiology, 1752 N Street NW., Washington DC 20036. (Also available from most public libraries.)

Escherichia coli(i) New Medium for the Simultaneous Detection of Total Coliforms and in Water. Brenner, K.P., C.C. Rankin, Y.R. Roybal, G.N. Stelma, Jr., P.V. Scarpino, and A.P. Dufour. 59:3534-3544, November 1993. Table IH, Note 21.

(ii) [Reserved]

www.astm.org.(15) ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959; phone: (877)909-2786; website:

(i) Annual Book of ASTM Standards, Water, and Environmental Technology, Section 11, Volumes 11.01 and 11.02. 1994. Tables IA, IB, IC, ID, IE, and IH.

(ii) Annual Book of ASTM Standards, Water, and Environmental Technology, Section 11, Volumes 11.01 and 11.02. 1996. Tables IA, IB, IC, ID, IE, and IH.

(iii) Annual Book of ASTM Standards, Water, and Environmental Technology, Section 11, Volumes 11.01 and 11.02. 1999. Tables IA, IB, IC, ID, IE, and IH.

(iv) Annual Book of ASTM Standards, Water, and Environmental Technology, Section 11, Volumes 11.01 and 11.02. 2000. Tables IA, IB, IC, ID, IE, and IH.

(v) ASTM D511-14, Standard Test Methods for Calcium and Magnesium in Water. Approved October 1, 2014. Table IB.

(vi) ASTM D512-12, Standard Test Methods for Chloride Ion in Water. Approved June 15, 2012. Table IB.

(vii) ASTM D515-88, Test Methods for Phosphorus in Water, March 1989. Table IB.

(viii) ASTM D516-16, Standard Test Method for Sulfate Ion in Water. Approved June 1, 2016. Table IB.

(ix) ASTM D858-17, Standard Test Methods for Manganese in Water. Approved June 1, 2017. Table IB.

(x) ASTM D859-16, Standard Test Method for Silica in Water. Approved June 15, 2016. Table IB.

(xi) ASTM D888-18, Standard Test Methods for Dissolved Oxygen in Water. Approved May 1, 2018. Table IB.

(xii) ASTM D1067-16, Standard Test Methods for Acidity or Alkalinity of Water. Approved June 15, 2016. Table IB.

(xiii) ASTM D1068-15, Standard Test Methods for Iron in Water. Approved October 1, 2015. Table IB.

(xiv) ASTM D1125-95 (Reapproved 1999), Standard Test Methods for Electrical Conductivity and Resistivity of Water. December 1995. Table IB.

(xv) ASTM D1126-17, Standard Test Method for Hardness in Water. Approved December 1, 2017. Table IB.

(xvi) ASTM D1179-16, Standard Test Methods for Fluoride Ion in Water. Approved June 15, 2016. Table IB.

(xvii) ASTM D1246-16, Standard Test Method for Bromide Ion in Water. June 15, 2016. Table IB.

(xviii) ASTM D1252-06 (Reapproved 2012), Standard Test Methods for Chemical Oxygen Demand (Dichromate Oxygen Demand) of Water. Approved June 15, 2012. Table IB.

(xix) ASTM D1253-14, Standard Test Method for Residual Chlorine in Water. Approved January 15, 2014. Table IB.

(xx) ASTM D1293-18, Standard Test Methods for pH of Water. Approved January 15, 2018. Table IB.

(xxi) ASTM D1426-15, Standard Test Methods for Ammonia Nitrogen in Water. Approved March 15, 2015. Table IB.

(xxii) ASTM D1687-17, Standard Test Methods for Chromium in Water. Approved June 1, 2017. Table IB.

(xxiii) ASTM D1688-17, Standard Test Methods for Copper in Water. Approved June 1, 2017. Table IB.

(xxiv) ASTM D1691-17, Standard Test Methods for Zinc in Water. Approved June 1, 2017. Table IB.

(xxv) ASTM D1783-01 (Reapproved 2012), Standard Test Methods for Phenolic Compounds in Water. Approved June 15, 2012. Table IB.

(xxvi) ASTM D1886-14, Standard Test Methods for Nickel in Water. Approved October 1, 2014. Table IB.

(xxvii) ASTM D1889-00, Standard Test Method for Turbidity of Water. October 2000. Table IB.

(xxviii) ASTM D1890-96, Standard Test Method for Beta Particle Radioactivity of Water. April 1996. Table IE.

(xxix) ASTM D1943-96, Standard Test Method for Alpha Particle Radioactivity of Water. April 1996. Table IE.

(xxx) ASTM D1976-20, Standard Test Method for Elements in Water by Inductively-Coupled Argon Plasma Atomic Emission Spectroscopy. Approved May 1, 2020. Table IB.

(xxxi) ASTM D2036-09 (Reapproved 2015), Standard Test Methods for Cyanides in Water. Approved July 15, 2015. Table IB.

(xxxii) ASTM D2330-20, Standard Test Method for Methylene Blue Active Substances. Approved January 1, 2020. Table 1B.

(xxxiii) ASTM D2460-97, Standard Test Method for Alpha-Particle-Emitting Isotopes of Radium in Water. October 1997. Table IE.

(xxxiv) ASTM D2972-15, Standard Tests Method for Arsenic in Water. Approved February 1, 2015. Table IB.

(xxxv) ASTM D3223-17, Standard Test Method for Total Mercury in Water. Approved June 1, 2017. Table IB.

(xxxvi) ASTM D3371-95, Standard Test Method for Nitriles in Aqueous Solution by Gas-Liquid Chromatography, February 1996. Table IF.

(xxxvii) ASTM D3373-17, Standard Test Method for Vanadium in Water. Approved June 1, 2017. Table IB.

(xxxviii) ASTM D3454-97, Standard Test Method for Radium-226 in Water. February 1998. Table IE.

(xxxix) ASTM D3557-17, Standard Test Method for Cadmium in Water. Approved June 1, 2017. Table IB.

(xl) ASTM D3558-15, Standard Test Method for Cobalt in Water. Approved February 1, 2015. Table IB.

(xli) ASTM D3559-15, Standard Test Methods for Lead in Water. Approved June 1, 2015. Table IB.

(xlii) ASTM D3590-17, Standard Test Methods for Total Kjeldahl Nitrogen in Water. Approved June 1, 2017. Table IB.

(xliii) ASTM D3645-15, Standard Test Methods for Beryllium in Water. Approved February 1, 2015. Table IB.

(xliv) ASTM D3695-95, Standard Test Method for Volatile Alcohols in Water by Direct Aqueous-Injection Gas Chromatography. April 1995. Table IF.

(xlv) ASTM D3859-15, Standard Test Methods for Selenium in Water. Approved March 15, 2015. Table IB.

(xlvi) ASTM D3867-16, Standard Test Method for Nitrite-Nitrate in Water. Approved June 1, 2016. Table IB.

(xlvii) ASTM D4190-15, Standard Test Method for Elements in Water by Direct- Current Plasma Atomic Emission Spectroscopy. Approved February 1, 2015. Table IB.

(xlviii) ASTM D4282-15, Standard Test Method for Determination of Free Cyanide in Water and Wastewater by Microdiffusion. Approved July 15, 2015. Table IB.

(xlix) ASTM D4327-17, Standard Test Method for Anions in Water by Suppressed Ion Chromatography. Approved December 1, 2017. Table IB.

(l) ASTM D4382-18, Standard Test Method for Barium in Water, Atomic Absorption Spectrophotometry, Graphite Furnace. Approved February 1, 2018. Table IB.

(li) ASTM D4657-92 (Reapproved 1998), Standard Test Method for Polynuclear Aromatic Hydrocarbons in Water. January 1993. Table IC.

(lii) ASTM D4658-15, Standard Test Method for Sulfide Ion in Water. Approved March 15, 2015. Table IB.

(liii) ASTM D4763-88 (Reapproved 2001), Standard Practice for Identification of Chemicals in Water by Fluorescence Spectroscopy. September 1988. Table IF.

(liv) ASTM D4839-03 (Reapproved 2017), Standard Test Method for Total Carbon and Organic Carbon in Water by Ultraviolet, or Persulfate Oxidation, or Both, and Infrared Detection. Approved December 15, 2017. Table IB.

(lv) ASTM D5257-17, Standard Test Method for Dissolved Hexavalent Chromium in Water by Ion Chromatography. Approved December 1, 2017. Table IB.

(lvi) ASTM D5259-92, Standard Test Method for Isolation and Enumeration of Enterococci from Water by the Membrane Filter Procedure. October 1992. Table IH, Note 9.

Escherichia coli(lvii) ASTM D5392-93, Standard Test Method for Isolation and Enumeration of in Water by the Two-Step Membrane Filter Procedure. September 1993. Table IH, Note 9.

(lviii) ASTM D5673-16, Standard Test Method for Elements in Water by Inductively Coupled Plasma—Mass Spectrometry. Approved February 1, 2016. Table IB.

(lix) ASTM D5907-18, Standard Test Methods for Filterable Matter (Total Dissolved Solids) and Nonfilterable Matter (Total Suspended Solids) in Water. Approved May 1, 2018. Table IB.

(lx) ASTM D6503-99, Standard Test Method for Enterococci in Water Using Enterolert. April 2000. Table IA Note 9, Table IH, Note 9.

(lxi) ASTM. D6508-15, Standard Test Method for Determination of Dissolved Inorganic Anions in Aqueous Matrices Using Capillary Ion Electrophoresis and Chromate Electrolyte. Approved October 1, 2015. Table IB, Note 54.

(lxii) ASTM. D6888-16, Standard Test Method for Available Cyanides with Ligand Displacement and Flow Injection Analysis (FIA) Utilizing Gas Diffusion Separation and Amperometric Detection. Approved February 1, 2016. Table IB, Note 59.

(lxiii) ASTM. D6919-17, Standard Test Method for Determination of Dissolved Alkali and Alkaline Earth Cations and Ammonium in Water and Wastewater by Ion Chromatography. Approved June 1, 2017. Table IB.

p-tert(lxiv) ASTM. D7065-17, Standard Test Method for Determination of Nonylphenol, Bisphenol A, -Octylphenol, Nonylphenol Monoethoxylate and Nonylphenol Diethoxylate in Environmental Waters by Gas Chromatography Mass Spectrometry. Approved December 15, 2017. Table IC.

(lxv) ASTM D7237-18, Standard Test Method for Free Cyanide with Flow Injection Analysis (FIA) Utilizing Gas Diffusion Separation and Amperometric Detection. Approved December 1, 2018. Table IB.

(lxvi) ASTM D7284-20, Standard Test Method for Total Cyanide in Water by Micro Distillation followed by Flow Injection Analysis with Gas Diffusion Separation and Amperometric Detection. Approved August 1, 2020. Table IB.

(lxvii) ASTM D7365-09a (Reapproved 2015), Standard Practice for Sampling, Preservation and Mitigating Interferences in Water Samples for Analysis of Cyanide. Approved July 15, 2015. Table II, Notes 5 and 6.

e1(lxviii) ASTM. D7511-12 (Reapproved 2017) , Standard Test Method for Total Cyanide by Segmented Flow Injection Analysis, In-Line Ultraviolet Digestion and Amperometric Detection. Approved July 1, 2017. Table IB.

e1(lxix) ASTM D7573-18a , Standard Test Method for Total Carbon and Organic Carbon in Water by High Temperature Catalytic Combustion and Infrared Detection. Approved December 15, 2018. Table IB.

(lxx) ASTM D7781-14, Standard Test Method for Nitrite-Nitrate in Water by Nitrate Reductase, Approved April 1, 2014. Table IB.

(16) Bran & Luebbe Analyzing Technologies, Inc., Elmsford NY 10523.

(i) Industrial Method Number 378-75WA, Hydrogen Ion (pH) Automated Electrode Method, Bran & Luebbe (Technicon) Auto Analyzer II. October 1976. Table IB, Note 21.

(ii) [Reserved]

(17) CEM Corporation, P.O. Box 200, Matthews NC 28106-0200.

(i) Closed Vessel Microwave Digestion of Wastewater Samples for Determination of Metals. April 16, 1992. Table IB, Note 36.

(ii) [Reserved]

(18) Craig R. Chinchilla, 900 Jorie Blvd., Suite 35, Oak Brook IL 60523. Telephone: 630-645-0600.

(i) Nitrate by Discrete Analysis Easy (1-Reagent) Nitrate Method, (Colorimetric, Automated, 1 Reagent). Revision 1, November 12, 2011. Table IB, Note 62.

(ii) [Reserved]

www.flowinjection.com/app-notes/epafialab100.(19) FIAlab Instruments, Inc., 334 2151 N. Northlake Way, Seattle, WA 98103; phone: (425)376-0450; website:

(i) FIAlab 100, Determination of Inorganic Ammonia by Continuous Flow Gas Diffusion and Fluorescence Detector Analysis, April 4, 2018. Table IB, Note 82.

(ii) [Reserved]

(20) Hach Company, P.O. Box 389, Loveland CO 80537.

(i) Method 8000, Chemical Oxygen Demand. Hach Handbook of Water Analysis. 1979. Table IB, Note 14.

(ii) Method 8008, 1,10-Phenanthroline Method using FerroVer Iron Reagent for Water. 1980. Table IB, Note 22.

(iii) Method 8009, Zincon Method for Zinc. Hach Handbook for Water Analysis. 1979. Table IB, Note 33.

(iv) Method 8034, Periodate Oxidation Method for Manganese. Hach Handbook for Water Analysis. 1979. Table IB, Note 23.

(v) Method 8506, Bicinchoninate Method for Copper. Hach Handbook of Water Analysis. 1979. Table IB, Note 19.

(vi) Method 8507, Nitrogen, Nitrite—Low Range, Diazotization Method for Water and Wastewater. 1979. Table IB, Note 25.

(vii) Method 10206, Hach Company TNTplus 835/836 Nitrate Method 10206, Spectrophotometric Measurement of Nitrate in Water and Wastewater. Revision 2.1, January 10, 2013. Table IB, Note 75.

(viii) Method 10242, Hach Company TNTplus 880 Total Kjeldahl Nitrogen Method 10242, Simplified Spectrophotometric Measurement of Total Kjeldahl Nitrogen in Water and Wastewater. Revision 1.1, January 10, 2013. Table IB, Note 76.

55(ix) Hach Method 10360, Luminescence Measurement of Dissolved Oxygen in Water and Wastewater and for Use in the Determination of BOD and cBOD. Revision 1.2, October 2011. Table IB, Note 63.

E. coli.(x) m-ColiBlue24® Method, for total Coliforms and Revision 2, 1999. Table IA, Note 18; Table IH, Note 17.

(21) IDEXX Laboratories Inc., One Idexx Drive, Westbrook ME 04092.

(i) Colilert. 2013. Table IA, Notes 17 and 18; Table IH, Notes 14, 15 and 16.

(ii) Colilert-18. 2013. Table IA, Notes 17 and 18; Table IH, Notes 14, 15 and 16.

(iii) Enterolert. 2013. Table IA, Note 24; Table IH, Note 12.

(iv) Quanti-Tray Insert and Most Probable Number (MPN) Table. 2013. Table IA, Note 18; Table IH, Notes 14 and 16.

(22) In-Situ Incorporated, 221 E. Lincoln Ave., Ft. Collins CO 80524. Telephone: 970-498-1500.

(i) In-Situ Inc. Method 1002-8-2009, Dissolved Oxygen Measurement by Optical Probe. 2009. Table IB, Note 64.

(ii) In-Situ Inc. Method 1003-8-2009, Biochemical Oxygen Demand (BOD) Measurement by Optical Probe. 2009. Table IB, Note 10.

(iii) In-Situ Inc. Method 1004-8-2009, Carbonaceous Biochemical Oxygen Demand (CBOD) Measurement by Optical Probe. 2009. Table IB, Note 35.

(23) Journal of Chromatography, Elsevier/North-Holland, Inc., Journal Information Centre, 52 Vanderbilt Avenue, New York NY 10164. (Also available from most public libraries.

(i) Direct Determination of Elemental Phosphorus by Gas-Liquid Chromatography. Addison, R.F. and R.G. Ackman. 47(3): 421-426, 1970. Table IB, Note 28.

(ii) [Reserved]

(24) Lachat Instruments, 6645 W. Mill Road, Milwaukee WI 53218, Telephone: 414-358-4200.

(i) QuikChem Method 10-204-00-1-X, Digestion and Distillation of Total Cyanide in Drinking and Wastewaters using MICRO DIST and Determination of Cyanide by Flow Injection Analysis. Revision 2.2, March 2005. Table IB, Note 56.

(ii) [Reserved]

(25) Leck Mitchell, Ph.D., P.E., 656 Independence Valley Dr., Grand Junction CO 81507. Telephone: 970-244-8661.

(i) Mitchell Method M5271, Determination of Turbidity by Nephelometry. Revision 1.0, July 31, 2008. Table IB, Note 66.

(ii) Mitchell Method M5331, Determination of Turbidity by Nephelometry. Revision 1.0, July 31, 2008. Table IB, Note 65.

(26) MACHEREY-NAGEL GmbH and Co., 2850 Emrick Blvd., Bethlehem, PA 18020; Phone: (888)321-6224.

(i) Method 036/038 NANOCOLOR® COD LR/HR, Spectrophotometric Measurement of Chemical Oxygen Demand in Water and Wastewater, Revision 1.5, May 2018. Table IB, Note 83.

(ii) [Reserved]

(27) Micrology Laboratories, LLC (now known as Roth Bioscience, LLC), 1303 Eisenhower Drive, Goshen, IN 46526; phone: (574)533-3351.

TMTM(i) KwikCount EC Medium E. coli enzyme substrate test, Rapid Detection of E. coli in Beach Water By KwikCount EC Membrane Filtration. 2014. Table IH, Notes 28 and 29.

(ii) [Reserved]

(28) National Council of the Paper Industry for Air and Stream Improvements, Inc. (NCASI), 260 Madison Avenue, New York NY 10016.

(i) NCASI Method TNTP-W10900, Total Nitrogen and Total Phophorus in Pulp and Paper Biologically Treated Effluent by Alkaline Persulfate Digestion. June 2011. Table IB, Note 77.

(ii) NCASI Technical Bulletin No. 253, An Investigation of Improved Procedures for Measurement of Mill Effluent and Receiving Water Color. December 1971. Table IB, Note 18.

(iii) NCASI Technical Bulletin No. 803, An Update of Procedures for the Measurement of Color in Pulp Mill Wastewaters. May 2000. Table IB, Note 18.

(29) The Nitrate Elimination Co., Inc. (NECi), 334 Hecla St., Lake Linden NI 49945.

(i) NECi Method N07-0003, Method for Nitrate Reductase Nitrate-Nitrogen Analysis. Revision 9.0. March 2014. Table IB, Note 73.

(ii) [Reserved]

(30) Oceanography International Corporation, 512 West Loop, P.O. Box 2980, College Station TX 77840.

(i) OIC Chemical Oxygen Demand Method. 1978. Table IB, Note 13.

(ii) [Reserved]

(31) OI Analytical, Box 9010, College Station TX 77820-9010.

(ii) Method PAI-DK01, Nitrogen, Total Kjeldahl, Block Digestion, Steam Distillation, Titrimetric Detection. Revised December 22, 1994. Table IB, Note 39.

(iii) Method PAI-DK02, Nitrogen, Total Kjeldahl, Block Digestion, Steam Distillation, Colorimetric Detection. Revised December 22, 1994. Table IB, Note 40.

(iv) Method PAI-DK03, Nitrogen, Total Kjeldahl, Block Digestion, Automated FIA Gas Diffusion. Revised December 22, 1994. Table IB, Note 41.

(32) ORION Research Corporation, 840 Memorial Drive, Cambridge, Massachusetts 02138.

(i) ORION Research Instruction Manual, Residual Chlorine Electrode Model 97-70. 1977. Table IB, Note 16.

(ii) [Reserved]

(33) Pace Analytical Services, LLC, 1800 Elm Street, SE, Minneapolis, MN 55414; phone: (612)656-2240.

p(i) PAM-16130-SSI, Determination of 2,3,7,8-Substituted Tetra- through Octa-Chlorinated Dibenzo--Dioxins and Dibenzofurans (CDDs/CDFs) Using Shimadzu Gas Chromatography Mass Spectrometry (GC-MS/MS), Revision 1.1, May 20, 2022. Table IC, Note 17.

(ii) [Reserved]

(34) SGS AXYS Analytical Services, Ltd., 2045 Mills Road, Sidney, British Columbia, Canada, V8L 5X2; phone: (888)373-0881.

p(i) SGS AXYS Method 16130, Determination of 2,3,7,8-Substituted Tetra- through Octa-Chlorinated Dibenzo--Dioxins and Dibenzofurans (CDDs/CDFs) Using Waters and Agilent Gas Chromatography-Mass Spectrometry (GC/MS/MS)., Revision 1.0, revised August 2020. Table IC, Note 16.

(ii) [Reserved]

(35) Technicon Industrial Systems, Tarrytown NY 10591.

(i) Industrial Method Number 379-75WE Ammonia, Automated Electrode Method, Technicon Auto Analyzer II. February 19, 1976. Table IB, Note 7.

(ii) [Reserved]

(36) Thermo Jarrell Ash Corporation, 27 Forge Parkway, Franklin MA 02038.

(i) Method AES0029. Direct Current Plasma (DCP) Optical Emission Spectrometric Method for Trace Elemental Analysis of Water and Wastes. 1986, Revised 1991. Table IB, Note 34.

(ii) [Reserved]

www.thermoscientific.com.(37) Thermo Scientific, 166 Cummings Center, Beverly MA 01915. Telephone: 1-800-225-1480.

(i) Thermo Scientific Orion Method AQ4500, Determination of Turbidity by Nephelometry. Revision 5, March 12, 2009. Table IB, Note 67.

(ii) [Reserved]

(38) 3M Corporation, 3M Center Building 220-9E-10, St. Paul MN 55144-1000.

TM(i) Organochlorine Pesticides and PCBs in Wastewater Using Empore Disk” Test Method 3M 0222. Revised October 28, 1994. Table IC, Note 8; Table ID, Note 8.

(ii) [Reserved]

(39) Timberline Instruments, LLC, 1880 South Flatiron Ct., Unit I, Boulder CO 80301.

(i) Timberline Amonia-001, Determination of Inorganic Ammonia by Continuous Flow Gas Diffusion and Conductivity Cell Analysis. June 24, 2011. Table IB, Note 74.

(ii) [Reserved]

ww.usgs.gov.(40) U.S. Geological Survey (USGS), U.S. Department of the Interior, Reston, Virginia. Available from USGS Books and Open-File Reports (OFR) Section, Federal Center, Box 25425, Denver, CO 80225; phone: (703)648-5953; website:

(i) Colorimetric determination of nitrate plus nitrite in water by enzymatic reduction, automated discrete analyzer methods. U.S. Geological Survey Techniques and Methods, Book 5—Laboratory Analysis, Section B—Methods of the National Water Quality Laboratory, Chapter 8. 2011. Table IB, Note 72.

(ii) Techniques and Methods—Book 5, Laboratory Analysis—Section B, Methods of the National Water Quality Laboratory—Chapter 12, Determination of Heat Purgeable and Ambient Purgeable Volatile Organic Compounds in Water by Gas Chromatography/Mass Spectrometry 2016.

(iii) Methods for Determination of Inorganic Substances in Water and Fluvial Sediments, editors, Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 5, Chapter A1. 1979. Table IB, Note 8.

(iv) Methods for Determination of Inorganic Substances in Water and Fluvial Sediments, Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 5, Chapter A1. 1989. Table IB, Notes 2 and 79.

(v) Methods for the Determination of Organic Substances in Water and Fluvial Sediments. Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 5, Chapter A3. 1987. Table IB, Note 24; Table ID, Note 4.

(vi) OFR 76-177, Selected Methods of the U.S. Geological Survey of Analysis of Wastewaters. 1976. Table IE, Note 2.

(vii) OFR 91-519, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Organonitrogen Herbicides in Water by Solid-Phase Extraction and Capillary-Column Gas Chromatography/Mass Spectrometry With Selected-Ion Monitoring. 1992. Table ID, Note 14.

(viii) OFR 92-146, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Total Phosphorus by a Kjeldahl Digestion Method and an Automated Colorimetric Finish That Includes Dialysis. 1992. Table IB, Note 48.

(ix) OFR 93-125, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Inorganic and Organic Constituents in Water and Fluvial Sediments. 1993. Table IB, Notes 51 and 80; Table IC, Note 9.

(x) OFR 93-449, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Chromium in Water by Graphite Furnace Atomic Absorption Spectrophotometry. 1993. Table IB, Note 46.

(xi) OFR 94-37, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Triazine and Other Nitrogen-containing Compounds by Gas Chromatography with Nitrogen Phosphorus Detectors. 1994. Table ID, Note 9.

(xii) OFR 95-181, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Pesticides in Water by C-18 Solid-Phase Extraction and Capillary-Column Gas Chromatography/Mass Spectrometry With Selected-Ion Monitoring. 1995. Table ID, Note 11.

(xiii) OFR 97-198, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Molybdenum in Water by Graphite Furnace Atomic Absorption Spectrophotometry. 1997. Table IB, Note 47.

(xiv) OFR 97-829, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of 86 Volatile Organic Compounds in Water by Gas Chromatography/Mass Spectrometry, Including Detections Less Than Reporting Limits. 1998. Table IC, Note 13.

(xv) OFR 98-165, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Elements in Whole-Water Digests Using Inductively Coupled Plasma-Optical Emission Spectrometry and Inductively Coupled Plasma-Mass Spectrometry. 1998. Table IB, Notes 50 and 81.

(xvi) OFR 98-639, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Arsenic and Selenium in Water and Sediment by Graphite Furnace—Atomic Absorption Spectrometry. 1999. Table IB, Note 49.

(xvii) OFR 00-170, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Ammonium Plus Organic Nitrogen by a Kjeldahl Digestion Method and an Automated Photometric Finish that Includes Digest Cleanup by Gas Diffusion. 2000. Table IB, Note 45.

(xviii) Techniques and Methods Book 5-B1, Determination of Elements in Natural-Water, Biota, Sediment and Soil Samples Using Collision/Reaction Cell Inductively Coupled Plasma-Mass Spectrometry. Chapter 1, Section B, Methods of the National Water Quality Laboratory, Book 5, Laboratory Analysis. 2006. Table IB, Note 70.

(xix) U.S. Geological Survey Techniques of Water-Resources Investigations, Book 5, Laboratory Analysis, Chapter A4, Methods for Collection and Analysis of Aquatic Biological and Microbiological Samples. 1989. Table IA, Note 4; Table IH, Note 4.

(xx) Water-Resources Investigation Report 01-4098, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Moderate-Use Pesticides and Selected Degradates in Water by C-18 Solid-Phase Extraction and Gas Chromatography/Mass Spectrometry. 2001. Table ID, Note 13.

(xxi) Water-Resources Investigations Report 01-4132, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Organic Plus Inorganic Mercury in Filtered and Unfiltered Natural Water With Cold Vapor-Atomic Fluorescence Spectrometry. 2001. Table IB, Note 71.

(xxii) Water-Resources Investigation Report 01-4134, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Pesticides in Water by Graphitized Carbon-Based Solid-Phase Extraction and High-Performance Liquid Chromatography/Mass Spectrometry. 2001. Table ID, Note 12.

(xxiii) Water Temperature—Influential Factors, Field Measurement and Data Presentation, Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 1, Chapter D1. 1975. Table IB, Note 32.

(41) Waters Corporation, 34 Maple Street, Milford MA 01757, Telephone: 508-482-2131, Fax: 508-482-3625.

(i) Method D6508, Test Method for Determination of Dissolved Inorganic Anions in Aqueous Matrices Using Capillary Ion Electrophoresis and Chromate Electrolyte. Revision 2, December 2000. Table IB, Note 54.

(ii) [Reserved]

(c) Under certain circumstances, the Director may establish limitations on the discharge of a parameter for which there is no test procedure in this part or in 40 CFR parts 405 through 499. In these instances the test procedure shall be specified by the Director.

(d) Under certain circumstances, the Administrator may approve additional alternate test procedures for nationwide use, upon recommendation by the Alternate Test Procedure Program Coordinator, Washington, DC.

(e) Sample preservation procedures, container materials, and maximum allowable holding times for parameters are cited in Tables IA, IB, IC, ID, IE, IF, IG, and IH are prescribed in Table II. Information in the table takes precedence over information in specific methods or elsewhere. Any person may apply for a change from the prescribed preservation techniques, container materials, and maximum holding times applicable to samples taken from a specific discharge. Applications for such limited use changes may be made by letters to the Regional Alternative Test Procedure (ATP) Program Coordinator or the permitting authority in the Region in which the discharge will occur. Sufficient data should be provided to assure such changes in sample preservation, containers or holding times do not adversely affect the integrity of the sample. The Regional ATP Coordinator or permitting authority will review the application and then notify the applicant and the appropriate State agency of approval or rejection of the use of the alternate test procedure. A decision to approve or deny any request on deviations from the prescribed Table II requirements will be made within 90 days of receipt of the application by the Regional Administrator. An analyst may not modify any sample preservation and/or holding time requirements of an approved method unless the requirements of this section are met.

Table IA—List of Approved Biological Methods for Wastewater and Sewage SludgeParameter and units1Method EPAStandard methodsAOAC, ASTM, USGSOther Bacteria 1. Coliform (fecal), number per gram dry weightMost Probable Number (MPN), 5 tube, 3 dilution, or311151120p. 132 , 1680 , 1681. 9221 E-2014. 25Membrane filter (MF) , single step3p. 124 299222 D-2015. 2. Coliform (fecal), number per 100 mLMPN, 5 tube, 3 dilution, or3p. 132 339221 E-2014, 9221 F-2014. Multiple tube/multiple well, or131828Colilert-18®. 255MF , single step 3p. 124 299222 D-2015. 4B-0050-85. 3. Coliform (total), number per 100 mLMPN, 5 tube, 3 dilution, or3p. 114 9221 B-2014. 25MF , single step or3p. 108 309222 B-2015. 4B-0025-85. 25MF , two step with enrichment3p. 111 309222 B-2015. E. coli,4. number per 100 mL6816MPN multiple tube, or1214339221 B2014/9221 F-2014. multiple tube/multiple well, or139223 B-2016. 10991.15 1318131718Colilert®. Colilert-18®. 25678MF , two step, or319222 B-2015/9222 I-2015. Single step211603.1 19m-ColiBlue24®. 5. Fecal streptococci, number per 100 mLMPN, 5 tube, 3 dilution, or3p. 139 9230 B-2013. 2MF , or3p. 136 329230 C-2013 4B-0055-85. Plate count3p. 143 6. Enterococci, number per 100 mLMPN, 5 tube, 3 dilution, or3p. 139 9230 B-2013. 68MPN , multiple tube/multiple well, or9230 D-20139D6503-99 1323Enterolert®. 25678MF single step or241600.1 329230 C-2013. Plate count3p. 143. Salmonella117. , number per gram dry weight MPN multiple tube221682 Aquatic Toxicity 508. Toxicity, acute, fresh water organisms, LC, percent effluentCladoceran, Ceriodaphnia dubiaWater flea, acute252002.0. Cladocerans, Daphnia pulexDaphnia magnaWater flea, and acute252021.0. Pimephales promelas,Cyprinella leedsi,Fish, Fathead minnow, and Bannerfin shiner, acute252000.0. Oncorhynchus mykiss,Salvelinus fontinalis,Fish, Rainbow trout, and brook trout, acute252019.0. 509. Toxicity, acute, estuarine and marine organisms of the Atlantic Ocean and Gulf of Mexico, LC, percent effluentMysidopsis bahia,Mysid, acute252007.0. Cyprinodon variegatus,Fish, Sheepshead minnow, acute252004.0. Menidia beryllina, Menidia menidia,Menidia peninsulae,Fish, Silverside, and acute252006.0. 2510. Toxicity, chronic, fresh water organisms, NOEC or IC, percent effluentPimephales promelas,Fish, Fathead minnow, larval survival and growth261000.0. Pimephales promelas,Fish, Fathead minnow, embryo-larval survival and teratogenicity261001.0. Ceriodaphnia dubia,Water flea, Cladoceran, survival and reproduction261002.0. Selenastrum capricornutum,Green alga, growth261003.0. 2511. Toxicity, chronic, estuarine and marine organisms of the Atlantic Ocean and Gulf of Mexico, NOEC or IC, percent effluentCyprinodon variegatus,Fish, Sheepshead minnow, larval survival and growth271004.0. Cyprinodon variegatus,Fish, Sheepshead minnow, embryo-larval survival and teratogenicity271005.0. Menidia beryllina,Fish, Inland silverside, larval survival and growth271006.0. Mysidopsis bahia,Mysid, survival, growth, and fecundity271007.0. Arbacia punctulata,Sea urchin, fertilization271008.0. Table IA notes: 1 The method must be specified when results are reported. 2 A 0.45-µm membrane filter (MF) or other pore size certified by the manufacturer to fully retain organisms to be cultivated and to be free of extractables which could interfere with their growth. 3 Microbiological Methods for Monitoring the Environment, Water and Wastes, EPA/600/8-78/017. 1978. US EPA. 4 U.S. Geological Survey Techniques of Water-Resource Investigations, Book 5, Laboratory Analysis, Chapter A4, Methods for Collection and Analysis of Aquatic Biological and Microbiological Samples. 1989. USGS. 5 Because the MF technique usually yields low and variable recovery from chlorinated wastewaters, the Most Probable Number method will be required to resolve any controversies. 6 Tests must be conducted to provide organism enumeration (density). Select the appropriate configuration of tubes/filtrations and dilutions/volumes to account for the quality, character, consistency, and anticipated organism density of the water sample. 7 When the MF method has been used previously to test waters with high turbidity, large numbers of noncoliform bacteria, or samples that may contain organisms stressed by chlorine, a parallel test should be conducted with a multiple-tube technique to demonstrate applicability and comparability of results. 8Standard Methods for the Examination of Water and Wastewater To assess the comparability of results obtained with individual methods, it is suggested that side-by-side tests be conducted across seasons of the year with the water samples routinely tested in accordance with the most current or EPA alternate test procedure (ATP) guidelines. 9 Annual Book of ASTM Standards—Water and Environmental Technology, Section 11.02. 2000, 1999, 1996. ASTM International. 10 Official Methods of Analysis of AOAC International. 16th Edition, 4th Revision, 1998. AOAC International. 11 Recommended for enumeration of target organism in sewage sludge. 12 The multiple-tube fermentation test is used in 9221B.2-2014. Lactose broth may be used in lieu of lauryl tryptose broth (LTB), if at least 25 parallel tests are conducted between this broth and LTB using the water samples normally tested, and this comparison demonstrates that the false-positive rate and false-negative rate for total coliform using lactose broth is less than 10 percent. No requirement exists to run the completed phase on 10 percent of all total coliform-positive tubes on a seasonal basis. 13 These tests are collectively known as defined enzyme substrate tests. 14 After prior enrichment in a presumptive medium for total coliform using 9221B.2-2014, all presumptive tubes or bottles showing any amount of gas, growth or acidity within 48 h ± 3 h of incubation shall be submitted to 9221F-2014. Commercially available EC-MUG media or EC media supplemented in the laboratory with 50 µg/mL of MUG may be used. 15 Method 1680: Fecal Coliforms in Sewage Sludge (Biosolids) by Multiple-Tube Fermentation Using Lauryl-Tryptose Broth (LTB) and EC Medium, EPA-821-R-14-009. September 2014. U.S. EPA. 16 Samples shall be enumerated by the multiple-tube or multiple-well procedure. Using multiple-tube procedures, employ an appropriate tube and dilution configuration of the sample as needed and report the Most Probable Number (MPN). Samples tested with Colilert® may be enumerated with the multiple-well procedures, Quanti-Tray® or Quanti-Tray®/2000 and the MPN calculated from the table provided by the manufacturer. 17E. coli Colilert-18® is an optimized formulation of the Colilert® for the determination of total coliforms and that provides results within 18 h of incubation at 35 °C rather than the 24 h required for the Colilert® test and is recommended for marine water samples. 18 Descriptions of the Colilert®, Colilert-18®, Quanti-Tray®, and Quanti-Tray®/2000 may be obtained from IDEXX Laboratories, Inc. 19 A description of the mColiBlue24® test is available from Hach Company. 20 Method 1681: Fecal Coliforms in Sewage Sludge (Biosolids) by Multiple-Tube Fermentation Using A-1 Medium, EPA-821-R-06-013. July 2006. U.S. EPA. 21Escherichia coliE. coliEscherichia coli Method 1603.1: () in Water by Membrane Filtration Using Modified membrane-Thermotolerant Agar (Modified mTEC), EPA-821-R-23-008. September 2023. U.S. EPA. 22Salmonella Method 1682: in Sewage Sludge (Biosolids) by Modified Semisolid Rappaport-Vassiliadis (MSRV) Medium, EPA-821-R-14-012. September 2014. U.S. EPA. 23 A description of the Enterolert® test may be obtained from IDEXX Laboratories Inc. 24 Method 1600.1: Enterococci in Water by Membrane Filtration Using Membrane-Enterococcus Indoxyl-β-D-Glucoside Agar (mEI), EPA-821-R-23-006. September 2023. U.S. EPA. 25 Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, EPA-821-R-02-012. Fifth Edition, October 2002. U.S. EPA; and U.S. EPA Whole Effluent Toxicity Methods Errata Sheet, EPA 821-R-02-012-ES. December 2016. 26 Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms, EPA-821-R-02-013. Fourth Edition, October 2002. U.S. EPA; and U.S. EPA Whole Effluent Toxicity Methods Errata Sheet, EPA 821-R-02-012-ES. December 2016. 27 Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Marine and Estuarine Organisms, EPA-821-R-02-014. Third Edition, October 2002. U.S. EPA; and U.S. EPA Whole Effluent Toxicity Methods Errata Sheet, EPA 821-R-02-012-ES. December 2016. 28 To use Colilert-18® to assay for fecal coliforms, the incubation temperature is 44.5 ± 0.2 °C, and a water bath incubator is used. 29 On a monthly basis, at least ten blue colonies from positive samples must be verified using Lauryl Tryptose Broth and EC broth, followed by count adjustment based on these results; and representative non-blue colonies should be verified using Lauryl Tryptose Broth. Where possible, verifications should be done from randomized sample sources. 30 On a monthly basis, at least ten sheen colonies from positive samples must be verified using lauryl tryptose broth and brilliant green lactose bile broth, followed by count adjustment based on these results; and representative non-sheen colonies should be verified using lauryl tryptose broth. Where possible, verifications should be done from randomized sample sources. 31 Subject coliform positive samples determined by 9222 B-2015 or other membrane filter procedure to 9222 I-2015 using NA-MUG media. 32Standard Methods for the Examination of Water and WastewaterEnterococcus.” Verification of colonies by incubation of BHI agar at 10 ± 0.5 °C for 48 ± 3 h is optional. As per the Errata to the 23rd Edition of “Growth on a BHI agar plate incubated at 10 ± 0.5 °C for 48 ± 3 h is further verification that the colony belongs to the genus 33E. coli 9221F. 2-2014 allows for simultaneous detection of and thermotolerant fecal coliforms by adding inverted vials to EC-MUG; the inverted vials collect gas produced by thermotolerant fecal coliforms.

Table IB—List of Approved Inorganic Test ProceduresParameter58Methodology 52EPA 84Standard methods ASTMUSGS/AOAC/Other 31. Acidity (as CaCO), mg/LElectrometric endpoint or phenolphthalein endpoint2310 B-2020D1067-162I-1020-85. 32. Alkalinity (as CaCO), mg/LElectrometric or Colorimetric titration to pH 4.5, Manual2320 B-2021D1067-1632973.43 , I-1030-85. Automatic1310.2 (Rev. 1974) 2I-2030-85. 43. Aluminum—Total, mg/L4Digestion, followed by any of the following: 36AA direct aspiration 3111 D-2019 or 3111 E-20192I-3051-85. AA furnace3113 B-2020. STGFAA200.9 Rev. 2.2 (1994). 36ICP/AES 68200.5 Rev 4.2 (2003) , 200.7 Rev. 4.4 (1994)3120 B-2020D1976-2050I-4471-97. ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-16381993.14 , I-4472-97. 36Direct Current Plasma (DCP) D4190-1534See footnote. Colorimetric (Eriochrome cyanine R)3500-Al B-2020. 4. Ammonia (as N), mg/L6Manual distillation or gas diffusion (pH > 11), followed by any of the following:350.1 Rev. 2.0 (1993)34500-NH B-20213973.49. NesslerizationD1426-15 (A)32973.49 , I-3520-85. Titration34500-NH C-2021. Electrode34500-NH D-2021 or E-2021D1426-15 (B) Manual phenate, salicylate, or other substituted phenols in Berthelot reaction-based methods34500-NH F-202160See footnote. Automated phenate, salicylate, or other substituted phenols in Berthelot reaction-based methods30350.1 Rev. 2.0 (1993)334500-NH G-2021, 4500-NH H-2021280I-4523-85 , I-2522-90. Automated electrode7See footnote. Ion ChromatographyD6919-17 Automated gas diffusion, followed by conductivity cell analysis74Timberline Ammonia-001. Automated gas diffusion followed by fluorescence detector analysis82FIAlab100. 45. Antimony—Total, mg/L4Digestion, followed by any of the following: 36AA direct aspiration 3111 B-2019. AA furnace3113 B-2020. STGFAA200.9 Rev. 2.2 (1994). 36ICP/AES 68200.5 Rev 4.2 (2003) , 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20. ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-16381993.14 , I-4472-97. 46. Arsenic—Total, mg/L4Digestion, followed by any of the following:1206.5 (Issued 1978). AA gaseous hydride3114 B-2020 or 3114 C-2020D2972-15 (B)2I-3062-85. AA furnace3113 B-2020D2972-15 (C)49I-4063-98. STGFAA200.9 Rev. 2.2 (1994). 36ICP/AES 68200.5, Rev 4.2 (2003) , 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20. ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-16370993.14 , I-4020-05. Colorimetric (SDDC)3500-As B-2020D2972-15 (A)2I-3060-85. 47. Barium—Total, mg/L4Digestion, followed by any of the following: 36AA direct aspiration 3111 D-20192I-3084-85. AA furnace3113 B-2020D4382-18. 36ICP/AES 68200.5, Rev 4.2 (2003) , 200.7 Rev. 4.4 (1994)3120 B-202050I-4471-97. ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16381993.14 , I-4472-97. 36DCP 34See footnote. 48. Beryllium—Total, mg/L4Digestion, followed by any of the following: AA direct aspiration3111 D-2019 or 3111 E-2019D3645-15 (A)2I-3095-85. AA furnace3113 B-2020D3645-15 (B). STGFAA200.9, Rev. 2.2 (1994). ICP/AES68200.5 Rev 4.2 (2003) , 200.7 Rev. 4.4 (1994)3120 B-2020D1976-2050I-4471-97. ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16381993.14 , I-4472-97. DCPD4190-1534See footnote. Colorimetric (aluminon)61See footnote 59. Biochemical oxygen demand (BOD), mg/LDissolved Oxygen Depletion855210 B-2016 3981063973.44 p. 17 , I-1578-78 , see footnote. 3710. Boron—Total, mg/LColorimetric (curcumin)4500-B B-20112I-3112-85. ICP/AES68200.5 Rev 4.2 (2003) , 200.7 Rev. 4.4 (1994)3120 B-2020D1976-2050I-4471-97. ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-163993.14. DCPD4190-1534See footnote. 11. Bromide, mg/LElectrodeD1246-162I-1125-85. Ion Chromatography300.0 Rev 2.1 (1993), and 300.1 Rev 1.0 (1997)4110 B-2020, C-2020 or D-2020D4327-17379993.30 , I-2057-85. CIE/UV4140 B-2020D6508-1554D6508 Rev. 2. 412. Cadmium—Total, mg/L4Digestion, followed by any of the following: 36AA direct aspiration 3111 B-2019 or 3111 C-2019D3557-17 (A or B)3922974.27 p. 37 , I-3135-85 or I-3136-85. AA furnace3113 B-2020D3557-17 (D)51I-4138-89. STGFAA200.9 Rev. 2.2 (1994) 36ICP/AES 68200.5 Rev 4.2 (2003) , 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20250I-1472-85 or I-4471-97. ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-16381993.14 , I-4472-97. 36DCP D4190-1534See footnote. 11Voltammetry D3557-17 (C). Colorimetric (Dithizone)3500-Cd D-1990. 413. Calcium—Total, mg/L4Digestion followed by any of the following: AA direct aspiration3111 B-2019 or 3111 D-2019D511-14 (B)2I-3152-85. ICP/AES68200.5 Rev 4.2 (2003), 200.7 Rev. 4.4 (1994)3120 B-202050I-4471-97. ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-163993.14. DCP34See footnote. Titrimetric (EDTA)3500-Ca B-2020D511-14 (A). Ion ChromatographyD6919-17. 51214. Carbonaceous biochemical oxygen demand (CBOD), mg/LDissolved Oxygen Depletion with nitrification inhibitor855210 B-2016 35 63See footnotes. 15. Chemical oxygen demand (COD), mg/LTitrimetric1410.3 (Rev. 1978) 5220 B-2011 or C-2011D1252-06(12) (A)392973.46 p. 17 , I-3560-85. Spectrophotometric, manual or automatic410.4 Rev. 2.0 (1993)5220 D-2011D1252-06(12) (B)1314832See footnotes , I-3561-85. 16. Chloride, mg/LTitrimetric: (silver nitrate)−4500-Cl B-2021D512-12 (B)2I-1183-85. (Mercuric nitrate)−4500-Cl C-2021D512-12 (A)32973.51 , I-1184-85. Colorimetric: manual2I-1187-85. Automated (ferricyanide)−4500-Cl E-20212I-2187-85. Potentiometric Titration−4500-Cl D-2021. Ion Selective ElectrodeD512-12 (C). Ion Chromatography300.0 Rev 2.1 (1993), and 300.1 Rev 1.0 (1997)4110 B-2020 or 4110 C-2020D4327-17351993.30 , I-2057-90. CIE/UV4140 B-2020D6508-1554D6508, Rev. 2. 17. Chlorine—Total residual, mg/LAmperometric direct4500-Cl D-2011D1253-14. Amperometric direct (low level)4500-Cl E-2011. Iodometric direct4500-Cl B-2011. 15Back titration ether end-point 4500-Cl C-2011. DPD-FAS4500-Cl F-2011. Spectrophotometric, DPD4500-Cl G-2011. Electrode16See footnote. 17A. Chlorine—Free Available, mg/LAmperometric direct4500-Cl D-2011D1253-14 Amperometric direct (low level)4500-Cl E-2011. DPD-FAS4500-Cl F-2011. Spectrophotometric, DPD4500-Cl G-2011. 18. Chromium VI dissolved, mg/L0.45-micron filtration followed by any of the following: AA chelation-extraction3111 C-20192I-1232-85. Ion Chromatography218.6 Rev. 3.3 (1994)3500-Cr C-2020D5257-173993.23. Colorimetric (diphenyl-carbazide)3500-Cr B-2020D1687-17 (A)2I-1230-85. 419. Chromium—Total, mg/L4Digestion, followed by any of the following: 36AA direct aspiration 3111 B-2019D1687-17 (B)32974.27 , I-3236-85. AA chelation-extraction3111 C-2019. AA furnace3113 B-2020D1687-17 (C)46I-3233-93. STGFAA200.9 Rev. 2.2 (1994). 36ICP/AES 68200.5 Rev 4.2 (2003) , 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20. ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-1637081993.14 , I-4020-05 I-4472-97. 36DCP D4190-1534See footnote. Colorimetric (diphenyl-carbazide)3500-Cr B-2020. 420. Cobalt—Total, mg/L4Digestion, followed by any of the following: AA direct aspiration3111 B-2019 or 3111 C-2019D3558-15 (A or B)92p. 37 , I-323985. AA furnace3113 B-2020D3558-15 (C)51I-4243-89. STGFAA200.9 Rev. 2.2 (1994). ICP/AES200.7 Rev. 4.4 (1994)3120 B-2020D1976-2050I-4471-97. ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-1637081993.14 , I-4020-05 I-4472-97. DCPD4190-1534See footnote. 21. Color, platinum cobalt units or dominant wavelength, hue, luminance purityColorimetric (ADMI)782120 F-2021. Platinum cobalt visual comparison2120 B-20212I-1250-85. Spectrophotometric18See footnote. 422. Copper—Total, mg/L4Digestion, followed by any of the following: 36AA direct aspiration 3111 B-2019 or 3111 C-2019D1688-17 (A or B)3922974.27 p. 37 , I-3270-85 or I-3271-85. AA furnace3113 B-2020D1688-17 (C)51I-4274-89. STGFAA200.9 Rev. 2.2 (1994). 36ICP/AES 68200.5 Rev 4.2 (2003), 200.7 Rev. 4.4 (1994)3120 B-2020D1976-2050I-4471-97. ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-1637081993.14 , I-4020-05 , I-4472-97. 36DCP D4190-1534See footnote. Colorimetric (Neocuproine)3500-Cu B-2020. Colorimetric (Bathocuproine)3500-Cu C-202019See footnote. 23. Cyanide—Total, mg/LAutomated UV digestion/distillation and Colorimetry55Kelada-01. Segmented Flow Injection, In-Line Ultraviolet Digestion, followed by gas diffusion amperometry−4500-CN P-2021D7511-12 (17). 2Manual distillation with MgCl, followed by any of the following:57335.4 Rev. 1.0 (1993) −4500-CN B-2021 and C-2021D2036-09(15)(A), D7284-205610-204-00-1-X. Flow Injection, gas diffusion amperometryD2036-09(15)(A) D7284-20. Titrimetric−4500-CN D-2021D2036-09(15)(A)9See footnote p. 22. Spectrophotometric, manual−4500-CN E-2021D2036-09(15)(A)2I-3300-85. 20Semi-Automated 57335.4 Rev. 1.0 (1993) −4500-CN N-202156210-204-00-1-X , I-4302-85. Ion ChromatographyD2036-09(15)(A). Ion Selective Electrode−4500-CN F-2021D2036-09(15)(A). 24. Cyanide—Available, mg/L2Cyanide Amenable to Chlorination (CATC); Manual distillation with MgCl, followed by Titrimetric or Spectrophotometric−4500-CN G-2021D2036-09(15)(B). 59Flow injection and ligand exchange, followed by gas diffusion amperometry −4500-CN Q-2021D6888-1644OIA-1677-09. Automated Distillation and Colorimetry (no UV digestion)55Kelada-01. 24A. Cyanide—Free, mg/LFlow Injection, followed by gas diffusion amperometry−4500-CN R-2021D7237-18 (A)44OIA-1677-09. Manual micro-diffusion and colorimetryD4282-15. 25. Fluoride—Total, mg/L6Manual distillation, followed by any of the following:−4500-F B-2021D1179-16 (A). Electrode, manual−4500-F C-2021D1179-16 (B). Electrode, automated−4500-F G-20212I-4327-85. Colorimetric, (SPADNS)−4500-F D-2021. Automated complexone−4500-F E-2021. Ion Chromatography300.0 Rev 2.1 (1993) and 300.1 Rev 1.0 (1997)4110 B-2020 or C-2020D4327-173993.30. CIE/UV4140 B-2020D6508-1554D6508, Rev. 2. 426. Gold—Total, mg/L4Digestion, followed by any of the following: AA direct aspiration3111 B-2019. AA furnace1231.2 (Issued 1978) 3113 B-2020. ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-163993.14. DCP34See footnote. (3)27. Hardness—Total (as CaCO, mg/LAutomated colorimetric1130.1 (Issued 1971). Titrimetric (EDTA)2340 C-2021D1126-1732973.52B , I-1338-85. Ca plus Mg as their carbonates, by any approved method for Ca and Mg (See Parameters 13 and 33), provided that the sum of the lowest point of quantitation for Ca and Mg is below the NPDES permit requirement for Hardness.2340 B-2021. 28. Hydrogen ion (pH), pH unitsElectrometric measurement+4500-H B-2021D1293-18 (A or B)32973.41 , I-1586-85. Automated electrode1150.2 (Dec. 1982) 212See footnote I-2587-85. 429. Iridium—Total, mg/L4Digestion, followed by any of the following: AA direct aspiration3111 B-2019. AA furnace1235.2 (Issued 1978). ICP/MS3125 B-2020. 430. Iron—Total, mg/L4Digestion, followed by any of the following: 36AA direct aspiration 3111 B-2019 or 3111 C-2019D1068-15 (A)32974.27 , I-3381-85. AA furnace3113 B-2020D1068-15 (B). STGFAA200.9, Rev. 2.2 (1994). 36ICP/AES 68200.5 Rev. 4.2 (2003) , 200.7 Rev. 4.4 (1994)3120 B-2020D1976-2050I-4471-97. ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-163993.14. 36DCP D4190-1534See footnote. Colorimetric (Phenanthroline)3500-Fe B-2011D1068-15 (C)22See footnote. 531. Kjeldahl Nitrogen —Total (as N), mg/L20Manual digestion and distillation or gas diffusion, followed by any of the following:org34500-N B-2021 or C-2021 and 4500-NH B-2021D3590-17 (A)45I-4515-91. Titration34500-NH C-20213973.48. NesslerizationD1426-15 (A). Electrode34500-NH D-2021 or E-2021D1426-15 (B). Semi-automated phenate350.1 Rev. 2.0 (1993)334500-NH G-2021 or 4500-NH H-2021. Manual phenate, salicylate, or other substituted phenols in Berthelot reaction based methods34500-NH F-202160See footnote. Automated gas diffusion, followed by conductivity cell analysis74Timberline Ammonia-001. Automated gas diffusion followed by fluorescence detector analysis82FIAlab 100. Automated Methods for TKN that do not require manual distillation Automated phenate, salicylate, or other substituted phenols in Berthelot reaction-based methods colorimetric (auto digestion and distillation)1351.1 (Rev. 1978) 8I-4551-78. Semi-automated block digestor colorimetric (distillation not required)351.2 Rev. 2.0 (1993)org4500-N D-2021D3590-17 (B)45I-4515-91. Block digester, followed by Auto distillation and Titration39See footnote. Block digester, followed by Auto distillation and Nesslerization40See footnote. Block Digester, followed by Flow injection gas diffusion (distillation not required)41See footnote. Digestion with peroxdisulfate, followed by Spectrophotometric (2,6-dimethyl phenol)76Hach 10242. Digestion with persulfate, followed by Colorimetric77NCASI TNTP W10900. 432. Lead—Total, mg/L4Digestion, followed by any of the following: 36AA direct aspiration 3111 B-2019 or 3111 C-2019D3559-15 (A or B)32974.27 , I-3399-85. AA furnace3113 B-2020D3559-15 (D)51I-4403-89. STGFAA200.9 Rev. 2.2 (1994). 36ICP/AES 68200.5 Rev. 4.2 (2003) , 200.7 Rev. 4.4 (1994)3120 B-2020D1976-2050I-4471-97. ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16381993.14 , I-4472-97. 36DCP D4190-1534See footnote. 11Voltammetry D3559-15 (C). Colorimetric (Dithizone)3500-Pb B-2020. 433. Magnesium—Total, mg/L4Digestion, followed by any of the following: AA direct aspiration3111 B-2019D511-14 (B)32974.27 , I-3447-85. ICP/AES68200.5 Rev. 4.2 (2003) , 200.7 Rev. 4.4 (1994)3120 B-2020D1976-2050I-4471-97. ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-163993.14. DCP34See footnote. Ion ChromatographyD6919-17. 434. Manganese—Total, mg/L4Digestion, followed by any of the following: 36AA direct aspiration 3111 B-2019 or 3111 C-2019D858-17 (A or B)32974.27 , I-3454-85. AA furnace3113 B-2020D858-17 (C). STGFAA200.9 Rev. 2.2 (1994). 36ICP/AES 68200.5, Rev. 4.2 (2003) ; 200.7, Rev. 4.4 (1994)3120 B-2020D1976-2050I-4471-97. ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16381993.14 , I-4472-97. 36DCP D4190-1534See footnote. Colorimetric (Persulfate)3500-Mn B-20203920.203. Colorimetric (Periodate)23See footnote. 35. Mercury—Total, mg/LCold vapor, Manual245.1 Rev. 3.0 (1994)3112 B-2020D3223-1732977.22 , I-3462-85. Cold vapor, Automated1245.2 (Issued 1974). Cold vapor atomic fluorescence spectrometry (CVAFS)17245.7 Rev. 2.0 (2005) 71I-4464-01. Purge and Trap CVAFS431631E. 436. Molybdenum—Total, mg/L4Digestion, followed by any of the following: AA direct aspiration3111 D-20192I-3490-85. AA furnace3113 B-202047I-3492-96. ICP/AES200.7 Rev. 4.4 (1994)3120 B-2020D1976-2050I-4471-97. ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16381993.14 , I-4472-97. DCP34See footnote. 437. Nickel—Total, mg/L4Digestion, followed by any of the following: 36AA direct aspiration 3111 B-2019 or 3111 C-2019D1886-14 (A or B)2I-3499-85. AA furnace3113 B-2020D1886-14 (C)51I-4503-89. STGFAA200.9 Rev. 2.2 (1994). 36ICP/AES 68200.5 Rev. 4.2 (2003) , 200.7 Rev. 4.4 (1994)3120 B-2020D1976-2050I-4471-97. ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-1637081993.14 , I-4020-05 , I-4472-97. 36DCP D4190-1534See footnote. 38. Nitrate (as N), mg/LIon Chromatography300.0 Rev. 2.1 (1993) and 300.1 Rev. 1.0 (1997)4110 B-2020 or C-2020D4327-173993.30. CIE/UV4140 B-2020D6508-1554D6508, Rev. 2. Ion Selective Electrode3−4500-NO D-2019. Colorimetric (Brucine sulfate)1352.1 (Issued 1971) 3869973.50 , 419D , p. 28. Spectrophotometric (2,6-dimethylphenol)75Hach 10206. Nitrate-nitrite N minus Nitrite N (see parameters 39 and 40). 39. Nitrate-nitrite (as N), mg/LCadmium reduction, Manual3−4500-NO E-2019D3867-16 (B). Cadmium reduction, Automated353.2 Rev. 2.0 (1993)33−−4500-NO F-2019 or 4500-NO I-2019D3867-16 (A)51I-2545-90. Automated hydrazine3−4500-NO H-2019. Reduction/Colorimetric62See footnote. Ion Chromatography300.0 Rev. 2.1 (1993) and 300.1 Rev. 1.0 (1997)4110 B-2020 or C-2020D4327-173993.30. CIE/UV4140 B-2020D6508-1554D6508, Rev. 2. Enzymatic reduction, followed by automated colorimetric determinationD7781-14727273I-2547-11 , I-2548-11 , N07-0003. Enzymatic reduction, followed by manual colorimetric determination3−4500-NO J-2018. Spectrophotometric (2,6-dimethylphenol)75Hach 10206. 40. Nitrite (as N), mg/LSpectrophotometric: Manual2−4500-NO B-202125See footnote. Automated (Diazotization)26280I-4540-85 see footnote , I-2540-90. Automated (*bypass cadmium reduction)353.2 Rev. 2.0 (1993)33−−4500-NO F-2019, 4500-NO I-2019D3867-16 (A)2I-4545-85. Manual (*bypass cadmium or enzymatic reduction)33−−4500-NO E-2019, 4500-NO J-2018D3867-16 (B). Ion Chromatography300.0 Rev. 2.1 (1993) and 300.1 Rev. 1.0 (1997)4110 B-2020 or C-2020D4327-173993.30. CIE/UV4140 B-2020D6508-1554D6508, Rev. 2. Automated (*bypass Enzymatic reduction)D7781-14727273I-2547-11 , I-2548-11 , N07-0003. 41. Oil and grease—Total recoverable, mg/LnHexane extractable material (HEM): -Hexane extraction and gravimetry421664 Rev. A 1664 Rev. B 385520 B or G-2021. Silica gel treated HEM (SGT-HEM): Silica gel treatment and gravimetry421664 Rev. A, 1664 Rev. B 38385520 B or G-2021 and 5520 F-2021. 42. Organic carbon—Total (TOC), mg/LCombustion5310 B-2014e1D7573-18a324973.47 , p. 14 Heated persulfate or UV persulfate oxidation5310 C-2014, 5310 D-2011D4839-03(17)324973.47 , p. 14 43. Organic nitrogen (as N), mg/LTotal Kjeldahl N (Parameter 31) minus ammonia N (Parameter 4). 44. Ortho-phosphate (as P), mg/LAscorbic acid method: Automated365.1 Rev. 2.0 (1993)4500-P F-2021 or G-20213280973.56 , I-4601-85 , I-2601-90. Manual, single-reagent4500-P E-2021D515-88 (A)3973.55. Manual, two-reagent1365.3 (Issued 1978). Ion Chromatography300.0 Rev. 2.1 (1993) and 300.1 Rev. 1.0 (1997)4110 B-2020 or C-2020D4327-173993.30. CIE/UV4140 B-2020D6508-1554D6508, Rev. 2. 445. Osmium—Total, mg/L4Digestion, followed by any of the following: AA direct aspiration3111 D-2019. AA furnace1252.2 (Issued 1978). 46. Oxygen, dissolved, mg/LWinkler (Azide modification)4500-O (B-F)-2021D888-18 (A)38973.45B , I-1575-78. Electrode4500-O G-2021D888-18 (B)8I-1576-78. Luminescence-Based Sensor4500-O H-2021D888-18 (C)63, 64See footnotes. 447. Palladium—Total, mg/L4Digestion, followed by any of the following: AA direct aspiration3111 B-2019. AA furnace1253.2 (Issued 1978). ICP/MS3125 B-2020. DCP34See footnote. 48. Phenols, mg/L26Manual distillation, followed by any of the following:1420.1 (Rev. 1978) 5530 B-2021D1783-01(12) Colorimetric (4AAP) manual1420.1 (Rev. 1978) 275530 D-2021 D1783-01(12) (A or B). Automated colorimetric (4AAP)420.4 Rev. 1.0 (1993). 49. Phosphorus (elemental), mg/LGas-liquid chromatography28See footnote. 50. Phosphorus—Total, mg/L20Digestion, followed by any of the following:4500-P B (5)-20213973.55. Manual1365.3 (Issued 1978) 4500-P E-2021D515-88 (A). Automated ascorbic acid reduction365.1 Rev. 2.0 (1993)4500-P (F-H)-202132973.56 , I-4600-85. 436ICP/AES 200.7 Rev. 4.4 (1994)3120 B-202050I-4471-97. Semi-automated block digestor (TKP digestion)1365.4 (Issued 1974) D515-88 (B)48I-4610-91. Digestion with persulfate, followed by Colorimetric77NCASI TNTP W10900. 451. Platinum—Total, mg/L4Digestion, followed by any of the following: AA direct aspiration3111 B-2019. AA furnace1255.2 (Issued 1978). ICP/MS3125 B-2020. DCP34See footnote. 452. Potassium—Total, mg/L4Digestion, followed by any of the following: AA direct aspiration3111 B-201932973.5 , I-3630-85. ICP/AES200.7 Rev. 4.4 (1994)3120 B-2020. ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-163993.14. Flame photometric3500-K B-2020. Electrode3500-K C-2020. Ion ChromatographyD6919-17. 53. Residue—Total, mg/LGravimetric, 103-105°2540 B-20202I-3750-85. 54. Residue—filterable, mg/LGravimetric, 180°2540 C-2020D5907-18 (B)2I-1750-85. 55. Residue—non-filterable (TSS), mg/LGravimetric, 103-105° post-washing of residue2540 D-2020D5907-18 (A)2I-3765-85. 56. Residue—settleable, mg/LVolumetric (Imhoff cone), or gravimetric2540 F-2020. 57. Residue—Volatile, mg/LGravimetric, 550°1160.4 (Issued 1971) 2540 E-20202I-3753-85. 458. Rhodium—Total, mg/L4Digestion, followed by any of the following: AA direct aspiration, or3111 B-2019. AA furnace1265.2 (Issued 1978). ICP/MS3125 B-2020. 459. Ruthenium—Total, mg/L4Digestion, followed by any of the following: AA direct aspiration, or3111 B-2019. AA furnace1267.2. ICP/MS3125 B-2020. 460. Selenium—Total, mg/L4Digestion, followed by any of the following: AA furnace3113 B-2020D3859-15 (B)49I-4668-98. STGFAA200.9 Rev. 2.2 (1994). 36ICP/AES 68200.5 Rev 4.2 (2003) , 200.7 Rev. 4.4 (1994)3120 B-2020D1976-20. ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-1637081993.14 , I-4020-05 I-4472-97. AA gaseous hydride3114 B-2020, or 3114 C-2020D3859-15 (A)2I-3667-85. 3761. Silica—Dissolved, mg/L0.45-micron filtration followed by any of the following: Colorimetric, Manual24500-SiO C-2021D859-162I-1700-85. Automated (Molybdosilicate)24500-SiO E-2021 or F-20212I-2700-85. ICP/AES68200.5 Rev. 4.2 (2003), 200.7 Rev. 4.4 (1994)3120 B-202050I-4471-97. ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-163993.14. 4 3162. Silver—Total, mg/L4 29Digestion, followed by any of the following: AA direct aspiration3111 B-2019 or 3111 C-2019392974.27 , p. 37 , I-3720-85. AA furnace3113 B-202051I-4724-89. STGFAA200.9 Rev. 2.2 (1994). ICP/AES68200.5 Rev. 4.2 (2003) , 200.7 Rev. 4.4 (1994)3120 B-2020D1976-2050I-4471-97. ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16381993.14 , I-4472-97. DCP34See footnote. 463. Sodium—Total, mg/L4Digestion, followed by any of the following: AA direct aspiration3111 B-201932973.54 , I-3735-85. ICP/AES68200.5 Rev. 4.2 (2003) , 200.7 Rev. 4.4 (1994)3120 B-202050I-4471-97. ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-163993.14. DCP34See footnote. Flame photometric3500-Na B-2020. Ion ChromatographyD6919-17. 64. Specific conductance, micromhos/cm at 25 °CWheatstone bridge1120.1 (Rev. 1982) 2510 B-2021D1125-95(99) (A)32973.40 , I-2781-85. 465. Sulfate (as SO), mg/LAutomated colorimetric375.2 Rev. 2.0 (1993)42−4500-SO F-2021 or G-2021. Gravimetric42−4500-SO C-2021 or D-20213925.54. Turbidimetric42−4500-SO E-2021D516-16. Ion Chromatography300.0 Rev. 2.1 (1993) and 300.1 Rev. 1.0 (1997)4110 B-2020 or C-2020D4327-17370993.30 , I-4020-05. CIE/UV4140 B-2020D6508-1554D6508 Rev. 2. 66. Sulfide (as S), mg/LSample Pretreatment2−4500-S B, C-2021. Titrimetric (iodine)2−4500-S F-20212I-3840-85. Colorimetric (methylene blue)2−4500-S D-2021. Ion Selective Electrode2−4500-S G-2021D4658-15. 367. Sulfite (as SO), mg/LTitrimetric (iodine-iodate)32−4500-SO B-2021. 68. Surfactants, mg/LColorimetric (methylene blue)5540 C-2021D2330-20. 69. Temperature, °CThermometric2550 B-201032See footnote. 470. Thallium-Total, mg/L4Digestion, followed by any of the following: AA direct aspiration3111 B-2019. AA furnace1279.2 (Issued 1978) 3113 B-2020. STGFAA200.9 Rev. 2.2 (1994). ICP/AES200.7 Rev. 4.4 (1994)3120 B-2020D1976-20. ICP/MS200.8, Rev. 5.4 (1994)3125 B-2020D5673-1635081993.14 , I-4471-97 I-4472-97. 471. Tin—Total, mg/L4Digestion, followed by any of the following: AA direct aspiration3111 B-20198I-3850-78. AA furnace3113 B-2020. STGFAA200.9 Rev. 2.2 (1994). ICP/AES68200.5 Rev. 4.2 (2003) , 200.7 Rev. 4.4 (1994). ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-163993.14. 472. Titanium—Total, mg/L4Digestion, followed by any of the following: AA direct aspiration3111 D-2019. AA furnace1283.2 (Issued 1978). ICP/AES200.7 Rev. 4.4 (1994). ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-163993.14. DCP34See footnote. 5373. Turbidity, NTU Nephelometric180.1, Rev. 2.0 (1993)2130 B-2020D1889-002656667I-3860-85 , see footnotes. 474. Vanadium—Total, mg/L4Digestion, followed by any of the following: AA direct aspiration3111 D-2019. AA furnace3113 B-2020D3373-17. ICP/AES68200.5 Rev. 4.2 (2003) , 200.7 Rev. 4.4 (1994)3120 B-2020D1976-2050I-4471-97. ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-16370993.14 , I-4020-05. DCPD4190-1534See footnote. Colorimetric (Gallic Acid)3500-V B-2011. 475. Zinc—Total, mg/L4Digestion, followed by any of the following: 36AA direct aspiration 3111 B-2019 or 3111 C-2019D1691-17 (A or B)392974.27 p. 37, I-3900-85. AA furnace1289.2 (Issued 1978). 36ICP/AES 68200.5 Rev. 4.2 (2003), 200.7, Rev. 4.4 (1994)3120 B-2020D1976-2050I-4471-97. ICP/MS200.8 Rev. 5.4 (1994)3125 B-2020D5673-1637081993.14, I-4020-05 , I-4472-97. 36DCP D4190-1534See footnote. Colorimetric (Zincon)3500 Zn B-202033See footnote. 76. Acid Mine Drainage691627 Table IB Notes: 1 Methods for Chemical Analysis of Water and Wastes, EPA-600/4-79-020. Revised March 1983 and 1979, where applicable. U.S. EPA. 2 Methods for Analysis of Inorganic Substances in Water and Fluvial Sediments, Techniques of Water-Resource Investigations of the U.S. Geological Survey, Book 5, Chapter A1., unless otherwise stated. 1989. USGS. 3 Official Methods of Analysis of the Association of Official Analytical Chemists, Methods Manual, Sixteenth Edition, 4th Revision, 1998. AOAC International. 4 For the determination of total metals (which are equivalent to total recoverable metals) the sample is not filtered before processing. A digestion procedure is required to solubilize analytes in suspended material and to break down organic-metal complexes (to convert the analyte to a detectable form for colorimetric analysis). For non-platform graphite furnace atomic absorption determinations, a digestion using nitric acid (as specified in Section 4.1.3 of Methods for Chemical Analysis of Water and Wastes) is required prior to analysis. The procedure used should subject the sample to gentle acid refluxing, and at no time should the sample be taken to dryness. For direct aspiration flame atomic absorption (FLAA) determinations, a combination acid (nitric and hydrochloric acids) digestion is preferred, prior to analysis. The approved total recoverable digestion is described as Method 200.2 in Supplement I of “Methods for the Determination of Metals in Environmental Samples” EPA/600R-94/111, May 1994, and is reproduced in EPA Methods 200.7, 200.8, and 200.9 from the same Supplement. However, when using the gaseous hydride technique or for the determination of certain elements such as antimony, arsenic, selenium, silver, and tin by non-EPA graphite furnace atomic absorption methods, mercury by cold vapor atomic absorption, the noble metals and titanium by FLAA, a specific or modified sample digestion procedure may be required, and, in all cases the referenced method write-up should be consulted for specific instruction and/or cautions. For analyses using inductively coupled plasma-atomic emission spectrometry (ICP-AES), the direct current plasma (DCP) technique or EPA spectrochemical techniques (platform furnace AA, ICP-AES, and ICP-MS), use EPA Method 200.2 or an approved alternate procedure (e.g., CEM microwave digestion, which may be used with certain analytes as indicated in this table IB); the total recoverable digestion procedures in EPA Methods 200.7, 200.8, and 200.9 may be used for those respective methods. Regardless of the digestion procedure, the results of the analysis after digestion procedure are reported as “total” metals. 5 Copper sulfate or other catalysts that have been found suitable may be used in place of mercuric sulfate. 6 Manual distillation is not required if comparability data on representative effluent samples are on file to show that this preliminary distillation step is not necessary; however, manual distillation will be required to resolve any controversies. In general, the analytical method should be consulted regarding the need for distillation. If the method is not clear, the laboratory may compare a minimum of 9 different sample matrices to evaluate the need for distillation. For each matrix, a matrix spike and matrix spike duplicate are analyzed both with and without the distillation step (for a total of 36 samples, assuming 9 matrices). If results are comparable, the laboratory may dispense with the distillation step for future analysis. Comparable is defined as <20% RPD for all tested matrices). Alternatively, the two populations of spike recovery percentages may be compared using a recognized statistical test. 7 Industrial Method Number 379-75 WE Ammonia, Automated Electrode Method, Technicon Auto Analyzer II. February 19, 1976. Bran & Luebbe Analyzing Technologies Inc. 8 The approved method is that cited in Methods for Determination of Inorganic Substances in Water and Fluvial Sediments, Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 5, Chapter A1. 1979. USGS. 9 American National Standard on Photographic Processing Effluents. April 2, 1975. American National Standards Institute. 10 In-Situ Method 1003-8-2009, Biochemical Oxygen Demand (BOD) Measurement by Optical Probe. 2009. In-Situ Incorporated. 11 The use of normal and differential pulse voltage ramps to increase sensitivity and resolution is acceptable. 1255555 Carbonaceous biochemical oxygen demand (CBOD) must not be confused with the traditional BOD test method which measures “total 5-day BOD.” The addition of the nitrification inhibitor is not a procedural option but must be included to report the CBOD parameter. A discharger whose permit requires reporting the traditional BOD may not use a nitrification inhibitor in the procedure for reporting the results. Only when a discharger's permit specifically states CBOD is required can the permittee report data using a nitrification inhibitor. 13 OIC Chemical Oxygen Demand Method. 1978. Oceanography International Corporation. 14 Method 8000, Chemical Oxygen Demand, Hach Handbook of Water Analysis, 1979. Hach Company. 15 The back-titration method will be used to resolve controversy. 16 Orion Research Instruction Manual, Residual Chlorine Electrode Model 97-70. 1977. Orion Research Incorporated. The calibration graph for the Orion residual chlorine method must be derived using a reagent blank and three standard solutions, containing 0.2, 1.0, and 5.0 mL 0.00281 N potassium iodate/100 mL solution, respectively. 17 Method 245.7, Mercury in Water by Cold Vapor Atomic Fluorescence Spectrometry, EPA-821-R-05-001. Revision 2.0, February 2005. US EPA. 18 National Council of the Paper Industry for Air and Stream Improvement (NCASI) Technical Bulletin 253 (1971) and Technical Bulletin 803, May 2000. 19 Method 8506, Bicinchoninate Method for Copper, Hach Handbook of Water Analysis. 1979. Hach Company. 20 When using a method with block digestion, this treatment is not required. 21 Industrial Method Number 378-75WA, Hydrogen ion (pH) Automated Electrode Method, Bran & Luebbe (Technicon) Autoanalyzer II. October 1976. Bran & Luebbe Analyzing Technologies. 22 Method 8008, 1,10-Phenanthroline Method using FerroVer Iron Reagent for Water. 1980. Hach Company. 23 Method 8034, Periodate Oxidation Method for Manganese, Hach Handbook of Wastewater Analysis. 1979. Hach Company. 24 Methods for Analysis of Organic Substances in Water and Fluvial Sediments, Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 5, Chapter A3, (1972 Revised 1987). 1987. USGS. 25 Method 8507, Nitrogen, Nitrite-Low Range, Diazotization Method for Water and Wastewater. 1979. Hach Company. 26 Just prior to distillation, adjust the sulfuric-acid-preserved sample to pH 4 with 1 + 9 NaOH. 27 The colorimetric reaction must be conducted at a pH of 10.0 ± 0.2. 28Journal of Chromatograph Addison, R.F., and R.G. Ackman. 1970. Direct Determination of Elemental Phosphorus by Gas-Liquid Chromatography, y, 47(3):421-426. 29223 Approved methods for the analysis of silver in industrial wastewaters at concentrations of 1 mg/L and above are inadequate where silver exists as an inorganic halide. Silver halides such as the bromide and chloride are relatively insoluble in reagents such as nitric acid but are readily soluble in an aqueous buffer of sodium thiosulfate and sodium hydroxide to pH of 12. Therefore, for levels of silver above 1 mg/L, 20 mL of sample should be diluted to 100 mL by adding 40 mL each of 2 M Na S O and NaOH. Standards should be prepared in the same manner. For levels of silver below 1 mg/L the approved method is satisfactory. 30 The use of EDTA decreases method sensitivity. Analysts may omit EDTA or replace with another suitable complexing reagent provided that all method-specified quality control acceptance criteria are met. 31424 For samples known or suspected to contain high levels of silver (e.g., in excess of 4 mg/L), cyanogen iodide should be used to keep the silver in solution for analysis. Prepare a cyanogen iodide solution by adding 4.0 mL of concentrated NH OH, 6.5 g of KCN, and 5.0 mL of a 1.0 N solution of I to 50 mL of reagent water in a volumetric flask and dilute to 100.0 mL. After digestion of the sample, adjust the pH of the digestate to <7 to prevent the formation of HCN under acidic conditions. Add 1 mL of the cyanogen iodide solution to the sample digestate and adjust the volume to 100 mL with reagent water (NOT acid). If cyanogen iodide is added to sample digestates, then silver standards must be prepared that contain cyanogen iodide as well. Prepare working standards by diluting a small volume of a silver stock solution with water and adjusting the pH>7 with NH OH. Add 1 mL of the cyanogen iodide solution and let stand 1 hour. Transfer to a 100-mL volumetric flask and dilute to volume with water. 32 “Water Temperature-Influential Factors, Field Measurement and Data Presentation,” Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 1, Chapter D1. 1975. USGS. 33 Method 8009, Zincon Method for Zinc, Hach Handbook of Water Analysis, 1979. Hach Company. 34 Method AES0029, Direct Current Plasma (DCP) Optical Emission Spectrometric Method for Trace Elemental Analysis of Water and Wastes. 1986—Revised 1991. Thermo Jarrell Ash Corporation. 35 In-Situ Method 1004-8-2009, Carbonaceous Biochemical Oxygen Demand (CBOD) Measurement by Optical Probe. 2009. In-Situ Incorporated. 36 Microwave-assisted digestion may be employed for this metal, when analyzed by this methodology. Closed Vessel Microwave Digestion of Wastewater Samples for Determination of Metals. April 16, 1992. CEM Corporation. 37 When determining boron and silica, only plastic, PTFE, or quartz laboratory ware may be used from start until completion of analysis. 38nn Only use -hexane (-Hexane—85% minimum purity, 99.0% min. saturated C6 isomers, residue less than 1 mg/L) extraction solvent when determining Oil and Grease parameters—Hexane Extractable Material (HEM), or Silica Gel Treated HEM (analogous to EPA Methods 1664 Rev. A and 1664 Rev. B). Use of other extraction solvents is prohibited. 39 Method PAI-DK01, Nitrogen, Total Kjeldahl, Block Digestion, Steam Distillation, Titrimetric Detection. Revised December 22, 1994. OI Analytical. 40 Method PAI-DK02, Nitrogen, Total Kjeldahl, Block Digestion, Steam Distillation, Colorimetric Detection. Revised December 22, 1994. OI Analytical. 41 Method PAI-DK03, Nitrogen, Total Kjeldahl, Block Digestion, Automated FIA Gas Diffusion. Revised December 22, 1994. OI Analytical. 42nnnn Method 1664 Rev. B is the revised version of EPA Method 1664 Rev. A. U.S. EPA. February 1999, Revision A. Method 1664, -Hexane Extractable Material (HEM; Oil and Grease) and Silica Gel Treated -Hexane Extractable Material (SGT-HEM; Non-polar Material) by Extraction and Gravimetry. EPA-821-R-98-002. U.S. EPA. February 2010, Revision B. Method 1664, -Hexane Extractable Material (HEM; Oil and Grease) and Silica Gel Treated -Hexane Extractable Material (SGT-HEM; Non-polar Material) by Extraction and Gravimetry. EPA-821-R-10-001. 43Sampling Ambient Water for Trace Metals at EPA Water Quality Criteria Levels, Method 1631, Revision E, Mercury in Water by Oxidation, Purge and Trap, and Cold Vapor Atomic Fluorescence Spectrometry, EPA-821-R-02-019. Revision E. August 2002, U.S. EPA. The application of clean techniques described in EPA's Method 1669: EPA-821-R-96-011, are recommended to preclude contamination at low-level, trace metal determinations. 44 Method OIA-1677-09, Available Cyanide by Ligand Exchange and Flow Injection Analysis (FIA). 2010. OI Analytical. 45 Open File Report 00-170, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Ammonium Plus Organic Nitrogen by a Kjeldahl Digestion Method and an Automated Photometric Finish that Includes Digest Cleanup by Gas Diffusion. 2000. USGS. 46 Open File Report 93-449, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Chromium in Water by Graphite Furnace Atomic Absorption Spectrophotometry. 1993. USGS. 47 Open File Report 97-198, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Molybdenum by Graphite Furnace Atomic Absorption Spectrophotometry. 1997. USGS. 48 Open File Report 92-146, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Total Phosphorus by Kjeldahl Digestion Method and an Automated Colorimetric Finish That Includes Dialysis. 1992. USGS. 49 Open File Report 98-639, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Arsenic and Selenium in Water and Sediment by Graphite Furnace-Atomic Absorption Spectrometry. 1999. USGS. 50 Open File Report 98-165, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Elements in Whole-water Digests Using Inductively Coupled Plasma-Optical Emission Spectrometry and Inductively Coupled Plasma-Mass Spectrometry. 1998. USGS. 51 Open File Report 93-125, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Inorganic and Organic Constituents in Water and Fluvial Sediments. 1993. USGS. 52 Unless otherwise indicated, all EPA methods, excluding EPA Method 300.1, are published in U.S. EPA. May 1994. Methods for the Determination of Metals in Environmental Samples, Supplement I, EPA/600/R-94/111; or U.S. EPA. August 1993. Methods for the Determination of Inorganic Substances in Environmental Samples, EPA/600/R-93/100. EPA Method 300.1 is U.S. EPA. Revision 1.0, 1997, including errata cover sheet April 27, 1999. Determination of Inorganic Ions in Drinking Water by Ion Chromatography. 53TM Styrene divinyl benzene beads (e.g., AMCO-AEPA-1 or equivalent) and stabilized formazin (e.g., Hach StablCal or equivalent) are acceptable substitutes for formazin. 54 Waters Corp. Now included in ASTM D6508-15, Test Method for Determination of Dissolved Inorganic Anions in Aqueous Matrices Using Capillary Ion Electrophoresis and Chromate Electrolyte. 2015. 55 Kelada-01, Kelada Automated Test Methods for Total Cyanide, Acid Dissociable Cyanide, and Thiocyanate, EPA 821-B-01-009, Revision 1.2, August 2001. US EPA. Note: A 450-W UV lamp may be used in this method instead of the 550-W lamp specified if it provides performance within the quality control (QC) acceptance criteria of the method in a given instrument. Similarly, modified flow cell configurations and flow conditions may be used in the method, provided that the QC acceptance criteria are met. 56 QuikChem Method 10-204-00-1-X, Digestion and Distillation of Total Cyanide in Drinking and Wastewaters using MICRO DIST and Determination of Cyanide by Flow Injection Analysis. Revision 2.2, March 2005. Lachat Instruments. 57 When using sulfide removal test procedures described in EPA Method 335.4, reconstitute particulate that is filtered with the sample prior to distillation. 58 Unless otherwise stated, if the language of this table specifies a sample digestion and/or distillation “followed by” analysis with a method, approved digestion and/or distillation are required prior to analysis. 59 Samples analyzed for available cyanide using OI Analytical method OIA-1677-09 or ASTM method D6888-16 that contain particulate matter may be filtered only after the ligand exchange reagents have been added to the samples, because the ligand exchange process converts complexes containing available cyanide to free cyanide, which is not removed by filtration. Analysts are further cautioned to limit the time between the addition of the ligand exchange reagents and sample filtration to no more than 30 minutes to preclude settling of materials in samples. 60Anal. Chem.The Analyst Analysts should be aware that pH optima and chromophore absorption maxima might differ when phenol is replaced by a substituted phenol as the color reagent in Berthelot Reaction (“phenol-hypochlorite reaction”) colorimetric ammonium determination methods. For example, when phenol is used as the color reagent, pH optimum and wavelength of maximum absorbance are about 11.5 and 635 nm, respectively—see, Patton, C.J. and S.R. Crouch. March 1977. 49:464-469. These reaction parameters increase to pH > 12.6 and 665 nm when salicylate is used as the color reagent—see, Krom, M.D. April 1980. 105:305-316. 61Standard Methods for the Examination of Water and Wastewater If atomic absorption or ICP instrumentation is not available, the aluminon colorimetric method detailed in the 19th Edition of may be used. This method has poorer precision and bias than the methods of choice. 62 Easy (1-Reagent) Nitrate Method, Revision November 12, 2011. Craig Chinchilla. 6355 Hach Method 10360, Luminescence Measurement of Dissolved Oxygen in Water and Wastewater and for Use in the Determination of BOD and CBOD. Revision 1.2, October 2011. Hach Company. This method may be used to measure dissolved oxygen when performing the methods approved in this table IB for measurement of biochemical oxygen demand (BOD) and carbonaceous biochemical oxygen demand (CBOD). 64 In-Situ Method 1002-8-2009, Dissolved Oxygen (DO) Measurement by Optical Probe. 2009. In-Situ Incorporated. 65 Mitchell Method M5331, Determination of Turbidity by Nephelometry. Revision 1.0, July 31, 2008. Leck Mitchell. 66 Mitchell Method M5271, Determination of Turbidity by Nephelometry. Revision 1.0, July 31, 2008. Leck Mitchell. 67 Orion Method AQ4500, Determination of Turbidity by Nephelometry. Revision 5, March 12, 2009. Thermo Scientific. 68 EPA Method 200.5, Determination of Trace Elements in Drinking Water by Axially Viewed Inductively Coupled Plasma-Atomic Emission Spectrometry, EPA/600/R-06/115. Revision 4.2, October 2003. US EPA. 69 Method 1627, Kinetic Test Method for the Prediction of Mine Drainage Quality, EPA-821-R-09-002. December 2011. US EPA. 70 Techniques and Methods Book 5-B1, Determination of Elements in Natural-Water, Biota, Sediment and Soil Samples Using Collision/Reaction Cell Inductively Coupled Plasma-Mass Spectrometry, Chapter 1, Section B, Methods of the National Water Quality Laboratory, Book 5, Laboratory Analysis, 2006. USGS. 71 Water-Resources Investigations Report 01-4132, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Organic Plus Inorganic Mercury in Filtered and Unfiltered Natural Water with Cold Vapor-Atomic Fluorescence Spectrometry, 2001. USGS. 72 USGS Techniques and Methods 5-B8, Chapter 8, Section B, Methods of the National Water Quality Laboratory Book 5, Laboratory Analysis, 2011 USGS. 73 NECi Method N07-0003, “Nitrate Reductase Nitrate-Nitrogen Analysis,” Revision 9.0, March 2014, The Nitrate Elimination Co., Inc. 74 Timberline Instruments, LLC Method Ammonia-001, “Determination of Inorganic Ammonia by Continuous Flow Gas Diffusion and Conductivity Cell Analysis,” June 2011, Timberline Instruments, LLC. 75 Hach Company Method 10206, “Spectrophotometric Measurement of Nitrate in Water and Wastewater,” Revision 2.1, January 2013, Hach Company. 76 Hach Company Method 10242, “Simplified Spectrophotometric Measurement of Total Kjeldahl Nitrogen in Water and Wastewater,” Revision 1.1, January 2013, Hach Company. 77 National Council for Air and Stream Improvement (NCASI) Method TNTP-W10900, “Total (Kjeldahl) Nitrogen and Total Phosphorus in Pulp and Paper Biologically Treated Effluent by Alkaline Persulfate Digestion,” June 2011, National Council for Air and Stream Improvement, Inc. 78 The pH adjusted sample is to be adjusted to 7.6 for NPDES reporting purposes. 79 I-2057-85 in U.S. Geological Survey Techniques of Water-Resources Investigations, Book 5, Chap. A1, Methods for Determination of Inorganic Substances in Water and Fluvial Sediments, 1989. 80 Methods I-2522-90, I-2540-90, and I-2601-90 in U.S. Geological Survey Open-File Report 93-125, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Inorganic and Organic Constituents in Water and Fluvial Sediments, 1993. 81 Method I-4472-97 in U.S. Geological Survey Open-File Report 98-165, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Inorganic and Organic Constituents in Water and Fluvial Sediments, 1998. 82 FIAlab 100, “Determination of Inorganic Ammonia by Continuous Flow Gas Diffusion and Fluorescence Detector Analysis”, April 4, 2018, FIAlab Instruments, Inc. 83 MACHEREY-NAGEL GmbH and Co. Method 036/038 NANOCOLOR® COD LR/HR, “Spectrophotometric Measurement of Chemical Oxygen Demand in Water and Wastewater”, Revision 1.5, May 2018, MACHEREY-NAGEL GmbH and Co. KG. 84www.standardmethods.org Please refer to the following applicable Quality Control Sections: Part 2000 Methods, Physical and Aggregate Properties 2020 (2021); Part 3000 Methods, Metals, 3020 (2021); Part 4000 Methods, Inorganic Nonmetallic Constituents, 4020 (2022); Part 5000 Methods, and Aggregate Organic Constituents, 5020 (2022). These Quality Control Standards are available for download at at no charge. 855 Each laboratory may establish its own control limits by performing at least 25 glucose-glutamic acid (GGA) checks over several weeks or months and calculating the mean and standard deviation. The laboratory may then use the mean ± 3 standard deviations as the control limit for future GGA checks. However, GGA acceptance criteria can be no wider than 198 ± 30.5 mg/L for BOD. GGA acceptance criteria for CBOD must be either 198 ± 30.5 mg/L, or the lab may develop control charts under the following conditions: dissolved oxygen uptake from the seed contribution is between 0.6-1.0 mg/L; control charts are performed on at least 25 GGA checks with three standard deviations from the derived mean; the RSD must not exceed 7.5%; and any single GGA value cannot be less than 150 mg/L or higher than 250 mg/L. 86Standard Methods for the Examination of Water and Wastewater, The approved method is that cited in 14th Edition, 1976.

Table IC—List of Approved Test Procedures for Non-Pesticide Organic Compounds1Parameter Method27EPA 17Standardmethods ASTMOther 1. AcenaphtheneGC610 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. HPLC6106440 B-2021D4657-92 (98). 2. AcenaphthyleneGC610 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. HPLC6106440 B-2021D4657-92 (98). 3. AcroleinGC603 GC/MS4624.1 , 1624B. 4. AcrylonitrileGC603 GC/MS4624.1 , 1624B13O-4127-96. 5. AnthraceneGC610 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. HPLC6106440 B-2021D4657-92 (98). 6. BenzeneGC6026200 C-2020. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 7. BenzidineSpectro-photometric3See footnote p.1. GC/MS5625.1 , 1625B6410 B-2020. HPLC605 8. Benzo(a)anthraceneGC610 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. HPLC6106440 B-2021D4657-92 (98). 9. Benzo(a)pyreneGC610 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. HPLC6106440 B-2021D4657-92 (98). 10. Benzo(b)fluorantheneGC610 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. HPLC6106440 B-2021D4657-92 (98). 11. Benzo(g,h,i)peryleneGC610 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. HPLC6106440 B-2021D4657-92 (98). 12. Benzo(k)fluorantheneGC610 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. HPLC6106440 B-2021D4657-92 (98). 13. Benzyl chlorideGC3See footnote p. 130. GC/MS6See footnote p. S102. 14. Butyl benzyl phthalateGC606 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 15. bis(2-Chloroethoxy) methaneGC611 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 16. bis(2-Chloroethyl) etherGC611 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 17. bis(2-Ethylhexyl) phthalateGC606 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 18. BromodichloromethaneGC6016200 C-2020. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 19. BromoformGC6016200 C-2020. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 20. BromomethaneGC6016200 C-2020. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 21. 4-Bromophenyl phenyl etherGC611 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 22. Carbon tetrachlorideGC6016200 C-20203See footnote p. 130. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 23. 4-Chloro-3-methyl phenolGC6046420 B-2021. GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 24. ChlorobenzeneGC601, 6026200 C-20203See footnote p. 130. GC/MS624.1, 1624B6200 B-20201314O-4127-96 O-4436-16. 25. ChloroethaneGC6016200 C-2020. GC/MS624.1, 1624B6200 B-202013O-4127-96. 26. 2-Chloroethylvinyl etherGC601 GC/MS624.1, 1624B. 27. ChloroformGC6016200 C-20203See footnote p. 130. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 28. ChloromethaneGC6016200 C-2020. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 29. 2-ChloronaphthaleneGC612 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 30. 2-ChlorophenolGC6046420 B-2021. GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 31. 4-Chlorophenyl phenyl etherGC611 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 32. ChryseneGC610 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. HPLC6106440 B-2021D4657-92 (98). 33. Dibenzo(a,h)anthraceneGC610 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. HPLC6106440 B-2021D4657-92 (98). 34. DibromochloromethaneGC6016200 C-2020. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 35. 1,2-DichlorobenzeneGC601, 6026200 C-2020. GC/MS624.1, 1625B6200 B-202091314See footnote p. 27, O-4127-96 , O-4436-16. 36. 1,3-DichlorobenzeneGC601, 6026200 C-2020. GC/MS624.1, 1625B6200 B-2020913See footnote p. 27, O-4127-96. 37. 1,4-DichlorobenzeneGC601, 6026200 C-2020. GC/MS624.1, 1625B6200 B-202091314See footnote p. 27, O-4127-96 , O-4436-16. 38. 3,3′-DichlorobenzidineGC/MS625.1, 1625B6410 B-2020. HPLC605 39. DichlorodifluoromethaneGC601 GC/MS6200 B-20201314O-4127-96 , O-4436-16. 40. 1,1-DichloroethaneGC6016200 C-2020. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 41. 1,2-DichloroethaneGC6016200 C-2020. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 42. 1,1-DichloroetheneGC6016200 C-2020. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. trans43. -1,2-DichloroetheneGC6016200 C-2020. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 44. 2,4-DichlorophenolGC6046420 B-2021. GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 45. 1,2-DichloropropaneGC6016200 C-2020. GC/MS624.1, 1624B6200 B-20201314O-4127-96 O-4436-16. cis46. -1,3-DichloropropeneGC6016200 C-2020. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. trans47. -1,3-DichloropropeneGC6016200 C-2020. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 48. Diethyl phthalateGC606 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 49. 2,4-DimethylphenolGC6046420 B-2021. GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 50. Dimethyl phthalateGC606 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. n51. Di--butyl phthalateGC606 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. n52. Di--octyl phthalateGC606 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 53. 2, 4-DinitrophenolGC6046420 B-20219See footnote p. 27. GC/MS625.1, 1625B6410 B-2020. 54. 2,4-DinitrotolueneGC609 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 55. 2,6-DinitrotolueneGC609 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 56. EpichlorohydrinGC3See footnote p. 130. GC/MS6See footnote p. S102. 57. EthylbenzeneGC6026200 C-2020. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 58. FluorantheneGC610 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. HPLC6106440 B-2021D4657-92 (98). 59. FluoreneGC610 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. HPLC6106440 B-2021D4657-92 (98). 60. 1,2,3,4,6,7,8-Heptachloro-dibenzofuranGC/MS101613B 1516SGS AXYS 16130 , PAM 16130-SSI. 61. 1,2,3,4,7,8,9-Heptachloro-dibenzofuranGC/MS101613B 1516SGS AXYS 16130 , PAM 16130-SSI. p62. 1,2,3,4,6,7,8- Heptachloro-dibenzo--dioxinGC/MS101613B 1516SGS AXYS 16130 , PAM 16130-SSI. 63. HexachlorobenzeneGC612 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 64. HexachlorobutadieneGC612 GC/MS625.1, 1625B6410 B-2020913See footnote p. 27, O-4127-96. 65. HexachlorocyclopentadieneGC612 GC/MS5625.1 , 1625B6410 B-2020913See footnote , p. 27, O-4127-96. 66. 1,2,3,4,7,8-Hexachloro-dibenzofuranGC/MS101613B 1516SGS AXYS 16130 , PAM 16130-SSI. 67. 1,2,3,6,7,8-Hexachloro-dibenzofuranGC/MS101613B 1516SGS AXYS 16130 , PAM 16130-SSI. 68. 1,2,3,7,8,9-Hexachloro-dibenzofuranGC/MS101613B 1516SGS AXYS 16130 , PAM 16130-SSI. 69. 2,3,4,6,7,8-Hexachloro-dibenzofuranGC/MS101613B 1516SGS AXYS 16130 , PAM 16130-SSI. p70. 1,2,3,4,7,8-Hexachloro-dibenzo--dioxinGC/MS101613B 1516SGS AXYS 16130 , PAM 16130-SSI. p71. 1,2,3,6,7,8-Hexachloro-dibenzo--dioxinGC/MS101613B 1516SGS AXYS 16130 , PAM 16130-SSI. p72. 1,2,3,7,8,9-Hexachloro-dibenzo--dioxinGC/MS101613B 1516SGS AXYS 16130 , PAM 16130-SSI. 73. HexachloroethaneGC612 GC/MS625.1, 1625B6410 B-2020913See footnote p. 27, O-4127-96. 74. Indeno(1,2,3-c,d) pyreneGC610 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. HPLC6106440 B-2021D4657-92 (98). 75. IsophoroneGC609 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 76. Methylene chlorideGC6016200 C-20203See footnote p. 130. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 77. 2-Methyl-4,6-dinitrophenolGC6046420 B-2021. GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 78. NaphthaleneGC610 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. HPLC6106440 B-2021. 79. NitrobenzeneGC609 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. HPLCD4657-92 (98). 80. 2-NitrophenolGC6046420 B-2021. GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 81. 4-NitrophenolGC6046420 B-2021. GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 82. N-NitrosodimethylamineGC607 GC/MS5625.1 , 1625B6410 B-20209See footnote p. 27. n83. N-Nitrosodi--propylamineGC607 GC/MS5625.1 , 1625B6410 B-20209See footnote p. 27. 84. N-NitrosodiphenylamineGC607 GC/MS5625.1 , 1625B6410 B-20209See footnote p. 27. 85. OctachlorodibenzofuranGC/MS101613B 1516SGS AXYS 16130 , PAM 16130-SSI. p86. Octachlorodibenzo--dioxinGC/MS101613B 1516SGS AXYS 16130 , PAM 16130-SSI. 1287. 2,2′-oxybis(1-chloropropane) [also known as bis(2-Chloro-1-methylethyl) ether]GC611 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 88. PCB-1016GC608.338See footnote p. 43, see footnote. GC/MS625.16410 B-2020. 89. PCB-1221GC608.338See footnote p. 43, see footnote. GC/MS625.16410 B-2020. 90. PCB-1232GC608.338See footnote p. 43, see footnote. GC/MS625.16410 B-2020. 91. PCB-1242GC608.338See footnote p. 43, see footnote. GC/MS625.16410 B-2020. 92. PCB-1248GC608.338See footnote p. 43, see footnote. GC/MS625.16410 B-2020. 93. PCB-1254GC608.338See footnote p. 43, see footnote. GC/MS625.16410 B-2020. 94. PCB-1260GC608.338See footnote p. 43, see footnote. GC/MS625.16410 B-2020. 95. 1,2,3,7,8-Pentachloro-dibenzofuranGC/MS101613B 1516SGS AXYS 16130 , PAM 16130-SSI. 96. 2,3,4,7,8-Pentachloro-dibenzofuranGC/MS101613B 1516SGS AXYS 16130 , PAM 16130-SSI. p97. 1,2,3,7,8-Pentachloro-dibenzo--dioxinGC/MS101613B 1516SGS AXYS 16130 , PAM 16130-SSI. 98. PentachlorophenolGC6046420 B-20213See footnote p. 140. GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 99. PhenanthreneGC610 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. HPLC6106440 B-2021D4657-92 (98). 100. PhenolGC6046420 B-2021. GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 101. PyreneGC610 GC/MS625.1, 1625B6410 B-20209See footnote p. 27. HPLC6106440 B-2021D4657-92 (98). 102. 2,3,7,8-Tetrachloro-dibenzofuranGC/MS101613B 1516SGS AXYS 16130 , PAM 16130-SSI. p103. 2,3,7,8-Tetrachloro-dibenzo--dioxinGC/MS5613, 625.1 , 1613B1516SGS AXYS 16130 , PAM 16130-SSI. 104. 1,1,2,2-TetrachloroethaneGC6016200 C-20203See footnote p. 130. GC/MS624.1, 1624B6200 B-202013O-4127-96. 105. TetrachloroetheneGC6016200 C-20203See footnote p. 130. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 106. TolueneGC6026200 C-2020. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 107. 1,2,4-TrichlorobenzeneGC6123See footnote p. 130. GC/MS625.1, 1625B6410 B-202091314See footnote p. 27, O-4127-96 , O-4436-16. 108. 1,1,1-TrichloroethaneGC6016200 C-2020. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 109. 1,1,2-TrichloroethaneGC6016200 C-20203See footnote p. 130. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 110. TrichloroetheneGC6016200 C-2020. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 111. TrichlorofluoromethaneGC6016200 C-2020. GC/MS624.16200 B-202013O-4127-96. 112. 2,4,6-TrichlorophenolGC6046420 B-2021. GC/MS625.1, 1625B6410 B-20209See footnote p. 27. 113. Vinyl chlorideGC6016200 C-2020. GC/MS624.1, 1624B6200 B-20201314O-4127-96 , O-4436-16. 114. NonylphenolGC/MSD7065-17. 115. Bisphenol A (BPA)GC/MSD7065-17. p-tert116. -Octylphenol (OP)GC/MSD7065-17. 117. Nonylphenol Monoethoxylate (NP1EO)GC/MSD7065-17. 118. Nonylphenol Diethoxylate (NP2EO)GC/MSD7065-17. 119. Adsorbable Organic Halides (AOX)Adsorption and Coulometric Titration111650 120. Chlorinated PhenolicsIn Situ Acetylation and GC/MS111653 Table IC notes: 1 All parameters are expressed in micrograms per liter (µg/L) except for Method 1613B, in which the parameters are expressed in picograms per liter (pg/L). 2https://www.epa.gov/cwa-methods The full text of Methods 601-613, 1613B, 1624B, and 1625B are provided at appendix A, Test Procedures for Analysis of Organic Pollutants. The standardized test procedure to be used to determine the method detection limit (MDL) for these test procedures is given at appendix B of this part, Definition and Procedure for the Determination of the Method Detection Limit. These methods are available at: as individual PDF files. 3 Methods for Benzidine: Chlorinated Organic Compounds, Pentachlorophenol and Pesticides in Water and Wastewater. September 1978. U.S. EPA. 4 Method 624.1 may be used for quantitative determination of acrolein and acrylonitrile, provided that the laboratory has documentation to substantiate the ability to detect and quantify these analytes at levels necessary to comply with any associated regulations. In addition, the use of sample introduction techniques other than simple purge-and-trap may be required. QC acceptance criteria from Method 603 should be used when analyzing samples for acrolein and acrylonitrile in the absence of such criteria in Method 624.1. 5np Method 625.1 may be extended to include benzidine, hexachlorocyclopentadiene, N-nitrosodimethylamine, N-nitrosodi--propylamine, and N-nitrosodiphenylamine. However, when they are known to be present, Methods 605, 607, and 612, or Method 1625B, are preferred methods for these compounds. Method 625.1 may be applied to 2,3,7,8-Tetrachloro-dibenzo--dioxin for screening purposes only. 6Standard Methods for the Examination of Water and Wastewater. Selected Analytical Methods Approved and Cited by the United States Environmental Protection Agency, Supplement to the 15th Edition of 1981. American Public Health Association (APHA). 7 Each analyst must make an initial, one-time demonstration of their ability to generate acceptable precision and accuracy with Methods 601-603, 1624B, and 1625B in accordance with procedures in Section 8.2 of each of these methods. Additionally, each laboratory, on an on-going basis must spike and analyze 10% (5% for Methods 624.1 and 625.1 and 100% for methods 1624B and 1625B) of all samples to monitor and evaluate laboratory data quality in accordance with Sections 8.3 and 8.4 of these methods. When the recovery of any parameter falls outside the quality control (QC) acceptance criteria in the pertinent method, analytical results for that parameter in the unspiked sample are suspect. The results should be reported but cannot be used to demonstrate regulatory compliance. If the method does not contain QC acceptance criteria, control limits of ±three standard deviations around the mean of a minimum of five replicate measurements must be used. These quality control requirements also apply to the Standard Methods, ASTM Methods, and other methods cited. 8TM Organochlorine Pesticides and PCBs in Wastewater Using Empore Disk. Revised October 28, 1994. 3M Corporation. 9 Method O-3116-87 is in Open File Report 93-125, Methods of Analysis by U.S. Geological Survey National Water Quality Laboratory—Determination of Inorganic and Organic Constituents in Water and Fluvial Sediments. 1993. USGS. 10https://www.epa.gov/cwa-methods/approved-cwa-test-methods-organic-compounds. Analysts may use Fluid Management Systems, Inc. Power-Prep system in place of manual cleanup provided the analyst meets the requirements of Method 1613B (as specified in Section 9 of the method) and permitting authorities. Method 1613, Revision B, Tetra- through Octa-Chlorinated Dioxins and Furans by Isotope Dilution HRGC/HRMS. Revision B, 1994. U.S. EPA. The full text of this method is provided in appendix A to this part and at 11 Method 1650, Adsorbable Organic Halides by Adsorption and Coulometric Titration. Revision C, 1997 U.S. EPA. Method 1653, Chlorinated Phenolics in Wastewater by In Situ Acetylation and GCMS. Revision A, 1997 U.S. EPA. The full text for both of these methods is provided at appendix A in part 430 of this chapter, The Pulp, Paper, and Paperboard Point Source Category. 12 The compound was formerly inaccurately labeled as 2,2′-oxybis(2-chloropropane) and bis(2-chloroisopropyl) ether. Some versions of Methods 611, and 1625 inaccurately list the analyte as “bis(2-chloroisopropyl) ether,” but use the correct CAS number of 108-60-1. 13 Method O-4127-96, U.S. Geological Survey Open-File Report 97-829, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of 86 volatile organic compounds in water by gas chromatography/mass spectrometry, including detections less than reporting limits,1998, USGS. 14 Method O-4436-16 U.S. Geological Survey Techniques and Methods, book 5, chap. B12, Determination of heat purgeable and ambient purgeable volatile organic compounds in water by gas chromatography/mass spectrometry, 2016, USGS. 15phttps://www.sgsaxys.com/wp-content/uploads/2022/09/SGS-AXYS-Method-16130-Rev-1.0.pdf. SGS AXYS Method 16130, “Determination of 2,3,7,8-Substituted Tetra- through Octa-Chlorinated Dibenzo--Dioxins and Dibenzofurans (CDDs/CDFs) Using Waters and Agilent Gas Chromatography-Tandem-Mass Spectrometry (GC/MS/MS), Revision 1.0” is available at: 16ppacelabs.com. Pace Analytical Method PAM-16130-SSI, “Determination of 2,3,7,8-Substituted Tetra- through Octa-Chlorinated Dibenzo--Dioxins and Dibenzofurans (CDDs/CDFs) Using Shimadzu Gas Chromatography Mass Spectrometry (GC-MS/MS), Revision 1.1,” is available at: 17 Please refer to the following applicable Quality Control Section: Part 6000 Individual Organic Compounds, 6020 (2019). The Quality Control Standards are available for download at standardmethods.org at no charge.

1Table ID—List of Approved Test Procedures for Pesticides ParameterMethod2 7 10EPA 15Standardmethods ASTMOther 1. AldrinGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96 (02)348See footnote p. 7, see footnote O-3104-83, see footnote 3M0222. GC/MS625.16410 B-2020. 2. AmetrynGC507, 619396See footnote p. 83, see footnote O-3106-93, see footnote p. S68. GC/MS525.2, 625.114See footnote O-1121-91. 3. AminocarbTLC36See footnote p. 94, see footnote p. S60. HPLC632 4. AtratonGC61936See footnote p. 83, see footnote p. S68. GC/MS625.1. 5. AtrazineGC507, 619, 608.3369See footnote p. 83, see footnote p. S68, see footnote O-3106-93. HPLC/MS12See footnote O-2060-01. GC/MS525.1, 525.2, 625.111See footnote O-1126-95. 6. Azinphos methylGC614, 622, 165736See footnote p. 25, see footnote p. S51. GC-MS625.111See footnote O-1126-95. 7. BarbanTLC36See footnote p. 104, see footnote p. S64. HPLC632 GC/MS625.1. 8. α-BHCGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)38See footnote p. 7, see footnote 3M0222. GC/MS5625.1 6410 B-202011See footnote O-1126-95. 9. β-BHCGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)8See footnote 3M0222. GC/MS625.16410 B-2020. 10. δ-BHCGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)8See footnote 3M0222. GC/MS625.16410 B-2020. 11. γ-BHC (Lindane)GC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)348See footnote p. 7, see footnote , O-3104-83, see footnote 3M0222. GC/MS5625.1 6410 B-202011See footnote , O-1126-95. 12. CaptanGC617, 608.36630 B-2021D3086-90, D5812-96(02)3See footnote p. 7. 13. CarbarylTLC36See footnote p. 94, see footnote p. S60. HPLC531.1, 632. HPLC/MS55312See footnote O-2060-01. GC/MS625.111See footnote O-1126-95. 14. CarbophenothionGC617, 608.36630 B-202146See footnote page 27, see footnote p. S73. GC/MS625.1. 15. ChlordaneGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)348See footnote p. 7, see footnote O-3104-83, see footnote 3M0222. GC/MS625.16410 B-2020. 16. ChloroprophamTLC36See footnote p. 104, see footnote p. S64. HPLC632 GC/MS625.1. 17. 2,4-DGC6156640 B-202134See footnote p. 115, see footnote O-3105-83. HPLC/MS12See footnote O-2060-01. 18. 4,4′-DDDGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)348See footnote p. 7, see footnote O-3105-83, see footnote 3M0222. GC/MS625.16410 B-2020. 19. 4,4′-DDEGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)348See footnote p. 7, see footnote , O-3104-83, see footnote 3M0222. GC/MS625.16410 B-202011See footnote O-1126-95. 20. 4,4′-DDTGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)348See footnote p. 7, see footnote O-3104-83, see footnote 3M0222. GC/MS625.16410 B-2020. 21. Demeton-OGC614, 62236See footnote p. 25, see footnote p. S51. GC/MS625.1 22. Demeton-S.GC614, 62236See footnote p. 25, see footnote p. S51. GC/MS625.1. 23. DiazinonGC507, 614, 622, 1657346See footnote p. 25, see footnote O-3104-83, see footnote p. S51. GC/MS525.2, 625.111See footnote O-1126-95. 24. DicambaGC6153See footnote p. 115. HPLC/MS12See footnote O-2060-01. 25. DichlofenthionGC622.146See footnote page 27, see footnote p. S73. 26. DichloranGC608.2, 617, 608.36630 B-20213See footnote p. 7. 27. DicofolGC617, 608.34See footnote O-3104-83. 28. DieldrinGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)348See footnote p. 7, see footnote O-3104-83, see footnote 3M0222. GC/MS625.16410 B-202011See footnote O-1126-95. 29. DioxathionGC614.1, 165746See footnote page 27, see footnote p. S73. 30. DisulfotonGC507, 614, 622, 165736See footnote p. 25, see footnote p. S51. GC/MS525.2, 625.111See footnote O-1126-95. 31. DiuronTLC36See footnote p. 104, see footnote p. S64. HPLC632 HPLC/MS55312See footnote O-2060-01. 32. Endosulfan IGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)348See footnote p. 7, see footnote O-3104-83, see footnote 3M0222. GC/MS5625.1 6410 B-202013See footnote O-2002-01. 33. Endosulfan IIGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)38See footnote p. 7, see footnote 3M0222. GC/MS5625.1 6410 B-202013See footnote O-2002-01. 34. Endosulfan SulfateGC617, 608.36630 C-20218See footnote 3M0222. GC/MS625.16410 B-2020. 35. EndrinGC505, 508, 617, 1656, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)348See footnote p. 7, see footnote O-3104-83, see footnote 3M0222. GC/MS5525.1, 525.2, 625.1 6410 B-2020. 36. Endrin aldehydeGC617, 608.36630 C-20218See footnote 3M0222. GC/MS625.16410 B-2020. 37. EthionGC614, 614.1, 165746See footnote page 27, see footnote , p. S73. GC/MS625.113See footnote O-2002-01. 38. FenuronTLC36See footnote p. 104, see footnote p. S64. HPLC632 HPLC/MS12See footnote O-2060-01. 39. Fenuron-TCATLC36See footnote p. 104, see footnote p. S64. HPLC632 40. HeptachlorGC505, 508, 617, 1656, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)348See footnote p. 7, see footnote O-3104-83, see footnote 3M0222. GC/MS525.1, 525.2, 625.16410 B-2020. 41. Heptachlor epoxideGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)3468See footnote p. 7, see footnote O-3104-83, see footnote p. S73, see footnote 3M0222. GC/MS625.16410 B-2020. 42. IsodrinGC617, 608.36630 B-2021 & C-202146See footnote O-3104-83, see footnote p. S73. GC/MS625.1. 43. LinuronGC36See footnote p. 104, see footnote p. S64. HPLC632 HPLC/MS55312See footnote O-2060-01. GC/MS11See footnote O-1126-95. 44. MalathionGC614, 16576630 B-202136See footnote p. 25, see footnote p. S51. GC/MS625.111See footnote O-1126-95. 45. MethiocarbTLC36See footnote p. 94, see footnote p. S60. HPLC632 HPLC/MS12See footnote O-2060-01. 46. MethoxychlorGC505, 508, 608.2, 617, 1656, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)348See footnote p. 7, see footnote O-3104-83, see footnote 3M0222. GC/MS525.1, 525.2, 625.111See footnote O-1126-95. 47. MexacarbateTLC36See footnote p. 94, see footnote p. S60. HPLC632 GC/MS625.1. 48. MirexGC617, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)34See footnote p. 7, see footnote O-3104-83. GC/MS625.1. 49. MonuronTLC36See footnote p. 104, see footnote p. S64. HPLC632 50. Monuron-TCATLC36See footnote p. 104, see footnote p. S64. HPLC632 51. NeburonTLC36See footnote p. 104, see footnote p. S64. HPLC632 HPLC/MS12See footnote O-2060-01. 52. Parathion methylGC614, 622, 16576630 B-202143See footnote page 27, see footnote p. 25. GC/MS625.111See footnote O-1126-95. 53. Parathion ethylGC6146630 B-202143See footnote page 27, see footnote p. 25. GC/MS11See footnote O-1126-95. 54. PCNBGC608.1, 617, 608.36630 B-2021 & C-2021,D3086-90 D5812-96(02)3See footnote p. 7. 55. PerthaneGC617, 608.3D3086-90, D5812-96(02)4See footnote O-3104-83. 56. PrometonGC507, 619369See footnote p. 83, see footnote p. S68, see footnote O-3106-93. GC/MS525.2, 625.111See footnote O-1126-95. 57. PrometrynGC507, 619369See footnote p. 83, see footnote p. S68, see footnote O-3106-93. GC/MS525.1, 525.2, 625.113See footnote O-2002-01. 58. PropazineGC507, 619, 1656, 608.3369See footnote p. 83, see footnote p. S68, see footnote O-3106-93. GC/MS525.1, 525.2, 625.1 59. ProphamTLC36See footnote p. 10, see footnote p. S64. HPLC632 HPLC/MS12See footnote O-2060-01. 60. PropoxurTLC36See footnote p. 94, see footnote , p. S60. HPLC632 61. SecbumetonTLC36See footnote p. 83, see footnote p. S68. GC619 62. SiduronTLC36See footnote p. 104, see footnote p. S64. HPLC632 HPLC/MS12See footnote O-2060-01. 63. SimazineGC505, 507, 619, 1656, 608.3369See footnote p. 83, see footnote p. S68, see footnote O-3106-93. GC/MS525.1, 525.2, 625.111See footnote O-1126-95. 64. StrobaneGC617, 608.36630 B-2021 & C-20213See footnote p. 7. 65. SwepTLC36See footnote p. 104, see footnote p. S64. HPLC632 66. 2,4,5-TGC6156640 B-202134See footnote p. 115, see footnote O-3105-83. 67. 2,4,5-TP (Silvex)GC6156640 B-202134See footnote p. 115, see footnote O-3105-83. 68. TerbuthylazineGC619, 1656, 608.336See footnote p. 83, see footnote p. S68. GC/MS13See footnote O-2002-01. 69. ToxapheneGC505, 508, 617, 1656, 608.36630 B-2021 & C-2021D3086-90, D5812-96(02)384See footnote p. 7, see footnote , see footnote O-3105-83. GC/MS525.1, 525.2, 625.16410 B-2020. 70. TrifluralinGC508, 617, 627, 1656, 608.36630 B-202139See footnote p. 7, see footnote O-3106-93. GC/MS525.2, 625.111See footnote O-1126-95. Table ID notes: 1 Pesticides are listed in this table by common name for the convenience of the reader. Additional pesticides may be found under table IC of this section, where entries are listed by chemical name. 2 The standardized test procedure to be used to determine the method detection limit (MDL) for these test procedures is given at appendix B to this part, Definition and Procedure for the Determination of the Method Detection Limit. 3 Methods for Benzidine, Chlorinated Organic Compounds, Pentachlorophenol and Pesticides in Water and Wastewater. September 1978. U.S. EPA. This EPA publication includes thin-layer chromatography (TLC) methods. 4 Methods for the Determination of Organic Substances in Water and Fluvial Sediments, Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 5, Chapter A3. 1987. USGS. 5 The method may be extended to include α-BHC, γ-BHC, endosulfan I, endosulfan II, and endrin. However, when they are known to exist, Method 608 is the preferred method. 6Standard Methods for the Examination of Water and Wastewater. Selected Analytical Methods Approved and Cited by the United States Environmental Protection Agency, Supplement to the 15th Edition of 1981. American Public Health Association (APHA). 7 Each analyst must make an initial, one-time, demonstration of their ability to generate acceptable precision and accuracy with Methods 608.3 and 625.1 in accordance with procedures given in Section 8.2 of each of these methods. Additionally, each laboratory, on an on-going basis, must spike and analyze 10% of all samples analyzed with Method 608.3 or 5% of all samples analyzed with Method 625.1 to monitor and evaluate laboratory data quality in accordance with Sections 8.3 and 8.4 of these methods. When the recovery of any parameter falls outside the warning limits, the analytical results for that parameter in the unspiked sample are suspect. The results should be reported, but cannot be used to demonstrate regulatory compliance. These quality control requirements also apply to the Standard Methods, ASTM Methods, and other methods cited. 8TM Organochlorine Pesticides and PCBs in Wastewater Using Empore Disk. Revised October 28, 1994. 3M Corporation. 9 Method O-3106-93 is in Open File Report 94-37, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Triazine and Other Nitrogen-Containing Compounds by Gas Chromatography with Nitrogen Phosphorus Detectors. 1994. USGS. 10 EPA Methods 608.1, 608.2, 614, 614.1, 615, 617, 619, 622, 622.1, 627, and 632 are found in Methods for the Determination of Nonconventional Pesticides in Municipal and Industrial Wastewater, EPA 821-R-92-002, April 1992, U.S. EPA. EPA Methods 505, 507, 508, 525.1, 531.1 and 553 are in Methods for the Determination of Nonconventional Pesticides in Municipal and Industrial Wastewater, Volume II, EPA 821-R-93-010B, 1993, U.S. EPA. EPA Method 525.2 is in Determination of Organic Compounds in Drinking Water by Liquid-Solid Extraction and Capillary Column Gas Chromatography/Mass Spectrometry, Revision 2.0, 1995, U.S. EPA. EPA methods 1656 and 1657 are in Methods for The Determination of Nonconventional Pesticides In Municipal and Industrial Wastewater, Volume I, EPA 821-R-93-010A, 1993, U.S. EPA. Methods 608.3 and 625.1 are available at: cwa-methods/approved-cwa-test-methods-organic-compounds. 11 Method O-1126-95 is in Open-File Report 95-181, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of pesticides in water by C-18 solid-phase extraction and capillary-column gas chromatography/mass spectrometry with selected-ion monitoring. 1995. USGS. 12 Method O-2060-01 is in Water-Resources Investigations Report 01-4134, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of Pesticides in Water by Graphitized Carbon-Based Solid-Phase Extraction and High-Performance Liquid Chromatography/Mass Spectrometry. 2001. USGS. 13 Method O-2002-01 is in Water-Resources Investigations Report 01-4098, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of moderate-use pesticides in water by C-18 solid-phase extraction and capillary-column gas chromatography/mass spectrometry. 2001. USGS. 14 Method O-1121-91 is in Open-File Report 91-519, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory—Determination of organonitrogen herbicides in water by solid-phase extraction and capillary-column gas chromatography/mass spectrometry with selected-ion monitoring. 1992. USGS. 15www.standardmethods.org Please refer to the following applicable Quality Control Section: Part 6000 Methods, Individual Organic Compounds 6020 (2019). These Quality Control Standards are available for download at at no charge.

Table IE—List of Approved Radiologic Test Test ProceduresParameter and unitsMethodReference (method number or page) 1EPA Standard Methods 18th, 19th, 20th Ed.Standard Methods OnlineASTM2USGS 1. Alpha-Total, pCi per literProportional or scintillation counter9007110 B7110 B-00D1943-90, 963pp. 75 and 78 2. Alpha-Counting error, pCi per literProportional or scintillation counterAppendix B7110 B7110 B-00D1943-90, 96p. 79 3. Beta-Total, pCi per literProportional counter9007110 B7110 B-00D1890-90, 963pp. 75 and 78 4. Beta-Counting error, pCiProportional counterAppendix B7110 B7110 B-00D1890-90, 96p. 79 5. (a) Radium Total pCi per liter(b) Ra, pCi per literProportional counter9037500-Ra B7500-Ra B-01D2460-90, 97 Scintillation counter903.17500-Ra C7500-Ra C-01D3454-91, 97p. 81 1 Prescribed Procedures for Measurement of Radioactivity in Drinking Water, EPA-600/4-80-032 (1980), U.S. Environmental Protection Agency, August 1980. 2 Fishman, M. J. and Brown, Eugene, “Selected Methods of the U.S. Geological Survey of Analysis of Wastewaters,” U.S. Geological Survey, Open-File Report 76-177 (1976). 3 The method found on p. 75 measures only the dissolved portion while the method on p. 78 measures only the suspended portion. Therefore, the two results must be added to obtain the “total.”

Table IF—List of Approved Methods for Pharmaceutical PollutantsPharmaceuticals pollutantsCAS registry No.Analytical method number Acetonitrile75-05-81666/1671/D3371/D3695/624.1 n-Amyl acetate628-63-71666/D3695 n-Amyl alcohol71-41-01666/D3695 Benzene71-43-2D4763/D3695/502.2/524.2/624.1 n-Butyl-acetate123-86-41666/D3695 tert-Butyl alcohol75-65-01666/624.1 Chlorobenzene108-90-7502.2/524.2/624.1 Chloroform67-66-3502.2/524.2/551/624.1 o-Dichlorobenzene95-50-11625C/502.2/524.2/624.1 1,2-Dichloroethane107-06-2D3695/502.2/524.2/624.1 Diethylamine109-89-71666/1671 Dimethyl sulfoxide67-68-51666/1671 Ethanol64-17-51666/1671/D3695/624.1 Ethyl acetate141-78-61666/D3695/624.1 n-Heptane142-82-51666/D3695 n-Hexane110-54-31666/D3695 Isobutyraldehyde78-84-21666/1667 Isopropanol67-63-01666/D3695 Isopropyl acetate108-21-41666/D3695 Isopropyl ether108-20-31666/D3695 Methanol67-56-11666/1671/D3695/624.1 Methyl Cellosolve® (2-Methoxy ethanol)109-86-41666/1671 Methylene chloride75-09-2502.2/524.2/624.1 Methyl formate107-31-31666 4-Methyl-2-pentanone (MIBK)108-10-11624C/1666/D3695/D4763/524.2/624.1 Phenol108-95-2D4763 n-Propanol71-23-81666/1671/D3695/624.1 2-Propanone (Acetone)67-64-1D3695/D4763/524.2/624.1 Tetrahydrofuran109-99-91666/524.2/624.1 Toluene108-88-3D3695/D4763/502.2/524.2/624.1 Triethlyamine121-44-81666/1671 Xylenes(Note 1)1624C/1666/624.1 Table IF note: 1mo,po 1624C: -xylene 108-38-3, -xylene, E-14095 (Not a CAS number; this is the number provided in the Environmental Monitoring Methods Index [EMMI] database.); 1666: m,p-xylene 136777-61-2, -xylene 95-47-6.

Table IG—Test Methods for Pesticide Active Ingredients[40 CFR part 455]EPA survey codePesticide nameCAS No.3EPA analytical method No.(s) 8Triadimefon43121-43-3507/633/525.1/525.2/1656/625.1. 12Dichlorvos62-73-71657/507/622/525.1/525.2/625.1. 162,4-D; 2,4-D Salts and Esters [2,4-Dichloro-phenoxyacetic acid]94-75-71658/515.1/615/515.2/555. 172,4-DB; 2,4-DB Salts and Esters [2,4-Dichlorophenoxybutyric acid]94-82-61658/515.1/615/515.2/555. 22Mevinphos7786-34-71657/507/622/525.1/525.2/625.1. 25Cyanazine21725-46-2629/507/608.3/625.1. 26Propachlor1918-16-71656/508/608.1/525.1/525.2/608.3/625.1. 27MCPA; MCPA Salts and Esters[2-Methyl-4-chlorophenoxyacetic acid]94-74-61658/615/555. 30Dichlorprop; Dichlorprop Salts and Esters [2-(2,4-Dichlorophenoxy) propionic acid]120-36-51658/515.1/615/515.2/555. 31MCPP; MCPP Salts and Esters [2-(2-Methyl-4-chlorophenoxy) propionic acid]93-65-21658/615/555. 35TCMTB [2-(Thiocyanomethylthio) benzo-thiazole]21564-17-0637 39Pronamide23950-58-5525.1/525.2/507/633.1/625.1. 41Propanil709-98-8632.1/1656/608.3. 45Metribuzin21087-64-9507/633/525.1/525.2/1656/608.3/625.1. 52Acephate30560-19-11656/1657/608.3. 53Acifluorfen50594-66-6515.1/515.2/555. 54Alachlor15972-60-8505/507/645/525.1/525.2/1656/608.3/625.1. 55Aldicarb116-06-3531.1. 58Ametryn834-12-8507/619/525.2/625.1. 60Atrazine1912-24-9505/507/619/525.1/525.2/1656/ 608.3/625.1. 62Benomyl17804-35-2631 68Bromacil; Bromacil Salts and Esters314-40-9507/633/525.1/525.2/1656/608.3/625.1. 69Bromoxynil1689-84-51625/1661/625.1. 69Bromoxynil Octanoate1689-99-21656/608.3. 70Butachlor23184-66-9507/645/525.1/525.2/1656/608.3/625.1. 73Captafol2425-06-11656/608.3/625.1. 75Carbaryl [Sevin]63-25-2531.1/632/553/625.1. 76Carbofuran1563-66-2531.1/632/625.1. 80Chloroneb2675-77-61656/508/608.1/525.1/525.2/608.3/625.1. 82Chlorothalonil1897-45-6508/608.2/525.1/525.2/1656/608.3/625.1. 84Stirofos961-11-51657/507/622/525.1/525.2/625.1. 86Chlorpyrifos2921-88-21657/508/622/625.1. 90Fenvalerate51630-58-11660 103Diazinon333-41-51657/507/614/622/525.2/625.1. 107Parathion methyl298-00-01657/614/622/625.1. 110DCPA [Dimethyl 2,3,5,6-tetrachloro-terephthalate]1861-32-122508/608.2/525.1/525.2/515.1 /515.2 /1656/608.3/625.1. 112Dinoseb88-85-71658/515.1/615/515.2/555/625.1. 113Dioxathion78-34-21657/614.1. 118Nabonate [Disodium cyanodithio-imidocarbonate]138-93-2630.1. 119Diuron330-54-1632/553. 123Endothall145-73-3548/548.1. 124Endrin72-20-81656/505/508/617/525.1/525.2/608.3/625.1. 125Ethalfluralin55283-68-61656/627/608.3 See footnote 1. 126Ethion563-12-21657/614/614.1/625.1. 127Ethoprop13194-48-41657/507/622/525.1/525.2/625.1. 132Fenarimol60168-88-9507/633.1/525.1/525.2/1656/608.3/625.1. 133Fenthion55-38-91657/622/625.1. 138Glyphosate [N-(Phosphonomethyl) glycine]1071-83-6547 140Heptachlor76-44-81656/505/508/617/525.1/525.2/608.3/625.1. 144Isopropalin33820-53-01656/627/608.3. 148Linuron330-55-2553/632. 150Malathion121-75-51657/614/625.1. 154Methamidophos10265-92-61657 156Methomyl16752-77-5531.1/632. 158Methoxychlor72-43-51656/505/508/608.2/617/525.1/525.2/608.3/625.1. 172Nabam142-59-6630/630.1. 173Naled300-76-51657/622/625.1. 175Norflurazon27314-13-2507/645/525.1/525.2/1656/608.3/625.1. 178Benfluralin1861-40-11656/627/608.3 See footnote 1. 182Fensulfothion115-90-21657/622/625.1. 183Disulfoton298-04-41657/507/614/622/525.2/625.1. 185Phosmet732-11-61657/622.1/625.1. 186Azinphos Methyl86-50-01657/614/622/625.1. 192Organo-tin pesticides12379-54-3Ind-01/200.7/200.9. 197Bolstar35400-43-21657/622. 203Parathion56-38-21657/614/625.1. 204Pendimethalin40487-42-11656 205Pentachloronitrobenzene82-68-81656/608.1/617/608.3/625.1. 206Pentachlorophenol87-86-51625/515.2/555/515.1/525.1/525.2/625.1. 208Permethrin52645-53-144608.2/508/525.1/525.2/1656/1660/608.3 /625.1 . 212Phorate298-02-21657/622/625.1. 218Busan 85 [Potassium dimethyldithiocarbamate]128-03-0630/630.1. 219Busan 40 [Potassium N-hydroxymethyl-N-methyldithiocarbamate]51026-28-9630/630.1. 220KN Methyl [Potassium N-methyl-dithiocarbamate]137-41-7630/630.1. 223Prometon1610-18-0507/619/525.2/625.1. 224Prometryn7287-19-6507/619/525.1/525.2/625.1. 226Propazine139-40-2507/619/525.1/525.2/1656/608.3/625.1. 230Pyrethrin I121-21-11660 232Pyrethrin II121-29-91660 236DEF [S,S,S-Tributyl phosphorotrithioate]78-48-81657 239Simazine122-34-9505/507/619/525.1/525.2/1656/608.3/625.1. 241Carbam-S [Sodium dimethyldithio-carbamate]128-04-1630/630.1. 243Vapam [Sodium methyldithiocarbamate]137-42-8630/630.1. 252Tebuthiuron34014-18-1507/525.1/525.2/625.1. 254Terbacil5902-51-2507/633/525.1/525.2/1656/608.3/625.1. 255Terbufos13071-79-91657/507/614.1/525.1/525.2/625.1. 256Terbuthylazine5915-41-3619/1656/608.3. 257Terbutryn886-50-0507/619/525.1/525.2/625.1. 259Dazomet533-74-4630/630.1/1659. 262Toxaphene8001-35-21656/505/508/617/525.1/525.2/608.3/625.1. 263Merphos [Tributyl phosphorotrithioate]150-50-51657/507/525.1/525.2/622/625.1. 2641Trifluralin 1582-09-81656/508/617/627/525.2/608.3/625.1. 268Ziram [Zinc dimethyldithiocarbamate]137-30-4630/630.1. Table IG notes: 1 Monitor and report as total Trifluralin. 2 Applicable to the analysis of DCPA degradates. 3https://www.epa.gov/cwa-methods/approved-cwa-test-methods-organic-compounds EPA Methods 608.1 through 645, 1645 through 1661, and Ind-01 are available in Methods for the Determination of Nonconventional Pesticides in Municipal and Industrial Wastewater, Volume I, EPA 821-R-93-010A, Revision I, August 1993, U.S. EPA. EPA Methods 200.9 and 505 through 555 are available in Methods for the Determination of Nonconventional Pesticides in Municipal and Industrial Wastewater, Volume II, EPA 821-R-93-010B, August 1993, U.S. EPA. The full text of Methods 608.3, 625.1, and 1625 are provided at appendix A of this part. The full text of Method 200.7 is provided at appendix C of this part. Methods 608.3 and 625.1 are available at . 4cistranscis-trans Permethrin is not listed within methods 608.3 and 625.1; however, -permethrin and -permethrin are listed. Permethrin can be calculated by adding the results of and -permethrin.

Table IH—List of Approved Microbiological Methods for Ambient WaterParameter and units1Method EPAStandard methodsAOAC, ASTM, USGSOther Bacteria 1. Coliform (fecal), number per 100 mLMost Probable Number (MPN), 5 tube, 3 dilution, or3p. 132 329221 E-2014, 9221 F-2014. 2Membrane filter (MF) , single step3p. 124 269222 D-2015 4B-0050-85. 2. Coliform (total), number per 100 mLMPN, 5 tube, 3 dilution, or3p. 114 9221 B-2014. 2MF , single step or3p. 108 279222 B-2015 4B-0025-85. 2MF , two step with enrichment3p. 111 279222 B-2015. E. coli,3. number per 100 mL5713MPN , multiple tube, or1012329221 B.3-2014/9221 F-2014. Multiple tube/multiple well, or119223 B-2016 9991.15 1115111415Colilert® , Colilert-18®. 2567MF , two step, or181103.2 179222 B-2015/9222 I-2015 , 9213 D-20078D5392-93. Single step19201603.1 , 1604 16TM2829m-ColiBlue24® , KwikCount EC. 4. Fecal streptococci, number per 100 mLMPN, 5 tube, 3 dilution, or3p. 139 9230 B-2013. 2MF , or3p. 136 309230 C-2013 4B-0055-85. Plate count3p. 143. 5. Enterococci, number per 100 mL57MPN , multiple tube/multiple well, or9230 D-20138D6503-99 1121Enterolert®. 2567MF two step, or221106.2 309230 C-2013 8D5259-92. Single step, or231600.1 309230 C-2013. Plate count3p. 143. Protozoa Cryptosporidium6. Filtration/IMS/FA242525311622 , 1623 , 1623.1. Giardia7. Filtration/IMS/FA2525311623 , 1623.1. Table 1H notes: 1 The method must be specified when results are reported. 2 A 0.45-µm membrane filter (MF) or other pore size certified by the manufacturer to fully retain organisms to be cultivated and to be free of extractables which could interfere with their growth. 3 Microbiological Methods for Monitoring the Environment, Water and Wastes. EPA/600/8-78/017. 1978. US EPA. 4 U.S. Geological Survey Techniques of Water-Resource Investigations, Book 5, Laboratory Analysis, Chapter A4, Methods for Collection and Analysis of Aquatic Biological and Microbiological Samples. 1989. USGS. 5 Tests must be conducted to provide organism enumeration (density). Select the appropriate configuration of tubes/filtrations and dilutions/volumes to account for the quality, character, consistency, and anticipated organism density of the water sample. 6 When the MF method has not been used previously to test waters with high turbidity, large numbers of noncoliform bacteria, or samples that may contain organisms stressed by chlorine, a parallel test should be conducted with a multiple-tube technique to demonstrate applicability and comparability of results. 7Standard Methods for the Examination of Water and Wastewater To assess the comparability of results obtained with individual methods, it is suggested that side-by-side tests be conducted across seasons of the year with the water samples routinely tested in accordance with the most current or EPA alternate test procedure (ATP) guidelines. 8 Annual Book of ASTM Standards—Water and Environmental Technology. Section 11.02. 2000, 1999, 1996. ASTM International. 9 Official Methods of Analysis of AOAC International, 16th Edition, Volume I, Chapter 17. 1995. AOAC International. 10 The multiple-tube fermentation test is used in 9221B.3-2014. Lactose broth may be used in lieu of lauryl tryptose broth (LTB), if at least 25 parallel tests are conducted between this broth and LTB using the water samples normally tested, and this comparison demonstrates that the false-positive rate and false-negative rate for total coliform using lactose broth is less than 10 percent. No requirement exists to run the completed phase on 10 percent of all total coliform-positive tubes on a seasonal basis. 11 These tests are collectively known as defined enzyme substrate tests. 12 After prior enrichment in a presumptive medium for total coliform using 9221B.3-2014, all presumptive tubes or bottles showing any amount of gas, growth or acidity within 48 h ± 3 h of incubation shall be submitted to 9221F-2014. Commercially available EC-MUG media or EC media supplemented in the laboratory with 50 µg/mL of MUG may be used. 13 Samples shall be enumerated by the multiple-tube or multiple-well procedure. Using multiple-tube procedures, employ an appropriate tube and dilution configuration of the sample as needed and report the Most Probable Number (MPN). Samples tested with Colilert® may be enumerated with the multiple-well procedures, Quanti-Tray® or Quanti-Tray®/2000, and the MPN calculated from the table provided by the manufacturer. 14E. coli Colilert-18® is an optimized formulation of the Colilert® for the determination of total coliforms and that provides results within 18 h of incubation at 35 °C, rather than the 24 h required for the Colilert® test and is recommended for marine water samples. 15®, Descriptions of the Colilert®, Colilert-18®, Quanti-Tray and Quanti-Tray®/2000 may be obtained from IDEXX Laboratories Inc. 16 A description of the mColiBlue24® test may be obtained from Hach Company. 17 Subject coliform positive samples determined by 9222B-2015 or other membrane filter procedure to 9222I-2015 using NA-MUG media. 18Escherichia coliE. coliEscherichia coli Method 1103.2: () in Water by Membrane Filtration Using membrane-Thermotolerant Agar (mTEC), EPA-821-R-23-009. September 2023. US EPA. 19Escherichia coliE. coliEscherichia coli Method 1603.1: () in Water by Membrane Filtration Using Modified membrane-Thermotolerant Agar (Modified mTEC), EPA-821-R-23-008. September 2023 . US EPA. 20Escherichia coliE. coli Method 1604: Total Coliforms and () in Water by Membrane Filtration by Using a Simultaneous Detection Technique (MI Medium), EPA 821-R-02-024. September 2002. US EPA. 21 A description of the Enterolert® test may be obtained from IDEXX Laboratories Inc. 22Enterococcus Method 1106.2: Enterococci in Water by Membrane Filtration Using membrane--Esculin Iron Agar (mE-EIA), EPA-821-R-23-007. September 2023. US EPA. 23Enterococcus Method 1600.1: Enterococci in Water by Membrane Filtration Using membrane- Indoxyl-β-D-Glucoside Agar (mEI), EPA-821-R-21-006. September 2023. US EPA. 24Cryptosporidium.Cryptosporidium Method 1622 uses a filtration, concentration, immunomagnetic separation of oocysts from captured material, immunofluorescence assay to determine concentrations, and confirmation through vital dye staining and differential interference contrast microscopy for the detection of Method 1622: in Water by Filtration/IMS/FA, EPA-821-R-05-001. December 2005. US EPA. 25CryptosporidiumGiardiaCryptosporidiumGiardiaCryptosporidiumGiardia Methods 1623 and 1623.1 use a filtration, concentration, immunomagnetic separation of oocysts and cysts from captured material, immunofluorescence assay to determine concentrations, and confirmation through vital dye staining and differential interference contrast microscopy for the simultaneous detection of and oocysts and cysts. Method 1623: and in Water by Filtration/IMS/FA. EPA-821-R-05-002. December 2005. US EPA. Method 1623.1: and in Water by Filtration/IMS/FA. EPA 816-R-12-001. January 2012. US EPA. 26 On a monthly basis, at least ten blue colonies from positive samples must be verified using Lauryl Tryptose Broth and EC broth, followed by count adjustment based on these results; and representative non-blue colonies should be verified using Lauryl Tryptose Broth. Where possible, verifications should be done from randomized sample sources. 27 On a monthly basis, at least ten sheen colonies from positive samples must be verified using Lauryl Tryptose Broth and brilliant green lactose bile broth, followed by count adjustment based on these results; and representative non-sheen colonies should be verified using Lauryl Tryptose Broth. Where possible, verifications should be done from randomized sample sources. 28TM A description of KwikCount EC may be obtained from Roth Bioscience, LLC. 29E. coli Approved for the analyses of in freshwater only. 30Standard Methods for the Examination of Water and Wastewater Verification of colonies by incubation of BHI agar at 10 ± 0.5 °C for 48 ± 3 h is optional. As per the Errata to the 23rd Edition of “Growth on a BHI agar plate incubated at 10 ± 0.5 °C for 48 ± 3 h is further verification that the colony belongs to the genus Enterococcus.” 31 Method 1623.1 includes updated acceptance criteria for IPR, OPR, and MS/MSD and clarifications and revisions based on the use of Method 1623 for years and technical support questions. 32E. coli 9221 F.2-2014 allows for simultaneous detection of and thermotolerant fecal coliforms by adding inverted vials to EC-MUG; the inverted vials collect gas produced by thermotolerant fecal coliforms.

Table II—Required Containers, Preservation Techniques, and Holding TimesParameter number/name1Container 2 3Preservation 4Maximum holding time Table IA—Bacterial Tests E. coli1-4. Coliform, total, fecal, and PA, G2235Cool, <10 °C, 0.008% Na S O 22 238 hours. 5. Fecal streptococciPA, G2235Cool, <10 °C, 0.008% Na S O 228 hours. 6. EnterococciPA, G2235Cool, <10 °C, 0.008% Na S O 228 hours. Salmonella7. PA, G2235Cool, <10 °C, 0.008% Na S O 228 hours. Table IA—Aquatic Toxicity Tests 8-11. Toxicity, acute and chronicP, FP, G16Cool, ≤6 °C 36 hours. Table IB—Inorganic Tests 1. AcidityP, FP, G18Cool, ≤6 °C 14 days. 2. AlkalinityP, FP, G18Cool, ≤6 °C 14 days. 4. AmmoniaP, FP, G1824Cool, ≤6 °C , H SO to pH <228 days. 9. Biochemical oxygen demandP, FP, G18Cool, ≤6 °C 48 hours. 10. BoronP, FP, or Quartz3HNO to pH <26 months. 11. BromideP, FP, GNone required28 days. 14. Biochemical oxygen demand, carbonaceousP, FP G18Cool, ≤6 °C 48 hours. 15. Chemical oxygen demandP, FP, G1824Cool, ≤6 °C , H SO to pH <228 days. 16. ChlorideP, FP, GNone required28 days. 17. Chlorine, total residualP, GNone requiredAnalyze within 15 minutes. 21. ColorP, FP, G18Cool, ≤6 °C 48 hours. 23-24. Cyanide, total or available (or CATC) and freeP, FP, G185 6Cool, ≤6 °C , NaOH to pH >10 , reducing agent if oxidizer present14 days. 25. FluoridePNone required28 days. 27. HardnessP, FP, G324HNO or H SO to pH <26 months. 28. Hydrogen ion (pH)P, FP, GNone requiredAnalyze within 15 minutes. 31, 43. Kjeldahl and organic NP, FP, G1824Cool, ≤6 °C , H SO to pH <228 days. Table IB—Metals7 18. Chromium VIP, FP, G1820Cool, ≤6 °C , pH = 9.3-9.7 28 days. 35. Mercury (CVAA)P, FP, G3HNO to pH <228 days. 35. Mercury (CVAFS)17FP, G; and FP-lined cap 175 mL/L 12N HCl or 5 mL/L BrCl 1790 days. 3, 5-8, 12, 13, 19, 20, 22, 26, 29, 30, 32-34, 36, 37, 45, 47, 51, 52, 58-60, 62, 63, 70-72, 74, 75. Metals, except boron, chromium VI, and mercuryP, FP, G319HNO to pH <2, or at least 24 hours prior to analysis 6 months. 38. NitrateP, FP, G18Cool, ≤6 °C 48 hours. 39. Nitrate-nitriteP, FP, G1824Cool, ≤6 °C , H SO to pH <228 days. 40. NitriteP, FP, G18Cool, ≤6 °C 48 hours. 41. Oil and greaseG1824Cool to ≤6 °C , HCl or H SO to pH <228 days. 42. Organic CarbonP, FP, G182434Cool to ≤6 °C , HCl, H SO, or H PO to pH <228 days. 44. OrthophosphateP, FP, G18 24Cool, to ≤6 °C Filter within 15 minutes; Analyze within 48 hours. 46. Oxygen, Dissolved ProbeG, Bottle and topNone requiredAnalyze within 15 minutes. 47. WinklerG, Bottle and topFix on site and store in dark8 hours. 48. PhenolsG1824Cool, ≤6 °C , H SO to pH <228 days. 49. Phosphorus (elemental)G18Cool, ≤6 °C 48 hours. 50. Phosphorus, totalP, FP, G1824Cool, ≤6 °C , H SO to pH <228 days. 53. Residue, totalP, FP, G18Cool, ≤6 °C 7 days. 54. Residue, Filterable (TDS)P, FP, G18Cool, ≤6 °C 7 days. 55. Residue, Nonfilterable (TSS)P, FP, G18Cool, ≤6 °C 7 days. 56. Residue, SettleableP, FP, G18Cool, ≤6 °C 48 hours. 57. Residue, VolatileP, FP, G18Cool, ≤6 °C 7 days. 61. SilicaP or Quartz18Cool, ≤6 °C 28 days. 64. Specific conductanceP, FP, G18Cool, ≤6 °C 28 days. 65. SulfateP, FP, G18Cool, ≤6 °C 28 days. 66. SulfideP, FP, G18Cool, ≤6 °C , add zinc acetate plus sodium hydroxide to pH >97 days. 67. SulfiteP, FP, GNone requiredAnalyze within 15 minutes. 68. SurfactantsP, FP, G18Cool, ≤6 °C 48 hours. 69. TemperatureP, FP, GNone requiredAnalyze within 15 minutes. 73. TurbidityP, FP, G18Cool, ≤6 °C 48 hours. Table IC—Organic Tests8 13, 18-20, 22, 24, 25, 27, 28, 34-37, 39-43, 45-47, 56, 76, 104, 105, 108-111, 113. Purgeable HalocarbonsG, FP-lined septum1859223Cool, ≤6 °C , 0.008% Na S O , HCl to pH 2 914 days. 26. 2-Chloroethylvinyl etherG, FP-lined septum185223Cool, ≤6 °C , 0.008% Na S O 14 days. 6, 57, 106. Purgeable aromatic hydrocarbonsG, FP-lined septum1859223Cool, ≤6 °C , 0.008% Na S O , HCl to pH 2 914 days. 3, 4. Acrolein and acrylonitrileG, FP-lined septum1810223Cool, ≤6 °C , 0.008% Na S O, pH to 4-5 1014 days. 1123, 30, 44, 49, 53, 77, 80, 81, 98, 100, 112. Phenols G, FP-lined cap18223Cool, ≤6 °C , 0.008% Na S O7 days until extraction, 40 days after extraction. 11 127, 38. Benzidines G, FP-lined cap185223Cool, ≤6 °C , 0.008% Na S O 137 days until extraction. 1114, 17, 48, 50-52. Phthalate esters G, FP-lined cap18Cool, ≤6 °C 7 days until extraction, 40 days after extraction. 11 1482-84. Nitrosamines G, FP-lined cap185223Cool, ≤6 °C , store in dark, 0.008% Na S O 7 days until extraction, 40 days after extraction. 1188-94. PCBs G, FP-lined cap18Cool, ≤6 °C 1 year until extraction, 1 year after extraction. 1154, 55, 75, 79. Nitroaromatics and isophorone G, FP-lined cap185223Cool, ≤6 °C , store in dark, 0.008% Na S O 7 days until extraction, 40 days after extraction. 111, 2, 5, 8-12, 32, 33, 58, 59, 74, 78, 99, 101. Polynuclear aromatic hydrocarbons G, FP-lined cap185223Cool, ≤6 °C , store in dark, 0.008% Na S O 7 days until extraction, 40 days after extraction. 1115, 16, 21, 31, 87. Haloethers G, FP-lined cap185223Cool, ≤6 °C , 0.008% Na S O 7 days until extraction, 40 days after extraction. 1129, 35-37, 63-65, 73, 107. Chlorinated hydrocarbons G, FP-lined cap18Cool, ≤6 °C 7 days until extraction, 40 days after extraction. 1160-62, 66-72, 85, 86, 95-97, 102, 103. CDDs/CDFs GSee footnote 11See footnote 11. Aqueous Samples: Field and Lab PreservationG185223Cool, ≤6 °C , 0.008% Na S O , pH <91 year. Solids and Mixed-Phase Samples: Field PreservationG18Cool, ≤6 °C 7 days. Tissue Samples: Field PreservationG18Cool, ≤6 °C 24 hours. Solids, Mixed-Phase, and Tissue Samples: Lab PreservationGFreeze, ≤−10 °C1 year. 114-118. Alkylated phenolsG24Cool, <6 °C, H SO to pH <228 days until extraction, 40 days after extraction. 119. Adsorbable Organic Halides (AOX)G2233Cool, <6 °C, 0.008% Na S O, HNO to pH <2at leastHold 3 days, but not more than 6 months. 120. Chlorinated PhenolicsG, FP-lined cap22324Cool, <6 °C, 0.008% Na S O, H SO to pH <230 days until acetylation, 30 days after acetylation. Table ID—Pesticides Tests 111-70. Pesticides G, FP-lined cap1815Cool, ≤6 °C , pH 5-9 7 days until extraction, 40 days after extraction. Table IE—Radiological Tests 1-5. Alpha, beta, and radiumP, FP, G3HNO to pH <26 months. Table IH—Bacterial Tests 1, 2. Coliform, total, fecalPA, G2235Cool, <10 °C, 0.008% Na S O 228 hours. E. coli3PA, G2235Cool, <10 °C, 0.008% Na S O 228 hours. 4. Fecal streptococciPA, G2235Cool, <10 °C, 0.008% Na S O 228 hours. 5. EnterococciPA, G2235Cool, <10 °C, 0.008% Na S O 228 hours. Table IH—Protozoan Tests Cryptosporidium6. LDPE; field filtration1-10 °C2196 hours. Giardia7. LDPE; field filtration1-10 °C2196 hours. 1 ”P” is for polyethylene; “FP” is fluoropolymer (polytetrafluoroethylene [PTFE]; Teflon®), or other fluoropolymer, unless stated otherwise in this Table II; “G” is glass; “PA” is any plastic that is made of a sterilizable material (polypropylene or other autoclavable plastic); “LDPE” is low density polyethylene. 2 Except where noted in this Table II and the method for the parameter, preserve each grab sample within 15 minutes of collection. For a composite sample collected with an automated sample (e.g., using a 24-hour composite sample; see 40 CFR 122.21(g)(7)(i) or 40 CFR part 403, appendix E), refrigerate the sample at ≤6 °C during collection unless specified otherwise in this Table II or in the method(s). For a composite sample to be split into separate aliquots for preservation and/or analysis, maintain the sample at ≤6 °C, unless specified otherwise in this Table II or in the method(s), until collection, splitting, and preservation is completed. Add the preservative to the sample container prior to sample collection when the preservative will not compromise the integrity of a grab sample, a composite sample, or aliquot split from a composite sample within 15 minutes of collection. If a composite measurement is required but a composite sample would compromise sample integrity, individual grab samples must be collected at prescribed time intervals (e.g., 4 samples over the course of a day, at 6-hour intervals). Grab samples must be analyzed separately and the concentrations averaged. Alternatively, grab samples may be collected in the field and composited in the laboratory if the compositing procedure produces results equivalent to results produced by arithmetic averaging of results of analysis of individual grab samples. For examples of laboratory compositing procedures, see EPA Method 1664 Rev. A (oil and grease) and the procedures at 40 CFR 141.24(f)(14)(iv) and (v) (volatile organics). 3324 When any sample is to be shipped by common carrier or sent via the U.S. Postal Service, it must comply with the Department of Transportation Hazardous Materials Regulations (49 CFR part 172). The person offering such material for transportation is responsible for ensuring such compliance. For the preservation requirement of Table II, the Office of Hazardous Materials, Materials Transportation Bureau, Department of Transportation has determined that the Hazardous Materials Regulations do not apply to the following materials: Hydrochloric acid (HCl) in water solutions at concentrations of 0.04% by weight or less (pH about 1.96 or greater; Nitric acid (HNO) in water solutions at concentrations of 0.15% by weight or less (pH about 1.62 or greater); Sulfuric acid (H SO) in water solutions at concentrations of 0.35% by weight or less (pH about 1.15 or greater); and Sodium hydroxide (NaOH) in water solutions at concentrations of 0.080% by weight or less (pH about 12.30 or less). 4 Samples should be analyzed as soon as possible after collection. The times listed are the maximum times that samples may be held before the start of analysis and still be considered valid. Samples may be held for longer periods only if the permittee or monitoring laboratory have data on file to show that, for the specific types of samples under study, the analytes are stable for the longer time, and has received a variance from the Regional ATP Coordinator under § 136.3(e). For a grab sample, the holding time begins at the time of collection. For a composite sample collected with an automated sampler (e.g., using a 24-hour composite sampler; see 40 CFR 122.21(g)(7)(i) or 40 CFR part 403, appendix E), the holding time begins at the time of the end of collection of the composite sample. For a set of grab samples composited in the field or laboratory, the holding time begins at the time of collection of the last grab sample in the set. Some samples may not be stable for the maximum time period given in the table. A permittee or monitoring laboratory is obligated to hold the sample for a shorter time if it knows that a shorter time is necessary to maintain sample stability. See § 136.3(e) for details. The date and time of collection of an individual grab sample is the date and time at which the sample is collected. For a set of grab samples to be composited, and that are all collected on the same calendar date, the date of collection is the date on which the samples are collected. For a set of grab samples to be composited, and that are collected across two calendar dates, the date of collection is the dates of the two days; e.g., November 14-15. For a composite sample collected automatically on a given date, the date of collection is the date on which the sample is collected. For a composite sample collected automatically, and that is collected across two calendar dates, the date of collection is the dates of the two days; e.g., November 14-15. For static-renewal toxicity tests, each grab or composite sample may also be used to prepare test solutions for renewal at 24 h, 48 h, and/or 72 h after first use, if stored at 0-6 °C, with minimum head space. 5Standard Methods for the Examination of Water and Wastewater ASTM D7365-09a (15) specifies treatment options for samples containing oxidants (e.g., chlorine) for cyanide analyses. Also, Section 9060A of (23rd edition) addresses dechlorination procedures for microbiological analyses. 6 Sampling, preservation and mitigating interferences in water samples for analysis of cyanide are described in ASTM D7365-09a (15). There may be interferences that are not mitigated by the analytical test methods or D7365-09a (15). Any technique for removal or suppression of interference may be employed, provided the laboratory demonstrates that it more accurately measures cyanide through quality control measures described in the analytical test method. Any removal or suppression technique not described in D7365-09a (15) or the analytical test method must be documented along with supporting data. 7 For dissolved metals, filter grab samples within 15 minutes of collection and before adding preservatives. For a composite sample collected with an automated sampler (e.g., using a 24-hour composite sampler; see 40 CFR 122.21(g)(7)(i) or 40 CFR part 403, appendix E), filter the sample within 15 minutes after completion of collection and before adding preservatives. If it is known or suspected that dissolved sample integrity will be compromised during collection of a composite sample collected automatically over time (e.g., by interchange of a metal between dissolved and suspended forms), collect and filter grab samples to be composited (footnote 2) in place of a composite sample collected automatically. 8 Guidance applies to samples to be analyzed by GC, LC, or GC/MS for specific compounds. 9 If the sample is not adjusted to pH 2, then the sample must be analyzed within seven days of sampling. 10 The pH adjustment is not required if acrolein will not be measured. Samples for acrolein receiving no pH adjustment must be analyzed within 3 days of sampling. 11i.e., When the extractable analytes of concern fall within a single chemical category, the specified preservative and maximum holding times should be observed for optimum safeguard of sample integrity ( use all necessary preservatives and hold for the shortest time listed). When the analytes of concern fall within two or more chemical categories, the sample may be preserved by cooling to ≤6 °C, reducing residual chlorine with 0.008% sodium thiosulfate, storing in the dark, and adjusting the pH to 6-9; samples preserved in this manner may be held for seven days before extraction and for forty days after extraction. Exceptions to this optional preservation and holding time procedure are noted in footnote 5 (regarding the requirement for thiosulfate reduction), and footnotes 12, 13 (regarding the analysis of benzidine). 12 If 1,2-diphenylhydrazine is likely to be present, adjust the pH of the sample to 4.0 ± 0.2 to prevent rearrangement to benzidine. 13 Extracts may be stored up to 30 days at <0 °C. 14223 For the analysis of diphenylnitrosamine, add 0.008% Na S O and adjust pH to 7-10 with NaOH within 24 hours of sampling. 15223 The pH adjustment may be performed upon receipt at the laboratory and may be omitted if the samples are extracted within 72 hours of collection. For the analysis of aldrin, add 0.008% Na S O. 16 Place sufficient ice with the samples in the shipping container to ensure that ice is still present when the samples arrive at the laboratory. However, even if ice is present when the samples arrive, immediately measure the temperature of the samples and confirm that the preservation temperature maximum has not been exceeded. In the isolated cases where it can be documented that this holding temperature cannot be met, the permittee can be given the option of on-site testing or can request a variance. The request for a variance should include supportive data which show that the toxicity of the effluent samples is not reduced because of the increased holding temperature. Aqueous samples must not be frozen. Hand-delivered samples used on the day of collection do not need to be cooled to 0 to 6 °C prior to test initiation. 17 Samples collected for the determination of trace level mercury (<100 ng/L) using EPA Method 1631 must be collected in tightly-capped fluoropolymer or glass bottles and preserved with BrCl or HCl solution within 48 hours of sample collection. The time to preservation may be extended to 28 days if a sample is oxidized in the sample bottle. A sample collected for dissolved trace level mercury should be filtered in the laboratory within 24 hours of the time of collection. However, if circumstances preclude overnight shipment, the sample should be filtered in a designated clean area in the field in accordance with procedures given in Method 1669. If sample integrity will not be maintained by shipment to and filtration in the laboratory, the sample must be filtered in a designated clean area in the field within the time period necessary to maintain sample integrity. A sample that has been collected for determination of total or dissolved trace level mercury must be analyzed within 90 days of sample collection. 18 Aqueous samples must be preserved at ≤6 °C, and should not be frozen unless data demonstrating that sample freezing does not adversely impact sample integrity is maintained on file and accepted as valid by the regulatory authority. Also, for purposes of NPDES monitoring, the specification of “≤ °C” is used in place of the “4 °C” and “<4 °C” sample temperature requirements listed in some methods. It is not necessary to measure the sample temperature to three significant figures (1/100th of 1 degree); rather, three significant figures are specified so that rounding down to 6 °C may not be used to meet the ≤6 °C requirement. The preservation temperature does not apply to samples that are analyzed immediately (less than 15 minutes). 19 An aqueous sample may be collected and shipped without acid preservation. However, acid must be added at least 24 hours before analysis to dissolve any metals that adsorb to the container walls. If the sample must be analyzed within 24 hours of collection, add the acid immediately (see footnote 2). Soil and sediment samples do not need to be preserved with acid. The allowances in this footnote supersede the preservation and holding time requirements in the approved metals methods. 20 To achieve the 28-day holding time, use the ammonium sulfate buffer solution specified in EPA Method 218.6. The allowance in this footnote supersedes preservation and holding time requirements in the approved hexavalent chromium methods, unless this supersession would compromise the measurement, in which case requirements in the method must be followed. 21 Holding time is calculated from time of sample collection to elution for samples shipped to the laboratory in bulk and calculated from the time of sample filtration to elution for samples filtered in the field. 22 Sample analysis should begin as soon as possible after receipt; sample incubation must be started no later than 8 hours from time of collection. 23 For fecal coliform samples for sewage sludge (biosolids) only, the holding time is extended to 24 hours for the following sample types using either EPA Method 1680 (LTB-EC) or 1681 (A-1): Class A composted, Class B aerobically digested, and Class B anaerobically digested. 24i.e.,i.e., The immediate filtration requirement in orthophosphate measurement is to assess the dissolved or bio-available form of orthophosphorus ( that which passes through a 0.45-micron filter), hence the requirement to filter the sample immediately upon collection ( within 15 minutes of collection).

[38 FR 28758, Oct. 16, 1973]

Editorial Note:Federal Registerwww.govinfo.gov.For citations affecting § 136.3, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at

§ 136.3 Identification of test procedures.

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&#xA7; 136.3 Identification of test procedures.

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§ 136.3 Identification of test procedures.