Document ID: EPA-HQ-OW-2013-0300-0067
Agency: epa
Document Type: Rule
Title: Expedited Approval of Alternative Test Procedures for Analysis and Sampling of Contaminants
Posted Date: 2013-06-21T04:00Z

[Federal Register Volume 78, Number 120 (Friday, June 21, 2013)]
[Rules and Regulations]
[Pages 37463-37468]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: C1-2013-12729]

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

ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 141

[EPA-HQ-OW-2013-0300; FRL-9818-2]

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

Correction

    In rule document 2013-12729, appearing on pages 32558-32574 in the 
issue of Friday, May 31, 2013, make the following correction:

PART 141--[CORRECTED]

    Beginning on page 32570, with the table entitled ``ALTERNATIVE 
TESTING METHODS FOR CONTAMINANTS LISTED AT 40 CFR 141.25(A)'', the 
tables are corrected to read as set forth below:

                     Alternative Testing Methods for Contaminants Listed at 40 CFR 141.25(a)
----------------------------------------------------------------------------------------------------------------
                                                          SM 21st Edition    SM 22nd  Edition
          Contaminant                  Methodology              \1\                \28\             ASTM \4\
----------------------------------------------------------------------------------------------------------------
Naturally Occurring:
Gross alpha and beta...........  Evaporation...........  7110 B...........  7110 B...........  .................
Gross alpha....................  Coprecipitation.......  7110 C...........  7110 C...........  .................
Radium 226.....................  Radon emanation.......  7500-Ra C........  7500-Ra C........  D3454-05
                                 Radiochemical.........  7500-Ra B........  7500-Ra B........  D2460-07
Radium 228.....................  Radiochemical.........  7500-Ra D........  7500-Ra D........  .................
Uranium........................  Radiochemical.........  7500-U B.........  7500-U B.........  .................
                                 ICP-MS................  3125.............  .................  D5673-05, 10
                                 Alpha spectrometry....  7500-U C.........  7500-U C.........  D3972-09
                                 Laser Phosphorimetry..  .................  .................  D5174-07
                                 Alpha Liquid            .................  .................  D6239-09
                                  Scintillation
                                  Spectrometry.
Man-Made:
Radioactive Cesium.............  Radiochemical.........  7500-Cs B........  7500-Cs B........  .................
                                 Gamma Ray Spectrometry  7120.............  7120.............  D3649-06
Radioactive Iodine.............  Radiochemical.........  7500-I B.........  7500-I B.........  D3649-06
                                                         7500-I C.........  7500-I C.........  .................
                                                         7500-I D.........  7500-I D.........  .................
                                 Gamma Ray Spectrometry  7120.............  7120.............  D4785-08
Radioactive Strontium 89, 90...  Radiochemical.........  7500-Sr B........  7500-Sr B........  .................
Tritium........................  Liquid Scintillation..  7500-\3\H B......  7500-\3\H B......  D4107-08
Gamma Emitters.................  Gamma Ray Spectrometry  7120.............  7120.............  D3649-06
                                                         7500-Cs B........  7500-Cs B........  D4785-08
                                                         7500-I B.........  7500-I B.........  .................
----------------------------------------------------------------------------------------------------------------

                   Alternative Testing Methods for Contaminants Listed at 40 CFR 141.74(a)(1)
----------------------------------------------------------------------------------------------------------------
                                                          SM 21st Edition    SM 22nd  Edition
            Organism                   Methodology              \1\                \28\              Other
----------------------------------------------------------------------------------------------------------------
Total Coliform.................  Total Coliform          9221 A, B, C.....  9221 A, B, C.....  .................
                                  Fermentation
                                  Technique.
                                 Total Coliform          9222 A, B, C.....
                                  Membrane Filter
                                  Technique.
                                 ONPG-MUG Test.........  9223.............  9223 B...........  .................
Fecal Coliforms................  Fecal Coliform          9221 E...........  9221 E...........  .................
                                  Procedure.
                                 Fecal Coliform Filter   9222 D...........  9222 D...........  .................
                                  Procedure.
Heterotrophic bacteria.........  Pour Plate Method.....  9215 B...........  9215 B...........  .................
Turbidity......................  Nephelometric Method..  2130 B...........  2130 B...........  .................

[[Page 37464]]

 
                                 Laser Nephelometry (on- .................  .................  Mitchell M5271
                                  line).                                                        \10\
                                 LED Nephelometry (on-   .................  .................  Mitchell M5331
                                  line).                                                        \11\
                                 LED Nephelometry (on-   .................  .................  AMI Turbiwell
                                  line).                                                        \15\
                                 LED Nephelometry        .................  .................  Orion AQ4500 \12\
                                  (portable).
----------------------------------------------------------------------------------------------------------------

                                  Alternative Testing Methods for Disinfectant Residuals Listed at 40 CFR 141.74(a)(2)
--------------------------------------------------------------------------------------------------------------------------------------------------------
             Residual                    Methodology       SM 21st  Edition \1\   SM 22nd Edition \28\         ASTM \4\                  Other
--------------------------------------------------------------------------------------------------------------------------------------------------------
Free Chlorine.....................  Amperometric          4500-Cl D............  4500-Cl D............  D 1253-08............
                                     Titration.
                                    DPD Ferrous           4500-Cl F............  4500-Cl F............
                                     Titrimetric.
                                    DPD Colorimetric....  4500-Cl G............  4500-Cl G............
                                    Syringaldazine        4500-Cl H............  4500-Cl H............
                                     (FACTS).
                                    On-line Chlorine      .....................  .....................  .....................  EPA 334.0 \16\
                                     Analyzer.
                                    Amperometric Sensor.  .....................  .....................  .....................  ChloroSense \17\
Total Chlorine....................  Amperometric          4500-Cl D............  4500-Cl D............  D 1253-08............
                                     Titration.
                                    Amperometric          4500-Cl E............  4500-Cl E............
                                     Titration (Low
                                     level measurement).
                                    DPD Ferrous           4500-Cl F............  4500-Cl F............
                                     Titrimetric.
                                    DPD Colorimetric....  4500-Cl G............  4500-Cl G............
                                    Iodometric Electrode  4500-Cl I............  4500-Cl I............
                                    On-line Chlorine      .....................  .....................  .....................  EPA 334.0 \16\
                                     Analyzer.
                                    Amperometric Sensor.  .....................  .....................  .....................  ChloroSense \17\
Chlorine Dioxide..................  Amperometric          4500-ClO2 C..........  4500-ClO2 C..........
                                     Titration.
                                    Amperometric          4500-ClO2 E..........  4500-ClO2 E..........
                                     Titration.
Ozone.............................  Indigo Method.......  4500-O3 B............  4500-O3 B............
--------------------------------------------------------------------------------------------------------------------------------------------------------

                                       Alternative Testing Methods for Contaminants Listed at 40 CFR 141.131(b)(1)
--------------------------------------------------------------------------------------------------------------------------------------------------------
            Contaminant                  Methodology            EPA method              ASTM \4\         SM 21st  Edition \1\    SM 22nd  Edition \28\
--------------------------------------------------------------------------------------------------------------------------------------------------------
TTHM..............................  P&T/GC/MS...........  524.3 \9\,
                                                          524.4 \29\...........
HAA5..............................  LLE (diazomethane)/   .....................  .....................  6251 B...............  6251 B.
                                     GC/ECD.
                                    Ion Chromatography    557 \14\.............
                                     Electrospray
                                     Ionization Tandem
                                     Mass Spectrometry
                                     (IC-ESI-MS/MS).
Bromate...........................  Two-Dimensional Ion   302.0 \18\...........
                                     Chromatography (IC).
                                    Ion Chromatography    557 \14\.............
                                     Electrospray
                                     Ionization Tandem
                                     Mass Spectrometry
                                     (IC-ESI-MS/MS).
                                    Chemically            .....................  D 6581-08 A..........
                                     Suppressed Ion
                                     Chromatography.
                                    Electrolytically      .....................  D 6581-08 B..........
                                     Suppressed Ion
                                     Chromatography.
Chlorite..........................  Chemically            .....................  D 6581-08 A..........
                                     Suppressed Ion
                                     Chromatography.
                                    Electrolytically      .....................  D 6581-08 B..........
                                     Suppressed Ion
                                     Chromatography.
Chlorite--daily monitoring as       Amperometric          .....................  .....................  4500-ClO2 E..........  4500-ClO2 E.
 prescribed in 40 CFR                Titration.
 141.132(b)(2)(i)(A).
--------------------------------------------------------------------------------------------------------------------------------------------------------

                                  Alternative Testing Methods for Disinfectant Residuals Listed at 40 CFR 141.131(c)(1)
--------------------------------------------------------------------------------------------------------------------------------------------------------
             Residual                    Methodology       SM 21st  Edition \1\  SM 22nd  Edition \28\         ASTM \4\                  Other
--------------------------------------------------------------------------------------------------------------------------------------------------------
Free Chlorine.....................  Amperometric          4500-Cl D............  4500-Cl D............  D 1253-08............
                                     Titration.
                                    DPD Ferrous           4500-Cl F............  4500-Cl F............
                                     Titrimetric.
                                    DPD Colorimetric....  4500-Cl G............  4500-Cl G............
                                    Syringaldazine        4500-Cl H............  4500-Cl H............
                                     (FACTS).
                                    Amperometric Sensor.  .....................  .....................  .....................  ChloroSense.\17\
                                    On-line Chlorine      .....................  .....................  .....................  EPA 334.0.\16\
                                     Analyzer.
Combined Chlorine.................  Amperometric          4500-Cl D............  4500-Cl D............  D 1253-08............
                                     Titration.
                                    DPD Ferrous           4500-Cl F............  4500-Cl F............
                                     Titrimetric.
                                    DPD Colorimetric....  4500-Cl G............  4500-Cl G............
Total Chlorine....................  Amperometric          4500-Cl D............  4500-Cl D............  D 1253-08............
                                     Titration.

[[Page 37465]]

 
                                    Low level             4500-Cl E............  4500-Cl E............
                                     Amperometric
                                     Titration.
                                    DPD Ferrous           4500-Cl F............  4500-Cl F............
                                     Titrimetric.
                                    DPD Colorimetric....  4500-Cl G............  4500-Cl G............
                                    Iodometric Electrode  4500-Cl I............  4500-Cl I............
                                    Amperometric Sensor.  .....................  .....................  .....................  ChloroSense.\17\
                                    On-line Chlorine      .....................  .....................  .....................  EPA 334.0.\16\
                                     Analyzer.
Chlorine Dioxide..................  Amperometric Method   4500-ClO2 E..........  4500-ClO2 E..........
                                     II.
--------------------------------------------------------------------------------------------------------------------------------------------------------

* * * * *

                     Alternative Testing Methods for Parameters Listed at 40 CFR 141.131(d)
----------------------------------------------------------------------------------------------------------------
                                                  SM 21st  Edition  SM 22nd  Edition
          Parameter               Methodology           \1\               \28\                    EPA
----------------------------------------------------------------------------------------------------------------
Total Organic Carbon (TOC)...  High Temperature  5310 B...........  5310 B..........  415.3, Rev 1.2 \19\
                                Combustion.
                               Persulfate-       5310 C...........  5310 C..........  415.3, Rev 1.2 \19\
                                Ultraviolet or
                                Heated
                                Persulfate
                                Oxidation.
                               Wet Oxidation...  5310 D...........  5310 D..........  415.3, Rev 1.2 \19\
Specific Ultraviolet           Calculation       .................  ................  415.3, Rev 1.2 \19\
 Absorbance (SUVA).             using DOC and
                                UV254 data.
    Dissolved Organic Carbon   High Temperature  5310 B...........  5310 B..........  415.3, Rev 1.2 \19\
     (DOC).                     Combustion.
                               Persulfate-       5310 C...........  5310 C..........  415.3, Rev 1.2 \19\
                                Ultraviolet or
                                Heated
                                Persulfate
                                Oxidation.
                               Wet Oxidation...  5310 D...........  5310 D..........  415.3, Rev 1.2 \19\
Ultraviolet absorption at 254  Spectrophotometr  5910 B...........  5910 B..........  415.3, Rev 1.2 \19\
 nm (UV254).                    y.
----------------------------------------------------------------------------------------------------------------

* * * * *

                                       Alternative Testing Methods for Contaminants Listed at 40 CFR 141.402(c)(2)
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                       SM 20th  Edition    SM 21st  Edition    SM 22nd  Edition
            Organism                 Methodology             \6\                  \1\                \28\            SM Online \3\           Other
--------------------------------------------------------------------------------------------------------------------------------------------------------
E. coli........................  Colilert[supreg]..  ...................  9223 B............  9223 B............  9223 B-97.........
                                 Colisure[supreg]..  ...................  9223 B............  9223 B............  9223 B-97.........
                                 Colilert-18.......  9223 B.............  9223 B............  9223 B............  9223 B-97.........
                                 Readycult[supreg].  ...................  ..................  ..................  ..................  Ready
                                                                                                                                      cult[supreg] \20\
                                 Colitag...........  ...................  ..................  ..................  ..................  Modified ColitagTM
                                                                                                                                       \13\
                                 Chromocult[supreg]  ...................  ..................  ..................  ..................  Chromo
                                                                                                                                      cult[supreg] \21\
                                 EC-MUG............  ...................  ..................  9221 F............
Enterococci....................  Multiple-Tube       ...................  ..................  ..................  9230 B-04.........
                                  Technique.
Coliphage......................  Two-Step            ...................  ..................  ..................  ..................  Fast Phage \30\
                                  Enrichment
                                  Presence-Absence
                                  Procedure.
--------------------------------------------------------------------------------------------------------------------------------------------------------

* * * * *

                   Alternative Testing Methods for Contaminants Listed at 40 CFR 141.852(a)(5)
----------------------------------------------------------------------------------------------------------------
             Organism                Methodology category         Method               SM 22nd Edition \28\
----------------------------------------------------------------------------------------------------------------
Total Coliforms...................  Lactose Fermentation   Standard Total        9221 B.1, B.2
                                     Methods.               Coliform
                                                            Fermentation
                                                            Technique.
                                    Enzyme Substrate       Colilert[supreg]....  9223 B
                                     Methods.
                                                           Colisure[supreg]....  9223 B
Escherichia coli..................  Escherichia coli       EC-MUG medium.......  9221 F.1
                                     Procedure (following
                                     Lactose Fermentation
                                     Methods).
                                    Enzyme Substrate       Colilert[supreg]....  9223 B
                                     Methods.
                                                           Colisure[supreg]....  9223 B
----------------------------------------------------------------------------------------------------------------

[[Page 37466]]

                                         Alternative Testing Methods for Contaminants Listed at 40 CFR 143.4(b)
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                         SM 21st  Edition    SM 22nd  Edition
         Contaminant              Methodology       EPA method           ASTM \4\               \1\                \28\               SM online \3\
--------------------------------------------------------------------------------------------------------------------------------------------------------
Aluminum.....................  Axially viewed    200.5, Revision
                                inductively       4.2\2\
                                coupled plasma-
                                atomic emission
                                spectrometry
                                (AVICP-AES).
                               Atomic            ................  ...................  3111 D............  3111 D............
                                Absorption;
                                Direct.
                               Atomic            ................  ...................  3113 B............  3113 B............  3113 B-04
                                Absorption;
                                Furnace.
                               Inductively       ................  ...................  3120 B............  3120 B............
                                Coupled Plasma.
Chloride.....................  Silver Nitrate    ................  D 512-04 B.........  4500-Cl- B........  4500-Cl- B........
                                Titration.
                               Ion               ................  ...................  4110 B............  4110 B............
                                Chromatography.
                               Potentiometric    ................  ...................  4500-Cl\-\ D......  4500-Cl\-\ D......
                                Titration.
Color........................  Visual            ................  ...................  2120 B............  2120 B............
                                Comparison.
Foaming Agents...............  Methylene Blue    ................  ...................  5540 C............  5540 C............
                                Active
                                Substances
                                (MBAS).
Iron.........................  Axially viewed    200.5, Revision
                                inductively       4.2 \2\
                                coupled plasma-
                                atomic emission
                                spectrometry
                                (AVICP-AES).
                               Atomic            ................  ...................  3111 B............  3111 B............
                                Absorption;
                                Direct.
                               Atomic            ................  ...................  3113 B............  3113 B............  3113 B-04
                                Absorption;
                                Furnace.
                               Inductively       ................  ...................  3120 B............  3120 B............
                                Coupled Plasma.
Manganese....................  Axially viewed    200.5, Revision
                                inductively       4.2 \2\
                                coupled plasma-
                                atomic emission
                                spectrometry
                                (AVICP-AES).
                               Atomic            ................  ...................  3111 B............  3111 B............
                                Absorption;
                                Direct.
                               Atomic            ................  ...................  3113 B............  3113 B............  3113 B-04
                                Absorption;
                                Furnace.
                               Inductively       ................  ...................  3120 B............  3120 B............
                                Coupled Plasma.
Odor.........................  Threshold Odor    ................  ...................  2150 B............  2150 B............
                                Test.
Silver.......................  Axially viewed    200.5, Revision
                                inductively       4.2 \2\
                                coupled plasma-
                                atomic emission
                                spectrometry
                                (AVICP-AES).
                               Atomic            ................  ...................  3111 B............  3111 B............
                                Absorption;
                                Direct.
                               Atomic            ................  ...................  3113 B............  3113 B............  3113 B-04
                                Absorption;
                                Furnace.
                               Inductively       ................  ...................  3120 B............  3120 B............
                                Coupled Plasma.
Sulfate......................  Ion               ................  ...................  4110 B............  4110 B............
                                Chromatography.
                               Gravimetric with  ................  ...................  4500-SO4 2- C.....  4500-SO4 2- C.....  4500-SO4 2- C-97
                                ignition of
                                residue.
                               Gravimetric with  ................  ...................  4500-SO4 2- D.....  4500-SO4 2- D.....  4500-SO4 2- D-97
                                drying of
                                residue.
                               Turbidimetric     ................  D 516-07, 11.......  4500-SO4 2- E.....  4500-SO4 2- E.....  4500-SO4 2- E-97
                                method.
                               Automated         ................  ...................  4500-SO4 2- F.....  4500-SO4 2- F.....  4500-SO4 2- F-97
                                methylthymol
                                blue method.
Total Dissolved Solids.......  Total Dissolved   ................  ...................  2540 C............  2540 C............
                                Solids Dried at
                                180 deg C.
Zinc.........................  Axially viewed    200.5, Revision
                                inductively       4.2 \2\
                                coupled plasma-
                                atomic emission
                                spectrometry
                                (AVICP-AES).
                               Atomic            ................  ...................  3111 B............  3111 B............
                                Absorption;
                                Direct
                                Aspiration.

[[Page 37467]]

 
                               Inductively       ................  ...................  3120 B............  3120 B............
                                Coupled Plasma.
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ Standard Methods for the Examination of Water and Wastewater, 21st edition (2005). Available from American Public Health Association, 800 I Street
  NW., Washington, DC 20001-3710.
\2\ EPA Method 200.5, Revision 4.2. ``Determination of Trace Elements in Drinking Water by Axially Viewed Inductively Coupled Plasma-Atomic Emission
  Spectrometry.'' 2003. EPA/600/R-06/115. (Available at http://www.epa.gov/nerlcwww/ordmeth.htm.)
\3\ Standard Methods Online are available at http://www.standardmethods.org. The year in which each method was approved by the Standard Methods
  Committee is designated by the last two digits in the method number. The methods listed are the only online versions that may be used.
\4\ Available from ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or http://astm.org. The methods listed are the only
  alternative versions that may be used.
 * * * * * * *
\6\ Standard Methods for the Examination of Water and Wastewater, 20th edition (1998). Available from American Public Health Association, 800 I Street
  NW., Washington, DC 20001-3710.
\7\ Method ME355.01, Revision 1.0. ``Determination of Cyanide in Drinking Water by GC/MS Headspace,'' May 26, 2009. Available at https://www.nemi.gov or
  from James Eaton, H & E Testing Laboratory, 221 State Street, Augusta, ME 04333. (207) 287-2727.
\8\ Systea Easy (1-Reagent). ``Systea Easy (1-Reagent) Nitrate Method,'' February 4, 2009. Available at https://www.nemi.gov or from Systea Scientific,
  LLC., 900 Jorie Blvd., Suite 35, Oak Brook, IL 60523.
\9\ EPA Method 524.3, Version 1.0. ``Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry,''
  June 2009. EPA 815-B-09-009. Available at http://water.epa.gov/drink/.
\10\ Mitchell Method M5271, Revision 1.1. ``Determination of Turbidity by Laser Nephelometry,'' March 5, 2009. Available at https://www.nemi.gov or from
  Leck Mitchell, Ph.D., PE, 656 Independence Valley Dr., Grand Junction, CO 81507.
\11\ Mitchell Method M5331, Revision 1.1. ``Determination of Turbidity by LED Nephelometry,'' March 5, 2009. Available at https://www.nemi.gov or from
  Leck Mitchell, Ph.D., PE, 656 Independence Valley Dr., Grand Junction, CO 81507.
\12\ Orion Method AQ4500, Revision 1.0. ``Determination of Turbidity by LED Nephelometry,'' May 8, 2009. Available at https://www.nemi.gov or from
  Thermo Scientific, 166 Cummings Center, Beverly, MA 01915, http://www.thermo.com.
\13\ Modified Colitag TM Method. ``Modified Colitag TM Test Method for the Simultaneous Detection of E. coli and other Total Coliforms in Water (ATP D05-
  0035),'' August 28, 2009. Available at https://www.nemi.gov or from CPI International, 5580 Skylane Boulevard, Santa Rosa, CA 95403.
\14\ EPA Method 557. ``Determination of Haloacetic Acids, Bromate, and Dalapon in Drinking Water by Ion Chromatography Electrospray Ionization Tandem
  Mass Spectrometry (IC-ESI-MS/MS),'' September 2009. EPA 815-B-09-012. Available at http://water.epa.gov/drink/.
\15\ AMI Turbiwell, ``Continuous Measurement of Turbidity Using a SWAN AMI Turbiwell Turbidimeter,'' August 2009. Available at https://www.nemi.gov or
  from Markus Bernasconi, SWAN Analytische Instrumente AG, Studbachstrasse 13, CH-8340 Hinwil, Switzerland.
\16\ EPA Method 334.0. ``Determination of Residual Chlorine in Drinking Water Using an On-line Chlorine Analyzer,'' September 2009. EPA 815-B-09-013.
  Available at http://water.epa.gov/drink/.
\17\ ChloroSense. ``Measurement of Free and Total Chlorine in Drinking Water by Palintest ChloroSense,'' August 2009. Available at https://www.nemi.gov
  or from Palintest Ltd., 21 Kenton Lands Road, P.O. Box 18395, Erlanger, KY 41018.
\18\ EPA Method 302.0. ``Determination of Bromate in Drinking Water using Two-Dimensional Ion Chromatography with Suppressed Conductivity Detection,''
  September 2009. EPA 815-B-09-014. Available at http://water.epa.gov/drink/.
\19\ EPA 415.3, Revision 1.2. ``Determination of Total Organic Carbon and Specific UV Absorbance at 254 nm in Source Water and Drinking Water,''
  September 2009. EPA/600/R-09/122. Available at http://www.epa.gov/nerlcwww/ordmeth.htm.
\20\ Readycult[supreg] Method, ``Readycult[supreg] Coliforms 100 Presence/Absence Test for Detection and Identification of Coliform Bacteria and
  Escherichia coli in Finished Waters,'' January, 2007. Version 1.1. Available from EMD Millipore (division of Merck KGaA, Darmstadt, Germany), 290
  Concord Road, Billerica, MA 01821.
\21\ Chromocult[supreg] Method, ``Chromocult[supreg] Coliform Agar Presence/Absence Membrane Filter Test Method for Detection and Identification of
  Coliform Bacteria and Escherichia coli in Finished Waters,'' November, 2000. Version 1.0. EMD Millipore (division of Merck KGaA, Darmstadt, Germany),
  290 Concord Road, Billerica, MA 01821.
\22\ Hach Company. ``Hach Company SPADNS 2 (Arsenite-Free) Fluoride Method 10225--Spectrophotometric Measurement of Fluoride in Water and Wastewater,''
  January 2011. 5600 Lindbergh Drive, P.O. Box 389, Loveland, Colorado 80539. (Available at http://www.hach.com.)
\23\ Hach Company. ``Hach Company TNTplus\TM\ 835/836 Nitrate Method 10206--Measurement of Nitrate in Water and Wastewater,'' January 2011. 5600
  Lindbergh Drive, P.O. Box 389, Loveland, Colorado. (Available at http://www.hach.com.)
\24\ EPA Method 525.3. ``Determination of Semivolatile Organic Chemicals in Drinking Water by Solid Phase Extraction and Capillary Column Gas
  Chromatography/Mass Spectrometry (GC/MS),'' February 2012. EPA/600/R-12/010. Available at http://www.epa.gov/nerlcwww/ordmeth.htm.
\25\ EPA Method 536. ``Determination of Triazine Pesticides and their Degradates in Drinking Water by Liquid Chromatography Electrospray Ionization
  Tandem Mass Spectrometry (LC/ESI-MS/MS),'' October 2007. EPA 815-B-07-002. Available at http://water.epa.gov/drink.
\26\ EPA Method 523. ``Determination of Triazine Pesticides and their Degradates in Drinking Water by Gas Chromatography/Mass Spectrometry (GC/MS),''
  February 2011. EPA 815-R-11-002. Available at http://water.epa.gov/drink.
\27\ EPA Method 1623.1. ``Cryptosporidium and Giardia in Water by Filtration/IMS/FA,'' 2012. EPA-816-R-12-001. (Available at http://water.epa.gov/drink drink.)
\28\ Standard Methods for the Examination of Water and Wastewater, 22nd edition (2012). Available from American Public Health Association, 800 I Street
  NW., Washington, DC 20001-3710.
\29\ EPA Method 524.4, Version 1.0. ``Measurement of Purgeable Organic Compounds in Water by Gas Chromatography/Mass Spectrometry using Nitrogen Purge
  Gas,'' May 2013. EPA 815-R-13-002. Available at http://water.epa.gov/drink.
\30\ Charm Sciences Inc. ``Fast Phage Test Procedure. Presence/Absence for Coliphage in Ground Water with Same Day Positive Prediction''. Version 009.
  November 2012. 659 Andover Street, Lawrence, MA 01843. Available at www.charmsciences.com.

[[Page 37468]]

[FR Doc. C1-2013-12729 Filed 6-20-13; 8:45 am]
BILLING CODE 1505-01-D