§143.4 Monitoring.

(a) It is recommended that the parameters in these regulations should be monitored at intervals no less frequent than the monitoring performed for inorganic chemical contaminants listed in the National Interim Primary Drinking Water Regulations as applicable to community water systems. More frequent monitoring would be appropriate for specific parameters such as pH, color, odor or others under certain circumstances as directed by the State.

(b) Measurement of pH, copper and fluoride to determine compliance under §143.3 may be conducted with one of the methods in §141.23(k)(1). Analyses of aluminum, chloride, foaming agents, iron, manganese, odor, silver, sulfate, total dissolved solids (TDS) and zinc to determine compliance under §143.3 may be conducted with the methods in the following table. Criteria for analyzing aluminum, copper, iron, manganese, silver and zinc samples with digestion or directly without digestion, and other analytical test procedures are contained in Technical Notes on Drinking Water Methods, EPA-600/R-94-173, October 1994, which is available at NTIS PB95-104766.

--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                     SM \4\  18th and 19th
            Contaminant                        EPA                  ASTM \3\                  ed.              SM \4\  20th ed.            Other
--------------------------------------------------------------------------------------------------------------------------------------------------------
1. Aluminum........................  200.7 \2\.............  ......................  3120 B...............  3120 B...............
                                     200.8 \2\.............  ......................  3113 B...............
                                     200.9 \2\.............  ......................  3111 D...............
2. Chloride........................  300.0 \1\.............  D4327-97..............  4110 B...............  4110 B...............
                                     ......................  ......................  4500-Cl[SU]-[/SU] D..  4500_Cl[SU]-[/SU] D..
                                     ......................  D512-89B..............  4500-Cl[SU]-[/SU] B..  4500-Cl[SU]-[/SU] B..
3. Color...........................  ......................  ......................  2120 B...............  2120 B...............
4. Foaming Agents..................  ......................  ......................  5540 C...............  5540 C...............
5. Iron............................  200.7 \2\.............  ......................  3120 B...............  3120 B...............
                                     200.9 \2\.............  ......................  3111 B...............
                                     ......................  ......................  3113 B...............
6. Manganese.......................  200.7 \2\.............  ......................  3120 B...............  3120 B...............
                                     200.8 \2\.............  ......................  3111 B...............
                                     200.9 \2\.............  ......................  3113 B...............
7. Odor............................  ......................  ......................  2150 B...............  2150 B...............
8. Silver..........................  200.7 \2\.............  ......................  3120 B...............  3120 B...............  I-3720-85 \5\
                                     200.8 \2\.............  ......................  3111 B...............
                                     200.9 \2\.............  ......................  3113 B...............
9. Sulfate.........................  300.0 \1\.............  D4327-97..............  4110 B...............  4110 B...............
                                     375.2 \1\.............  ......................  4500-SO[INF]4[/        4500-SO[INF]4[/
                                                                                      INF][SU]2-[/SU] F.     INF][SU]2-[/SU] F.
                                                                                     4500-SO[INF]4[/        4500-SO[INF]4[/
                                                                                      INF][SU]2-[/SU]C, D.   INF][SU]2-[/SU]C, D.
                                                             D516-90...............  4500-SO[INF]4[/        4500-SO[INF]4[/
                                                                                      INF][SU]2-[/SU] E.     INF][SU]2-[/SU] E.
10. Total Dissolved Solids.........  ......................  ......................  2540 C...............  2540 C...............
11. Zinc...........................  200.7 \2\.............  ......................  3120 B...............  3120 B...............
                                     200.8 \2\.............  ......................  3111 B ..............
--------------------------------------------------------------------------------------------------------------------------------------------------------
The procedures shall be done in accordance with the documents listed below. The incorporation by reference of the following documents was approved by
  the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies of the documents may be obtained from the sources
  listed below. Information regarding obtaining these documents can be obtained from the Safe Drinking Water Hotline at 800-426-4791. Documents may be
  inspected at EPA's Drinking Water Docket, EPA West, 1301 Constitution Avenue, NW, Room B135, Washington, DC (Telephone: 202-566-2426); or at the
  Office of Federal Register, 800 North Capitol Street, NW, Suite 700, Washington, DC 20408.
\1\ ``Methods for the Determination of Inorganic Substances in Environmental Samples'', EPA/600/R-93-100, August 1993. Available at NTIS, PB94-120821.
\2\ ``Methods for the Determination of Metals in Environmental Samples_Supplement I'', EPA/600/R-94-111, May 1994. Available at NTIS, PB 95-125472.
\3\ Annual Book of ASTM Standards, 1994, 1996, or 1999, Vols. 11.01 and 11.02, ASTM International; any year containing the cited version of the method
  may be used. Copies may be obtained from ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428.
 
\4\ Standard Methods for the Examination of Water and Wastewater, 18th edition (1992), 19th edition (1995), or 20th edition (1998). American Public
  Health Association, 1015 Fifteenth Street, NW, Washington, DC 20005. The cited methods published in any of these three editions may be used, except
  that the versions of 3111 B, 3111 D, and 3113 B in the 20th edition may not be used.
\5\ Method I-3720-85, Techniques of Water Resources Investigation of the U.S. Geological Survey, Book 5, Chapter A-1, 3rd ed., 1989; Available from
  Information Services, U.S. Geological Survey, Federal Center, Box 25286, Denver, CO 80225-0425.

[44 FR 42198, July 19, 1979, as amended at 53 FR 5147, Feb. 19, 1988; 56 FR 30281, July 1, 1991; 59 FR 62470, Dec. 5, 1994; 64 FR 67466, Dec. 1, 1999; 67 FR 65252, Oct. 23, 2002]