R 325.10604d MCLs for synthetic organic chemicals.

Rule 604d. (1) The maximum contaminant levels and effective dates for synthetic organic chemicals in table 1 of this rule apply to community and nontransient, noncommunity water supplies. Table 1 MCLs for synthetic organic chemicals Contaminant Maximum Contaminant Level in mg/l Effective Date Alachlor 0.002 July 30, 1992. Aldicarb 0.003 July 30, 1992. Aldicarb sulfoxide 0.004 July 30, 1992. Aldicarb sulfone 0.002 July 30, 1992. Atrazine 0.003 July 30, 1992. Benzo(a)pyrene 0.0002 January 17, 1994. Carbofuran 0.04 July 30, 1992. Chlordane 0.002 July 30, 1992. Dalapon 0.2 January 17, 1994. Di(2-ethylhexyl)adipate 0.4 January 17, 1994. Di(2- ethylhexyl)phthalate 0.006 January 17, 1994. Dibromochloropropane 0.0002 July 30, 1992. Dinoseb 0.007 January 17, 1994. Diquat 0.02 January 17, 1994. Endothall 0.1 January 17, 1994. Endrin 0.002 August 17, 1992. Ethylene dibromide 0.00005 July 30, 1992. Glyphosate 0.7 January 17, 1994. Heptachlor 0.0004 July 30, 1992. Heptachlor epoxide 0.0002 July 30, 1992. Hexachlorobenzene 0.001 January 17, 1994. Hexachlorocyclopentadi ene 0.05 January 17, 1994. Lindane 0.0002 July 30, 1992. Methoxychlor 0.04 July 30, 1992. Oxamyl (vydate) 0.2 January 17, 1994. Pentachlorophenol 0.001 July 30, 1992. Picloram 0.5 January 17, 1994. Polychlorinated biphenyls 0.0005 July 30, 1992. Simazine 0.004 January 17, 1994. Toxaphene 0.003 July 30, 1992. 2,3,7,8-TCDD (dioxin) 3 X 10-8 January 17, 1994. 2,4-D 0.07 July 30, 1992. 2,4,5-TP silvex 0.05 July 30, 1992. (2) Compliance with the MCLs in table 1 of this rule shall be determined based on the analytical results obtained at each sampling point. If 1 sampling point is in violation of an MCL, then the supply is in violation of the MCL. All of the following provisions apply: (a) For supplies monitoring more than once per year, compliance with the MCL is determined by a running annual average at each sampling point. (b) Supplies monitoring annually or less frequently whose sample results exceed the regulatory detection level as defined in R 325.10605 shall begin quarterly sampling. Compliance with the MCL shall be based on the running annual average. For the purpose of calculating the running annual average, the initial exceedance shall be the result for the first quarter. If the department requires a confirmation sample under R 325.10717(12), then the average of the initial exceedance and the confirmation sample shall be the result for the first quarter. The supply shall not be in violation of the MCL until it has completed 1 year of quarterly sampling. (c) If any sample result causes the running annual average to exceed the MCL at any sampling point, then the supply is out of compliance with the MCL immediately. (d) If a supply fails to collect the required number of samples, then compliance shall be based on the total number of samples collected. (e) If a sample result is less than the detection limit, then zero shall be used to calculate the annual average.