Definitions

Section 611 Section 611.640  Definitions The following terms are defined for use in this Subpart O only.  Additional definitions are located in Section 611.102. "Old MCL" means an MCL in Section 611.310.  These include the MCLs identified as "additional state requirements".  "Old MCLs" include the Section 611.310 MCLs for the following contaminants: Aldrin 2,4-D DDT Dieldrin Heptachlor Heptachlor epoxide BOARD NOTE:  2,4-D, heptachlor, and heptachlor epoxide are also "Phase II SOCs".  The additional state requirements of Section 611.310 impose a more stringent "old MCL" for each of these compounds than that imposed on them as Phase II SOCs by Section 611.311.  However, the requirements for sampling and monitoring for these compounds as Phase II SOCs and the consequences of their detection and violation of their revised MCLs is more stringent as Phase II SOCs. "Phase II SOCs" means the following: Alachlor Atrazine Carbofuran Chlordane Dibromochloropropane Ethylene dibromide Heptachlor Heptachlor epoxide Lindane Methoxychlor Polychlorinated biphenyls Toxaphene 2,4-D 2,4,5-TP BOARD NOTE:  These are organic contaminants regulated at 40 CFR 141.61(c)(1) through (c)(18) (2016).  The MCLs for these contaminants are located at Section 611.311.  More stringent MCLs for heptachlor, heptachlor epoxide, and 2,4-D are found as "additional state requirements" in Section 611.310. "Phase IIB SOCs" means the following: Aldicarb Aldicarb Sulfone Aldicarb Sulfoxide Pentachlorophenol BOARD NOTE:  These are organic contaminants regulated at 40 CFR 141.61(c)(1) through (c)(18) (2016).  The MCLs for these contaminants are located at Section 611.311.  See the Board note appended to Section 611.311(c) for information relating to implementation of requirements relating to aldicarb, aldicarb sulfone, and aldicarb sulfoxide. "Phase V SOCs" means the following: Benzo(a) pyrene Dalapon Di(2-ethylhexyl)adipate Di(2-ethylhexyl)phthalate Dinoseb Diquat Endothall Endrin Glyphosate Hexachlorobenzene Hexachlorocyclopentadiene Oxamyl Picloram Simazine 2,3,7,8-TCDD BOARD NOTE:  These are organic contaminants regulated at 40 CFR 141.61(c)(19) through (c)(33) (2016).  The MCLs for these contaminants are located at Section 611.311. "Phase I VOCs" means the following: Benzene Carbon tetrachloride p-Dichlorobenzene 1,2-Dichloroethane 1,1-Dichloroethylene 1,1,1-Trichloroethane Trichloroethylene Vinyl chloride BOARD NOTE:  These are the organic contaminants regulated at 40 CFR 141.61(a)(1) through (a)(8) (2016).  The MCLs for these contaminants are located at Section 611.311(a). "Phase II VOCs" means the following: o-Dichlorobenzene cis-1,2-Dichloroethylene trans-1,2-Dichloroethylene 1,2-Dichloropropane Ethylbenzene Monochlorobenzene Styrene Tetrachloroethylene Toluene Xylenes (total) BOARD NOTE:  These are organic contaminants regulated at 40 CFR 141.61(a)(9) through (a)(18) (2016).  The MCLs for these contaminants are in Section 611.311(a). "Phase V VOCs" means the following: Dichloromethane 1,2,4-Trichlorobenzene 1,1,2-Trichloroethane BOARD NOTE:  These are the organic contaminants regulated at 40 CFR 141.61(a)(19) through (a)(21) (2016).  The MCLs for these contaminants are located at Section 611.311(a). "Revised MCL" means an MCL in Section 611.311.  This term includes MCLs for Phase I VOCs, Phase II VOCs, Phase V VOCs, Phase II SOCs, Phase IIB SOCs, and Phase V SOCs.