Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 611 - PRIMARY DRINKING WATER STANDARDS
Subpart O - ORGANIC MONITORING AND ANALYTICAL REQUIREMENTS
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.
