Conn. Agencies Regs. § 22a-134tt-app2
Appendix 2 to the RBCRs
Direct Exposure Criteria for Soil
| Substance | Residential DEC in mg/kg (ppm) | Industrial/ Commercial DEC in mg/kg (ppm) |
|---|---|---|
| Volatile Organic Substances | ||
| Acetone | 500 | 1,000 |
| Acrylonitrile | 1.1 | 11 |
| Benzene | 21 | 200 |
| Bromoform | 78 | 720 |
| 2-Butanone(MEK) | 500 | 1,000 |
| Carbon tetrachloride | 4.7 | 44 |
| Chlorobenzene | 500 | 1,000 |
| Chloroform | 100 | 940 |
| Dibromochloromethane | 7.3 | 68 |
| 1,2-Dichlorobenzene | 500 | 1,000 |
| 1,3-Dichlorobenzene | 500 | 1,000 |
| 1,4-Dichlorobenzene | 26 | 240 |
| 1,1-Dichloroethane | 500 | 1,000 |
| 1,2-Dichloroethane | 6.7 | 63 |
| 1,1-Dichloroethylene | 1 | 9.5 |
| cis-1,2-Dichloroethylene | 500 | 1,000 |
| trans-1,2-Dichloroethylene | 500 | 1,000 |
| 1,2-Dichloropropane | 9 | 84 |
| 1,3-Dichloropropene | 3.4 | 32 |
| Ethylbenzene | 500 | 1,000 |
| Ethylene dibromide (EDB) | 0.007 | 0.067 |
| Methyl-tert-butyl-ether | 500 | 1,000 |
| Methyl isobutyl ketone | 500 | 1,000 |
| Methylene chloride | 82 | 760 |
| Styrene | 500 | 1,000 |
| 1,1,1,2-Tetrachloroethane | 24 | 220 |
| 1,1,2,2-Tetrachloroethane | 3.1 | 29 |
| Tetrachloroethylene | 12 | 110 |
| Toluene | 500 | 1,000 |
| 1,1,1-Trichloroethane | 500 | 1,000 |
| 1,1,2-Trichloroethane | 11 | 100 |
| Trichloroethylene | 56 | 520 |
| Vinyl chloride | 0.32 | 3 |
| Xylenes | 500 | 1,000 |
| Substance | Residential DEC in mg/kg (ppm) | Industrial/ Commercial DEC in mg/kg (ppm) |
| Semi-volatile Organic Substances | ||
| Acenaphthylene | 1,000 | 2,500 |
| Anthracene | 1,000 | 2,500 |
| Benzo(a)anthracene | 1 | 7.8 |
| Benzo(b)fluoranthene | 1 | 7.8 |
| Benzo(k)fluoranthene | 8.4 | 78 |
| Benzo(a)pyrene | 1 | 1 |
| Bis(2-chloroethyl)ether | 1 | 5.2 |
| Bis(2-chloroisopropyl)ether | 8.8 | 82 |
| Bis(2-ethyl hexyl)phthalate | 44 | 410 |
| Butyl benzyl phthalate | 1,000 | 2,500 |
| 2-chlorophenol | 340 | 2,500 |
| Di-n-butyl phthalate | 1,000 | 2,500 |
| Di-n-octyl phthalate | 1,000 | 2,500 |
| 2,4-Dichlorophenol | 200 | 2,500 |
| Fluoranthene | 1,000 | 2,500 |
| Fluorene | 1,000 | 2,500 |
| Hexachloroethane | 44 | 410 |
| Hexachlorobenzene | 1 | 3.6 |
| Naphthalene | 1,000 | 2,500 |
| Pentachlorophenol | 5.1 | 48 |
| Phenanthrene | 1,000 | 2,500 |
| Phenol | 1,000 | 2,500 |
| Pyrene | 1,000 | 2,500 |
| Substance | Residential DEC in mg/kg (ppm) | Industrial/ Commercial DEC in mg/kg (ppm) |
| Inorganic Substances | ||
| Antimony | 27 | 8,200 |
| Arsenic | 10 | 10 |
| Barium | 4,700 | 140,000 |
| Beryllium | 2 | 2 |
| Cadmium | 34 | 1,000 |
| Chromium, trivalent | 3,900 | 51,000 |
| Chromium, hexavalent | 100 | 100 |
| Copper | 2,500 | 76,000 |
| Cyanide | 1,400 | 41,000 |
| Lead | 400 | 1,000 |
| Mercury | 20 | 610 |
| Nickel | 1,400 | 7,500 |
| Selenium | 340 | 10,000 |
| Silver | 340 | 10,000 |
| Thallium | 5.4 | 160 |
| Vanadium | 470 | 14,000 |
| Zinc | 20,000 | 610,000 |
| Substance | Residential DEC in mg/kg (ppm) | Industrial/ Commercial DEC in mg/kg (ppm) |
| Pesticides, PCBs and Extractable Total Petroleum Hydrocarbons | ||
| Alachlor | 7.7 | 72 |
| Aldicarb | 14 | 410 |
| Atrazine | 2.8 | 26 |
| Chlordane | 0.49 | 2.2 |
| Dieldrin | 0.038 | 0.36 |
| Endrin | 20 | 610 |
| 2-4 D | 680 | 20,000 |
| Heptachlor epoxide | 0.067 | 0.63 |
| Heptachlor | 0.14 | 1.3 |
| Lindane | 20 | 610 |
| Methoxychlor | 340 | 10,000 |
| Toxaphene | 0.56 | 5.2 |
| PCBs (The use of the Industrial/Commercial DEC requires the parcel to be used pursuant to section 22a-134tt-9(b)(4) of the RBCRs, and in accordance with title 40 CFR Part 761) | 1 | 10 |
| TPH- Total Petroleum Hydrocarbons by EPA Method 418.1 (This method shall not be used for the analysis of samples collected after June 30, 2009) | 500 | 2,500 |
| Extractable Total Petroleum Hydrocarbons by CT ETPH Analysis (This method may be used for the analysis of samples collected on or after June 22, 1999) | 500 | 2,500 |
(Effective March 1, 2026)