Conn. Agencies Regs. § 22a-134tt-app9
Appendix 9 to the RBCRs
Equations, Terms, and Values for Calculating Release-Specific Alternative Pollutant Mobility Criteria
(2) The abbreviations in subdivision (1) of this Appendix, shall be interpreted in accordance with the following table and shall be assigned the values specified therein:
| Terms | Description | Value | Units |
| Alt PMC | Alternative Pollutant Mobility Criteria | calculated | mg/kg |
| GWC | Groundwater Criteria Goal | substance-specific (lowest of groundwater criteria applicable to release area*) | mg/L |
| DF | Dilution Factor | 20 or calculated in accordance with section 22a-134tt-9(c)(3)(B)(iv) of the RSRs with Fadj = 0 | unitless |
| Kd | Distribution Coefficient (for organic contaminants may be approximated by: Koc*foc) | substance-specific (see table below for inorganic substances) | L/kg |
| Koc | Organic Carbon Partition Coefficient | substance-specific (see table below for organic substances) | L/kg |
| foc | Soil Fraction of Organic Carbon | 0.001 or tested for site-specific value (max value = 0.006) | kg/kg |
| θw | Water-filled Soil Porosity | 0.28 or tested for site-specific value | Lwater/Lsoil |
| θa | Air-filled Soil Porosity | 0.15 or tested for site-specific value | Lair/Lsoil |
| H’ | Henry’s Law Constant | substance-specific (see tables below) | unitless |
| ρb | Dry Soil Bulk Density | 1.5 or tested for site-specific value | kg/L |
* The “lowest of groundwater criteria applicable to release area” is intended to be the criteria in Appendices C, D, and E.
Soil Organic Carbon-Water Partition Coefficient (Koc) and Henry’s Law Constant (H’) Values for Organic Substances
| Substance | Koc (L/kg) | H' (Dimensionless) |
|---|---|---|
| Acenaphthylene | 6,800 | 4.51E-03 |
| Acetone | 0.575 | 1.75E-03 |
| Acrylonitrile | 2 | 4.10E-03 |
| Alachlor | 310 | 4.30E-07 |
| Aldicarb | 24.6 | 5.89E-08 |
| Anthracene | 23,500 | 2.67E-03 |
| Atrazine | 360 | 1.21E-07 |
| Benzene | 62 | 2.26E-01 |
| Benzo(a)anthracene | 358,000 | 1.37E-04 |
| Benzo(a)pyrene | 969,000 | 4.63E-05 |
| Benzo(b)fluoranthene | 1,230,000 | 4.55E-03 |
| Benzo(k)fluoranthene | 1,230,000 | 3.40E-05 |
| Bis(2-chloroethyl)ether | 76 | 7.38E-04 |
| Bis(2-chloroisopropyl)ether | 360 | 3.03E-03 |
| Bis(2-ethylhexyl)phthalate | 111,000 | 4.18E-06 |
| Bromoform | 126 | 2.18E-02 |
| 2-Butanone (MEK) | 10 | 1.12E-03 |
| Butyl benzyl phthalate | 13,700 | 5.17E-05 |
| Carbon tetrachloride | 152 | 1.20E+00 |
| Chlordane | 51,300 | 1.99E-03 |
| Chlorobenzene | 224 | 1.61E-01 |
| Chloroform | 53 | 1.39E-01 |
| 2-Chlorophenol | 398 | 1.60E-02 |
| Dibromochloromethane (Chlorodibromomethane) | 63.1 | 3.21E-02 |
| 1,2-Dichlorobenzene (o) | 379 | 7.95E-02 |
| 1,3-Dichlorobenzene (m) | 700 | 1.08E-01 |
| 1,4-Dichlorobenzene (p) | 616 | 1.12E-01 |
| 1,1-Dichloroethane | 53 | 2.23E-01 |
| 1,2-Dichloroethane | 38 | 4.51E-02 |
| 1,1-Dichloroethylene | 65 | 6.11E-01 |
| cis-1,2-Dichloroethylene | 35.5 | 1.70E-01 |
| trans-1,2-Dichloroethylene | 38 | 3.80E-01 |
| 2,4-Dichlorophenol | 159 | 1.30E-04 |
| 2,4-Dichlorophenoxyacetic acid (2,4-D) | 29.6 | 1.45E-06 |
| 1,2-Dichloropropane | 47 | 1.16E-01 |
| 1,3-Dichloropropene | 27 | 1.44E-01 |
| Dieldrin | 25,500 | 6.19E-04 |
| Di-n-butyl phthalate | 1,570 | 3.85E-08 |
| Di-n-octyl phthalate | 140,000 | 2.74E-03 |
| Ethylbenzene | 204 | 1.41E-01 |
| Ethylene dibromide (EDB) | 66 | 2.76E-02 |
| Fluoranthene | 49,100 | 6.60E-04 |
| Fluorene | 7,710 | 2.61E-03 |
| Heptachlor | 9,530 | 4.47E-02 |
| Heptachlor epoxide | 83,200 | 3.90E-04 |
| Hexachlorobenzene | 80,000 | 5.41E-02 |
| γ-HCH (Lindane) | 1,350 | 5.74E-04 |
| Hexachloroethane | 1,780 | 1.59E-01 |
| Methoxychlor | 80,000 | 6.48E-04 |
| Methyl isobutyl ketone | 65 | 5.33E-03 |
| Methyl-tert-butyl-ether (MTBE) | 34 | 2.42E-02 |
| Methylene chloride | 10 | 1.31E-01 |
| Naphthalene | 1,190 | 1.98E-02 |
| Pentachlorobenzene | 32,100 | 2.87E-02 |
| Pentachlorophenol | 7,960 | 1.00E-06 |
| Phenanthrene | 21,200 | 9.43E-04 |
| Phenol | 28.8 | 1.63E-05 |
| Pyrene | 68,000 | 4.51E-04 |
| Simazine | 147 | 3.85E-08 |
| Styrene | 912 | 1.07E-01 |
| 1,1,1,2-Tetrachloroethane | 86 | 4.51E-01 |
| 1,1,2,2-Tetrachloroethane | 79 | 1.56E-02 |
| Tetrachloroethylene | 265 | 8.36E-02 |
| Toluene | 140 | 2.74E-01 |
| Toxaphene | 95,800 | 2.46E-04 |
| 1,1,1-Trichloroethane | 135 | 9.47E-01 |
| 1,1,2-Trichloroethane | 75 | 3.73E-02 |
| Trichloroethylene | 94 | 3.74E-01 |
| Vinyl chloride | 18.6 | 1.14E+00 |
| Xylenes | 1,700 | 2.16E-01 |
Distribution Coefficient (Kd) and Henry’s Law Constant (H’) Values for Inorganic Substances
| Substance | Kd (L/kg) | H' (Dimensionless) |
| Antimony | 45 | - |
| Arsenic | 25 | - |
| Barium | 12 | - |
| Beryllium | 26 | - |
| Cadmium | 17 | - |
| Chromium (hexavalent or total) | 31 | - |
| Chromium (trivalent only) | 1,900 | - |
| Copper | 35 | - |
| Cyanide | 9.9 | - |
| Lead | 900 | - |
| Mercury | 0.06 | 4.67E-01 |
| Nickel | 18 | - |
| Silver | 0.13 | - |
| Selenium | 17 | - |
| Thallium | 45 | - |
| Vanadium | 1,000 | - |
| Zinc | 18 | - |
(Effective March 1, 2026)