Conn. Agencies Regs. § 22a-133k-2 - Remediation Standards for Soil
Unless otherwise specified in the RSRs, polluted soil at a release area shall be remediated so that the concentration of a substance in such soil is equal to or less than:
Except as otherwise specified in the RSRs, polluted soil at a release area shall be remediated so that the concentrations of substances in such soil are equal to or less than the residential direct exposure criteria .
The provisions of this subdivision do not apply to soil polluted with PCBs.
Soil at a release area polluted with metals, petroleum
hydrocarbons, or semi-volatile organic substances is not required to be
remediated to the direct exposure criteria for those substances, provided such
Soil polluted with pesticides at a release area as a result of the application of pesticides is not required to be remediated to the direct exposure criteria for such pesticides, provided that a determination has been made that such pesticides are present solely as a result of the application of pesticides and:
Provided that NAPL is not present in the release area above the seasonal high water table, as determined in accordance with subdivision (4) of this subsection, substances in soil in a GB area may be remediated to a concentration at which the results of a TCLP or SPLP analysis of each substance is equal to or less than the groundwater protection criteria:
Geologic |
Infiltration Rate (feet/year) |
Stratified Drift |
2.0 |
Till |
0.5 - 1.0 |
Lacustrine Deposits |
0.4 |
Click here to view
Term |
Description |
Value |
Units |
DF |
Release-specific dilution factor |
substance-specific |
unitless |
K |
Hydraulic conductivity of the unconsolidated aquifer underlying the release area |
calculated |
ft/year |
i |
Horizontal hydraulic gradient |
calculated |
ft/ft |
d |
Aquifer mixing zone default value of 3 feet or a release- specific value calculated using: Click here to view |
3, or as otherwise calculated |
ft |
d[ALPHA] |
Aquifer thickness |
as determined from boring logs |
ft |
I |
Infiltration rate, as identified in section 22a-133k-2(c)(3)(B) (iii)(IV) of the RSRs |
calculated |
ft/year |
L |
Length of the release area parallel to the direction of groundwater flow |
as measured |
ft |
Fadj |
Background concentration for groundwater divided by the groundwater protection criteria for the subject substance or, where the background concentration for groundwater cannot be quantified, one half the laboratory reporting limit for the subject substance divided by the groundwater protection criteria for the subject substance |
calculated |
unitless |
Click here to view
Terms |
Description |
Units |
Value |
CNAP |
Concentration of an organic substance at which or above which such substance may be present in a non-aqueous phase |
mg/kg |
calculated |
S |
Effective solubility |
mg/L |
substance-specific |
Pb |
Dry soil bulk density |
kg/L |
1.5 or the lowest value measured at the subject release area |
Kd |
Soil-water partition coefficient, which is calculated using Kd = Koc*foc |
L/kg |
calculated |
Koc |
Soil organic carbon-water partition coefficient |
L/kg |
substance-specific |
foc |
Fraction organic carbon of soil |
g/g |
0.006 or the lowest value measured at the subject release area |
[THETA] w |
Water-filled soil porosity Lwater/Lsoil |
Lwater/Lsoil |
0.15 for unsaturated soil or 0.43 for saturated soil |
[THETA] a |
Air-filled soil porosity Lair/Lsoil |
Lair/Lsoil |
0.28 for unsaturated soil or 0.0 for saturated soil |
H' |
Henry's law constant (dimensionless) |
unitless |
H x 41 where 41 is a conversion factor |
H |
Henry's law constant |
atm- m3/mol |
substance-specific |
Polluted soil at a release area above the seasonal high water table is not required to be remediated to the pollutant mobility criteria, provided that:
Polluted soil at a release area polluted with substances, other than volatile organic substances, that exceed DEC or PMC is not required to be remediated to the pollutant mobility criteria, provided that at such release area:.
Soil at a release area polluted with metals, petroleum
hydrocarbons, or semi-volatile organic substances is not required to be
remediated to the pollutant mobility criteria, provided such
Soil polluted with pesticides at a release area as a result of the application of pesticides at such release area is not required to be remediated to the pollutant mobility criteria, provided that a determination has been made that such pesticides are present solely as a result of the application of pesticides and:
With respect to a substance, except PCBs, for which direct
exposure criteria are specified in Appendix A of the RSRs or approved in
writing by the
With respect to substances for which pollutant mobility
criteria are specified in Appendix B of the RSRs or approved by the
With respect to substances for which pollutant mobility
criteria are specified in Appendix B of the RSRs or approved by the
For any request for approval of alternative pollutant mobility criteria or alternative dilution or dilution attenuation factor specified in this subdivision, alternative groundwater criteria shall not be used for the same substance for which alternative soil criteria is requested.
With respect to substances for which pollutant mobility criteria are specified in Appendix B of the RSRs, alternative release-specific pollutant mobility criteria for a particular release area may be calculated by an LEP in accordance with Appendix H of the RSRs and used at a release area, provided that:
Unless an alternative method for determining compliance with
direct exposure criteria has been approved in writing by the
Unless an alternative method for determining compliance with
pollutant mobility criteria has been approved in writing by the
Compliance when remediating to the background concentration for a given substance in soil is achieved when:
Geographically-extensive polluted fill present at a parcel may be eligible for a variance from compliance with the pollutant mobility criteria in accordance with subparagraph (B) or (C) of this subdivision, provided that:
A variance for widespread polluted fill in accordance with this subdivision may be certified in writing by an LEP, provided such LEP determines that a parcel complies with the eligibility requirements in subparagraph (A) of this subdivision and the LEP demonstrates that the following requirements have been satisfied:
The
A release area may be eligible for a variance from compliance with the direct exposure criteria, the pollutant mobility criteria, or both, under this subdivision through the use of an engineered control, provided that:
A variance from compliance with the direct exposure criteria
may be available when an engineered control is used at a release area, provided
an LEP certifies to the
In addition, if a variance under this subclause includes volatile organic substances, such engineered control shall be designed, constructed, and will be maintained, to ensure that any soil vapor migrating from the subject release area complies with all applicable volatilization criteria in accordance with section 22a-133k-3(c)(3) of the RSRs;
After an engineered control has been certified by an LEP or
approved by the
Any soil excavated from or treated at a release area during remediation shall be managed as follows:
In accordance with section
22a-209-8
of the Regulations of Connecticut State Agencies, the
To be reused in any manner, polluted soil shall comply with all
requirements of the RSRs, shall not be placed below the water table, shall not
be placed in an area subject to erosion, and shall comply with the requirements
in subparagraph (A), (B) or (C) of this subdivision. Prior to the reuse of such
soil, a notice or request for the reuse of such soil pursuant to subparagraph
(A), (B) or (C) of this subdivision shall be submitted to the
Polluted soil may be used at any parcel of land if :
Notwithstanding the provisions of subdivision (3) of this
subsection, the
Nothing in the RSRs shall preclude the
At any location at which, despite remediation in accordance
with the RSRs, the
At any location at which polluted soil has eroded into a
At any location at which there is polluted soil containing
multiple polluting substances, the
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.