Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 742 - TIERED APPROACH TO CORRECTIVE ACTION OBJECTIVES
Subpart L - BUILDING CONTROL TECHNOLOGIES
Appendix C - Tier 2 Illustrations and Tables
Table B - SSL Parameters
|
Symbol |
Parameter |
Units |
Source |
Parameter Value(s) |
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|
AT |
Averaging Time for Noncarcinogens in Ingestion Equation |
yr |
Residential = 6 Industrial/Commercial = 25 Construction Worker = 0.115 |
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AT |
Averaging Time for Noncarcinogens in Inhalation Equation |
yr |
Residential = 30 Industrial/Commercial = 25 Construction Worker = 0.115 |
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|
ATc |
Averaging Time for Carcinogens |
yr |
SSL |
70 |
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|
BW |
Body Weight |
kg |
Residential = 15, noncarcinogens 70, carcinogens Industrial/Commercial = 70 Construction Worker = 70 |
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|
Csat |
Soil Saturation Concentration |
mg/kg |
Appendix A, Table A or Equation S29 in Appendix C, Table A |
Chemical-Specific or Calculated Value |
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|
Cw |
Target Soil Leachate Concentration |
mg/L |
Equation S18 in Appendix C, Table A |
Groundwater Standard, Health Advisory concentration, or Calculated Value |
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|
d |
Mixing Zone Depth |
m |
SSL or Equation S25 in Appendix C, Table A |
2 m or Calculated Value |
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|
da |
Aquifer Thickness |
m |
Field Measurement |
Site-Specific |
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|
ds |
Depth of Source (Vertical thickness of contamination) |
m |
Field Measurement or Estimation |
Site-Specific |
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|
Symbol |
Parameter |
Units |
Source |
Parameter Value(s) |
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|
DA |
Apparent Diffusivity |
cm2/s |
Equation S10 in Appendix C, Table A |
Calculated Value |
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|
Di |
Diffusivity in Air |
cm2/s |
Appendix C, Table E |
Chemical-Specific |
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|
Dw |
Diffusivity in Water |
cm2/s |
Appendix C, Table E |
Chemical-Specific |
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|
DF |
Dilution Factor |
unitless |
Equation S22 in Appendix C, Table A |
20 or Calculated Value |
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|
ED |
Exposure Duration for Ingestion of Carcinogens |
yr |
Industrial/Commercial = 25 Construction Worker = 1 |
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|
ED |
Exposure Duration for Inhalation of Carcinogens |
yr |
Residential = 30 Industrial/Commercial = 25 Construction Worker = 1 |
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|
ED |
Exposure Duration for Ingestion of Noncarcinogens |
yr |
Residential = 6 Industrial/Commercial = 25 Construction Worker = 1 |
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|
ED |
Exposure Duration for Inhalation of Noncarcinogens |
yr |
Residential = 30 Industrial/Commercial = 25 Construction Worker = 1 |
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|
ED |
Exposure Duration for the Direct Ingestion of Groundwater |
yr |
Residential = 30 Industrial/Commercial = 25 Construction Worker = 1 |
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|
EDM-L |
Exposure Duration for Migration to Groundwater Mass-Limit Equation S28 |
yr |
SSL |
70 |
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|
EF |
Exposure Frequency |
d/yr |
Residential = 350 Industrial/Commercial = 250 Construction Worker = 30 |
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|
F(x) |
Function dependent on Um/Ut |
unitless |
SSL |
0.194 |
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|
foc |
Organic Carbon Content of Soil |
g/g |
SSL or Field Measurement (See Appendix C, Table F) |
Surface Soil = 0.006 Subsurface soil = 0.002, or Site-Specific |
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|
GWobj |
Groundwater Remediation Remediation Objective |
mg/L |
Appendix B, Table E, 35 IAC 620.Subpart F, or Equation S23 in Appendix C, Table A |
Chemical-Specific or Calculated |
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|
H' |
Henry's Law Constant |
unitless |
Appendix C, Table E |
Chemical-Specific |
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|
i |
Hydraulic Gradient |
m/m |
Field Measurement (See Appendix C, Table F) |
Site-Specific |
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|
I |
Infiltration Rate |
m/yr |
SSL |
0.3 |
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|
IM-L |
Infiltration Rate for Migration to Groundwater Mass-Limit Equation S28 |
m/yr |
SSL |
0.18 |
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|
IFsoil-adj (residential) |
Age Adjusted Soil Ingestion Factor for Carcinogens |
(mg-yr)/ (kg-d) |
SSL |
114 |
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|
IRsoil |
Soil Ingestion Rate |
mg/d |
Residential = 200 Industrial/Commercial = 50 Construction Worker = 480 |
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|
IRW |
Daily Water Ingestion Rate |
L/d |
Residential = 2 Industrial/Commercial = 1 |
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|
K |
Aquifer Hydraulic Conductivity |
m/yr |
Field Measurement (See Appendix C, Table F) |
Site-Specific |
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|
Kd (Non-ionizing organics) |
Soil-Water Partition Coefficient |
cm3/g or L/kg |
Equation S19 in Appendix C, Table A |
Calculated Value |
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|
Kd (Ionizing organics) |
Soil-Water Partition Coefficient |
cm3/g or L/kg |
Equation S19 in Appendix C, Table A |
Chemical and pH-Specific (see Appendix C, Table I) |
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|
Kd (In-organics) |
Soil-Water Partition Coefficient |
cm3/g or L/kg |
Appendix C, Table J |
Chemical and pH-Specific |
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|
Koc |
Organic Carbon Partition Coefficient |
cm3/g or L/kg |
Appendix C, Table E or Appendix C, Table I |
Chemical-Specific |
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|
Ks |
Saturated Hydraulic Conductivity |
m/yr |
Appendix C, Table K Appendix C, Illustration C |
Site-Specific |
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|
L |
Source Length Parallel to Groundwater Flow |
m |
Field Measurement |
Site-Specific |
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|
PEF |
Particulate Emission Factor |
m3/kg |
SSL or Equation S15 in Appendix C, Table A |
Residential = 1.32 * 109 or Site-Specific Industrial/Commercial = 1.24 * 109 or Site-Specific |
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|
PEF[PRIME] |
Particulate Emission Factor adjusted for Agitation (construction worker) |
m3/kg |
Equation S16 in Appendix C, Table A using PEF (industrial/commercial) |
1.24 * 108 or Site-Specific |
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|
Q/C (used in VF equations) |
Inverse of the mean concentration at the center of a square source |
(g/m2-s)/ (kg/m3) |
Appendix C, Table H |
Residential = 68.81 Industrial/Commercial = 85.81 Construction Worker = 85.81 |
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|
Q/C (used in PEF equations) |
Inverse of the mean concentration at the center of a square source |
(g/m2-s)/ (kg/m3) |
SSL or Appendix C, Table H |
Residential = 90.80 Industrial/Commercial = 85.81 Construction Worker = 85.81 |
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|
RfC |
Inhalation Reference Concentration |
mg/m3 |
Illinois EPA: http://www.epa.state.il.us/land/taco/toxicity-values.xl |
Toxicological-Specific (Note: for Construction Workers use subchronic reference concentrations) |
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|
RfDo |
Oral Reference Dose |
mg/(kg-d) |
Illinois EPA: http://www.epa.state.il.us/land/taco/toxicity-values.xls |
Toxicological-Specific (Note: for Construction Workers use subchronic reference doses) |
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|
ROsoil |
Soil remediation objective |
mg/kg |
Equation S30 in Appendix C, Table A |
Calculated value |
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|
ROsoil gas |
Soil gas remediation objective |
mg/m3 |
Equation S30 in Appendix C, Table A |
Calculated value |
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|
S |
Solubility in Water |
mg/L |
Appendix C, Table E |
Chemical-Specific |
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|
SFo |
Oral Slope Factor |
(mg/kg-d)-1 |
Illinois EPA: http://www.epa.state.il.us/land/taco/toxicity-values.xl |
Toxicological-Specific |
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|
T |
Exposure Interval |
s |
Residential = 9.5 * 108 Industrial/Commercial = 7.9 * 108 Construction Worker = 3.6 * 106 |
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|
TM-L |
Exposure Interval for Mass-Limit Volatilization Factor Equation S26 |
yr |
SSL |
30 |
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|
THQ |
Target Hazard Quotient |
unitless |
SSL |
1 |
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|
TR |
Target Cancer Risk |
unitless |
Residential = 10-6 at the point of human exposure Industrial/Commercial = 10-6 at the point of human exposure Construction Worker = 10-6 at the point of human exposure |
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|
Um |
Mean Annual Windspeed |
m/s |
SSL |
4.69 |
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|
URF |
Inhalation Unit Risk Factor |
(µg/m3)-1 |
Illinois EPA: http://www.epa.state.il.us/land/taco/toxicity-values.xl |
Toxicological-Specific |
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|
Ut |
Equivalent Threshold Value of Windspeed at 7 m |
m/s |
SSL |
11.32 |
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|
V |
Fraction of Vegetative Cover |
unitless |
SSL or Field Measurement |
0.5 of Site-Specific |
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|
VF |
Volatilization Factor |
m3/kg |
Equation S8 in Appendix C, Table A |
Calculated Value |
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|
VF[PRIME] |
Volatilization Factor adjusted for Agitation |
m3/kg |
Equation S9 in Appendix C, Table A |
Calculated Value |
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|
VFM-L |
Mass-Limit Volatilization Factor |
m3/kg |
Equation S26 in Appendix C, Table A |
Calculated Value |
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|
VF[PRIME]M-L |
Mass-Limit Volatilization Factor adjusted for Agitation |
m3/kg |
Equation S27 in Appendix C, Table A |
Calculated Value |
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|
[ETA] |
Total Soil Porosity |
Lpore/Lsoil |
SSL or Equation S24 in Appendix C, Table A |
0.43, or Gravel = 0.25 Sand = 0.32 Silt = 0.40 Clay = 0.36, or Calculated Value |
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|
[THETA]a |
Air-Filled Soil Porosity |
Lair/Lsoil |
SSL or Equation S21 in Appendix C, Table A |
Surface Soil (top 1 meter) = 0.28 Subsurface Soil (below 1 meter) = 0.13, or Gravel = 0.05 Sand = 0.14 Silt = 0.24 Clay = 0.19, or Calculated Value |
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|
[THETA]w |
Water-Filled Soil Porosity |
Lwater/Lsoil |
SSL or Equation S20 in Appendix C, Table A |
Surface Soil (top 1 meter) = 0.15 Subsurface Soil (below 1 meter) = 0.30, or Gravel = 0.20 Sand = 0.18 Silt = 0.16 Clay = 0.17, or Calculated Value |
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|
[RHO]b |
Dry Soil Bulk Density |
kg/L or g/cm3 |
SSL or Field Measurement (See Appendix C, Table F) |
1.5, or Gravel = 2.0 Sand = 1.8 Silt = 1.6 Clay = 1.7, or Site-Specific |
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|
[RHO]s |
Soil Particle Density |
g/cm3 |
SSL or Field Measurement (See Appendix C, Table F) |
2.65, or Site-Specific |
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|
[RHO]w |
Water Density |
g/cm3 |
SSL |
1 |
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|
1/(2b+3) |
Exponential in Equation S20 |
unitless |
Appendix C, Table K Appendix C, Illustration C |
Site-Specific |
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