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

Current through Register Vol. 48, No. 28, July 12, 2024
Symbol
Parameter
Units
Source
Parameter Value(s)
AT
Averaging Time for Noncarcinogens in Ingestion
								Equation
yr
Residential = 6
Industrial/Commercial = 25
Construction Worker = 0.115
AT
Averaging Time for Noncarcinogens in Inhalation
								Equation
yr
Residential = 30
Industrial/Commercial = 25
Construction Worker = 0.115
ATc
Averaging Time for Carcinogens
yr
SSL
70
BW
Body Weight
kg
Residential = 15, noncarcinogens
70, carcinogens
Industrial/Commercial = 70
Construction Worker = 70
Csat
Soil Saturation Concentration
mg/kg
Appendix A, Table A or Equation S29 in Appendix C,
								Table A
Chemical-Specific or Calculated Value
Cw
Target Soil Leachate Concentration
mg/L
Equation S18 in Appendix C, Table A
Groundwater Standard, Health Advisory
								concentration, or Calculated Value
d
Mixing Zone Depth
m
SSL or Equation S25 in Appendix C, Table A
2 m or Calculated Value
da
Aquifer Thickness
m
Field Measurement
Site-Specific
ds
Depth of Source
(Vertical thickness of contamination)
m
Field Measurement or Estimation
Site-Specific
Symbol
Parameter
Units
Source
Parameter Value(s)
DA
Apparent Diffusivity
cm2/s
Equation S10 in Appendix C, Table A
Calculated Value
Di
Diffusivity in Air
cm2/s
Appendix C, Table E
Chemical-Specific
Dw
Diffusivity in Water
cm2/s
Appendix C, Table E
Chemical-Specific
DF
Dilution Factor
unitless
Equation S22 in Appendix C, Table A
20 or Calculated Value
ED
Exposure Duration for Ingestion of
								Carcinogens
yr
Industrial/Commercial = 25
Construction Worker = 1
ED
Exposure Duration for Inhalation of
								Carcinogens
yr
Residential = 30
Industrial/Commercial = 25
Construction Worker = 1
ED
Exposure Duration for Ingestion of
								Noncarcinogens
yr
Residential = 6
Industrial/Commercial = 25
Construction Worker = 1
ED
Exposure Duration for Inhalation of
								Noncarcinogens
yr
Residential = 30
Industrial/Commercial = 25
Construction Worker = 1
ED
Exposure Duration for the Direct Ingestion of
								Groundwater
yr
Residential = 30
Industrial/Commercial = 25
Construction Worker = 1
EDM-L
Exposure Duration for Migration to Groundwater
								Mass-Limit Equation S28
yr
SSL
70
EF
Exposure Frequency
d/yr
Residential = 350
Industrial/Commercial = 250
Construction Worker = 30
F(x)
Function dependent on
								Um/Ut
unitless
SSL
0.194
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
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
H'
Henry's Law Constant
unitless
Appendix C, Table E
Chemical-Specific
i
Hydraulic Gradient
m/m
Field Measurement (See Appendix C, Table F)
Site-Specific
I
Infiltration Rate
m/yr
SSL
0.3
IM-L
Infiltration Rate for Migration to Groundwater
								Mass-Limit Equation S28
m/yr
SSL
0.18
IFsoil-adj
								(residential)
Age Adjusted Soil Ingestion Factor for
								Carcinogens
(mg-yr)/ (kg-d)
SSL
114
IRsoil
Soil Ingestion Rate
mg/d
Residential = 200
Industrial/Commercial = 50
Construction Worker = 480
IRW
Daily Water Ingestion Rate
L/d
Residential = 2
Industrial/Commercial = 1
K
Aquifer Hydraulic Conductivity
m/yr
Field Measurement (See Appendix C, Table F)
Site-Specific
Kd (Non-ionizing
								organics)
Soil-Water Partition Coefficient
cm3/g or L/kg
Equation S19 in Appendix C, Table A
Calculated Value
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)
Kd (In-organics)
Soil-Water Partition Coefficient
cm3/g or L/kg
Appendix C, Table J
Chemical and pH-Specific
Koc
Organic Carbon Partition Coefficient
cm3/g or L/kg
Appendix C, Table E or Appendix C, Table I
Chemical-Specific
Ks
Saturated Hydraulic Conductivity
m/yr
Appendix C, Table K
Appendix C, Illustration C
Site-Specific
L
Source Length Parallel to Groundwater Flow
m
Field Measurement
Site-Specific
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
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
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
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
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)
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)
ROsoil
Soil remediation objective
mg/kg
Equation S30 in Appendix C, Table A
Calculated value
ROsoil gas
Soil gas remediation objective
mg/m3
Equation S30 in Appendix C, Table A
Calculated value
S
Solubility in Water
mg/L
Appendix C, Table E
Chemical-Specific
SFo
Oral Slope Factor
(mg/kg-d)-1
Illinois EPA:
http://www.epa.state.il.us/land/taco/toxicity-values.xl
Toxicological-Specific
T
Exposure Interval
s
Residential = 9.5 *
								108
Industrial/Commercial = 7.9 *
								108
Construction Worker = 3.6 *
								106
TM-L
Exposure Interval for Mass-Limit Volatilization
								Factor Equation S26
yr
SSL
30
THQ
Target Hazard Quotient
unitless
SSL
1
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
Um
Mean Annual Windspeed
m/s
SSL
4.69
URF
Inhalation Unit Risk Factor
(µg/m3)-1
Illinois EPA:
http://www.epa.state.il.us/land/taco/toxicity-values.xl
Toxicological-Specific
Ut
Equivalent Threshold Value of Windspeed at 7
								m
m/s
SSL
11.32
V
Fraction of Vegetative Cover
unitless
SSL or Field Measurement
0.5 of Site-Specific
VF
Volatilization Factor
m3/kg
Equation S8 in Appendix C, Table A
Calculated Value
VF[PRIME]
Volatilization Factor adjusted for Agitation
m3/kg
Equation S9 in Appendix C, Table A
Calculated Value
VFM-L
Mass-Limit Volatilization Factor
m3/kg
Equation S26 in Appendix C, Table A
Calculated Value
VF[PRIME]M-L
Mass-Limit Volatilization Factor adjusted for
								Agitation
m3/kg
Equation S27 in Appendix C, Table A
Calculated Value
[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
[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
[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
[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
[RHO]s
Soil Particle Density
g/cm3
SSL or Field Measurement (See Appendix C, Table
								F)
2.65, or
Site-Specific
[RHO]w
Water Density
g/cm3
SSL
1
1/(2b+3)
Exponential in Equation S20
unitless
Appendix C, Table K
Appendix C, Illustration C
Site-Specific