Louisiana Administrative Code › Title 33 - ENVIRONMENTAL QUALITY › Part V - Hazardous Wastes and Hazardous Materials › Subpart 1 - Department of Environmental Quality-Hazardous Waste › Chapter 1 - General Provisions and Definitions › Section V-199 - Appendices-Appendices A and B

Current through Register Vol. 50, No. 6, June 20, 2024
A.
				  Appendix A- Equations for the Development of Soil and Groundwater Standards
SoilNHEM-Carcinogenic
					 Effects-Organic Constituents (mg/kg):
(EQ1)
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					 Image
Parameter
Definition (units)
Input Value
SoilNHEM
NHEM industrial risk-based chemical concentration
								in soil/ sediment (mg/kg)
--
TR
Target excess individual lifetime cancer risk
								(unitless)
10-5
SFo
Oral cancer slope factor
								((mg/kg-day)-1)
CSa
SFi
Inhalation cancer slope factor
								((mg/kg-day)-1)
CSa
BWa
Average adult body weight (kg)
70b
ATc
Averaging time -carcinogens (yr)
70b
EFi
Industrial exposure frequency (days/yr)
250b
EDi
Industrial exposure duration (yr)
25b
IRSi
Industrial soil ingestion rate (mg/day)
50b
IRAa
Adult inhalation rate
								(m3/day)
20c
VFi
Industrial soil-to-air volatilization factor
								(m3/kg)
CSd
SAi
Skin surface area for an industrial worker
								(cm2/day)
3,300c
AFi
Soil-to-skin adherence factor for an industrial
								worker (mg/cm2)
0.2c
ABS
Dermal absorption factor (unitless)
CSc
a Chemical-specific; refer to
					 EPA's Integrated Risk Information System (
http://www.epa.gov/iris/subst/index.html
)
					 or other appropriate EPA reference.
b
Soil Screening
					 Guidance: User's Guide
, EPA 1996.
c
Risk Assessment
					 Guidance for Superfund Volume I Human Health Evaluation Manual (Part E,
					 Supplemental Guidance for Dermal Risk Assessment)
,
					 EPA/540/R-99/005.
d Chemical-specific; refer to
					 EQ5.
e Chemical-specific; refer to
					 Table A-1.
SoilNHEM-Carcinogenic
					 Effects-Inorganic Constituents (mg/kg):
(EQ2)
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					 Image
Parameter
Definition (units)
Input Value
Soil NHEM
NHEM industrial risk-based chemical concentration
								in soil/ sediment (mg/kg)
--
TR
Target excess individual lifetime cancer risk
								(unitless)
10 -5
SF o
Oral cancer slope factor
								((mg/kg-day)-1)
CS b
BW a
Average adult body weight (kg)
70 b
AT c
Averaging time - carcinogens (yr)
70 b
EF i
Industrial exposure frequency (days/yr)
250 b
ED i
Industrial exposure duration (yr)
25 b
IRS i
Industrial soil ingestion rate (mg/day)
50 b
SA i
Skin surface area for an industrial worker
								(cm2/day)
3,300 c
AF i
Soil-to-skin adherence factor for an industrial
								worker (mg/cm2)
0.2 c
ABS
Dermal absorption factor (unitless)
CS d
a Chemical-specific; refer to
					 EPA's Integrated Risk Information System (
http://www.epa.gov/iris/subst/index.html
)
					 or other appropriate EPA reference.
b
Soil Screening
					 Guidance: User's Guide
, EPA 1996.
c
Risk Assessment
					 Guidance for Superfund Volume I Human Health Evaluation Manual (Part E,
					 Supplemental Guidance for Dermal Risk Assessment),
EPA/540/R-99/005.
d Chemical-specific; refer to
					 EQ5.
e Chemical-specific; refer to
					 Table A-1.
SoilNHEM-Noncarcinogenic
					 Effects-Organic Constituents (mg/kg):
(EQ3)
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					 Image
Parameter
Definition (units)
Input Value
SoilNHEM
NHEM industrial risk-based chemical concentration
								in soil/ sediment (mg/kg)
--
THQ
Target hazard quotient (unitless)
10
RfDo
Oral reference dose (mg/kg-day)
CSa
RfDi
Inhalation reference dose (mg/kg-day)
CSa
BWa
Average adult body weight (kg)
70b
ATni
Averaging time-noncarcinogens, industrial (yr)
25b
EFi
Industrial exposure frequency (days/yr)
250b
EDi
Industrial exposure duration (yr)
25b
IRSi
Industrial soil ingestion rate (mg/day)
50b
IRAa
Adult inhalation rate
								(m3/day)
20c
VFi
Industrial soil-to-air volatilization factor
								(m3/kg)
CSd
SAi
Skin surface area for an industrial worker
								(cm2/day)
3,300c
AFi
Soil-to-skin adherence factor for an industrial
								worker (mg/cm2)
0.2c
ABS
Dermal absorption factor (unitless)
CSc
a Chemical-specific; refer to
					 EPA's Integrated Risk Information System (
http://www.epa.gov/iris/subst/index.html
)
					 or other appropriate EPA reference.
b
Soil Screening
					 Guidance: User's Guide
, EPA 1996.
c
Risk Assessment
					 Guidance for Superfund Volume I Human Health Evaluation Manual (Part E,
					 Supplemental Guidance for Dermal Risk Assessment)
,
					 EPA/540/R-99/005.
d Chemical-specific; refer to
					 EQ5.
e Chemical-specific; refer to
					 Table A-1.
SoilNHEM-Noncarcinogenic
					 Effects-Inorganic Constituents (mg/kg):
(EQ4)
Click Here To View
					 Image
Parameter
Definition (units)
Input Value
SoilNHEM
NHEM industrial risk-based chemical concentration
								in soil/ sediment (mg/kg)
--
THQ
Target hazard quotient (unitless)
10
RfDo
Oral reference dose (mg/kg-day)
CSa
BWa
Average adult body weight (kg)
70b
ATni
Averaging time - noncarcinogens, industrial (yr)
70b
EFi
Industrial exposure frequency (days/yr)
250b
EDi
Industrial exposure duration (yr)
25b
IRSi
Industrial soil ingestion rate (mg/day)
50b
SAi
Skin surface area for an industrial worker
								(cm2/day)
3,300c
AFi
Soil-to-skin adherence factor for an industrial
								worker (mg/cm2)
0.2c
ABS
Dermal absorption factor (unitless)
CSd
a Chemical-specific; refer to
					 EPA's Integrated Risk Information System (
http://www.epa.gov/iris/subst/index.html
)
					 or other appropriate EPA reference.
b
Soil Screening
					 Guidance: User's Guide
, EPA 1996.
c
Risk Assessment
					 Guidance for Superfund Volume I Human Health Evaluation Manual (Part E,
					 Supplemental Guidance for Dermal Risk Assessment)
,
					 EPA/540/R-99/005.
d Chemical-specific; refer to
					 EQ5.
e Chemical-specific; refer to
					 Table A-1.
VFi-Volatilization Factor-Organic
					 Constituents (m3/kg):
(EQ5)
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					 Image
where:
(EQ6)
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					 Image
Parameter
Definition (units)
Input Value
VFi
Industrial soil-to-air volatilization factor
								(m3/kg)
--
DA
Apparent diffusivity
								(cm2/s)
--
Q/C
Inverse of the mean concentration at the center of
								source (g/m2-s per kg/m3)
79.25
T
Exposure interval -industrial (s)
7.9E+08a
p
b
Dry soil bulk density
								(g/cm3)
1.7b
[THETA]
a
Air-filled soil porosity
								(Lair/Lsoil)
n-
[THETA]
w
n
Total soil porosity
								(Lpore/Lsoil)
1 -
								(
p
b/
p
s)
[THETA]
w
Water-filled soil porosity
								(Lwater/Lsoil)
0.21b
p
s
Soil particle density
								(g/cm3)
2.65b
Di
Diffusivity in air
								(cm2/s)
CSc
H'
Henry's Law Constant (dimensionless)
CSc,d
Dw
Diffusivity in water
								(cm2/s)
CSc
Kd
Soil-water partition coefficient
								(cm3/g) = Koc x
								foc
CSc
Koc
Soil organic carbon partition coefficient
								(cm3/g)
CSc
foc
Fractional organic carbon in soil (g/g) = percent
								organic matter/174 (ASTM 2974)
0.006b
a
Soil Screening
					 Guidance: User's Guide
, EPA 1996.
b LDEQ default value.
c Chemical-specific.
d H' = H x 41 where: H =
					 Henry's Law Constant (atm-m3/mol); R = Universal Law
					 Constant (0.0000821 atm-m3/mole-
					 oK); and T = Absolute temperature of soil
					 (oK) [273 + oC
					 (25oC)].
Table A-1
Dermal Absorption Factors
								1
Constituent
ABS (unitless)
Arsenic
0.03
Cadmium
0.001
Chlordane
0.04
2,4-D
0.05
DDT
0.03
Gamma-hexachlorocyclohexane
0.04
TCDD
0.03
Pentachlorophenol
0.25
Polychlorinated biphenyls
0.14
Polycyclic aromatic hydrocarbons
0.13
Other semivolatile organic constituents
0.10
Other inorganic constituents (metals)
0
Volatile constituents
0
1
Risk Assessment
					 Guidance for Superfund Volume I: Human Health Evaluation Manual (Part E,
					 Supplemental Guidance for Dermal Risk Assessment)
, Interim Guidance.
					 EPA 2004. EPA/540/R-99/005.
GWNHEM-Carcinogenic
					 Effects-Volatile Constituents (mg/l):
(EQ7)
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					 Image
Parameter
Definition (units)
Input Value
GWNHEM
NHEM chemical concentration in groundwater (mg/l)
--
TR
Target excess individual lifetime cancer risk
								(unitless)
10-5
SFo
Oral cancer slope factor
								((mg/kg-day)-1)
CSa
SFi
Inhalation cancer slope factor
								((mg/kg-day)-1)
CSa
ATc
Averaging time -carcinogens (yr)
70b
EFni
Industrial exposure frequency (days/yr)
350b
IRWadj
Age-adjusted water ingestion rate (L-yr/kg-day)
1.1b
IRAadj
Age-adjusted inhalation rate
								(m3-yr/kg-day)
11b
Kw
Water-to-indoor air volatilization factor
								(L/m3)
0.5c,d
DF
Dilution and Attenuation Factor (unitless)
100c
a Chemical-specific: refer to
					 EPA's Integrated Risk Information System (
http://www.epa.gov/iris/subst/index.html
)
					 or other appropriate EPA reference.
b Human Health Medium-Specific
					 Screening Levels, EPA Region VI, 2003.
c
Risk Assessment
					 Guidance for Superfund Volume I Human Health Evaluation Manual (Part B,
					 Development of Risk-Based Preliminary Remedial Goals)
, EPA
					 1991.
d The water-air concentration
					 relationship represented by the volatilization factor
					 (Kw) is applicable only to chemicals with a Henry's Law
					 Constant of greater than 1E-05 atm-m3/mole and a
					 molecular weight of less than 200 g/mole.
GWNHEM-Noncarcinogenic
					 Effects-Volatile Constituents (mg/l):
(EQ8)
Click Here To View
					 Image
Parameter
Definition (units)
Input Value
GWNHEM
NHEM chemical concentration in groundwater (mg/l)
--
THQ
Target hazard quotient (unitless)
10
RfDi
Inhalation reference dose (mg/kg-day)
CSa
RfDo
Oral reference dose (mg/kg-day)
CSa
BWa
Average adult body weight (kg)
70b
ATnni
Averaging time -noncarcinogens, non-industrial
								(yr)
30b
EFni
Non-industrial exposure frequency (days/yr)
350b
EDni
Industrial exposure duration (yr)
30b
IRWa
Adult water ingestion rate (L/day)
20b
IRAa
Adult inhalation rate
								(m3/day)
20b
Kw
Water-to-indoor air volatilization factor
								(L/m3)
0.5c,d
DF
Dilution Factor (unitless)
100
a Chemical-specific: refer to
					 EPA's Integrated Risk Information System (
http://www.epa.gov/iris/subst/index.html
)
					 or other appropriate EPA reference.
b Human Health Medium-Specific
					 Screening Levels, EPA Region VI, 2003.
c
Risk Assessment
					 Guidance for Superfund Volume I Human Health Evaluation Manual (Part B,
					 Development of Risk-Based Preliminary Remedial Goals)
, EPA
					 1991.
d The water-air concentration
					 relationship represented by the volatilization factor
					 (Kw) is applicable only to chemicals with a Henry's Law
					 Constant of greater than 1E-05 atm-m3/mole and a
					 molecular weight of less than 200 g/mole.
GWNHEM-Carcinogenic
					 Effects-Non-Volatile Constituents (mg/l):
(EQ9)
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					 Image
Parameter
Definition (units)
Input Value
GWNHEM
NHEM chemical concentration in groundwater (mg/l)
--
TR
Target excess individual lifetime cancer risk
								(unitless)
10-5 a
SFo
Oral cancer slope factor
								((mg/kg-day)-1)
CSb
ATc
Averaging time -carcinogens (yr)
70a
EFni
Non-industrial exposure frequency (days/yr)
350a
IRWadj
Age-adjusted water ingestion rate (L-yr/kg-day)
1.1a
DF
Dilution Factor (unitless)
100
a Chemical-specific; refer to
					 EPA's Integrated Risk Information System (
http://www.epa.gov/iris/subst/index.html
)
					 or other appropriate EPA reference.
b Human Health Medium-Specific
					 Screening Levels, EPA Region VI, 2003.
GWNHEM-Noncarcinogenic
					 Effects-Non-Volatile Constituents (mg/l):
(EQ10)
Click Here To View
					 Image
Parameter
Definition (units)
Input Value
GWNHEM
NHEM chemical concentration in groundwater (mg/l)
--
THQ
Target hazard quotient (unitless)
10
RfDo
Oral reference dose (mg/kg-day)
CSa
BWa
Average adult body weight (kg)
70b
ATnni
Averaging time -noncarcinogens, non-industrial
								(yr)
30b
EFni
Non-industrial exposure frequency (days/yr)
350b
EDni
Non-industrial exposure duration (yr)
30b
IRWa
Adult water ingestion rate (L/day)
2b
DF
Dilution Factor (unitless)
100
a Chemical-specific; refer to
					 EPA's Integrated Risk Information System (
http://www.epa.gov/iris/subst/index.html
) or
					 other appropriate EPA reference.
b Human Health Medium-Specific
					 Screening Levels, EPA Region VI, 2003.