Source: http://www.pacode.com/secure/data/025/chapter250/subchapCtoc.html
Timestamp: 2016-06-27 14:50:56
Document Index: 800384247

Matched Legal Cases: ['§ 250', '§ 250', '§ 6026', '§ 250', '§ 250', '§ 6026', '§ 109', '§ 250', '§ 250', '§ 6026', '§ 250', '§ 250', '§ 250', '§ 250', '§ 250', '§ 250', '§ 250', '§ 6026', '§ 250', '§ 250', '§ 250', '§ 250', '§ 250', '§ 250', '§ 6026', '§ 250', '§ 250', '§ 250']

(b) This subchapter sets forth generic Statewide health standards for regulated substances determined by the EPA to be mutagens. Tables 14 contain Statewide health standards based upon the methodology for mutagens in § § 250.306 and 250.307 (relating to ingestion numeric values; and inhalation numeric values) for the following substances classified as mutagens: Regulated Substance CAS Number Benzo[a]anthracene 56-55-3 Benzidine 92-87-5 Benzo[a]pyrene 50-32-8
Benzo[b]fluoranthene 205-99-2 Benzo[k]fluoranthene 207-08-9 Chrysene 218-01-9 Dibenzo[a,h]anthracene 53-70-3 Dibromo-3-chloropropane, 1,2- 96-12-8
Indeno[1,2,3-cd]pyrene 193-39-5 Methylene bis(2-chloroaniline), 4,4'- 101-14-4 Nitrosodiethylamine, N- 55-18-5 Nitrosodimethylamine, N- 62-75-9
Nitroso-N-ethylurea, N- 759-73-9 Vinyl chloride 75-01-4
The provisions of this § 250.301 amended under sections 104(a) and 303(a) of the Land Recycling and Environmental Remediation Standards Act (35 P. S. § § 6026.104(a) and 6026.303(a)).
The provisions of this § 250.301 amended January 7, 2011, effective January 8, 2011, 41 Pa.B. 230. Immediately preceding text appears at serial page (285763).
(i) The municipal authority or political subdivision demonstrates that the requirements of subsection (c) are met in the specific geographic area. (ii) Municipal ordinances are in effect that prohibit the use of groundwater from wells or springs for drinking water or agricultural purposes.
The provisions of this § 250.303 amended under sections 104(a) and 303(a) of the Land Recycling and Environmental Remediation Standards Act (35 P. S. § § 6026.104(a) and 6026.303(a)).
(c) The MSCs for regulated substances contained in groundwater in aquifers used or currently planned to be used for drinking water or for agricultural purposes is the MCL as established by the Department or the EPA as established in § 109.202 (relating to state MCLs, MRDLs and treatment technique requirements) and Health Advisory Levels (HALs) set forth in Drinking Water Standards and Health Advisories, EPA Office of Water Publication No. EPA 822-R-09-011 (October, 2009). For a regulated substance where no MCL has been established, the MSC is the lifetime HAL for that compound. For a regulated substance where neither an MCL nor a lifetime HAL has been established, the MSC is the lowest concentration calculated using the appropriate residential and nonresidential exposure assumptions and the equations in § § 250.306 and 250.307 (relating to ingestion numeric values; and inhalation numeric values). New or revised MCLs or HALs promulgated by the Department or the EPA shall become effective immediately for any demonstration of attainment completed after the date the new or revised MCLs or HALs become effective.
(5) For regulated substances with no calculated attenuation factor because of a lack of data in Howard, P. H., R. S. Boethling, W. F. Jarais, W. M. Meylan and E. M. Michalenko. 1991. Handbook of Environmental Degradation Rates. Lewis Publishers, Inc., Chelsea, MI., the appropriate residential or nonresidential MSC for groundwater in aquifers used or currently planned to be used containing less than 2,500 mg/l total dissolved solids.
K = degradation coefficient = 0.693
KOCorganic carbon partitioning coefficient (See Appendix A Table 5).
(f) In addition to the requirements in this section, the MSCs are further limited by solubility as identified in Appendix A, Table 5. The solubility limits are derived from the references in subsection (g), which are keyed to the numbers in Table 5. The following procedure was used to determine the appropriate solubility value for each regulated substance: where multiple sources are cited in Table 5, the value for the solubility limit is the median of the values in the indicated references.
(4) Howard, P. H. 1991. Handbook of Environmental Fate and Exposure Data for Organic Chemicals. Vol. III Pesticides, Lewis Publishers. (5) Verschueren, K. 1977, Handbook of Environmental Data on Organic Chemicals, Van Nostrand Reinhold.
(10) EPA. 1994, Superfund Chemical Data Matrix. Office of Solid Waste and Emergency Response, EPA 540-R-94-009.
The provisions of this § 250.304 amended under sections 104(a) and 303(a) of the Land Recycling and Environmental Remediation Standards Act (35 P. S. § § 6026.104(a) and 6026.303(a)).
The provisions of this § 250.304 amended November 23, 2001, effective November 24, 2001, 31 Pa.B. 6395; amended January 7, 2011, effective January 8, 2011, 41 Pa.B. 230. Immediately preceding text appears at serial pages (285766) to (285768).
where: [rho ]rs = density of the regulated substance = 1.0 kg/L n = porosity of the soil = 0.35 [rho ]B = dry bulk density of the soil = 1.8 kg/L Sr = residual saturation ratio (substance vol./soil vol.) = 0.051
(ii) The inhalation numeric value throughout the soil column to a depth of up to 15 feet in soil from the existing ground surface, which considers volatilization into the outdoor air and inhalation of particulates, as determined by the methodology in § 250.307 (relating to inhalation numeric values), using the appropriate default residential exposure assumptions contained in § 250.307(d). (iii) The soil-to-groundwater pathway numeric value throughout the entire soil column as determined by the methodology in § 250.308 (relating to soil to groundwater pathway numeric values).
(ii) A soil-to-groundwater pathway equivalency demonstration as identified in § 250.308(d). (f) The MSC for regulated substances contained in soil at depths greater than 15 feet is one of the following:
(2) For regulated substances identified as a mutagen, except for vinyl chloride, in § 250.301(b):
ResidentialNonresidential
TermSystemic1Carcinogens2,6(Onsite Worker) THQTarget Hazard Quotient1N/A1 RfDoOral Reference Dose (mg/kg-day)Chemical-specificN/AChemical-specific
BWBody Weight (kg) Soil Groundwater 1570N/A 7070 ATncAveraging Time for systemic toxicants (yr) Soil Groundwater 630 N/AN/A 2525
AbsAbsorption (unitless)3111 EFExposure Frequency (d/yr) Soil Groundwater 250350 250350 180250
EDExposure Duration (yr) Soil Groundwater 630 N/AN/A 2525
IngRIngestion Rate Soil (mg/day) GW (L/day) 1002 N/AN/A 501
CFConversion Factor Soil (kg/mg) GW (unitless) 1 x 10-61 1 x 10-61 1 x 10-61 TRTarget RiskN/A1 x 10-51 x 10-5 CSFOOral Cancer Slope Factor (mg/kg-day)-1N/AChemical-specificChemical-specific
ATCAveraging Time for carcinogens (yr)N/A7070
Ifadj4Ingestion Factor Soil (mg-yr/kg-day) GW (L-yr/kg-day)N/A 57.1 1.1 17.9 0.4
AIFadj5Combined Age-Dependent Adjustment Factor and Ingestion Factor Soil (mg-yr/kg-day) GW (L-yr/kg-day)N/A 2453.39N/A
Notes: 1Residential exposure to noncarcinogens is based on childhood (ages 1-6) exposure for soil, and adult exposure for groundwater, consistent with USEPA (1991). 2Residential exposure to carcinogens is based on combined childhood and adult exposure.3The oral absorption factor takes into account absorption and bioavailability. In cases where the oral RfD or CSF is based on administered oral dose, the absorption factor would be limited to bioavailability. The default value is 1. 4The Ingestion Factor for the residential scenario is calculated using the equation Ifadj = EDc x IRc/BWc + EDa x IRa/Bwa, where EDc = 6 yr, IRc = 100 mg/day for soils and 1 L/day for groundwater, BWc = 15 kg, EDa = 24 yr, IRa = 50 mg/day for soils and 2 L/day for groundwater, and BWa = 70 kg. The ingestion factor for the nonresidential scenario is calculated using the equation Ifadj = ED x IR/BW, where ED = 25 yr, IR = 50 mg/day for soils and 1 L/day for groundwater, and BW = 70 kg. 5The Combined Age-Dependent Adjustment Factor and Ingestion Factor (AIFadj) for the residential scenario is calculated using the equation AIFadj = [(ADAF2 x ED2) + (ADAF2-6 x ED 2-6)] x IRc / BWc + [(ADAF6-16 x ED6-16) + (ADAF16 x ED6-16)] x IRa / BWa, where ADAF2 = 10, ED 2 = 2 yr, ADAF2-6 = 3, ED2-6 = 4 yr, IRc = 100mg/day for soils and 1 L/day for groundwater, BWc = 15 kg, ADAF6-16 = 3, ED6-16 = 10 yr, ADAF16 = 1, ED16 = 14 yr, IRa = 50 mg/day for soils and 2 L/day for groundwater, and BWa = 70 kg.6For the equation to calculate the vinyl chloride residential MSC based on the carcinogenic effect, IRc = 100 mg/day for soils and 1 L/day for groundwater, BWc = 15 kg.
(e) The residential ingestion numeric value for lead in soil was developed using the Uptake Biokinetic (UBK) Model for Lead (version 0.4) developed by the EPA (U. S. Environmental Protection Agency. (1990). Uptake Biokinetic (UBK) Model for Lead (version 0.4). U. S. EPA/ECAO. August 1990, in lieu of the algorithms presented in subsections (a) and (b). Default input values are identified in Appendix A, Table 7. Because the UBK model is applicable only to children, the nonresidential ingestion numeric value was calculated according to the method developed by the Society for Environmental Geochemistry and Health (Wixson, B. G. (1991)). The Society for Environmental Geochemistry and Health (SEGH) Task Force Approach to the Assessment of Lead in Soil. Trace Substances in Environmental Health. (11-20), using the following equations:
The provisions of this § 250.306 issued under sections 104(a) and 303(a) of the Land Recycling and Environmental Remediation Standards Act (35 P. S. § § 6026.104(a) and 6026.303(a)).
The provisions of this § 250.306 amended January 7, 2011, effective January 8, 2011, 41 Pa.B. 230; corrected March 19, 2011, effective March 5, 2011, 41 Pa.B. 1458; corrected May 16, 2014, effective March 5, 2011, 44 Pa.B. 2975. Immediately preceding text appears at serial pages (356272) to (356274).
This section cited in 25 Pa. Code § 250.304 (relating to MSCs for groundwater); 25 Pa. Code § 250.305 (relating to MSCs for soil); and 25 Pa. Code § 250.310 (relating to minimum threshold MSCs).
(a) For a regulated substance which is a systemic toxi- cant, the following applies:
(3) For a regulated substance identified in § 250.301(b) (relating to scope) as a mutagen, except for vinyl chloride, the numeric value for inhalation from soil was calculated using the appropriate residential or nonresidential exposure assumptions from subsection (d) according to the following equation using the TF for volatiles:
(4) For vinyl chloride, the numeric value for inhalation from soil was calculated using the appropriate residential or nonresidential exposure assumptions from subsection (d) according to the following equation using the TF for volatiles:
TermSystemic1Carcinogens2(Onsite Worker) THQTarget Hazard Quotient1N/A1 RfCiInhal. Reference Concentration (mg/m3)Chemical-specificN/AChemical-specific
ATncAveraging Time for systemic toxicants (yr)30N/A25 TFTransport Factor (mg/kg)/(mg/m3) Volatilization3 Particulate4 Chemical-specific1 x 1010 Chemical-specific1 x 1010 Chemical-specific1 x 1010 ETExposure Time (hr/day)24248
EFExposure Frequency5 (d/yr)250250180
EDExposure Duration (yr)30N/A25
CFConversion Factor1,000 µg/mg 1,000 µg/mg 1,000 µg/mg TRTarget RiskN/A1 x 10-51 x 10-5 IURInhalation Unit Risk (µg/m3)-1 N/AChemical-specificChemical-specific
ATcAveraging Time for carcinogens (yr)N/A7070 AEDCombined Age-Dependent Adjustment Factor and Exposure Duration (yr)6N/A76N/A
Notes: Modified from USEPA Region III Risk-based Concentration Table, dated October 20, 1995.N/A = Not Applicable 1Residential exposure to systemic toxicants is based on adult exposure, consistent with USEPA (1991).2Residential exposure to carcinogens is based on combined child and adult exposure. 3Volatilization transport factor is calculated using TF = (ER x DF)-1, where DF = 12 (mg/m3)/(m2-sec). See soil depth-specific algorithm for the calculation of ER. 4Particulate transfer factor was calculated using TF = (ER x DF)-1, where ER = 8.25 x 10-12 (mg/m2-sec)/(mg/kg) and DF = 12(mg/m3)/(mg/m2-sec). 5Assumes approximately 100 days/yr with the ground being frozen. Exposure to surficial soils when the ground is frozen is considered de minimis. The nonresidential exposure frequency is defined as 5/7 x 250 days/yr. 6The Combined Age-Dependent Adjustment Factor and Exposure Duration (AED) is calculated using the equation AED = ADAF2 x ED2 + ADAF2-16 x ED2-16 + ADAF16 x ED16, where ADAF2 = 10, ED2 = 2 yr, ADAF2-16 = 3, ED2-16 = 14 yr, ADAF16 = 1, ED16 = 14 yr.
ParameterDefinitionUnitRecommended Value(1)
ERChemical vapor emission rate from surface soil or subsurface soilmg/m2-sec per mg/kgChemical-specific
CoChemical concentration in soil, Co = CS[rho ]bg/m31.8 CSChemical concentration in soilmg/kg (ppm)1 DEEffective diffusion coefficientm2/secChemical-specific DaiAir diffusivity for chemical im2/secChemical-specific
DLiWater diffusivity for chemical im2/secChemical-specific tTimesecN/A
TEmission averaging timesecEqual to exposure duration
[thgr ]Total soil porosity, [thgr ] = [thgr ]a + [thgr ]mcm3/cm30.32(2) [thgr ]aAir-filled soil porositycm3/cm30.12(2)
[thgr ]mMoisture-filled soil porosity, [thgr ]m = w[rho ]bcm3/cm30.20(2) wMoisture content for soilg water/g soil0.11 [rho ]bDry bulk density of soil, [rho ]b = (1-[thgr ]) [rho ]g/cm31.8(2)
[rho ]Soil particle densityg/cm32.65
KdPartition coefficient, Kd = Kocfoccm3/gChemical-specific HHenrys Law constant dimensionlessChemical-specific DGEffective gas-phase diffusion coefficientm2/secChemical-specific
DLeffective liquid-phase diffusion coefficientm2/secChemical-specific LDepth of the contaminated surface soilm0.6(3) lDepth of the clean soil coverm0.6(3) WThickness of the contaminated subsurface soilm4.0(3) KOCOrganic carbon partition coefficient for chemical icm3/gChemical-specific fOCFraction of organic carbon in soildimensionless0.005(4)
(Editors Note: The Department of Environmental Protection notes that the numerator of the equation in subsection (g)(1) should be TR x ATc x 365 days/year x 24 hr/day. See the proposed rulemaking published at 44 Pa.B. 2980, 2985 (May 17, 2014).)
TermSystemic1Carcinogens2(Onsite Worker) THQTarget Hazard Quotient1N/A1 RfCiInhal. Reference Concentration (mg/m3)Chemical-specificN/AChemical-specific ATncAveraging Time for systemic toxicants (yr)30N/A25 ETExposure Time (hr/day)24248 EFExposure Frequency (d/yr)350350250 EDExposure Duration (yr)303025 TFTransfer Factor (L/m3)30.50.50.5 CFConversion FactorN/A1,000 µg/mg1,000 µg/mg
TRTarget RiskN/A1 x 10-51 x 10-5 IURInhalation Unit Risk (µg/m3)-1N/AChemical-specificChemical-specific ATcAveraging Time for carcinogens (yr)N/A7070
AEDCombined Age-Dependent adjustment Factor and Exposure Duration (yr)4N/A76N/A (Footnotes on next page)
Notes: Modified from USEPA Region III Risk-based Concentration Table, dated October 20, 1995. N/A = Not Applicable 1Residential exposure to systemic toxicants is based on adult exposure, consistent with USEPA (1991). 2Residential exposure to carcinogens is based on combined child and adult exposure. 3Default Transfer Factor is as presented in USEPAs RAGS, Part B.4The Combined Age-Dependent Adjustment Factor and Exposure Duration (AED) is calculated using the equation AED = ADAF2 x ED2 + ADAF2-16 x ED2-16 + ADAF16 x ED16 where ADAF2 = 10, ED2 = 2 yr, ADAF2-16 = 3, ED2-16 = 14 yr, ADAF16 = 1, ED16 = 14 yr. Authority
The provisions of this § 250.307 issued under sections 104(a) and 303(a) of the Land Recycling and Environmental Remediation Standards Act (35 P. S. § § 6026.104(a) and 6026.303(a)).
The provisions of this § 250.307 amended January 7, 2011, effective January 8, 2011, 41 Pa.B. 230; corrected March 19, 2011, effective March 5, 2011, 41 Pa.B. 1458; corrected May 16, 2014, effective March 5, 2011, 44 Pa.B. 2975. Immediately preceding text appears at serial pages (356274) to (356284).
This section cited in 25 Pa. Code § 250.304 (relating to MSCs for groundwater); and 25 Pa. Code § 250.305 (relating to MSCs for soil).
MSCS = MSCGW ((Koc * foc) + [thgr ]w/[rho ]b) DF
[thgr ]w = water-filled porosity of soil (default value = 0.2)
[rho ]b (kg/L) = dry bulk density of soil (default value = 1.8 kg/l)
MSCS = MSCGW (Kd + [thgr ]w/[rho ]b) DF
[thgr ]W = water-filled porosity (default value = 0.2)
(1) Fate and transport analysis of the regulated substance from the deepest point of contamination in the soil through unsaturated zone soil and shall include the use of soil-to-water partition coefficients. The analysis shall demonstrate that the regulated substances will not migrate to bedrock or the groundwater within 30 years at concentrations exceeding the greater of the groundwater MSC or background in groundwater as the endpoint in soil pore water directly under the site. (2) In addition to sampling required for attainment of the inhalation or ingestion numeric values for soils up to 15 feet, as applicable, reporting and monitoring for eight quarters that shows no exceedances of the greater of the groundwater MSCs or of the background standard for groundwater beneath the contaminated soil and no indications of an increasing trend of concentration over time that may exceed the standard.