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COMMONWEALTH OF PENNSYLVANIA

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Pennsylvania Code



Subchapter G. DEMONSTRATION OF ATTAINMENT


Sec.


250.701.    Scope.
250.702.    Attainment requirements.
250.703.    General attainment requirements for soil.
250.704.    General attainment requirements for groundwater.
250.705.    Attainment requirements for groundwater in aquifers not used or currently planned to be used.
250.706.    Demonstration of attainment of surface water and air quality standards.
250.707.    Statistical tests.
250.708.    Postremediation care attainment.

Cross References

   This subchapter cited in 25 Pa. Code §  245.310 (relating to site characterization report); 25 Pa. Code §  245.313 (relating to remedial action completion report); 25 Pa. Code §  250.202 (relating to establishing background concentrations); 25 Pa. Code §  250.204 (relating to final report); and 25 Pa. Code §  250.405 (relating to when to perform a risk assessment).

§ 250.701. Scope.

 (a)  This subchapter specifies the information and procedures necessary to demonstrate attainment with one or a combination of the background standard, Statewide health standard, site-specific standard and the minimum threshold standard, when a release of a regulated substance has occurred.

 (b)  This subchapter applies to persons who undertake a remediation in accordance with the act and this chapter.

 (c)  For purposes of determining attainment of one or a combination of remediation standards, the concentration of a regulated substance is not required to be less than the limits relating to the PQLs for a regulated substance in accordance with §  250.4 (relating to limits related to PQLs).

 (d)  Attainment of a standard shall be demonstrated at the point of compliance, as identified in §  250.203, 250.302 or 250.407 (relating to point of compliance), whichever is applicable.

§ 250.702. Attainment requirements.

 (a)  Attainment of a standard shall be demonstrated with adherence to Data Quality Objectives (DQO) and Data Quality Assessment (DQA) processes as specified by the EPA, as appropriate. Attainment of the Statewide health or site-specific standard will apply to the vertical and horizontal extent of soil identified as contaminated from the release of a regulated substance above the selected standard and of groundwater at the point of compliance and beyond in a site characterization. Attainment of the background standard will apply to the vertical and horizontal extent of soil and water identified as contaminated from the release across the site. Where multiple releases occur on a property which produce distinctly separate zones of contamination, the characterization and subsequent attainment demonstrations apply individually to the separate zones.

 (b)  Demonstration of attainment in a final report shall include the following:

   (1)  A demonstration that the analysis of the data, through the application of statistical tests provided for in §  250.707 (relating to statistical tests), indicates that the standard has been met.

   (2)  For groundwater, a demonstration of a statistical time trend analysis, knowledge of the plume stability or other acceptable method that shows contaminant concentration at the point of compliance will not exceed the selected standard. A statistical analysis shall be applied that indicates continued attainment of the standard.

   (3)  For the site-specific standard, the following apply:

     (i)   If pathway elimination is part of the remediation, it shall be demonstrated on the basis of either an engineering or hydrogeologic analysis, or both, which includes fate and transport analysis that some or all of the exposure pathways have been eliminated.

     (ii)   If pathway elimination is not part of the remediation or it cannot be demonstrated that all pathways have been eliminated, it shall be demonstrated that the calculated numerical site-specific standards for the remaining pathways have been attained in accordance with paragraphs (1) and (2), using the procedures in §  250.707(c) and (d), or that the risk level remaining at a site does not exceed a risk level of 1 x 10-4 and a hazard index of 1, provided for in the act. If separate phase liquids are present, it shall also be demonstrated that calculated site-specific numeric standards are attained within the soil and groundwater directly impacted by the separate phase liquids when those numeric standards are associated with exposure to separate phase liquids.

   (4)  For the background and Statewide health standards, if separate phase liquids are present, attainment at the point of compliance shall also be demonstrated within the soil and groundwater directly impacted by separate phase liquids.

Cross References

   This section cited in 25 Pa. Code §  250.707 (relating to statistical tests).

§ 250.703. General attainment requirements for soil.

 (a)  For any standard selected, the attainment demonstration for the soil media shall be made at the point of compliance as defined in Subchapters B—D (relating to background standards; Statewide health standards; and site-specific standards)

 (b)  The soil to which the attainment criteria are applied shall be determined by circumscribing with an irregular surface those concentrations detected during characterization which exceed the selected standard. Where this soil is to be removed from the site, the attainment demonstration applies to the base of the excavation defined by the limit of excavation.

 (c)  Sampling points for demonstration of attainment of soils shall be selected to be random and representative both horizontally and vertically based on a systematic random sampling as set forth in a Department approved reference. If exceedances of a standard occur in a localized area, the Department may require additional characterization and remediation if three or more adjacent samples exceed the standard by more than ten times.

 (d)  For statistical methods under §  250.707(b)(1)(i) (relating to statistical tests), the number of sample points required for each distinct area of contamination to demonstrate attainment shall be determined in the following way:

   (1)  For soil volumes equal to or less than 125 cubic yards, at least eight samples.

   (2)  For soil volumes up to 3,000 cubic yards, at least 12 sample points.

   (3)  For each additional soil volume of up to 3,000 cubic yards, an additional 12 sample points.

   (4)  Additional sampling points may be required based on site-specific conditions.

 (e)  For statistical methods under §  250.707(b)(1)(ii) and (c), the minimum number of samples required for demonstrating attainment shall be as specified by the documentation of the chosen method.

Source

   The provisions of this §  250.703 amended November 23, 2001, effective November 24, 2001, 31 Pa.B. 6395. Immediately preceding text appears at serial pages (233694) to (233695).

Cross References

   This section cited in 25 Pa. Code §  250.707 (relating to statistical tests).

§ 250.704. General attainment requirements for groundwater.

 (a)  For any standard selected, the attainment demonstration for the groundwater media shall be made at the point of compliance as defined in Subchapters B—D (relating to background standards; Statewide health standards; and site-specific standards).

 (b)  A sufficient number and location of monitoring wells necessary to demonstrate attainment of each plume of contamination shall be installed at the point of compliance for each aquifer based on site-specific conditions. Well locations shall be selected to yield an adequate amount of water to produce statistically valid results.

 (c)  In cases where the site characterization has determined the groundwater contamination (plume) extends beyond the property boundary, and the concentration of regulated substances beyond the property is above the cleanup levels of the standard selected, then the location and number of wells shall determine compliance:

   (1)  At and beyond the property boundary.

   (2)  Within the area of property shown, in the site investigation report, to be contaminated with regulated substances above the selected standard.

 (d)  For statistical methods under §  250.707(b)(2)(i) (relating to statistical tests), the demonstration of attainment for groundwater shall be based on at least eight consecutive quarters of groundwater data, which may include characterization data. As an alternative, the Department may accept fewer quarterly sampling events with written approval from the Department under the following conditions:

   (1)  There is adequate spatial monitoring of the plume upgradient which indicates a decreasing concentration trend toward the downgradient property boundary.

   (2)  Parameters affecting the fate and transport of regulated substances within the plume have been fully evaluated.

   (3)  Concentrations of regulated substances in the plume at the point of compliance monitoring wells along the downgradient property boundary are all less than or equal to the groundwater standard or the limit relating to the PQL, whichever is higher, in all samples collected during the quarters of monitoring.

   (4)  One of the following requirements are met:

     (i)   The age of the plume is sufficiently well known to permit a judgment to be made regarding its stability.

     (ii)   The remediation includes source removal or containment actions which would reduce the chemical flux into the plume.

 (e)  For statistical methods under §  250.707(b)(2)(ii) and (c), the minimum number of samples required for demonstrating attainment shall be as specified by the documentation of the chosen method.

Authority

   The provisions of this §  250.704 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)).

Source

   The provisions of this §  250.704 amended January 7, 2011, effective January 8, 2011, 41 Pa.B. 230. Immediately preceding text appears at serial pages (285793) to (285794).

Cross References

   This section cited in 25 Pa. Code §  250.707 (relating to statistical tests).

§ 250.705. Attainment requirements for groundwater in aquifers not used or currently planned to be used.

 In addition to sampling and statistical analyses that apply to attainment of the Statewide health standards for groundwater in this subchapter, attainment of the MSC for aquifers not used or currently planned to be used shall include the following:

   (1)  A scientifically valid and applicable fate and transport analysis, based on sufficient sampling and monitoring data to calibrate the model.

   (2)  Based on the fate and transport analysis in paragraph (1), a demonstration that the MSC for groundwater in an aquifer used or currently planned for use is not exceeded at and beyond all points on a radius of 1,000 feet, downgradient from the property boundary within a period of no more than 30 years.

§ 250.706. Demonstration of attainment of surface water and air quality standards.

 A person shall demonstrate attainment within the surface water and the air media by demonstrating compliance with the applicable State and Federal laws and regulations.

§ 250.707. Statistical tests.

 (a)  For regulated substances which are naturally occurring, the person shall compare the analytical results of background reference samples, that are representative of naturally occurring concentrations of regulated substances on the site, with the analytical results of the medium of concern onsite. For nonnaturally occurring regulated substances for which a known background condition exists, the person shall compare the analytical results of background reference samples, which are related to the migration of contaminants onto the site, with the analytical results of the medium of concern onsite. In addition, application of statistical tests for the background standard shall be as follows:

   (1)  Soil. For soil, a person shall use one of the following statistical methods in subparagraphs (i)—(iii) and conditions relating to subparagraphs (i)—(iii) as described in subparagraphs (iv)—(vi) to demonstrate attainment of the background standard:

     (i)   The person shall demonstrate that the highest measurement from the area of concern is not greater than the highest measurement from the background area. The Department may accept insignificant variances in numbers. The minimum number of samples to be collected is ten from the background reference population and ten from each distinct area of contamination.

     (ii)   The Department may accept the use of a combination of the Wilcoxon rank-sum test (equivalent to the Mann-Whitney U test) and the quantile test for data from two populations. The application of these tests shall meet the criteria in subparagraphs (iv) and (vi).

     (iii)   The Department may accept other appropriate statistical methods that meet the requirements of subparagraphs (iv)—(vi).

     (iv)   For nonparametric and parametric methods under subparagraphs (ii) and (iii), the false-positive rate for a set of data applied to a statistical test may not be greater than 0.20. The minimum number of samples to be collected is ten from the background population and ten from each distinct area of contamination.

     (v)   For parametric methods under subparagraph (iii), the censoring level for each nondetect (ND) shall be the assigned value randomly generated that is between zero and the limit related to the PQL.

     (vi)   For nonparametric and parametric methods under subparagraphs (ii) and (iii), the application of a statistical method shall meet the criteria in subsection (d).

   (2)  Groundwater for known upgradient release of a regulated substance.

     (i)   The Department may accept the use of the nonparametric tolerance intervals that are applied in accordance with the procedures in subparagraphs (ii)—(vi) and (viii)—(x).

     (ii)   The upgradient concentration shall be determined by sampling in a background reference well shown on the basis of characterization to exhibit the highest concentration and by demonstrating that the groundwater is representative of concentrations in groundwater that are migrating onto the site.

     (iii)   The background reference well shall be sampled over a period of eight quarters to provide eight samples.

     (iv)   From these eight samples, the highest concentration for each regulated substance shall be selected as the upper tolerance limit.

     (v)   In each onsite well, eight samples shall also be collected during the same eight-quarter period.

     (vi)   The upper tolerance limit shall be met in each onsite well. The maximum of data collected from each onsite well shall be at or below the upper tolerance limit.

     (vii)   In lieu of subparagraphs (iv)—(vi), the Department may accept a retesting strategy using nonparametric prediction limit in accordance with current EPA guidance (EPA, Office of Solid Waste Management Division. ‘‘Statistical Analysis of Groundwater Monitoring Data at RCRA Facilities;’’ Addendum to Interim Final Guidance, EPA, Washington, D. C. June 1992). For each regulated substance, the highest concentration of the eight background reference samples shall be selected as the upper prediction limit, as determined by the most current EPA guidance.

     (viii)   The application of a statistical method for groundwater background standard shall meet the criteria in subsection (d).

     (ix)   For parametric methods, the censoring level for each nondetect (ND) shall be the assigned value randomly generated that is between zero and the limit related to the PQL.

     (x)   In lieu of eight-quarter sampling in subparagraphs (iii) and (v), the Department may allow the eight samples to be taken during a period of four quarters, or less with written approval from the Department if the following criteria can be met:

       (A)   There is adequate spatial monitoring of the plume upgradient of the property on which the release occurred which indicates a stable plume condition.

       (B)   Parameters affecting the fate and transport of regulated substances within the plume have been fully evaluated.

       (C)   Coefficient of variation for the eight samples collected over a 4-quarter period may not exceed 1.0 for metals and 2.0 for organic compounds.

       (D)   The age of the plume is sufficiently well known to permit a judgement to be made regarding its stability and remediation of the souirce associated with the upgradient contamination is not currently or has not recently occurred.

   (3)  Background groundwater conditions due to naturally occurring or areawide contamination.

     (i)   To use this subparagraph for areawide contamination, the person performing remediation shall demonstrate to the Department, in writing, that the site conditions are due to areawide contamination and shall obtain the Department’s approval to use this subsection.

     (ii)   A minimum of 12 samples shall be collected from any combination of monitoring wells, including upgradient locations, if all data collected is used in determination of background concentrations.

     (iii)   The same number of samples shall be collected within and representative of the area of groundwater contamination (plume) onsite as were collected in the upgradient sampling for each sampling event.

     (iv)   The samples from the upgradient wells and the wells in the plume onsite shall be collected during the same sampling event.

     (v)   Sampling may be accelerated so that all sampling events occur in as short a period of time as possible so as not to result in serial correlation in the data.

     (vi)   The resulting values may be used with appropriate nonparametric or parametric methods to compare the two populations.

     (vii)   The sampling results in the plume onsite may not exceed the sum of the background arithmetic average and three times the standard deviation calculated for the background area.

     (viii)   The application of a statistical method for groundwater background standard shall meet the criteria in subsection (d).

     (ix)   For parametric methods, the censoring level for each nondetect (ND) shall be the assigned value randomly generated that is between zero and the limit related to the PQL.

 (b)  The following statistical tests may be accepted by the Department to demonstrate attainment of the Statewide health standard. The statistical test for soil shall apply to each distinct area of contamination. The statistical test for groundwater will apply to each compliance monitoring well. Testing shall be performed individually for each regulated substance identified in the final report site investigation as being present at the site for which a person wants relief from liability under the act. The application of a statistical method must meet the criteria in subsection (d).

   (1)  For soil attainment determination at each distinct area of contamination, subparagraph (i), (ii) or (iii) shall be met in addition to the attainment requirements in § §  250.702 and 250.703 (relating to attainment requirements; and general attainment requirements for soil).

     (i)   Seventy-five percent of all samples, which shall be randomly collected in a single event from the site, shall be equal to or less than the Statewide health standard or the limit related to PQLs with no individual sample exceeding ten times the Statewide health standard.

     (ii)   As applied in accordance with EPA approved methods on statistical analysis of environmental data, as identified in subsection (e), the 95% UCL of the arithmetic mean shall be at or below the Statewide health standard.

     (iii)   For sites with a petroleum release where full site characterization, as defined in §  250.204(b) (relating to final report), has not been done in association with an excavation remediation, attainment of the Statewide health standard shall be demonstrated using the following procedure:

       (A)   For sites regulated under Chapter 245 (relating to administration of the storage tank and spill prevention program) where there is localized contamination as defined in the document ‘‘Closure Requirements for Underground Storage Tank Systems’’ (DEP technical document 2530-BK-DEP2008), samples shall be taken in accordance with that document.

       (B)   For sites not covered by clause (A), including all sites being remediated under an NIR under this chapter, samples shall be taken from the bottom and sidewalls of the excavation in a biased fashion that concentrates on areas where any remaining contamination above the Statewide health standard would most likely be found. The samples shall be taken from these suspect areas based on visual observation and the use of field instruments. If a sufficient number of samples has been collected from all suspect locations and the minimum number of samples has not been collected, or if there are no suspect areas, the locations to meet the minimum number of samples shall be based on a random procedure. The number of sample points required shall be determined in the following way:

         (I)   For 250 cubic yards or less of excavated contaminated soil, five samples shall be collected.

         (II)   For each additional 100 cubic yards of excavated contaminated soil, one sample shall be collected.

         (III)   For excavations involving more than 1,000 cubic yards of contaminated soil, the remediator shall identify the number and locations of samples in a confirmatory sampling plan submitted to the Department. The remediator shall obtain the Department’s approval of the confirmatory sampling plan prior to conducting attainment sampling.

         (IV)   Where water is encountered in the excavation and no obvious contamination is observed or indicated, soil samples collected just above the soil/water interface shall be equal to or less than the applicable Statewide health MSC determined by §  250.308(a)(2)(ii) (relating to soil to groundwater pathway numeric values).

         (V)   Where water is encountered in the excavation and no obvious contamination is observed or indicated, a minimum of two samples shall be collected from the water surface in the excavation.

         (VI)   For sites where there is a release to surface soils resulting in excavation of 50 cubic yards or less of contaminated soil, samples shall be collected as described in this clause, except that two samples shall be collected.

       (C)   All sample results shall be equal to or less than the applicable Statewide health MSC as determined using Tables 1—4 and 6 in Appendix A.

   (2)  For groundwater attainment determination at each compliance monitoring well, subparagraph (i) or (ii) shall be met in addition to the attainment requirements in §  250.702 and §  250.704 (relating to general attainment requirements for groundwater).

     (i)   Seventy-five percent of all samples collected within each monitoring well over time shall be equal to or less than the Statewide health standard or the limit related to PQLs with no individual sample exceeding both of the following:

       (A)   Ten times the Statewide health standard on the property.

       (B)   Two times the Statewide health standard beyond the property boundary.

     (ii)   As applied in accordance with EPA approved methods on statistical analysis of environmental data, as identified in subsection (e), the 95% UCL level of the arithmetic mean shall be at or below the Statewide health standard.

   (3)  In addition to the statistical tests identified in paragraphs (1) and (2), a person may use a statistical test that meets the requirements of subsection (d) to demonstrate attainment.

 (c)  To demonstrate attainment of the site-specific standard, a person may use a statistical test identified in subsection (b)(1)(ii) and (2)(ii) where the 95% UCL of the arithmetic mean is below the site-specific standard or a statistical test that meets the requirements of subsection (d). The attainment test and the methodology used in the risk assessment to evaluate exposure concentrations shall be the same.

 (d)  Except for the statistical methods identified in subsections (a)(1)(i) and (b)(1)(i) and (2)(i), a demonstration of attainment of one or a combination of remediation standards shall comply with the following:

   (1)  When statistical methods are to be used for demonstration of attainment of Statewide health or site-specific standards, the null hypotheses (Ho) shall be that the true site arithmetic average concentration is at or above the cleanup standard, and the alternative hypothesis (Ha) shall be that the true site arithmetic average concentration is below the cleanup standard. When statistical methods are to be used to determine that the background standard is exceeded, the null hypothesis (Ho) shall be that the background standard is achieved and the alternative hypothesis (Ha) shall be that the background standard is not achieved.

   (2)  A statistical method chosen shall comply with the following performance standards:

     (i)   The underlying assumptions of the statistical method shall be met, such as data distribution.

     (ii)   The statistical method shall be recommended for this use in Department-approved guidance or regulation and shall be generally recognized as appropriate for the particular remediation implemented at the site.

     (iii)   Compositing cannot be used with nonparametric methods or for volatile organic compounds.

     (iv)   For parametric methods, the censoring level for each nondetect shall be the assigned value randomly generated that is between zero and the limit related to the PQL.

     (v)   Tests shall account for seasonal and spatial variability as well as temporal correlation of data, unless otherwise approved by the Department.

     (vi)   Tests used to determine that the background standard is exceeded shall maintain adequate power to detect contamination in accordance with current EPA guidances, regulations or protocols.

     (vii)   For the limits relating to the PQLs, Statewide health and site-specific standards, the false-positive rate for a statistical test may not be greater than 0.20 for nonresidential and 0.05 for residential.

     (viii)   Statistical testing shall be done individually for each regulated substance present at the site.

   (3)  The following information shall be documented in a final report when a statistical method is applied:

     (i)   A description of the statistical method.

     (ii)   A clear statement of the applicable decision rule in the form of statistical hypotheses for each spatial unit and temporal boundary including the applicable statistical parameter of interest and the specific cleanup standard.

     (iii)   A description of the underlying assumptions of the method.

     (iv)   Documentation showing that the sample data set meets the underlying assumptions of the method and demonstrating that the method is appropriate to apply to the data.

     (v)   Specification of false positive rates and, in addition for the background standard, specification of false negative rates.

     (vi)   Documentation of input and output data for the statistical test, presented in tables or figures, or both, as appropriate.

     (vii)   An interpretation and conclusion of the statistical test.

 (e)  The references identified in subsection (b)(1)(ii) and (2)(ii) are as follows:

   (1)  EPA, Office of Policy, Planning and Evaluation, Methods for Evaluating the Attainment of Cleanup Standards, Volume 1: Soils and Solid Media, EPA 230/02-89-042, Washington, D. C. 1989.

   (2)  EPA, Office of Solid Waste Management Division, Test Methods for Evaluating Solid Waste, SW-846 Volume II: Field Methods, EPA, November 1985, Third Edition.

   (3)  EPA, Office of Solid Waste Management Division, Statistical Analysis of Groundwater Monitoring Data at RCRA Facilities, Interim Final Guidance, EPA, Washington, D.C., April, 1989.

   (4)  EPA, Office of Solid Waste Management Division, Statistical Analysis of Groundwater Monitoring Data at RCRA Facilities, Addendum to Interim Final Guidance, EPA, Washington, D.C., June, 1992.

   (5)  40 CFR 264 and 265 (relating to standards for owners and operators of hazardous waste treatment, storage, and disposal facilities; and interim status standards for owners and operators of hazardous waste treatment, storage, and disposal facilities).

Authority

   The provisions of this §  250.707 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)).

Source

   The provisions of this §  250.707 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 (285794) to (285801).

Cross References

   This section cited in 25 Pa. Code §  250.702 (relating to attainment requirements); 25 Pa. Code §  250.703 (relating to general attainment requirements for soil); 25 Pa. Code §  250.703 (relating to general attainment requirements for soil); and 25 Pa. Code §  250.704 (relating to general attainment requirements for groundwater).

§ 250.708. Postremediation care attainment.

 (a)  After engineering controls are in place and the groundwater concentration levels have stabilized following any effects from the remediation, a statistical test shall be used to demonstrate that regulated substances in groundwater do not exceed the selected standard at the point of compliance. A statistical trend analysis, knowledge of the plume stability, or other acceptable method shall be used to demonstrate that contaminant concentration at the point of compliance will not exceed the selected standard in the future.

 (b)  If engineering or institutional controls are utilized at a site to maintain the nonresidential Statewide health standard or the site-specific standard, a postremediation care program shall be implemented to protect human health and the environment.

 (c)  A person implementing engineering controls shall ensure the ongoing achievement of the performance standards in order to maintain attainment.

 (d)  A person shall implement a postremediation care plan, as identified in an approved final report.

 (e)  A person may terminate postremediation care as approved in the final report if the person can demonstrate attainment under this chapter without the engineering controls in place, and document a fate and transport analysis that shows the standard will not be exceeded in the future.

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   

   



APPENDIX A




Table 7
DEFAULT VALUES FOR CALCULATING MEDIUM-SPECIFIC CONCENTRATIONS FOR LEAD
Input Values Used in UBK Model for Lead
(for residential exposure scenario)
Geometric Standard Deviation (GSD) 1.42
(default)
Drinking water intake Model
default
Outdoor air lead concentration 0.2 µg/m3 (default) Soil lead level 495 µg/g
Indoor air lead concentration
(% of outdoor)
30 Indoor dust
lead level
495 µg/g
Time spent outdoors Model
default
Soil/dust ingestion weighting factor (%) 45
Ventilation rate Model
default
Paint lead
intake
Model
default
Lung absorption Model
default
Maternal contribution method Infant
model
Dietary lead intake Model
default
Mother’s blood lead at birth 7.5 µg/dL blood
(model default)
GI method/bioavailability Non-linear Target blood lead level 10 µg/dL blood
Lead concentration in drinking water 4.00 µg/L
(default)


Input Values Used in SEGH Equation
(for nonresidential exposure scenario)
Concentration of lead in soil (S) 987 µg/g
Target blood lead level in adults (T) 20 µg/dL blood


Table 7
DEFAULT VALUES FOR CALCULATING MEDIUM-SPECIFIC CONCENTRATIONS FOR LEAD—Continued
Input Values Used in SEGH Equation
(for nonresidential exposure scenario)
Geometric standard deviation of blood lead distribution (G) 1.4
Baseline blood lead level in target population (B) 4 µg/dL blood
Number of standard deviations corresponding to degree
of protection required for the target population (n)
1.645 (for 95% of population)
Slope of blood lead to soil lead relationship ([delta ]) 7.5 µg/dL blood per µg/g soil


REFERENCE

 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.

TABLE 8
CONSTITUENTS OF POTENTIAL ECOLOGICAL CONCERN



METALS ORGANICS
Arsenic III Dichlorobenzene,1,3-
Arsenic V Dichlorobenzene,1,4-
Barium Dieldrin
Beryllium Diethyl phthalate
Cadmium Di-n-butyl phthalate
Chromium III Endosulfan (mixed isomers)
Chromium VI Endosulfan, alpha
Cobalt Endosulfan, beta
Copper Endrin
Iron Ethylbenzene
Lead Fluoranthene
Manganese Fluorene
Mercury, inorganic Heptachlor
Mercury, methyl Hexachloroethane
Molybdenum Hexachlorocyclohexane (Lindane)
Nickel Kepone *
Selenium Malathion
Vanadium Methoxychlor
Zinc Mirex *
Cyanide Naphthalene
Pentachlorobenzene
ORGANICS Pentachlorophenol
Acenaphthene Polynuclear aromatic hydrocarbons
Aldrin * Polychlorinated biphenyls (PCB)
Benzene Phenanthrene
Benzo(a)pyrene Pyrene
Biphenyl Tetrachloroethane,1,1,2,2-
Bis(2-ethylhexyl)phthalate Tetrachloroethylene
Bromophenyl phenyl ether,4- Tetrachloromethane
Butylbenzyl phthalate Toluene
Chlordane * Toxaphene
Chlorobenzene Tribromomethane
DDT (and metabolites) Trichlorobenzene,1,2,4-
Diazinon Trichloroethane,1,1,1-
Dibenzofuran Trichloroethylene
Dichlorobenzene,1,1- Xylenes
Dichlorobenzene,1,2-

Authority

   The provisions of this Appendix A 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)); and section 1920-A of The Administrative Code of 1929 (71 P.S. §  510-20).

Source

   The provisions of this Appendix A amended November 23, 2001, effective November 24, 2001, 31 Pa.B. 6395; amended January 7, 2011, effective January 8, 2011, 41 Pa.B. 230; corrected February 11, 2011, effective January 8, 2011, 41 Pa.B. 840; corrected March 19, 2011, effective March 5, 2011, 41 Pa.B. 1458; corrected May 16, 2014, effective March 5, 2011, 44 Pa.B. 2975; corrected May 30, 2014, effective February 2, 2002, 44 Pa.B. 3235; amended August 26, 2016, effective August 27, 2016, 46 Pa.B. 5655; amended March 16, 2018, effective March 17, 2018, 48 Pa.B. 1503. Immediately preceding text appears at serial pages (382782) to (382836).

Cross References

   This appendix cited in 25 Pa. Code §  250.301 (relating to scope); 25 Pa. Code §  250.304 (relating to MSCs for groundwater); 25 Pa. Code §  250.305 (relating to MSCs for soil); 25 Pa. Code §  250.306 (relating to ingestion numeric values); 25 Pa. Code §  250.308 (relating to soil to groundwater pathway numeric values); 25 Pa. Code §  250.310 (relating to minimum threshold MSCs); 25 Pa. Code §  250.311 (relating evaluation of ecological receptors); 25 Pa. Code §  250.312 (relating to final report); 25 Pa. Code §  250.605 (relating to sources of toxicity information); and 25 Pa. Code §  250.707 (relating to statistical tests).



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