RULES AND REGULATIONS
Title 25—ENVIRONMENTAL PROTECTION
ENVIRONMENTAL QUALITY BOARD
[ 25 PA. CODE CH. 250 ]
Corrective Amendments to 25 Pa. Code Chapter 250, Appendix A, Table 7
[44 Pa.B. 3235]
[Saturday, May 31, 2014]
The Department of Environmental Protection has discovered discrepancies between the agency text of 25 Pa. Code Chapter 250, Appendix A, Table 7, as deposited with the Legislative Reference Bureau, published at 27 Pa.B. 4181 (August 16, 1997), and the official text published in the Pennsylvania Code Reporter (Master Transmittal Sheet No. 327, February 2002). When amendments to 25 Pa. Code Chapter 250, Appendix A adopted at 31 Pa.B. 6395 (November 24, 2001) were codified, Table 7 was inadvertently omitted.
Therefore, under 45 Pa.C.S. § 901: The Department of Environmental Protection has deposited with the Legislative Reference Bureau a corrective amendment to 25 Pa. Code Chapter 250, Appendix A, Table 7. The corrective amendment to 25 Pa. Code Chapter 250, Appendix A, Table 7 is effective as of February 2, 2002, the date the defective official text was announced in the Pennsylvania Bulletin.
The correct version of 25 Pa. Code Chapter 250, Appendix A, Table 7 appears in Annex A.
TITLE 25. ENVIRONMENTAL PROTECTION
PART I. DEPARTMENT OF ENVIRONMENTAL PROTECTION
Subpart D. ENVIRONMENTAL HEALTH AND SAFETY
ARTICLE VI. GENERAL HEALTH AND SAFETY
CHAPTER 250. ADMINISTRATION OF LAND RECYCLING PROGRAM
Subchapter C. STATEWIDE HEALTH STANDARDS
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
Drinking water intake Model
Outdoor air lead concentration 0.2 µg/m3 (default) Soil lead level 495 µg/g Indoor air lead concentration
(% of outdoor)
30 Indoor dust
495 µg/g Time spent outdoors Model
Soil/dust ingestion weighting factor (%) 45 Ventilation rate Model
Lung absorption Model
Maternal contribution method Infant
Dietary lead intake Model
Mother's blood lead at birth 7.5 µg/dL blood
GI method/bioavailability Non-linear Target blood lead level 10 µg/dL blood Lead concentration in drinking water 4.00 µg/L
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 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 (δ) 7.5 µg/dL blood per µg/g soil
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.
[Pa.B. Doc. No. 14-1167. Filed for public inspection May 30, 2014, 9:00 a.m.]
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