[27 Pa.B. 4181]

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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
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 (|gd)		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.

APPENDIX A

TABLE 8
CONSTITUENTS OF POTENTIAL ECOLOGICAL CONCERN

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

[Pa.B. Doc. No. 97-1340. Filed for public inspection August 15, 1997, 9:00 a.m.]

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