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According tot p Developing draft report, Develo in Petroleum Hydrocarbon Cleanup Levels, issued by the <br /> Washington State Department'of Ecology on August 15, 2001, WRM divided the maximum <br /> reported TPH-as-gasoline and TPH-as-diesel concentrations into aliphatic and aromatic carbon <br /> fractions. Specifically, the representative concentrations of TPH-,as-gasoline and TPH-as-diesel <br /> in surface soil, groundwater and soil vapor were assumed to be comprised of weathered <br /> gasoline and weathered diesel divided into the following carbon ranges: <br /> Carbon Range TPH G Percentage TPH D Percentage <br /> Aliphatic C5-C6 2.64% 0.003% <br /> Aliphatic C6-C8 14.13% 0.12% <br /> Aliphatic C8-C10 9.94% 0.91% <br /> Aliphatic C10-C12 13.81% 4.19% <br /> Aliphatic C12-C16 0.0% 30.46% <br /> Aliphatic C16-35 0.0% 43.28% <br /> Aromatic C8-C10 10.25% 0.57% <br /> o . 3.15% . <br /> Aromatic C10-C12 20.24% <br /> Aromatic C1246 16.11% 9.47% <br /> Aromatic C16-21 0.0% 7.7% <br /> Aromatic C21-35 0.0% 0.07% <br /> 3.4.3 RISC4 Program Results <br /> Results from the RISC4 program suggest that cumulative carcinogenic risk levels for a child <br /> resident and adult worker at RME levels do not exceed the target carcinogenic risk level of one <br /> in one million, and that the target hazard quotient of one is not exceeded for either a child <br /> I � ` <br /> resident or adult worker. The RISC4 program,input and output is provided as Appendix E, and a <br /> summary of the RISC4 results is provided below: <br /> 'Child Resident Receptor <br /> Exposure Pathway Carcinogenic Hazard Quotient <br /> Risk <br /> Ingestion of soil 7.7;E-7 4.7 E-1 <br /> Dermal contact with soil 6.9 E-8 1.8 E-1 <br /> Ingestion of groundwater 0.0. 0.0 <br /> Dermal contact with 0.0 0.0 <br /> groundwater <br /> Indoor air inhalation .` 2.7 E-8 3.6 E-3 <br /> 4 Total 8.0E-7 6.5 E-1 <br /> 13 <br />