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Tier 2 Worksheet 9 3 <br /> RBCA SITE ASSESSMENT <br /> Site Name Time Oil Company Property 04 049 Completed By SECOR <br /> Site Location 14000 E Highway 88 Lockeford CA Date Completed 7/30/1998 1 OF 1 <br /> Target Risk(Class A&8) 1 OE-6 o MC(,exposure limit? Calculation Option 2 <br /> GROUNDWATER SSTL VALUES Target Rlsk(Class C) 10E5 o PEL exposure limit? <br /> Target Hazard Quotient t OE+O <br /> SSTL Results FOF GO lets Exposure Pathways("x"If Complete) <br /> Representative <br /> Concentratlon Groundwater Volatilization Groundwater Volatilization Applicable SSTL <br /> CONSTITUENTS OF CONCERN I Groundwater In estion X I to Indoor Air X I to Outdoor Air SSTL Exceeded>_Required CRF <br /> Residential Commercial Regulatery(MCL) Residential Commercial Residential Commercml <br /> CAS No Name (mg1L) fon-site) (on-stte) (on site) (off site) (on Ste) toff site) (on-site) (mg/l V If yes Only dyes [eft <br /> 71-43-21 Benzene-CA NA NA NA 1 OE-2 3 2E-2 2 9£+0 4 9E+0 3 2E-2 6 8E+01 <br /> 100-41-4 Ethylbenzene NA NA NA 1 1 E+2 >Sol >Sol >Sol >Sol <1 <br /> 108-88-3 Toluene NA NA NA 4 9E+1 1 3E+2 >Sol >Sol 1 3E+2 <1 <br /> 1330 20-7 X ene(mixed Isomers) NA NA NA >Sol >Sol >Sol Sol >Sol <1 <br /> Sol Indicates risk based target concentration greater than constituent solubility <br /> Software GSI RSCA Spreadsheet Senal G 147 MVX 152 <br /> ®Groundwater Services Inc (GSI) 1995 1997 All Rights Reserved Version 1 0 1 <br /> i <br />