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rte....-. . .. .�� __�... __�__�..� �- ..- ,. ...-•_...�,..�...-- �__�..__--�-, ..-. s � ... ...____� ,.- _. �..___ ,.. -._ - - - <br /> RBCA SITE ASSESSMENT <br /> Tier 2 Worksheet 9.2 <br /> Site NameMoore Petroleum Completed By:Apex Envirotech,Inc. <br /> Site Location.5491 F Streel,Banta,CA date Completed:2117/1998 1 OF 7 <br /> tl <br /> Target Risk(Class A&B) 1.0E-6 f MCL exposure limit? Calculation Option: 2 <br /> SUBSURFACE SOIL SSTL VALUES Target Risk(Class C) 1.0E-5 ❑ PELexpostrrelimit? Groundwater DAF Option, Domenico-No Decay <br /> (> 3.3 FT BGS) Target Hazard Quotient 1.0E+0 (Fwo-directional vert.dispersion) <br /> SSTL Results For Complete Exposure Pathways("x"If Complete) <br /> Representative <br /> Concentration Soil Volatilization to Soil Volatilization to Applicable SSTL <br /> CONSTITUENTS OF CONCERN TSoil Leaching to Groundwater Indoor Air X Outdoor Air SSTL Exceeded v Required CRF <br /> Residential: Commercial: Regulatory(MCL): Residential: Commercial: Residential. Commercial: <br /> CAS No. Name (mg/kg) 100 feet (on-site) (on-site) (on-site) (on-site) (on-site) (on-site) (mg/kg) "W"If yes Only if"yes"left <br /> 71-43-2 Benzene 3.0E-1 1.3E-3 2.8E-3 9.7E-4 NA NA NA 1.3E+1 9,7E-4 0 ii 3.1E+02 <br /> 68334-30-5 Diesel No.2 4.5E+2 1,9E-2 4.3E-2 1.6E-2 NA NA NA >Res 1.6E-2 a 2.8E+04 <br /> 100-41-4 Ethylbenzene 4.8E+0 1.2E+1 2.2E+1 1.5E+0 NA NA NA >Res 1.5E+0 ■ 3.0E+00 <br /> 163404D.OE+D <br /> 1634-04-4[Methyl t-Butyl Ether 1.1 E-t 2.0E-1 1.4E-2 NA NA NA >Res 1.4E-2 ❑ <1 <br /> 108-86-3 Toluene 0.0E+0 3.2E+1 6.0E+1 4.4E-1 NA NA NA >Res 4.4E-1 ❑ <1 <br /> ti <br /> k 1330-20-7 Xylene(mixed isomers) 8.5E+0 ?Res >Res 8.8E+0 NA NA NA >Res 8.8E+0 ❑ <1 <br /> Res indicates risk-based target concentration greater than constituent residual saturation value <br /> Software: GSI RSCA Spreadsheet Serial: G-357-KEX-572 <br /> D Groundwater Services,Inc.(GSI), 1995-1997.All Rights Reserved. version: 1.0.1 <br /> 1 <br /> i <br />