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L <br /> RSCA Tool Kt for Chemical Releases,Version 1 3a <br /> RBCA SITE ASSESSMENT <br /> Tier 2 Domernco Groundwater Modeling Summary <br /> Site Name Tuff Boy Site Location Manteca,CA Completed By GPS Date Com leted 25-Se 02 2 OF 2 <br /> DOMENICO GROUNDWATER MODELING SUMMARY <br /> OFF-SITE GROUNDWATER EXPOSURE PATHWAYS ■ (CHECKED IF PATHWAY IS ACTIVE) <br /> GROUNDWATER <br /> INGESTION 1)Source Medium 2)Steady-state Exposure Concentration 3)POE Concentration Limn 4)Time to Reach POE Conc Limit <br /> Groundwater POE Cone(mg&) Groundwater POE Conc (mgfo Conc reaches limit? ("M If yes) Time(yr) <br /> Off-site 1 Off-site 2 Off site 1 Off-site 2 Off site 1 Off-site 2 <br /> Groundwater (2450 cm) (0 cm) (2450 cm) (0 cm) (2450 cm) (0 cm) <br /> Constituents of Concern Conc (mg/L Residential None Residential None Residential None <br /> Benzene 1 7E-3 3 2E-4 2 9E-3 ❑ NA NA <br /> Toluene 8 OE-4 6 5E-11 7 3E+0 ❑ NA NA <br /> Eth (benzene 1 3E-2 3 4E-5 3 7E+0 ❑ NA NA <br /> Xylene mixed Isomers 1 2E-2 2 9E-4 7 3E+1 ❑ NA NA <br /> Methyl t-But l ether 8 6E-3 8 7E-4 3 7E-1 ❑ NA NA <br /> NOTE POE=Point of exposure <br /> I <br />