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RBCA Tool Kit for Chemical Releases,Version 1 3a <br /> RBCA SITE ASSESSMENT <br /> Tier 2 Domenico Groundwater Modettng Summary <br /> Site Name Tuff Boy Site Location Manteca CA Completed By GPS Dale Completed 25-Se 02 2 OF 2 <br /> DOMENICO GROUNDWATER MODELING SUMMARY <br /> OFF-SITE GROUNDWATER EXPOSURE PATHWAYS ■ (CHECKED IF PATHWAY IS AC"T"IVE) <br /> GROUNDWATER <br /> INGESTION 1)Source Medium 2)Steady-state Exposure Concentration 3)POE Concentration Limit 4)Time to Reach POE Cone Limit <br /> Groundwater POE Cone (mg/L) Groundwater PDE Cone (mgrL) Cont reaches limit? (■ 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 (5800 cm) (0 cm) (5800 cm) (0 cm) (5800 cm) (o cm) <br /> Constituents of Concern Conc (mg/L Residential None Residential None Residential None <br /> Benzene 1 7E-3 2 4E-5 2 9E-3 ❑ NA NA <br /> Toluene 8 OE-4 4 OE-16 7 3E+O ❑ NA NA <br /> Eth (benzene 1 3E-2 9 7E-8 3 7E+4 ❑ NA NA <br /> Xylene mtxed Isomers 1 2E-2 3 9E-6 7 3E+1 ❑ NA NA <br /> Methyl t-Butyl ether 8 6E-3 3 7E-5 3 7E-1 ❑ NA NA <br /> i <br /> NOTE POE=Point of exposure <br />