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Data Summary Table-Soil Samples <br /> Western Farm Service, Inc., Vernalis,California. <br /> Area Sample Sample Depth pll Field Test Nitrate as N Ammonia as N TPH/BTEX <br /> Location (feet below Nitrate as N EPA 300.0 EPA 350.3 EPA 8015/8020 <br /> round surface) (mg/lig ) (m ) (mgN) (mg/kg)t`1 <br /> Old tank farm VERs 1 to 3 8.5 4,458 - <br /> 3to5 8.5 713 - -- <br /> 6 to 8 8.0 S3 70 910 <br /> 14 to 16 8.0 31 36 1 100 <br /> Old tank faun VER2 Surface 7.0 15,721 - - <br /> Old tank farm VER3 1 to 3 7.0 356 - - - <br /> 3 to 5 7.0 360 406 6 <br /> 6 to 8 7.0 .499 - - - <br /> 14 to 16 7.0 176 - - <br /> 1 <br /> Old tank farm VER4 1 to 3 7.5 1,229 - - <br /> 3to5 7.5 711 - - <br /> 6 to 8 7.5 2,972 - - <br /> 14 to 16 7.0 17 19 6 <br /> Old tank farm/ VERS 1 to 3 8.0 1,330 2,257 4,900 EH 16 <br /> spray oil storage 3 to 5 8.0 1,072 1,828 4,100 EH 16 <br /> 6 to 8 8.0 1,109 1,445 4,200 EH 590' <br /> 14 to 16 7.0 379 700 950 EH 880" <br /> Old tank farm VER6 1 to 3 8.0 1,650 - - -- <br /> 3 to S 8.0 1,230 - - <br /> 6 to 8 8.0 1,032 - t <br /> 14 to 16 7.5 373 - - - <br /> Old tank farm VER7 1 to 3 9.0 1,590 - - <br /> 3 to 5 7.0 1,729 - <br /> 6 to 8 8.0 886 - <br /> 14 to 16 7.0 332 - - - <br /> Old tank farm VER 8 1 to 3 7.0 47 77 19 - <br /> 3 to 5 7.0 23 45 9 <br /> 6 to 8 7.0 58 63 6 <br /> 14 to 16 7.0 4 9 4 <br /> Old tank area VER9 1 to 3 7.0 647 1.309 2,200 - <br /> 3 to 5 7.5 429 - - j <br /> 5 to 6 7.0 271 - <br /> Old tank area VER10 1 to 3 7.0 268 - - - <br /> 3 to 5 7.0 160 115 820 <br /> 5 to 6 7.0 203 - - - <br /> Risk-based Screening Levels(RBSLs and Site-specific Screenine Levels <br /> t <br /> Soil leaching to groundwater,drinking water ingestion,residential exposure 50 NA LUFT R) <br /> Leaching from soil to groundwater,dirnking water ingestion,MCL 8.57 NA TPH-d 1,000 <br /> Direct soil exposure,ingestion,dermal contact,dust&vapor inhalation,comm/ind 3,240,000 5,876 <br /> Volatilization from subsurface soil to ambient(outdoor)air,comm/ind NA 10,000 <br /> Central Valley Regional Water Quality Control Board 100 100 <br /> ('incl.NH4 as N) (incl.NO3 as N) <br /> 4 <br /> Preliminary Remediation Goals(PRGs)(industrial soil) 22,573 NA t <br /> l) EH = extractable hydrocarbon (2)Assume groundwater 25 to 50 ft deep <br /> = not analyzed "NA" = not available or applicable "Estimated value based on QA/QC review gg <br /> 1 <br /> i <br /> i <br /> W66108 t of 1 4/1/96 <br /> z <br />