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CENTRAL VALLEY REGIONAL WATER QUALITY CONTROL BOARD <br /> CASE CLOSURE CHECKLIST <br /> Leaking Underground Storage Tank Program <br /> i This checklist, CASE CLOSURE letter, and the Unauthorized Release Report Form (URF) Is <br /> to be retained by the Regional Board and Local Implementing Agency as documentation of <br /> release and subsequent closure action All files and reports will be placed on microfiche for <br /> review <br /> I. Case Information SAN JOAQUIN COUNTY SITE CODE 505663 <br /> LUSTIS Case no URF fling date Closure date <br /> Site name/county FACILITY #5450 SAN JOA UIN COUNTY <br /> Site address 1617 W NT City STOCKTON Zip 95203 Phone <br /> Table I-Responsible Party Information <br /> Responsibte party Name Address City Zip Phone <br /> Property owner ARCO PRODUCTS CO. P.0 BOX 6549 MORAGA CA 94570 (510 )299-8891 <br /> C-serator t ( ) <br /> Operator 2 ( ) <br /> Operator 3 ) <br /> II. Release and Site Characterization Information <br /> Tank size(s) ttNKNowN Fuel type(s) itNT,FADFD c.ASOT.TNF <br /> Chemical type(s) and quantity(ies) released UNLEADED GASOLINE OF UNKNOWN QUANTITY FROM <br /> PRODUCT LINE REPLAC01NT <br /> Table 11 Lateral and Vertical Extent of Contamination <br /> Environment Lateral(ft) Vertical(ft) Contaminant Concentratwn Range <br /> Soil 10 10.6 BENZENE <0.005-0.087 mg"g <br /> Groundwater moll <br /> SQII type at the site TN7' RRFDDFD SANDS AND STT TS <br /> Source of drinking water under SWRCB POLICY 88-63 NO <br /> Were nearby wells (Domestic, Municipal, Ag, etc ) monitored? Yes No X <br /> Wells affected (Domestic, Municipal, Ag, etc ) NONE KNOWN <br /> Highest and lowest depths to groundwater 8.89 TO 12.37 FT BELOW TOP OF WELL CASING <br /> Seasonal groundwater gradient(s) and directions) UNKNOWN <br /> Name of Regional Water Quality Control Plan (Basin Plan) aquifer affected (see attached) <br /> SAN JOA UIN <br /> Surface water impacted? Yes No X <br /> . Name of surface water body affected NONE <br />