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Case Closure Summary Page 2 r <br /> + Leak" Underground Fuel Storage Tank gram <br /> III. Release and Site Chars erization Information (continu <br /> Maximum Documented Contaminant Concentrations--Before and After Cleanup <br /> I <br /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (Ppm) <br /> Before After Before After Before After Before After <br /> TPH (Gas) 5.400 320 3.6 .058 Xylene 710 .46 0.19 <.00Q5 <br /> TPH (Diesel) NA NA NA NA Ethylbenzene 120 .016 O.Q39 <br /> Benzene 7.Q x0.05 3 .1Q 0.0012 Oil & Grease NA NA NA NA <br /> Toluene 140 .0062 0.22 0.0012 Heavy metals LEAD 8.2 NA NA NA <br /> Other Other <br /> FC! <br /> s (Depth of Remediation, etc.) : <br /> EMOVED AND SOIL EXCAVATED TO APPROX 15BGS. SAMPLED IN STOCKPILE AND THEN AFTER <br /> LACED AT 15, BGS AND ALONG THE VERTICAL WALLS, SOIL RETURNED TO PIT FOR VAPOR <br /> ION AT LATER DATE. NESTED AND UN-NESTED VAPOR WELLS (4) AND VAPOR PROBES (9) UTILIZEDVE SOIL VAPORS AT FIRST WITH THERMAL DESTR THEN CARBON.MW 3 EXTRACTION TO SEWER.J <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board <br /> Basin Plan? Yes <br /> Does completed corrective action protect potential beneficial uses per the Regional Board <br /> Basin Plan? Yes <br /> Does corrective action protect public health for current land use? Yes <br /> Site management requirements: none <br /> Should corrective action be reviewed if land use changes? Yes <br /> Monitoring wells Decommisioned: No Number Decommisioned: Number Retained: 5 <br /> List enforcement actions taken: none <br /> List enforcement actions rescinded: none <br /> V. Local Agency Representative Data <br /> Name: MARGARET LAGORIO Title: SUPERVISOR LOP <br /> Signature: v�u Date: X114 /"1 <br /> �G <br /> VI. RWQCB Notification <br /> Date Submitted to RB: RB Response: <br /> RWQCB Staff Name:J. BRATHVODE Title: Date: <br /> VII. Additional Comments, Data, etc. <br /> This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency <br /> he official site file. (08/24/93) <br /> as part of t <br /> II. Exhibit N Page 2 of 2 <br />