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--case Closure Summary Page 2 <br /> Leakin` 'nderground Fuel Storage Tank P� �ram <br /> III: Release and Site Charac' ization Information {continued7. <br /> Maximum Documented Contaminant Concentrations--Before and After Cleanup <br /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH (Gas) N/A N/A N/A. N/A Xylene ND ND ND ND <br /> TP H (Diesel) 2200 2200 ND NO Ethylbenzene ND s ND ND ND <br /> Benzene ND ND ND ND Oil & Grease N/A ? N/A N/A N/A <br /> Toluene ND ND ND ND Heavy metals N/A ;' N/A N/A N/A <br /> Other N/A N/A N/A N/A Other IN/Ag N/A N/A N/A <br /> Comments (Depth of Remediation, etc.) : <br /> CONTAMINATED SOIL REMOVED FOR DISPOSAL. DIESEL CONTAMINATED SOIL REMAINS INSIDE BUS WASH <br /> AREA AT l8 - 20 FEET (BGS) . 3 MWs INSTALLED WITH PETROLEUM"HYDROCARBONS IMPACT AND WELL5 <br /> DESTROYED. <br /> IV. Closure <br /> Does completed corrective action protect existingbeneficial uses per the Regional Board <br /> Basin Plan? (Yes) No <br /> Does completed corrective action protect potential beneficial uses per the Regional Board <br /> Basan P1anY (Yes) No <br /> Does corrective action protect public health for current land use? (Yes) No <br /> Site management requirements: <br /> Should corrective action be reviewed if land use changes? Yes (No) <br /> Monitoring wells Decommi.sioned: (Yes) No Number Decommisioned: 3 Number Retained: 0 <br /> List enforcement actions taken: <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: DONNA HE RAN Title: DIRECTOR, ENVIRONMENTAL HEALTH DIVISON <br /> I <br /> Signature: J - U--n.-, `_ " Date: <br /> VI. RWQCB Notification <br /> Date Submitted to RB: RB Response: <br /> RWQCB Staff Name: E THAYER Title: ASSOC ENGINEER Date: <br /> VII. Additional Comments, Data, etc. <br /> SOIL ONLY; TPH-DIESEL RESIDUAL IN SOIL. GROUNDWATER INVESTIGATION HAS INDICATED NO <br /> GROUNDWATER IMPACT. <br /> i <br /> S <br /> i <br /> This document and the related CASE CLOSURE LETTER, Shall be` retained by the lead agency <br /> as part of the official site file. (08/24/93) <br /> Exhibit N Page :2 of 2 <br /> ' 1 <br />