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I <br /> Case Closure Summary Page 2 <br /> Leakingerground Fuel Storage Tank Prc' . <br /> Release and Site Characte ation Information (continued) <br /> Maximum 'Documented Contaminant Concentrations--Before and After Cleanup <br /> Contaminant Soil (ppm) water (PPB) Contaminant Soil (ppm) Pater (PPB) <br /> Before After Before After Before After Before After <br /> TPH (Gas) x10 ---- ---- ---- Xylene 0.32 x0.005 **5.0 ---- <br /> TPH (Diesel) 1200 200 **520 ---- Ethylbenzene 0.19 x0.005 **2.9 ---- <br /> Benzeneli <0.05 <0.005 **0.3 ---- Oil & Grease ---- ---- ---- ---- <br /> Toluene 0.22 ¢0.005 **2.5 ---- LEAD metals ---- ---- ~--- ---- <br /> MTBE ; ---- <0.005 ---- ---- Other <br /> Comments (Depth of Remediation, etc.) : <br /> EXCAVATION REMOVED BULK OF HYDROCARBON MASS FROM SITE. VERY LIMITED SOIL CONTAMINATION <br /> REMAINING. ONLY VERY LOW GRAB GROUNDWATER CONTAMINATION SHOWN. BENEF3CIAL USES ARE <br /> i <br /> PROTECTED, NOW AND IN THE FUTIIRE. **GRAB WATER SAMPLES** <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? NO <br /> Monitoring wells Decommisioned: NA Number Decommi sioned: Number Retained: <br /> List enforcement actions taken: <br /> List enforcement actions rescinded: NONE <br /> �a <br /> V. Local Agency Representative Data <br /> Name: DONNA HERRN Title: DIRECTOR, ENVIRONMMNTAL HEALTH DIVISION <br /> Signature: Date: <br /> VI. RWQCB Notification <br /> Date Submitted to RB: RB Response: <br /> RWQCS Staff Name: Title: Date: <br /> VII. Additional Comments, Data, etc. <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 />