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i Case Closure Summary Page 2 <br /> e Leakingerground Fuel Storage Tank Prem <br /> IIfa. . Release and Site Charact ation Information (continued) <br /> Maximum Documented Contaminant Concentrations--Before and After Cleanup <br /> Contaminant Soil (ppm) Water (PPS) Contaminant Soil (ppm) Water (PPB) <br /> Before After Before After Before After Before After <br /> TPH (Gas) 1600. <1.0 ---- ---- Xylene 240.0 0.157 ---- ---- <br /> TPH (Diesel) 2900. 4.4 ---- ---- Ethylbensene ---- 0.14 ---- ---- <br /> Benzene 4.0 0.132 ---- ---- Oil & Grease ---- <10.0 ---- ---- <br /> Toluene 79.0 0.041 ---- ---- Heavy metals 10.0 <5.0 ---- ---- <br /> Other EDB <.02 Other <br /> Comments (Depth of Remediation, etc.) : <br /> BULK OF IMPACTED SOIL REMOVED BY OVER-EXCAVATION. LIMITED AMOUNT REMAINING IN <br /> PLACE NOT CONSIDERED A THREAT TO GROUNDWATER WHICH IS OVER 100 FEET AWAY FROM SOURCE. <br /> f <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: N/A Number Decommisioned:-- Number Retained: -- <br /> List enforcement actions taken: INITIAL DIRECTIVE LETTER <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: DO RERAN Title: DIRECTOR, ENVIRONMENTAL HEALTH DIVISION <br /> Signature: NLN G—PI Date: <br /> VI. RWQCB Notification <br /> Date Submitted to RB: 02-06-95 RB Response: NO RESPONSE <br /> RNQCB Staff Name: THAYER Title: STAFF ENG Date: <br /> VII. Additional Comments, Data, etc. <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 />