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Case Closure Sunil &'ax:y Page 2 <br /> Leakir-"-)Underground Fuel Storage Tank lr"'gram <br /> III. Release and Site Chaxak _,,rization Information (continue. r <br /> rximum Documented Contaminant Concentrations--Before and After Cleanup <br /> ntaminant Soil (ppm) Water (PPB) Contaminant Soil (ppm) Water (PPB) <br /> Before After Before After Before After Before After <br /> H (Gas) 100.0 29.0 290. <50. Xylene 33.0 13.0 122.0 <0.5 <br /> TPH (Diesel) 5300.0 <5.0 1700. <100. Ethylbenz ne ---- 2.7 25.0 <0.5 <br /> Benzene <2.0 <0.05 44. <0.5 Oil & Grease ___- ---- --_- ---- <br /> Toluene <2.0 0.2 0.1 3 .1 LEAD metals 6.9 <0.05 ---- ---- <br /> MTBE ---- ---- ---- ---- Other <br /> Comments (Depth of Remediation, etc.) : <br /> EXCAVATION REMOVED BULK OF HYDROCARBON MASS FROM SITE. ONLY LOW LEVELS OF GROUNDWATER <br /> CONTAMINATION OBSERVED AT THE SITE. BENEFICIAL USE OF GROUNDWATER ARE PROTECTED, NOW <br /> AND IN THE FUTURE. <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: NO Number Decommisioned:00 Number Retained: 03 <br /> List enforcement actions taken: NONE <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: DONNA HERAN Title: DIRECTOR, ENVIRONMENTAL HEALTH DIVISION <br /> Signature: Date: <br /> VI. RWQCB Notification <br /> Date Submitted to RB: RS Response: <br /> RWQCB Staff Name: 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 /> as part of the official site file. (08/24/93) <br /> Exhibit N Page 2 of 2 <br />