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` f Case Closure Summary Page 2 <br /> Leakix.. Underground Fuel Storage Tank i. gram <br /> III. Release and Site Characterization Information (continued) <br /> rmax3ilmlyn Documented Contaminant Concentrations--Before and After Cleanup <br /> m Water (PPB) Contaminant Soil (ppm) Water (PPB) <br /> taminant Soil (pp ) Before After Before After <br /> Before After Before After <br /> 6200. 340. ---- 140. Xylene 458.0 4.2 ---- <0.5 <br /> (Gas) 270. Eth lbenzene 73.0 1.1 ---- <0.5 <br /> BTPHen (Diesel) . 47.0 ---- <0.3 Oily& Grease ---- ---- ---- ---- <br /> Benzene 0 .0090095 <0.005 ---- <br /> Toluene 72.0 0.018 ---- <br /> <0.3 LEAD metals <1.0 ---- ---- ---- <br /> MTBE ---- ---- ---- <1.0 lother <br /> Comments (Depth of Remediation, etc.) : <br /> LIMIT3D EXCAVATION OF TANK PIT REMOVED HIGH PETROLEUM CONCENTRATIONS. ONLY RESIDUAL LEVELS <br /> FOUND IN SUBSURFACE. GW HAS HAS VERY LOW LEVELS OF TPEG AND TPHD.BTEX LEVELS RELATIVELY <br /> ND. BENEFICIAL USES PROTECTED, NOW 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? `IES <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 Decom=isioned: (Number Decommisioned: % Number Retained: �? <br /> List enforcement actions taken: NONE <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: DONNA Title: DIRECTOR, ENVIRONMENTAL HEALTH DIVISION <br /> Signature: <br /> VI. RWQCB Notification <br /> Date Submitted to RB: � Gi RB Response: C/t"A <br /> 7M <br /> RWQCB Staff Name: BRATSOVDE Title:ASSOC ENG GEOL Date: /I_Z_ <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 />