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f <br /> Case Closure Summary Page 2 <br /> Leak:' Underground Fuel Storage Tank )gram <br /> III. Release and Site Charat'Cerization Information (continue <br /> Maximum Documented Contaminant Concentrations--Before and After Cleanup******* <br /> Contaminant Soil (ppm) Water (PPB) Contaminant Soil (ppm) Water (PPB) <br /> Before After Before After Before After Before After <br /> TPH (Gas) 5500. ---- 130. 240. Xylene 110.0 ---- 1.3 1.4 <br /> TPH (Diesel) 4300. ---- <10. 108. Ethylbenzene 34.0 ---- 0.6 <1.1 <br /> Benzene 7.5 ---- 0.4 <1.3 Oil & Grease 430.0 ---- ---- ---- <br /> Toluene 20.0 ---- 0.9 <1.3 LEAD metals 5.9 ---- ---- ---- <br /> MTBE ---- ---- ---- <3 Other <br /> Comments (Depth of Remediation, etc.) : <br /> VERY LIMITED GROUNDWATER PLUME CONSISTENTLY SHOWS LEVELS BELOW PRIMARY DRINKING WATER <br /> STANDARDS. DOES NOT POSE A THREAT TO CURRENT OR FUTURE USERS. <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? YES <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 List enforcement actions rescinded: NONE 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: � ��(-fS Date: �? <br /> VI. RWQCB Notification <br /> Date Submitted to RB: RB 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 />