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Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> III Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations-- Before and After Cleanup <br /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH(Gas) 15,000 5,700 FP .430 Ethylbenene 39 130 FP .014 <br /> TPH (Diesel) 26,000 17,000 FP 7.6 Xylene 1100 650 FP .008 <br /> Benzene 56 18 FP .0058 <br /> Toluene 220 200 FP 0081 <br /> MTBE <.005 <br /> Comments: Free product (FP) in MW8, 10, 17 from August 1989 until October 1991. Water samples after for BTEX & <br /> TPH-g were from MW8, TPH-d were from MW17. Soil before for BTEX, 82 (55.5"), TPH-g UPLS (8'), TPH-d S82 (35'). <br /> Soil after for BTEX &TPH-g S136 (24'), TPH-d SB3 (215). <br /> i <br /> I <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan? Yes <br /> Does completed corrective action protect potential beneficial uses per the Regional Board Basin Plan? Yes ;! <br /> Does corrective action protect public health for current land use? Yes <br /> l <br /> Site management requirements: None <br /> Should corrective action be reviewed if land use changes? Yes <br /> Monitoring/Vapor wells decommissioned: Yes Number Decommissioned: 44 Number retained 0 <br /> List enforcement actions taken: NOR dated 9/13/90 <br /> List enforcement actions rescinded: <br /> I� <br /> V. Local Agency Representative Data <br /> Name: Donna Heran Title: Director Environmental Health <br /> Signature: Date: — 3J— 9 7 <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 9/8/97 Response Date: 10/1/97 <br /> RB Staff: P. Anderson Response: Concurrence <br /> Title: H dro eolo ist <br /> VII. Additional Comments, Data, etc. <br /> This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part of the official <br /> site file. <br />