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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 /> 7EMax�im:umcumented Contaminant Concentrations --Before and After Cleanup Soil (ppm) Water (ppm) Contaminant Soil (ppm) WaterBefore After Before After (ppm)Before After Before After 2,800 1,700 FPPH 470 Xylene 220 110 FPPH 013 NIA NIA NIA NIA Ethylbenzene 230 32 FPPH .0516 <br /> 98 7.1 FPPH 014$ Oil 8�Grease NIA NIA NIA NIA <br /> 75 3.9 FPPH .3038 Heavy Metals NIA NIA NIA NIA <br /> NIA NIA NIA NIA TBA UNKNOWN .228 <br /> ---------------------- <br /> =GROUNDSURFACE, <br /> ND TREAT WAS INEFFECTIVE IN REMEDIATION AND SOIL ROMOVED TO 9 FEET BELOW <br /> . GROUNDWATER CONTAMINANT CONCENTRATIONS ARE DECLINING DUE TO NATURAL <br /> <5 PPB IN ALL GROUNDWATER MONITORING WELLS. <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 /> Site management requirements: <br /> Should corrective action be reviewed if land use changes? (YES) <br /> Monitoring/Vapor wells decommissioned: (YES) Number Decommissioned: 16 Number retained: 0 <br /> List enforcement actions taken: LEVEL ONE, NOR SENT TO RESPONSIBLE PARTY <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: P9NNA HEIAN ' Title: DIRECTOR ENVIRONMENTAL HEALTH <br /> Signa r Date: <br /> V. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 8120199 Response Date: 9123199 <br /> RB Staff: MARK LIST Response: CONCURRENCE <br /> Title: ENGINEERING GEOLOGIST <br /> VII. Additional Comments, Data, etc. <br /> CVRWQCB CLOSURE CONCURRENCE LETTER DATED 09123199. <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 />