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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) 1.1 <1 Ethylbeneno >.005 <.005 <br /> TPH(Diesel) 590 <10 Xylene >.005 <005 <br /> Benzene <005 C005 <br /> Toluene <005 <005 MTBE .031 >.005 <br /> Comments: All levels in ppm. Soil Before levels from UST removal samples on 412/03. Soil After levels are from � <br /> excavation on 5127103. No groundwater investigation was required since depth to water is 50 feet and non detect soil <br /> samples were collected at 17 feet below surface and contamination was limited. Soil remediation was removal of 50 cubic <br /> yards of contaminated soil on 5127103. <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 /> x <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/Vapor wells decommissioned: No Number Decommissioned: 0 Number retained: 0 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: Donna Heran Title: Director of Environmental Health <br /> Signature: Date: <br /> VI. Central Valley Regional Water.Quality Control Board (RB) Notification <br /> Date Submitted to RB: 10101103 . Response Date: 10/16/03 <br /> RB Staff: James Barton Response: Concurrence <br /> Title:Associate Engineering Geologist <br /> VII. Additional Comments, Data, etc. <br /> I <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 />