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Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> lil Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations -- Before �nd After Cleanup <br /> Contaminant Soil (ppm) Water (ppm) Cotaminant Soil (ppm) Water (ppm) <br /> Before After Before After i Before After Before After <br /> TPH (Gas) xxxxxxx Xxxxx xxxxx xxxxxx Xyl6ne 28 <.005 xxxxxx <.005 <br /> TPH (Diesel) 7300 <.005 xxxxx .910 Ethyibenzene 5.9 <.005 xxxxxx <.005 <br /> Benzene <.9 <.005 xxxxx <..005 Oil &Grease xxxxxx xxxxx xxxxxx xxxxxx <br /> Toluene <.67 <,005 xxxxx <.005 Heavy Metals xxxxxx xxxxx xxxxxx xxxxxx <br /> MTBE xxxxxx <5 xxxxxx <.001 <br /> Comments Soil before results are from over-excavation stockpiles in 1994. Soil after samples are from borings <br /> done in June 1999. Water after samples are from boring grab samples June 1999. Site adjacent to this site on the <br /> south is currently in LOP and samples groundwater quarterly. <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 ler the Regional Board 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/Vapor wells decommissioned: 0 Number Deco Tmissioned: 0 Number retained: 0 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: MARGARET LAGORIO, REHS Title: SUPERVISOR, SITE MITIGATION UNIT <br /> Signature: Dbte: a r�-� Q <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: Riesponse Date: <br /> RB Staff: MARTY HARTZELL Response: <br /> Title: ASSOCIATE ENGINEERING GEOLOGIST <br /> VII. Additional Comments, Data, etc. <br /> Minimal soil and groundwater contamination, no nearby recepi ars appear to be at risk. <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 />