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Case Closure Summary Page 2 of 2 <br /> • I <br /> Case Closure Summary <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) <1.0 NA NA Xylene <0.005 * <.0005 +<.0005 <br /> TPH (Diesel) 63. * 0.390 + <0.05 MTBE <0.05 <.0005 +<.0005 <br /> Benzene <0.005 * <0.0005 +<.0005 <br /> Toluene <0.005 * <0.0005 +<.0005 <br /> Ethyl-benzene <0.005 * <0.0005 +<.0005 <br /> Comments NOTE., GROUNDWATER RESULTS IN PARTS PER MILLION! <br /> no remediation performed (no 'after' samples). <br /> +: last monitoring well sample (270ctober2003) <br /> Only two (2) ground water sampling events held since the three (3) monitoring wells were installed,July 18, 2003. <br /> No TPHd ever in monitoring well ground water samples. Only T41d ground water'hit' (0.390 PPM)from push-point <br /> soil boring, "PB-GW-3", 10' south of tank it, 19 September 2002,and now location of MW-3, still <0.05 ppm. <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan? No remed action. <br /> Does completed corrective action protect potential beneficial uses per the Regional Board Basin Plan? nla (none done) <br /> Does corrective action protect public health for current land use? No remed done <br /> Site management requirements: none <br /> Should corrective action be reviewed if land use changes? Not required <br /> Have the Monitoring/Vapor wells been decommissioned? Not yet Number Decommissioned: 0 Number retained: 3 <br /> List enforcement actions taken: NOR, 11June2002 <br /> List enforcement actions rescinded: nla <br /> V. Local Agency Representative Data <br /> Name: Donna Heran/ Nuel Hendersen Title: Director of Environ Health 1 Registered Geologist <br /> Signature: '6i` Date: OZ �.�• a �f <br /> VI. Central Valley Regional Water Quality Control Board RB Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: James L.L. Barton Response: <br /> Title: Engineering Geologist <br /> VII. Additional Comments, Data, etc. <br /> No remediat!on directed or performed at site. Monitoring wells placed at requirement of J. Barton (CVRWQCB). <br /> Two ground water sampling events revealed low level soil TPHd has NOT impacted ground water X10'from former <br /> UST pit. No sensitive receptors within 2000 feet. <br /> This document and the related CASE CLOSURE LETTER shall be retained by the lead agency as part of the official site file. <br /> MI/2/04 } <br />