Laserfiche WebLink
Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tankl�Program <br /> w <br /> III Release and Site Characterization Information (continued) } <br /> i <br /> Maximum Documented Contaminant Concentrations --Before and After Cleanup <br /> �i �i <br /> Contaminant Soil (ppm) Water (pprn), Contaminant Soil (ppm) Water <br /> Before After Before After j (ppm) <br /> Before After Before After <br /> TPH(Gas) 2400 2400 0.059 <0.05 Xylene �� 230 230 0.001fi <p,QS r <br /> TRH(Diesel) 9900 9900 <0.05 <0.05 Ethylbenzene. 39 39 <0.0005 <0.0005 <br /> Benzene 0.68 0.68 0.0012 <0,0005 Oil&Grease ria na na <br /> na <br /> Toluene <0.5 <0.5 0.0051 <0.0005 Heavy Metals lead 12 12ppm na na <br /> MTBE I unk unk <0.00050 <0,0005 <br /> Comments: Soil analytical results before and after are from the base of the tank excavation after soil removal on 10/18/93 <br /> (T11-K). Groundwater results before are from MW#4 (shallow well)after well installation on 4113/87. Groundwater after <br /> Gap <br /> are from MW4 on 911/99. All MWs and VEWs destroyed by pressure grouting. <br /> ii <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan?yes <br /> 1i 4 <br /> k 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 /> d� l <br /> Site management requirements: na <br /> Should corrective action be reviewed if land use changes? no <br /> i <br /> Monitoring/Vapor wells decommissioned:yes Number Decommissioned: 10 Number retained: 0 <br /> 9 <br /> List enforcement actions taken: level one, NOR sent to RPS �� <br /> List enforcement actions rescinded:na a <br /> V. Local Agency Representative Data <br /> l k <br /> Name: Donna Heran Title: EHD Dir t <br /> ec or <br /> Signature: Date: <br /> VI. Central Valley Regional Water QualityControl Board ' <br /> RB Notification( <br /> Date Submitted to RB:03-06-03 Response'Date:03-20-03 <br /> RB Staff:J. Barton Response' Concbrred with No Further Action requested <br /> Title:Assoc Eng Geologist r ' <br /> i� <br /> VII. Additional Comments, Data, etc. ! <br /> Ail well destroyed after receiving closure concurrence. <br /> 1t �€ <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 /> W ib , <br />