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Case Closure Summary Page" <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 Sail (ppm) Water (ppm) Contaminant IT<-(P0-P-Mr) <br /> Before After Before After Water (ppm) <br /> TPH(Gas) 16D 90 Before After <br /> 2.1 <.05 Ethylbenene 0.053 <0,0005 <br /> TPH(Diesel} 4,200 3,900 2,900 c,DS Xylene 0.068 <0.0006 <br /> Benzene <0.005 <0.005 0.038 <0.0005 MTBE 0.0082 <0.001 <br /> Toluene <0.005 <0.005 0.012 <0.0005 <br />' Comments: Soil Before diesel results are from T-1 collected beneath the tank Q 10 feet bsg on 08/12/97; gasoline results <br /> are from MW5-10 collected on 01/31/02; benzene,toluene, ethyl benzene and total xylene results are from (T1)S2-10 <br /> (TR-1)collected on an adjacent property on 10/25/99; and MTBE results are from P1-15 collected on 07/13/00. Soil After <br /> diesel results are from 82-10 collected on 08/08/07; and gasoline, benzene, toluene, ethyl benzene, total xylene, and MTBE <br /> results are from 81-10 collected on 08/08/07 . Water Before diesel, gasoline, and MTBE results are from P4-H2O collected <br /> on 07/13/00; and benzene, toluene, ethylbenzene, and total xylene results are from Water-1 collected from the bucket of the <br /> backhoe from di in beneath the tank on 08/12/97. Water After results are from the monitorinq wells on 2/6/07. <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 Pian? 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: Yes Number Decommissioned: 6 Number retained: 0 <br /> List enforcement actions taken: NOR 02/23/00 <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: Donna Heran Title: Director of Environmental Health Department <br /> Signature: Date: <br /> VI. Central Valley Regional Water Quality Control Board (RB)Notification <br /> E <br /> ubmitted to RB: 8/8/08 Response Date: 8/28/08 <br /> ff: James L.L. Barton Response: Concurrence on No Further Action Required <br /> ssociate En ineerin Geol2gist <br /> VII. Additional Comments, Data, etc. <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 />