SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

- = -"Case Closure Summary Page 2 Leaking Underground Fuel E torage Tank Program III Release and Site Characterization Information (continued) Maximum Documented Contaminant Concentrations -- Before and After Cleanup Contaminant Soil (ppm) Water (ppm) Co taminant Soil (ppm) Water (ppm) Before After Before lAfter I Before After Before After TPH(Gas) <.200 <.005 Eth benene .097 <.Q001 TPH (Diesel) 22,900 x.05 Xyl ne .407 <.0001 Benzene .002 <.0001 MTEIE <.002 NA Toluene .2 <.0001 PC .085 .0041 Comments: There was no cleanup/remediation performed. Soil Bef re results for TPH-d is from a slant boring on 2126107 and for TPH-g and BTEX, MTBE from B1-14 on 3/6/2008. Water B fore results are from a grab sample from B5 on 4/20109. Soil contamination remains in place within about a 4 foot r dius of the center of the UST that was closed in place. The volume of contaminated soil remaining is limited. The groundwater is non-detect except for PCE which is below the MCL. IV. Closure ' I i Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan? Yes Does completed corrective action protect potential beneficial uses per the Regional Board Basin Plan? Yes Does corrective action protect public health for current land use? Yes Site management requirements: None Should corrective action be reviewed if land use changes? Yes Monitoring/Vapor wells decommissioned: Number Decommissioned: Number retained: 0 List enforcement actions taken: NOR List enforcement actions rescinded: V. Local Agency Representative Data Name: Margaret Lagorio Title: Program Coordinator Signature: Dale: VI. Central Valley Regional Water Quality Control Board (RB) Notification ' Date Submitted to RB: Response Date: RB Staff: James L.L. Barton Response: Title: Associate Engineering Geologist VII. Additional Comments, Data, etc. This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part of the official site file.