SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

! Case Closure Summary Page 2 Leaking Underground Fuel Storage Tank Program III Release and Site Characterization Information (continued) Maximum Documented Contaminant Concentrations --Before and After Cleanup Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) Before After Before After Before After Before After TPH (Gas) 1,600 400 36 0.112 Ethylbenene 26 11 1.4 0.0016 TPH (Diesel) NA NA NA NA Xylene 140 43 5.9 0.0089 Benzene 0.8 0.3 1.7 0.0079 MTBE 0.2 0.065 0.025 0.0008 Toluene 42 5.9 4.6 <0.0005 Comments: Soil Before TPH-gasoline and MTBE results are from P1@4.5; benzene results are from TK1-N@13; and toluene, ethyl benzene, and total xylene results are from TK1-S@15, all collected on 09/04/96. Soil After results are from 132-15 collected on 02/03/01. Water Before results are from B-2 collected on 02103/01. Water After results are from MW-1 collected on 12/11/07. IV. Closure 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: Yes Number Decommissioned: 3 Number retained: 0 List enforcement actions taken: NOR 04/10/97 List enforcement actions rescinded: None V. Local Agency Representative Data Name: Donna Heran Title: Director of Environmental Health Signature: - Ily ILI Date: / OSS VI. Central Valley Regional Water Quality Control Board (RB) Notification l Date Submitted to RB: 8/18/08 Response Date: 8/28/08 RB Staff: James L.L. Barton Response: Concurrence 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.