SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

-- 1 LJ `J 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) 1900 770 Ethylbenene 7.6 13 TPH (Diesel) Xylene 160 67 Benzene <2.5 <.1 Toluene 64 6.9 MTBE <:01 Comments: All levels in ppm. Soil Before from 11/24/92 sample from bottom of UST excavation at 9.5 feet below grade. Soil After from 9/21/95 UST excavation bottom sample at 11 feet below grade. 22 cubic yards of contaminated soil removed and stockpiled on site. Soil probe sample results indicate a limited amount of contaminated soil remains in place. 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? NO Monitoring/Vapor wells decommissioned: Number Decommissioned: Number retained: List enforcement actions taken: NOR List enforcement actions rescinded: None V. Local Agency Representative Data Name: Margaret Lagorio Title: Supervising REHS Signature: iL ti35 1 5 VI. Central Valley Regional Water Quality Control Board (RB) Notification Date Submitted to RB: Response Date: RB Staff: Mark List Response: Title: Engineering Geologist VII. Additional Comments, Data, etc. 11 SOIL ONLY This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part of the official site file.