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Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> III Release and Site Characterization Information (continued) <br /> FTPH(Gas) <br /> Documented Contaminant Concentrations - - Before and After Cleanup <br /> ant Soil {ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> 16,000 13,000 52 .87 Ethylbenene210 160 1.8 .0073el) NA NA NA NA Xylene920 450 7.2 0032 55 20 9'7 '025 NA <br /> NA NA <.001 <br /> Toluene 69 19 6.9_ I - I I I .0014 MTBE <br /> 1 � <br /> Comments- Soil Before Results for Benzene and Toluene are from SB3 (8/94),for TPH-g, Ethylbenzene, Xylene are from <br /> Pit Interior Sample 2-12' (7/98). Soil After Results are from excavation sidewail sample 1-12' (7/98) Water Before Results <br /> are from MW 1 on 8/26/94. Water After Results are from MW 1A on 3/24/04. See site specific reports. 1522 cubic yards.of <br /> soil were excavated in 7198. Groundwater sample contaminant results have reduced significantly since the excavation of <br /> the contaminated soil. Some contaminated soil remains in place. <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 Plan? Yes <br /> Does corrective action protect public health for current land use? Yes <br /> FShl'd <br /> anagement requirements: None <br /> corrective action be reviewed if land use changes? Yes <br /> wells decommissioned: Yes Number Decommissioned: 10 Number retained: 0 <br /> ent actions taken: NOR <br /> ment actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: Donna Heran, REHS Title: Director, Environmental Health Department <br /> Signature: Date: q— Z—D <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification II <br /> Date Submitted to RB: 7/29/04 Response Date: 08/11/04 <br /> RB Staff: James Barton Response: Concurrence <br /> Title:Associate Engineering Geologist <br /> VII. Additional Comments, Data, etc. <br /> New production well with 200 foot annular seal installed in March 2004. Old production well destroyed by explosion and <br /> cement <br /> it in May 2004. <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 />