SITE INFORMATION AND CORRESPONDENCE

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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) 300 ppm ND ND Ethylbenzene 480 ppm NO NO TPH (Diesel) NS NS Xylene _ 3320 ppm NO NO 1 Benzene 70 ppm NO NO Toluene 890 ppm NO NO MTBE NS ND Comments: The site was closed after the samples showed that the soil at the original excavation point was clean. ND is <.005 ppm for BTEX in soil , <1ppm for TPH gas in soil, <.5ppb for BTEX in water, <50ppb for TPH gas in water, and <5ppb for MTBE in water. i i 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Number Decommissioned: Number retained: List enforcement actions taken: NOR dated 4/17/97 fiList enforcement actions rescinded:. None V. Local Agency Representative Data Name: Donna Heran Title: Director of Environmental Health Signature: o Yl ✓� Date: i �. VI. Central Valley Regional Water Quality Control Board (RB) Notification Date Submitted to RB: September 2, 1997 Response Date: October 1, 1997 RB Staff: J. Brathovde Response: Concurrence with closure request Title: Assoc Eng Geologist jVII. Additional Comments, Data,etc. !I SOIL ONLY his document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part of the official . site file.