SITE INFORMATION AND CORRESPONDENCE

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%woo Case Closure Summary Page 2 r..1 Leaking Underground Fuel Storage Tank Program III Release and Site Characterization Information (continued) Maximum Documented Contaminant Concentrations - - Before and After Cleanup Contaminant Soil Soil Water Water Contaminant Soil Soil Water Water 1987 1999 Before After 1987 1999 Before After (ppm) (ppb) (ppm) (ppb) TPH (Gas) 30 ND<1.0 ---- ---- Ethylbenzene NIA ND<0.005 ---- ---- Motor Oil 2,700 ND<2.0 ---- ---- Xylene 8.0 ND<0.005 ---- ---- Benzene 5.0 ND<0.005 ---- ---- Lead 5.1 ---- ---- ---- Toluene 0.05 ND<0.005 ---- ---- Oxygenates ---- ND<0.005 ---- ---- MTBE ---- ND<0.005 ---- ---- Samples from the tank removal in 1987 indicated contamination in the soil, but subsequent sampling results were non- detect. 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 wells decommissioned: NIA Number Decommissioned: 0 Number retained: 0 List enforcement actions taken: NOR and 14-Day Compliance Notification Letter sent List enforcement actions rescinded: None V. Local Agency Representative Data Name: Donna Heran �r��7�'�f �Gr�1.r� 0 Title: Director of Environmental Health sir .��v,srrrJ�r<l Signature: ^4�z Date: Cj Vl. Central Valley Regional Water Quality Control Board (RB) Notification Date Submitted to RB: Response Date: RB Staff: Marty Hartzell Response: Title: Assoc Eng 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. (08124193) Exhibit N Page 2 of 2