SITE INFORMATION AND CORRESPONDENCE

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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) 3 <1 0.25 <0.05 Xylene <1 <0.005 0.45 <0.0005 TPH(Diesel) NA NA NA NA Ethylbenzene UNK <0.005 UNK <0.0005 Benzene <1 <0.005 0.007 <0.0005 Oil &Grease NA NA NA NA Toluene <1 <0.005 0.09 <0.0005 Heavy Metals PB 13 PB 13 NA NA MTBE UNK UNK UNK <0.005 Comments:Two borings (one slant, one vertical)to groundwater were completed on 07/10/00 in former UST area. Soil and groundwater samples were collected and analyzed which did not confirm the release documented in 1985. An on site irrigation well was destroyed 08117100. No other wells were found within a 2000 foot radius of the former UST. CRWQCB closure concurrence fetter received October 23, 2000. 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: Should corrective action be reviewed if land use changes?yes Monitoring/Vapor wells decommissioned: Number Decommissioned: Number retained: List enforcement actions taken: level 1. List enforcement actions rescinded: V. Local Agency Representative Data Name: Donna Heran, REHS Title: Director of Environmental Health Signature: \ Date: 6-.3—O r JC�YLvu� 1 VI. Central Valley Regional Water Quality Control Board (RB) Notification Date Submitted to RB: 10/04/00 Response Date: 10/23/00 RB Staff: Martey Hartzell Response: Concurrence Title:Associate Engineering Geologist VII. Additional Comments, Data, etc. 1985 release unconfirmed in 2000.