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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 I 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 slant borings to groundwater were completed orft7/10/00 informer UST area. Soil and groundwater samples collected and analyzed did not confirm UAR documented in 1985. An on site irrigation well was destroyed 08/17/00 and no other well were found within a 2000 foot radius of the former UST. 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 List enforcement actions rescinded: V. Local Agency Representative Data Name: Margaret Lagorio Title: Dot Lofstrom Registered Geologist Signature: Date: VI. Central Valley Regional Water Quality Control Board (RB) Notification Date Submitted to RB: Response Date: RB Staff: Martey Hartzell Response, Title: Associate Engineering Geologist VII. Additional Comments, Data, etc. 1985 UAR unconfirmed in 2000. This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part of the official site file.