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Case Closure Summary Page 2 } <br /> Leaking Underground Fuel Storajge Tank Program <br /> III Release and Site Characterization Information (continued) ' <br /> it Il <br /> I Maximum Documented Contaminant Concentrations --Before and After Cleanup <br /> f; <br /> Contaminant Soil (ppm) Water (ppm) Contamiriant Soil (ppm) Water (ppm) <br /> Before After Before After ! 1. <br /> i Before After Before After <br /> TPH (Gas) 5,350 810 NO NO Xylene f 115,000 60 NO NO <br /> TPH (Diesel) NIA NIA NIA NIAEthylbenzene '20,000 23 ND ND ' <br /> Benzene 1,000 9.4 ND ND Oil&Grease N/A N/A NIA NIA <br /> Toluene 1,800 1.7 ND ND Heavy Metals NIA NIA NIA NIA <br /> MTBE I LINK 5.5 ND NO <br /> u <br /> Comments: THE CONTAMINATED AREA WAS EXCAVATED TO GROUNDWATER AT 23' BGS. DUI~ TO PUBLIC is <br /> i ROAD AND STORE BUILDING; SOIL RESIDUAL REMAINS AT 20' BGS WITH NO IMPACT TO GROUNDWATER(2 ON <br /> i SITE GEO PROBE WATER SAMPLES COLLECTED NOVEMBER 12, 1996 BY ADVANCED GEOENVIRONMENTAL, <br /> INC.) <br /> M �,I <br />! IV. Closure <br /> j <br /> Does completed corrective action protect existing beneficial uses pet 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 /> i <br /> Site management requirements: <br /> Should corrective action be reviewed if land use changes? YES <br /> i3 <br /> Monitoring/Vapor wells decommissioned: Number Decommissioned: Number retained: i <br /> List enforcement actions taken:. LEVEL ONE, NOR MAILED TO RESPONSIBLE PARTY <br /> ii <br /> List enforcement actions rescinded: ;F <br /> V. Local Agency Representative Data i <br /> Name: DONNA HERAN Title: DIRECTOR OF ENVIRONMENTAL HEALTH <br /> i, <br /> Signature: Date: <br /> f� <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> ,j <br /> ij <br /> Date Submitted to RB: a�3� CL� Response Date: 3 �� <br /> RB Staff: PAT ANDERSON ` Response: CONCURRENCE <br /> Title: HYDROGEOLOGIST <br /> VII. Additional Comments, Data,etc. <br /> is <br /> This document and the related CASE,CLOSURE LETTER,Shall be retained by the lead agency as part of the officia{ Fi <br /> site file. <br />