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Case Closure Summary <br /> Leaking.Underground Fuel Storage Tank Program <br /> III. Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations-- Before and After Cleanup <br /> II Soil Before (ppm) Water (ppm) - Contaminant Soil Before (ppm) <br /> Ctinant Ager Before AWater (Ppm) <br /> Contaminant'i After Before After <0.20 <0.002 <br /> <20.0 0.21 Xylene 14.0 <br /> TPH Gas . 1,000 <0.20 <0.002• . <br /> (Gas) <br /> NA NA NA Ethylbenzene 0.3 NA NA <br /> TPH (Diesel) <f1.20 40.001 Oil&Grease NA <br /> Berizene <0-025 2.1 NA NA <br /> <0.20 40.002 Pb 0.39 <br /> Toluene 0,2 MTBEL SAMPLE(TP-1121)92.9 120 <br /> ED <br /> T 21 <br /> Comments: THE SOIL BEFORE CONCENTRATIONS. XCEPT MBI= SOARE FROM A IL CONCENTRATION SOFROM iSB--1AT 25 FEET . <br /> BGS BENEATH UST AT THE TIME OF REM OV <br /> WERE NOT TAKEN AFTER THE <br /> BGS IN THE AREA OF <br /> FORMER USTs. ILEXTRACTIONCON ATION SAT REAMPLEMEDIATION. ND WATER BEFORE AND AFTER <br /> COMPLETION OF T GROUND WATER <br /> CONCENTRATIONS ARE FROM WELL P-1 LOCATED 5 FEET WEST OF THE FORMER USTs. <br /> IVF,:� <br /> closure <br /> completed corrective action protect existing beneficial uses per the Regional Board Basin Plan?'YES <br /> completed corrective action protect potential beneficial uses per the Regional Board Basin Plan?YES <br /> corrective action protect public health for current land use?YES <br /> E <br /> management requirements: NA <br /> i <br /> Should corrective action be reviewed if land use changes?YES <br /> Monitoring/Vapor wells Decommissioned: Yes Number Decommissioned: 20 Number retained: 0 <br /> List enforcement actions taken: NOR SENT TO RP <br />{ <br /> List enforcement actions rescinded: NA <br /> W Local Agency Representative Data <br /> 1 Title: Director <br /> [&gnature.ure-. <br /> me: Donna Heran, RENS <br /> Date: j <br /> VI. Central Valley Regional Water Quality Control Board RB Notification <br /> i Date Submitted to RB: 12/13/2011 Response Date: 12/21/2011 <br /> RB Staff: J. Barton Response: No Further Action Required Concurrence <br /> i. Title: Eng. Geologist <br /> VII. Additional Comments, Data, etc. <br /> s <br /> A <br /> This document and the related CASE. CLOSURE LETTER shall be retained by the lead agency as pari of the official site file. <br /> I <br /> Page-2. - <br />