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'7.,`"' Case Closure Summary Page`-" � r <br /> aking Underground Fuel Storage Tank Pr" m <br /> III Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations --Before and After Cleanup l <br /> i <br /> Contaminant Soil (ppm) m Contaminant Soil (ppm) Water . (ppm) <br /> m Water {pp ) <br /> Before After Before After Before After Beforel) After <br /> TPH(Gas) 78 5.9 4.8 Xylene ND .027 099 <br /> benzene <br /> ND Eth ND .010 .023 <br /> TPH(Diesel) 62 3.0 & NA <br /> Benzene ND ND .007 Oil &Grease NA 13 <br /> Toluene ND ND .004 Heavy Metals NA <br /> MTBE ND ND ND <br /> Comments: NO REMEDIATION PERFORMED ON SITE "AFTER" RESULTS ARE FRWA GEOPROBE <br /> INVESTIGATION DONE IN MARCH 2000. FIVE BORINGS WERE ADVANCED ON SITE. POSITIVE RESULTS WERE <br /> FROM THE BORING ADVANCED IN THE FORMER TANK PIT AREA, GP-1, EXCEPT FOR THE 13-PPM TPH-MO, <br /> WHICH WAS FROM GP-5. ALL OTHER BORINGS HAD NON-DETECT RESULTS FOR ALL SAMPLES ANALYZED. <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan? YES <br /> Does completed corrective action protect potential beneficial uses per the Regional Board Basin Pian? YES <br /> Does corrective action protect public health for current land use? YES <br /> J. <br /> Site management requirements: NONE <br /> Should corrective action be reviewed if'land use changes? YES <br /> Monitoring/Vapor wells decommissioned: 0 Number Decommissioned: 0 Number retained:.0 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: DONNA HERRN, REHS Title: DIRECTOR, ENVIRONMENTAL HEALTH DIVISION <br /> Signature: ` Date: -7J 3 —GU <br /> i <br /> V.I. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 05/08/00 Response Date: 06/09/00 <br /> I <br /> RB Staff: MARTY HARTZELL Response: CONCURRANCE <br /> Title: ASSOCIATE ENGINEERING GEOLOGIST <br /> 1 VII. Additional Comments, Data, etc. <br /> This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part of the official <br /> site file. <br />