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OCT--10-2003 00.39 FROM 7 ELEVEN, INC. TO 918012667110-20470 P-04/05 <br /> r <br /> Case Closure Summary Page 2 <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 /> Contaminant Sail (ppm) Water (ppm) Contaminant Soil (ppm} Water (p <br /> Before After Before After Before lAfter Before At <br /> TPH(Gas) 1300 <01 1940 0.030 Xylene 850 <0 001 45 <{ <br /> TPH(Diesel) na na na na Ethylbenzene 18 <0 001 <0 030 d <br /> Benzene 57.0 -0.001 -0.030 <0 0005 oil&Gmse na na na n, <br /> Toluene <1 D -0.001 <0.030 a0.0005 Heavy Metals Pb=5 3 Pb---5.3 na n. <br /> NITBE 50.50 0.026 A26 0 <br /> Comments;The soil before values are from samples collected at 14 feat BGS at the time of USTs removal The soil a <br /> values are from samples In sod boring GP-3 near the former USTs The before water values are from the grab sample <br /> callected from GP-3 and the after values are from the nearest downgradient MW-3 on 4117/03-The only actrve remedi, <br /> that occurred at tris site was the removal of 450 cubic yards of soil from the former UST area <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 Plan'? Yes <br /> Does corrective action protect public health for current land use? Yes <br /> Site management requirements none <br /> Should corrective action be reviewed If land use changes?no <br /> Monitoring/Vapor wells .3 Number DecommMioned 0 Number retained 3 <br /> List enforcement actions taken level one, NOR sent to RP <br /> List enforcement actions resccnded,na <br /> V Local Agency Representative Data <br /> Name: Margaret Lagorno Title: Supervising REHS:Site MitigationtLOP Unit IV <br /> Signature Date 10! d <br /> Vi Central Valley Regional Water Quality Control Board (RB)Notification <br /> E <br /> bmittalto RB Response Date:' <br /> J Barton Response <br /> soc En GnlqqLst <br /> 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 a <br /> site file. <br />