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Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> III Release and Site Characterization Information(continued) <br /> Ni W*Mn'Documat ed OwderWra>mt Concentradons--Before and After Cleamup <br /> Cadaminant Soil (ppm) Water (ppm) Contaminant SoH <br /> (PPm) Water <br /> Before After Before After swore After gyre After <br /> ITPH(Gas) 15,000 5,700 FP .430 Ethyftwwn 39 130 FP .014 <br /> TPH([> 26,000 17,000 FP 7.6 Xylene 1100 650 FP .008 <br /> serene 56 18 FP .0058 <br /> Tolw w 220 200 FP .0081 <br /> MTBE 005 <br /> Comments: Free product(FP) in MW 8, 10, 17 from August 1989 until October 1991. Water samples after for BTEX $ <br /> TPH-g were from MW 8,TPH-d were from MW17. Soil before for BTEX, B2(55.51,TPH-g UPLS(81),TPH-d SB2(35'). <br /> Soil after for BTEX$TPH-g SB6(24'),TPH-d SB3(21.5') <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? Yes <br /> Monitoring/Vapor wells decommissioned: Yes Number Decommissioned: 7 Number retained:37 <br /> List enforcement actions taken: NOR dated 9/13/90 <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: Margaret Lagono Title: Supervising REHS <br /> Signature: Date: 111 0( <br /> Vi. Central Valley Regional Water Quality Control Board(RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff:J.Brathovde Response: <br /> Title:Assoc Eng Geologist <br /> VII. Additional Comments, Data,etc. <br /> This document and the related CASE CLOSURE LETTER,Shalt be retained by the lead agency as part of the official <br /> site file. <br />