Laserfiche WebLink
rr r f <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 Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> ITPH(Gas) 7000 <1 .130 <.050 Xylene 590 <0.005 0.0095 <0.0005 <br /> TPH(Diesel) na na na ne Ethylbenzene 90 <0.005 0.0014 <0.0005 <br /> Benzene 3.5 <0.005 <0.0005 <0.0005 Oil&Grease na na na na <br /> Toluene <50 40.005 0.0019 <0.0005 Heavy Metals Pb 11 na na na <br /> MTBE 0.024 <0.005 0.0024 +W.0005 <br /> Comments: The soil before concentrations are from a sample collected at the time of UST removal at 14 ft. BGS. The soil <br /> after concentrations are from soil boring(SB-1)near UST release. The before concentrations for water are from a grab <br /> water sample at 80 feet from SB-1, MTBE is from MW-3 on 9/18103 which is the nearest well to SB-1 the area of the <br /> release. The after concentrations for groundwater are from downgradient MW-1. 60 cubic yards of soil were removed from <br /> the southern end of the western dispensers and aerated on-site. No other active remediation has occurred at this site. <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: NA <br /> Should corrective action be reviewed if land use changes? NO <br /> Monitoring/Vapor wells installed: YES Number Decommissioned: 4 Number retained: 0 <br /> List enforcement actions taken: Level one, NOR sent to RP <br /> List enforcement actions rescinded: NA <br /> V. Local Agency Representative Data <br /> Name: Donna Heran, REHS Title: Director, Environmental Health Department <br /> Signature: Date: <br /> VI. Central Valley Regional Water Quality Control Board(RB)Notification " <br /> Date Submitted to RB: 10/02/03 Response Date: 10/16/03 <br /> RB Staff:J.Barton Response: No further action required <br /> Title:Assoc En Geo! !st <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 official <br /> site file. <br />