Laserfiche WebLink
Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> Barrels Various purged amts. Seaport Environmental, 700 Seaport Blvd., Redwood City, CA 2010-2011 <br /> III. Release and Site Characterization Information continued <br /> Maximum Documented Contaminant Concentrations-- Before and After Cleanup <br /> Contaminant Soil Before (ppm) Water (ppm) Contaminant Soil Before (ppm) Water (ppm) <br /> After Before After After Before After <br /> TPH (Gas) 3000 NA 26 1.44 Xylene 230 NA 1.0 <0.0015 <br /> TPH (Diesel) 40000 NA 0.111 NA Ethylbenzene 30 NA 0.25 <0.0005 <br /> Benzene 0.088 NA 0.024 <0.0005 Oil&Grease NA NA NA NA <br /> Toluene 17 NA 0.53 <0.0005 Heavy Metals Pb 9.1 NA NA NA <br /> MTBE 124 1 NA 144 11.740 <br /> Comments: The Soil Before Concentrations: TPH-g, TEX from sample GT3-B 16', Pb from GT3-C collected at 16'on <br /> 0210411998; TPH-d from sample TD-1 collect under fuel dispenser island, depth unknown on 11/08/1994-, B from S-10-B2 at <br /> 10' Dec.1992; MTBE from sample GT3-A at 16' collected on 0210411998. No Soil After Concentrations are available. The <br /> Ground Water Before Concentrations: TPH-g and MTBE are from MW-3 collected on 10111102; TPH-d from CPT-1d78 at 78 <br /> feet on 0111012011; B from MW-5 collected on 10111106; TE are from MWA collected on 10111102; X from MWA collected <br /> on 07111103. The Ground Water After Concentrations are from MW-5 collected on 06102111. <br /> IV. Closure <br /> ff!tt ed 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/Remediation Wells Decommissioned?Yes Number Decommissioned: 7 Number retained: 0 <br /> List enforcement actions taken: NORs sent to the RPs <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: Donna Heran, REHS Title: Director <br /> Signatur . Date: <br /> VI. Central Valley Regional Water Quality Control Board RB Notification <br /> Date Submitted to RB: Response Date: 06/13/2012 <br /> RB Staff: J. Barton Response: No Further Action Required Concurrence <br /> Title: Eng, Geologist <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 site file. <br />