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%WOI .,.� <br /> Page 2 <br /> Case Closure Summary <br /> Leakin Under rouvarious purged arrmtsk P Seapro orFuel Stort Environmental�eapcit Blvd., Redwood City, CA 2010-20 <br /> Barrels <br /> Ill. Release and Site Characterization Information continued <br /> Before and After Cleanup <br /> Maximum Documented Contaminant Concentrations-- Water (ppm) <br /> Soil Before (ppm) Water (ppm) Contaminant Soil Before After) Before After <br /> Contaminant After Before After NA 10 <0.0015 <br /> 26 1.44 Xylene 230 NA 4.25 <0.0005 <br /> TPH (Gas) 3000 NA NA Ethylbenzene 30 NA <br /> 40000 NA 0.111 NA NA <br /> TPH {Diesel) NA 0.024 <0.0005 Oil&Grease NA NA NA NA <br /> Benzene 0.088 <0.0045 Heavy Metals Pb 9.1 1 740 <br /> 17 NA 0.53 24 NA 44 <br /> Toluene MTBE <br /> Comments: The Soil Before Concentrations: TPH-g, TEX from sample GT3-8 16', Pb from GT3-C colleted at 16'on <br /> own on I I lo <br /> 02/04/1998; TPH depth unkri <br /> -d from sample TD-1 collect under fuel dispen2sla���998' No 5o11 After Concentrations areava able.OTheat <br /> at 78 <br /> 10' Dec.1992; MTBE from sample GT3-A at 16 collected anfrom CPT-I <br /> Ground Water Before Concentrations: TPH-g and MTBE are <br /> are from MW-111ectedCted o�1101a 1102P X f from MW 1 collected <br /> t d <br /> feet on 0111012011; B from MW-5 collected on 10111106, <br /> on 07111@3. The Ground Water After Concentrations are from MW-5 collected on 06102111. <br /> N. Closure <br /> protect existing beneficial uses per the Regional Board Basin Plan? es <br /> Does completed corrective action <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? No Number Decommissioned: 0 <br /> Number retained: 7 <br /> List enforcement actions taken: NORs sent to the RPs <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data Title: Acting Program Coordinator <br /> E-]drienne Ellsaesser, RENS <br /> e ��� Date: <br /> VI. Central Valley Re ional Water Quality Control Board RB Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: J. Barton Response: <br /> Title: Eng. Geolo ist <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 />