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'Case Closure Summary Page 2 f <br /> Leaking Underground Fuel Storage Twprogram <br /> Ili 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 /> IPP ) <br /> Before After Before After Before After Before After <br /> TPH (Gas) 3400 3400 1.5 ND Xylene 142 142 .160 ND <br /> TPH (Diesel) NIA NIA NIA NIA Ethylbenzene 660 660 .140 ND <br /> Benzene 79 79 .890 ND Oil&Grease 21 21 t ND <br /> Toluene 500 500 0.014 ND Hearty Metals 49 49 N/A <br /> MTBE LINK UNK UNK C005 Lead 11.0 11.0 NIA <br /> Comments: (Depth of Remediation, etc.): SOIL EXCAVATION OCCURED TO 20' BGS. SOIL SAMPLE AT 20' BGS ON i{ <br /> EAST EDGE OF PROPERTY (TP-1) CONTAINED HIGHEST RESIDUAL SOIL CONTAMINATION. 4 MWS INSTALLED; <br /> CONCENTRATIONS OF GASOLINE IN GROUNDWATER TO ND. <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 �I <br /> f <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: NO Number Decommissioned: 0 Number retained: 3 <br /> List enforcement actions taken:. NOR SENT <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: MARGARET LAGORIO Title:SUPERVISING REHS/SITE MITIGATION-LOP UNIT <br /> Signature:._. Date: b f <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: MIT 10 1991 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, Shall be retained by the lead agency as part of the official <br /> site file. <br /> 1 <br />