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Case Closure Summary Page 2 <br /> Leak' aderground Fuel Storage Tank Pram <br /> III. Release and Site Charac rixation Information (continued) <br /> WDocumentedcumented Contaminant Concentrations--Before and After Cleanup <br /> Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> NO 6.0 3.2 Xylene ND .176 <.001 <br /> ) ND 17.0 5.1 Ethylbenxene ND .058 <.0005 <br /> ND .150 <.0005 Oil & Grease ND <br /> ND .038 <.0005 Heavy metals pb ND <br /> Other <br /> Comments (Depth of Remediation, etc.) : <br /> No odors or soil discolorations noted at the time of the underground storage tank <br /> removal. <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board <br /> Basin Plan? Yes No <br /> Does completed corrective action protect potential beneficial uses per the Regional Board <br /> Basin Plan? Yes No <br /> Does corrective action protect public health for current land use? Yes No <br /> Site management requirements: None; no contaminants were found to be generated from <br /> the underground storage tank. <br /> Should corrective action be reviewed if land use changes? Yes No <br /> Monitoring wells Decommissioned: Yes No Number Decommissioned: Number Retained: 5 <br /> List enforcement actions taken: None. <br /> List enforcement actions rescinded: None. <br /> V. Local Agency Representative Data <br /> Name: Donn Bran Title: Environmental Health Director <br /> Signature: Date: <br /> VI. RWQCB Notification <br /> Date Submitted to RB: RB Response: <br /> RWQCB Staff Name: Title: Date: <br /> VIZ. Additional Comments, Data, etc. <br /> No soil contamination was detected in laboratory samples taken at the time of the tank <br /> removal. San Joaquin County Public Health Services, Environmental Health Division <br /> (PHS/EHD) field representative did not observe any deficiencies with the tank closure <br /> activities. Contaminants detected in the monitoring wells do not appear to be assoc- <br /> iated with the UST removal. Recommend site be closed; no further action. Site does <br /> not pose a significant threat to water quality. <br /> This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency <br /> as part of the official site file. (08/24/93) <br /> Exhibit N Page 2 of 2 <br />