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Name: DONNA CRAN <br />11 <br />Title: DIRECTOR OF ENVIRONMENTAL HEALTH <br />Date: <br />RB Response: Date Submitted to RB: <br />Date: Title: RWQCB Staff Name: <br />SOIL ONLY <br />RWQCB Notification <br />711. Additional Comments, Data, etc. <br />se Closure Summary Page 2 <br />Leaking Underground Fuel Storage Tank Program <br />Release and Site Characterization Information (continued) <br />Maximum Documented Contaminant Concentrations--Before and After Cleanu <br />Contaminant Soil (ppm) <br />Before After <br />Water (ppm) <br />Before After <br />Contaminant Soil (ppm) <br />Before After <br />Water (ppm) <br />Before After <br />TPH (Gas) 1.4 1.4 N/A N/A Xylene .100 .10 N/A N/A TPH (Diesel) 7600 500 Ethylbenzene <.0026 Benzene <.0026 <.0026 Oil & Grease 210 210 Toluene <.0026 <.0026 Heavy metals Other PCB .110 N/A Other <br />Comments (Depth of Remediation, etc.): <br />ONE LARGE EXCAVATION 250' LONG X 50' WIDE X 6' DEEP SURROUNDING AN EXCAVATION 100' LONG <br />X 10' WIDE X 20' DEEP BENEATH THE 25,000 GALLON DIESEL TANK. <br />ONE SMALL EXCAVATION 40' LONG X 12' WIDE X 9' DEEP BENEATH THE 10,000 GALLON WASTE <br />WATER TANK. ONE 350' WASTE WATER PIPELINE GROUTED IN PLACE. <br />RESIDUAL CONTAMINATION IS BELOW LUFT MAXIMUM ALLOWABLE LEVEL FOR TPH-d BENEATH THE <br />CONCRETE SLAB FOUNDATION FOR THE SAND TOWER, AND FOR OIL & GREASE BENEATH THE WASTE WATER11 <br />PIPELINE. <br />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 <br />Should corrective action be reviewed if land use changes? Yes (No) <br />Monitoring wells Decommissioned: Yes No Number Decommissioned: Number Retained: <br />List enforcement actions taken: NOTICE OF REIMBURSEMENT <br />List enforcement actions rescinded: NONE <br />Local Agency Representative Data <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