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Case Closure Summary Page 2 <br />Leaking Underground Fuel Storage Tank Program <br />III. Release and Site Characterization Information (continued) <br />Maximum Documented Contaminant Concentrations --Before and After <br />Cleanup <br />Does corrective action protect public health for current land use? Yes <br />Contaminant <br />Soil <br />(ppm) <br />Water## (PPB) <br />Contaminant <br />Soil <br />(ppm) <br />Water## (PPB) <br />List enforcement actions rescinded: NONE <br />Before <br />After <br />Before After <br />Before <br />After <br />Before After <br />TPH (Gas) <br />960.0 <br />35.0 <br />800.0 <br /><50.0 <br />Xylene <br />7.90 <br />0.33 <br />41.0 <br /><0.50 <br />TPS (Diesel) <br />2300. <br />430.0 <br /><50.0 <br /><50.0 <br />Ethylbenzene <br />0.20 <br />0.085 <br />16.0 <br /><0.50 <br />Benzene <br />0.90 <br /><0.070 <br />8.6 <br /><O.50 <br />Oil & Grease <br />---- <br />---- <br />---- <br />---- <br />Toluene <br />0.98 <br />0.043 <br />13.0 <br /><0.50 <br />Heavy metals <br />27.0 <br /><5.0 <br />--- - <br />---- <br />Other (EDB) <br /><0.01 <br />---- <br />---- <br />---- <br />## water res <br />lts fro <br />wells <br />my ## <br />Comments (Depth of Remediation, etc.): <br />BULK OF IMPACTED SOIL REMOVED BY OVER -EXCAVATION. GROUNDWATER <br />SAMPLES <br />FROM WELLS SHOW <br />NO CONTAMINATION. <br />THE ESTIMATED VOLUME OF DIESEL AND BENZENE REMAINING IN THE SOIL BE- <br />NEATH THE BUILDING <br />ARE 3.0 GALLONS AND 0.0019 GALLONS, <br />RESPECTIVELY. <br />IV. Closure <br />Does completed corrective action protect existing beneficial uses per the Regional Board <br />Basin Plan? Yes <br />Does completed corrective action protect potential beneficial uses per the Regional Board <br />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? No <br />Monitoring wells Decommisioned: YES Number Decommisioned: 3 <br />Number Retained: 0 <br />List enforcement actions taken: INITIAL DIRECTIVE LETTER <br />List enforcement actions rescinded: NONE <br />V. Local Agency Representative Data <br />VI. RWQCB Notification <br />Date Submitted to RB: 01-12-95 RB Response: NONE <br />RWQCB Staff Name: BETH THAYER Title: STAFF ENG Date: <br />VII. Additional Comments, Data, etc. <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 />