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4 Cas* Closure Summary Page 2 <br /> Leaking ,�dsrground Fuel Storage Tank Pam <br /> III. Release and site Charac zation Information (continued) <br /> Maximum Documented Contaminant Concentrations--Before and After Cleanup <br /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Bofors After Before After <br /> TPH (Gas) 4000 4000 0 .14 Xylene 91 91 0 0 <br /> TPH (Diesel) 2000. 2000. 0 .15 Ethylbenzene 37 37 0 0 <br /> Benzene 0 0 0 0 Oil S Grease 0 0 0 0 <br /> Toluene 7.3 7.3 0 .0015 Heavy metals 0 0 0 0 <br /> Kerosene 1390 0 0 0 Other 0 0 0 0 <br /> Comments (Depth of Remediation, etc.) : <br /> TPHG AND DIESEL IN SOIL WERE UNDER HARDING WAY (OFFSITE TO NORTH) AND IN HEAVY CLAYS. <br /> TPBG AND DIESEL IN WATER WERE QUANTIFIED AS MOTOR OIL RANGE, NOT CONSISTENT W/ DIESEL <br /> R GAS CHROMATOGRAMS. <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 <br /> Should corrective action be reviewed if land use changes? Yes (No) <br /> Monitoring wells Decommisioneds NOT YET Number Decommisioned: Number Retained: 7 <br /> List enforcement actions taken: NONE <br /> List enforcement actions rescinded: N/A <br /> V. Local Agency Representative Data <br /> Name: DO EWAN Title: DIRECTOR OF ENVIRONMENTAL HEALTH <br /> Signature: = JJIL �r. , L <br /> Date: <br /> VI. RWQCB Notification <br /> Date Submitted to RB: RB Response: <br /> RWQCB Staff Name: Title: Date: <br /> VII. Additional Comments, Data, etc. <br /> PHS/EHD TRC CONCLUDED IN CORRESPONDENCE DATED OCTOBER 26, 1994 THAT "NO FURTHER SUBSURFA <br /> INVESTIGATION IS REQUIRED FOR ONSITE OR OFFSITE AREAS. THE TRC ALSO DECIDED THAT NO <br /> REMEDIATION IS REQUIRED FOR SOIL OR GROUNDWATER CONTAMINATION STILL IN PLACE ON OR OFFSIT ." <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 />