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ne Closure Sum=ary Page 2 <br /> 0 <br /> Leakin erground Fuel Storage Tank Pr -m <br /> Release and Site Charac zation Information (continued),77-' <br /> Maximum Documented Contaminant Concentrations--Before and After Cleanup <br /> Contaminant Soil {ppm.} Water (PPB) Contaminant Soil (ppm) Water (PPB) <br /> Before After Before After Before After Before After <br /> TPH (Gas) 27.0 ??? ---- ---- Xylene 5.1 0.012 <0.5 <0.5 <br /> TPH (Diesel) 690.0 2.7 370 <50 Ethylbenzene 0.91 0.019 <0.5 c0.5 <br /> Benzene c0.25 <0.25 0.4 <0.5 Oil & Grease -_-- ---- --_- --- <br /> Toluene. c0.25 0.007 0,.8 <0.5 Heavy metals ---- ---- 12.0 ---- <br /> Other Other <br /> Comments (Depth of Remediation, etc. ) : <br /> APPROXIMATELY 158 CII YDS SOIL REMOVED BY EXCAVATION. LOW LEVELS OF SOIL CONTAMINATION <br /> REMAIN.GROUNDWATER INVESTIGATION WAS NOT CONDUCTED BUT RECENT RESAMPLING OF A PREVIOUSLY <br /> IMPACTED DOMESTIC WELL SHOWED NO CURRENT IMPACT. <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board <br /> Basin Plan? PROBABLE <br /> Does completed corrective action protect potential beneficial uses per the Regional Board <br /> Basin Plan? PROBABLE <br /> Does corrective action protect public health for current hand use? PROBABLE <br /> Site management requirements: NONE <br /> Should corrective action be reviewed if land use changes? NO <br /> Monitoring wells Decommissioned: NO Number Decommissioned Number Retained:01 <br /> List enforcement actions taken: INITIAL DIRECTIVE LETTER, SEVERAL ENFORCEMENT LETTERS <br /> €List enforcement actions rescinded: NONE <br /> V. Local Agency RepresentativeData <br /> Name: DO A HE Title: DIRECTOR, ENVIRONMENTAL HEALTH DIVISION <br /> Signature Date: 02-42-19(o <br /> VI. RWQCB Notification <br /> LRWQC <br /> Stted to RB: RB Response: <br /> B Staff Names BOGGS Title: UST MANAGER Date: <br /> VIZ. Additional Comments, Data, etc. <br /> GROUNDWATER INVESTIGATION DIRECTIVE APPEALED TO SWRCB THROUGH PETITION PROCESS. <br /> A COMPROMISE OF ESTABLISHING CURRENT IMPACT AT SITE WAS MADE. NO FURTHER ACTION <br /> TO BE REQUIRED IF CONDITIONS REMAIN THE SAME OR BETTER. THESE CONDITIONS HAVE BEEN <br /> MET. NO FURTHER ACTION DETERMINATION MADE AT THIS TIME. <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 Paige 2 of 2 <br />