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CTeologic, I Toc/Mtcs //W. <br /> 1101 7"'Street <br /> Modesto,California 95354 <br /> (209)522-4119/Fax#522-4227 <br /> Work Plan <br /> Tank Closure Investigation <br /> Address: <br /> 1610 N. Broadway <br /> Stockton, CA <br /> APN: 143-25-008 <br /> Project No. 1218.2 <br /> June 13, 2005 <br /> 1.0 INTRODUCTION <br /> The subject property consists of a parcel of land occupied by one commercial warehouse <br /> building and large gravel parking lot. In the County Assessors Records, for the years 1963 <br /> 1968 and 1974 is a listing of a 500 gallon underground fuel storage tank valued to the <br /> .. property. No record was found as to the disposition of the tank. Site inspection found <br /> evidence of what appears to be a former fill pipe plugged with concrete and a former pump <br /> dispenser pad capped with concrete. A magnetometer survey showed evidence of a small <br /> size tank oriented west of the fill pipe structure (refer to the attached site map). <br /> 2.0 PROPOSED INVESTIGATION <br /> To investigate the possibility that a former UST located on the west side of the building may <br /> have leaked fuel and impacted the soil with petroleum hydrocarbons, Geological Technics <br /> Inc. proposes drilling three GeflProbe boreholes to a depth of 20 feet. Continuous core soil <br /> samples will be collected and two samples from each borehole will be submitted to the lab <br /> for analysis. <br /> A drilling permit will be secured as necessary and the local regulatory agency will be notified <br /> 48 hours prior to commencing work. The subsurface will be cleared of underground utilities <br /> by notifying Underground Service Alert. <br />