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CET <br /> CONDOR EARTH TECHNOLOGIES INC. <br /> May 8, 2002 188 Frank West Circle <br /> Suite I <br /> Stockton, CA 95206 <br /> (209) 234-0518 <br /> FAX (209) 234-0538 <br /> County of San Joaquin Building Department <br /> 1810 East Hazelton Avenue <br /> Stockton, California 95205 <br /> RE: Excavation Backfill Compaction Testing at 3624 S. Airport Way, Stockton <br /> Condor Project No. 3523D <br /> Gentlemen, <br /> The attached documents verify the compaction testing performed by Condor Earth Technologies, <br /> Inc. (Condor) at the site located at 3624 S. Airport Way in Stockton, California. An area of the <br /> site was backfilled and compacted after the excavation and removal of one underground storage <br /> tank (UST)from the site. The excavation was backfilled with native material removed during the <br /> excavation and other site surface soil. Nuclear density testing was performed to monitor <br /> compaction of the fill. <br /> The average compaction for the backfill is approximately 86% relative compaction.Given the <br /> imminent development of the site for use as an industrial park and the extensive groundworking <br /> activities necessary for such development, it is Condor's opinion that the backfill compaction <br /> performed on April 9, 2002 and based on the existing ground conditions (see Condor <br /> Geotechnical Engineering Study, dated April 12, 2002) meets the requirements of the Backfill <br /> Excavation Certificate. <br /> If you have any questions,please feel free to contact us at(209)234-0518. <br /> Sincerely, <br /> CONDOR EARTH TECHNOLOGIES, INC. <br /> Reviewed by, <br /> Michael McRivette Ronald L. Skaggs <br /> Environmental Specialist Geotechnical Engineer(CA#2295) <br /> PA3523D Massie Park Tank Removal\Correspondence\Compaction Ur 5-8-02.doe <br /> ENVIRONMENTAL GEOLOGICAL ENGINEERING GEOTECHNICAL <br /> http://www.condorearth.com <br />