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1 <br /> Delta <br /> �. Environmental <br /> Consultants , Inc. <br /> 3330 Data Drive <br /> Rancho Cordova , CA 95670 <br /> 916/638-2085 <br /> FAX: 916/638-8385 <br /> December 22, 1989 <br /> Ms. Eleanor Ratliff <br /> San Joaquin Local Health District <br /> 1601 East Hazelton Avenue <br /> Post Office Box 2009 <br /> Stockton, California 95201 <br /> Subject: Water Sampling <br /> Interstate 205 and Grant Line Road, Tracy, California <br /> Delta Project No . 40-89-052 <br /> Dear Ms. Ratliff: <br /> This letter presents the results of drilling and water sample collection at the site on November 15 , 1989. <br /> The work described herein is being performed in conjunction with a possible property transfer. Enclosed <br /> are the soil boring logs and copies of certified laboratory reports , <br /> Three soil borings were advanced to depths ranging from 7 to 10 feet below grade in order to obtain <br /> ground water samples. Sample collection was attempted with a hydropunch, but was unsuccessful because <br /> soils underlying the site are predominantly fine-grained (silts and clays) . Ground water samples were <br /> collected using new disposable bailers . Following collection in 40 milliliter VOA vials, samples were <br /> immediately sealed, labeled, and stored on ice until delivered to a state-certified laboratory for analysis <br /> of total petroleum hydrocarbons (TPH) , and benzene, toluene, xylene, and ethylbenzene by U. S . <br /> Environmental Protection Agency Methods 8015 and 8020, respectively. <br /> Upon completion of drilling and sampling activities , each soil boring was backfilled to ground surface with <br /> bentonite chips , as indicated on the soil boring logs . <br /> The results of chemical analysis are presented in Table 1 (enclosed) . The results of chemical analysis for <br /> soil borings SB -7 and SB -9 showed levels below the detection limit for TPH and benzene. The analytical <br /> results from soil boring SB -8 showed a benzene level below the detection limit and a TPH concentration <br /> of 0. 16 parts per million. <br /> Please contact me at (916) 638-2085 if you have any questions or concerns regarding this site. <br /> Sincerely, <br /> DELTA ENVIRONMENTAL CONSULTANTS, INC. <br /> t <br /> Erin Dougherty D E D 2 7 tv } 3 <br /> Project Manager EN / fP ' :' " <br /> ED : ecd <br /> Enclosures <br /> Practical Solutions to Environmental Concerns <br />