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PUBLIC HEALTH SER ICES <br /> SAN JOAQUIN COL;NTY ' <br /> JOGI KHANNA hf.D.hf.P.H. <br /> Heaith Officer ` <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) • Stockton, California 95201 <br /> (209) 468-3400 <br /> DON GOODRICH <br /> CONTI TRUCKING ` <br /> PO BOX 30488 J U L 0 2 1992 <br /> STOCKTON CA 95213 <br /> RE: 2660 Loomis Road SITE CODE 1652 <br /> Stockton, CA <br /> San Joaquin County Public Health Services, Environmental Health Division has reviewed the workplan for <br /> re-excavation submitted by Hess and Hess Construction, Inc. and has the following comments. <br /> In addition to the constituents listed in the workplan,the soil samples should also be analyzed for chromium <br /> and nickel. If the results are greater than or equal to 5.0 mg/kg and 10.0 mg/kg respectively,then the samples <br /> should also be subjected to the waste extraction test to determine the soluble portion of the metal(s). <br /> The citric acid extraction solution used in the waste extraction test should be substituted with deionized water <br /> to produce results more indicative of actual site conditions. <br /> The laboratory detection limits to be used for future analysis need to be as described in the Leaking <br /> Underground Fuel Tank Manual,namely 0.005 parts per million for benzene, toluene and ethylbenzene and <br /> 0.015 parts per million for total xylenes. <br /> Two confirmation soil samples are proposed in the workplan. The need for additional sampling may arise at <br /> the time of the re-excavation. Please provide sufficient sampling equipment to accomodate any additional <br /> sampling needed. <br /> The re-excavation can be scheduled to begin at any time. Please provide 48 hours advance notification to this <br /> office prior to any work at the site. <br /> If there are any questions please contact Linda Turkatte, REHS,of my staff at (209) 468-0339. <br /> Jogi Khanna, ., M.P.H. <br /> Health Off <br /> ne A. Cotulla, S, Program Manager <br /> nvironmental Health Division <br /> LAC/LT:Ib <br /> C, Don Litchfield <br /> Hess and Hess Construction, Inc. <br /> 3819 Duck Creek Drive <br /> Stockton, Ca 95215 <br /> A Division of 14n Joaquin County Health Care Services <br />