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PUBLIC HEALTH SERVICES OpOUlry <br /> SAN JOAQUINC UNTY <br /> JOGI KHANNA M.11.,MRH, N <br /> ` Health Offic r <br /> P.O. Box 2049 . (1601 East Hazelton Avenue) Stockton,California 95201 <br /> c9tr�oaa�P <br /> (209) 468-32:00 <br /> October 1, 1990 <br /> Ken Olds Q <br /> Lammersville School District <br /> 16555 W. Von Sosten Road v <br /> Tracy, CA 95376 <br /> RE: Lammersville School Dist. IN REPLY REFER TO SITE CODE: 1749 <br /> 16555 W. Von Sosten Rd. <br /> Tracy, CA 95376 <br /> Our review of your Problem Assessment. Report dated July 16, 1990 is <br /> complete. <br /> No petroleum hydrocarbons were detected in the analyzed soil <br /> samples for MW #7A and MW #8A and minor amounts of contamination <br /> were detected for MW #6A. However, during a site inspection on <br /> July 19 , 1990, it was noted that soil sampling was not conducted in <br /> accordance with the LUFT Manual Guidelines. Specifically, the <br /> brass cylinders were not covered with aluminum foil prior to <br /> placement of end caps for samples MW #7A and MW #8A. The brass <br /> cylinders were not placed in the split spoon sampler for MW #6A so <br /> the sample was hand packed. In addition, odor and discoloration <br /> were noted during the sampling. Therefore, the soil sample results <br /> are not recognized as being representative of the subsurface <br /> conditions. <br /> Additional soil sampling will be necessary to delineate the extent <br /> of lateral petroleum hydrocarbons in the soil. <br /> A work plan for the continued soil contamination characterization <br /> should be submitted to our office y November 21, 1990. Also, <br /> quarterly monitoring of the wells is to continue with the next <br /> sampling to be performed in September. A 48 hour notification is <br /> required prior to any field activity , including water sampling. <br /> A Division of San Joaquin County Health Care Services <br />