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D&D Management Consultants, Inc, <br /> 8440 Hesket Court <br /> San Jose,CA 95123 <br /> (408)227-0308 <br /> E= <br /> ell <br /> � <br /> August 23, 1989 G 19 <br /> 1;,,? 6)9 <br /> San Joaquin Local Health District <br /> 40 ' . <br /> 1601 East Hazelton Ave. <br /> Stockton, CA 95205 <br /> Attention: Ms . Carol Oz <br /> Subject: 1250 South Wilson Way, Stockton, CA <br /> Dear Ms . Oz :. <br /> In accordance with our recent telephone conversation the following <br /> should answer your questions: <br /> 1. Driller for soil borings: <br /> Western Strata Exploration <br /> West Sacramento, CA 95691 <br /> ( 916 ) 373-1118 <br /> Note: They will be sending you directly a letter <br /> regarding C57 license and permit application. <br /> 2 . Certified Engineering Geologist on site will be: <br /> Mr. Lou Richardson <br /> Mountain View, CA 94043 <br /> ( 415 ) 967-1000 <br /> EG 1085 <br /> One soil sample form each boring hole will be obtained by a <br /> modified California Drive Sampler lined with brass tube liners . <br /> The sample will be collect approximately 2 feet below the invert <br /> of the tank. Once the sample is collected, each end of the <br /> cylinder will be covered with aluminum foil and then capped with <br /> a polyethylene lid, taped, and labeled. The sample will then <br /> be placed on ice for transport to the state certified laboratory. <br /> Formal chain-of-custody records will be maintained for each sample <br /> The laboratory ( IT Analytical Services ) will analyze each soil <br /> sample for TPH (gasoline) and BTX&E. The method of analysis <br /> is taken from EPA Methods 8015, 8020 and 5030. The samples will <br /> be examined using the purge and trap technique. Final detection <br /> will be by gas chromatography using a Flame Ionization detector <br /> as well as a Photo Ionization detector. <br />