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-.swt• .€w�•: ,w- T .�...: ^w..:�s>—?e. ,k:+n^_+�s. . .-�..,•--- .:.« :.-.x:�s•_..- -- .s...assn's - - -' - <br /> 1117 Lone Palm Avenue <br /> Suite B <br /> - Modesto, CA 95351 <br /> 209.579.2221 <br /> Fax 209.579.2225 <br /> jam} A S S O C I A T E S I N C , <br /> 4 <br /> n -1 t <br /> September 20, 1999 <br /> 54.17292.0004 <br /> Mr. Jeff Wong <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 E. Weber Street, Third Floor <br /> Stockton, California 95202 <br /> Subject: Additional Analytical Reporting for Edison High School, 1425 South Center <br /> Street, Stockton, California <br /> Dear Mr. Wong: <br /> ATC Associates Inc., on behalf of the Stockton Unificd School District, has prepared this <br /> y correspondence in order to submit additional laboratory results associated with soil samples <br /> previously collected at the above referenced project site. On February 16, 1999, soil samples <br /> were collected in the vicinity of the project site's former diesel underground storage tank. These <br /> samples were subsequently. submitted to Sequoia Analytical laboratory and analyzed for total <br /> petroleum hydrocarbons as diesel (TPHd), benzene, toluene, ethylbenzene, and xylenes (BTEX) <br /> by EPA Methods 8015M/8020. Field activities and laboratory results are summarized in ATC's <br /> Summary Report ofAdditional Subsurface Investigation (Summary Report) dated June 2, 1999. <br /> Following a review of ATC's Summary Report, Sa Joaquin County Public Health Services, <br /> Environmental Health Division recommended the soil samples collected from soil borings SBI <br /> and SB2 be read and interpreted for the presence of methyl tertiary butyl ether (MTBE). This <br /> recommendation was made in order to satisfy Health and Safety Code § 25299.37.1 <br /> requirements. <br /> At the request of ATC, Sequoia Andlytical reviewed and interpreted chromatograms of the soil <br /> samples for the presence of MTBE. Sequoia Analytical concluded MTBE was not present in the <br /> soil samples above laboratory detection limits. <br /> Analytical results are summarized on Table 1. Revised laboratory data sheets are included as <br /> Attachment 1. <br /> wA17292\17292.0311ettersladd 1ab.doc 1 <br />