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cl iii <br /> Mr Harlin Knoll <br /> Page 2 of 2 <br /> • <br /> ANALYTICAL RESULTS <br /> No analytes of concern were detected in wells MW3, MW4, and MW9 Well MWI contained TPHg at a <br /> concentration of 150 ppb, benzene at 1 5 ppb, ethylbenzene at 9 5 ppb, and xylenes at 4 9 ppb Well MW5 <br /> contained TPHg at a concentration of 42,000 ppb, benzene at 1,700 ppb, toluene at 910 ppb, ethylbenzene <br /> at 1,900 ppb, and xylenes at 15,000 ppb Analytical results are summarized in Table 3 Benzene <br /> concentrations in site wells are shown on Figure 3 Laboratory data sheets and chain of custody <br /> documentation are included in Attachment B Attachment C contains a graphical representation of TPHg <br /> and benzene concentrations over time in wells MW 1 and MW5 The chart shows an overall decreasing <br /> trend of contaminants since historic high levels were detected in December 1996 <br /> Please contact John Lane at(209) 838-9888 if you have any questions or comments regarding this report <br /> Respectfully, <br /> Ground Zero Analysis, Inc <br /> J�— VoAd <br /> Joseph L Vasquez ¢ <br /> Staff Geologist �= <br /> o U,jv[ <br /> John P Lane <br /> CA Registered Geologist 6795 ph Cry ` 4 <br /> Attachments y <br /> cc Mr James L L Barton, CRWQCB <br /> Mr Carl Knowles <br /> Mr Patrick D Riddle, Attorney at Law <br /> G IGROZ INDMICNOWLES HAMIREPORTSIQMR12005UQM2005 doc <br />