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Mr Harlin Knoll <br /> • Page 2 of 2 <br /> ANALYTICAL RESULTS <br /> Well MW5 contained TPHg at a concentration of 36,000 ppb, benzene at 2,700 ppb, toluene at 3,300 ppb, <br /> ethylbenzene at 1,900 ppb, and xylenes at 10,000 ppb No groundwater samples were collected from the <br /> other site wells Analytical results are summarized in Table 3 Laboratory data sheets and chain of <br /> custody documentation are included in Attachment B Attachment C contains a graphical representation of <br /> TPHg and benzene concentrations overtime in well MW5 The chart shows an overall decreasing trend of <br /> contaminants since historic high levels were detected in December I996 <br /> SUMMARY <br /> Groundwater beneath the site during the reporting period ranged from approximately 38 51 to 40 15 feet <br /> btoc and generally flowed east-northeast The potentiometric surface at the site rose an average of 1 77 <br /> feet between September 17, 2004 and November 24, 2004 Contaminant concentrations in well MW5 have <br /> exhibited a declining trend since 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 /> jU'k— U 00 1 <br /> Joseph L Vasque ,�1Q`�� � C?� <br /> Staff Geologist <br /> JOHN P <br /> ��.. tin;_ <br /> No 6/95 <br /> John P Lane <br /> CA Registered Geologist 6795 <br /> OF <br /> Attachments <br /> cc Mr James L L Barton, CRWQCB <br /> Mr Carl Knowles <br /> Mr Patrick D Riddle, Attorney at Law <br /> G 1GR0UNOZ0KN0WLES HAMIREPORTSIQMR1200414QM2004 doc <br />