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1444 MARIPOSA ROAD <br /> WKA No 293 8 03 <br /> September 23, 1996 <br /> Page 2 <br /> using modified EPA method 8015, and Benzene, Toluene, Ethylbenzene, and Total Xylenes <br /> (BTEX) using EPA method 602 A clean "travel blank" of distilled water was transported along <br /> with the water samples for the purposes of detecting cross-contamination from field activities All <br /> water removed during purging operations was placed in sealed, labeled 55 gallon drums and <br /> stored on-site <br /> Results of laboratory analysis of the water sample obtained from MW 1 revealed detectable <br /> concentrations of TPH as gasoline (484 parts per billion (ppb)), benzene(15 6 ppb), toluene (2 9 <br /> ppb), ethylbenzene (1 0 ppb), and total xylenes (3 3 ppb) Analytical results of laboratory analysis <br /> of the water sample obtained from MW2 revealed detectable concentrations of TPH as gasoline <br /> (313 ppb), benzene (24 2 ppb), toluene (2 1 ppb), ethylbenzene(0 8 ppb), and total xylenes (1 9 <br /> ppb) Total petroleum hydrocarbons as diesel and motor oil were not detected in water samples <br /> obtained from MW 1 and MW2 Analysis of water samples obtained from MW3 revealed no <br /> detectable concentrations of TPH as gasoline, diesel , motor oil, or BTEX at or above the <br /> reported laboratory method detection limits Sample analytical results are summarized in Table 2 <br /> . Complete laboratory reports and chain-of-custody documentation are appended <br /> Please call if you have any questions regarding this report <br /> Wallace ■ Kuhl & Associates, Inc <br /> Matthew A Taylor Eric Hubbard <br /> Senior Staff Engineer Registered Geologist #4807 <br /> Copies to Mr Steve Sasson, San Joaquin County Public Health Services <br /> Mr John Furman, US Rentals <br /> MUdw%12938&03 QTS <br /> 0 <br /> WALLACE-KUHL <br /> ReQ,-apa, BASSQCLMMS INC <br />