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Cecchini Cecchuu, and Govannoni, Fueling Island <br /> method 503018015, and for benzene, ethylbenzene, toluene, and xylenes (BTEX) using EPA <br /> method 5030/8020 Soils encountered in the three borings consist of interbedded fine materials <br /> ranging from silty sands to sandy silts to the depths explored From the surface, the soils consist <br /> of sandy silt (ML) to a depth of about 15 feet bgs Silty sand (SM) was logged between the <br /> depths of 15 feet bgs to 30 feet bgs Sandy silt (ML) was logged between 30 feet bgs and 65 feet <br /> bgs with increasing amounts of sand between 65 feet bgs and 80 feet bgs A coarse, poorly- <br /> graded medium sand (SP) was encountered between 80 feet bgs and 85 feet bgs On April 11, <br /> 1995, ESE personnel supervised the development of each new monitoring well by Spectrum <br /> Drilling Services Well development consisted of surging and removal of fines using a steel <br /> bailer On April 14, 1995, ESE personnel returned to the site to supervise additional purging of <br /> the wells by Automated Environmental Services Well development and purging was completed <br /> by the recovery of clear ground water after 60 gallons had been removed from UST-2, 60 gallons <br /> from UST-3, and 45 gallons from UST-4 A survey of the top of casing elevations of all wells <br /> onsite was made by Frame Surveying & Mapping, of Davis, California Top of casing elevations <br /> ranged from 27 64 feet to 30 15 feet relative to City of Stockton Benchmark No 191 <br /> f 169254001gtrly rptl4gtt95 rpt 3 FAvironmental Science&Engineering, Inc <br />