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Soil samples were obtained at five ( 5 ) foot intervals during <br /> drilling of the UST borings, through the use of a split-barrel <br /> sampler advanced into the undisturbed soil by a 140 pound hammer <br /> repeatedly falling 30 inches. Pre-cleaned stainless steel liners <br /> were placed in the sampler to retain the soil. The blow counts <br /> necessary to advance the sampler were recorded for each 6-inch <br /> interval. Drilling and sampling equipment was thoroughly steam <br /> cleaned before drilling to prevent the introduction of off-site <br /> contamination. The sampling equipment was cleaned between samples <br /> by washing and rinsing in a hot water bath. <br /> The soil samples were immediately sealed in the liners using <br /> teflon tape and plastic caps, labeled, and immediately placed on <br /> ice for transport to our laboratory under chain-of-custody <br /> documentation. <br /> Soil cuttings derived from the boring were contained and are <br /> currently stored on-site. The disposal of the soils remains <br /> the responsibility of the property owner. The borings were <br /> backfilled with a cement slurry under the direct observation of <br /> San Joaquin County Department Of Environmental Health personnel. <br /> The soil samples were submitted to our laboratory for analytical <br /> testing for Total Petroleum Hydrocarbons (gasoline and diesel) , <br /> Total Volatile Hydrocarbons, as well as Volatiles and Extractable <br /> Organics in the gravel-surfaced storage area. The results of the <br /> laboratory testing, along with the chain-of-custody forms, are <br /> presented as Figures 10 through 25. The chemical test results do <br /> not indicate the presence of Petroleum Hydrocarbons and Volatiles <br /> and Extractable Organics in the site soil samples tested. <br /> The soils at the site, as encountered in our borings, consisted <br /> of alluvial sand, silt, and silty sand with thin interbedded <br /> lenses of gravelly sand, and clayey silt. Groundwater was not <br /> encountered during drilling. <br /> Based on information obtained from the subsurface investigation <br /> performed at the Kearney-KPF facility ( located immediately north- <br /> northwest of the project site) , shallow groundwater exists in the <br /> vicinity of the project site at depths ranging from 35 to 49 feet <br /> below ground surface. <br /> SURROUNDING LAND USE <br /> The surrounding land is characterized as commercial and <br /> industrial although some residential properties are located to <br /> the northwest and southeast ( see Figure 26) . The adjacent <br /> properties consist of storage-distribution facilities, industrial <br /> and manufacturing complexes, and vacant land. The properties <br /> immediately to the east and west of the project site consist of <br /> undeveloped land. <br /> _ 4 - BSI <br />