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INTRODUCTION <br /> At the request of Mr. Americk Singh, Construction Testing and Engineering, Inc. <br /> (CTE) has conducted a limited subsurface investigation at the Lodi Food and Liquor, <br /> located at 1225 West Lockford Street, Lodi, San Joaquin County, California (see <br /> Figure 1) . <br /> The purpose of this investigation was to obtain field data regarding possible <br /> petroleum hydrocarbon contamination in the soil surrounding the underground <br /> storage tanks and fuel dispensers onsite. Soil samples were collected and submitted <br /> to a California State certified laboratory for the following analyses: total petroleum <br /> hydrocarbons-gasoline (TPH-G); and benzene, toluene, ethylbenzene, and xylene <br /> (BTEX) . All documented field observations and laboratory data were further <br /> analyzed and have been summarized in this report. <br /> SITE DESCRIPTION <br /> The subject site is located on the northeast corner of West Lockford Street and Ham <br /> Lane in Lodi, San Joaquin County, California. The business operating onsite is a <br /> mini-mart convenience store and gasoline fuel sales. Currently three gasoline <br /> underground storage tanks (USTs) exist onsite in the southeast corner of the <br /> property. Four gasoline dispensers are located along the island to the west of the <br /> current building. Additionally, CTE reviewed a 1957 site plan of the property which <br /> depicts a second pump island to the south of the building. A site plan is included <br /> showing the layout of the property. <br /> FIELD INVESTIGATION <br /> Boring locations were selected by CTE based upon field observations and proximity <br /> to the USTs, dispensing units, and the former pump island. Underground Service <br /> Alert (USA) was notified prior to any field work in order to ensure the proposed <br /> borings would not encounter utility, water, or sewer lines. Additionally, <br /> groundwater maps were reviewed to determine the depth to the water table in the <br /> area. According to groundwater maps, groundwater is located approximately 45 feet <br /> below the surface in the vicinity of the site. Locations of the borings may be found <br /> in Figure 2. <br /> On June 15, 1994, CTE personnel were onsite to conduct the subsurface <br /> investigation. Three, six-inch diameter soil borings (B-1, B-2, and B-3) were <br /> advanced to depths of approximately 21 feet, using a hollow-stem auger B-61 drill <br /> rig. Soil samples were collected at 15 and 20 feet in each bore hole with a 2-inch <br /> interior diameter split spoon sampler containing 6-inch brass sleeves. <br />