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Area D reportedly contained detectable concentrations of TPH-g,TPH-d, 1,1,1-TCA, and TCE. <br /> The soil beneath the concrete bunker area reportedly contained detectable concentrations of <br /> petroleum hydrocarbons, 1,1, I-TCA, 1,1-dichloroethene(l,l-DCE), 1,1-dichloroethane (1, 1- <br /> DCA),and TCE. <br /> During May 1993,WZI,Inc.,conducted a limited soil investigation beneath Areas A and D,and <br /> the concrete bunker area. A total of 20 soil samples were collected from three exploratory <br /> trenches and six soil borings drilled by hollow-stem auger(Figure 7).This work included drilling <br /> a second angle boring and sampling beneath the concrete bunker area.Three shallow trenches <br /> were excavated to a depth of about 7 feet bgs in Area A in the vicinity of boring A-2. Low-level <br /> concentrations of petroleum hydrocarbons were reportedly detected in soil samples from the <br /> trenches.Three additional soil borings were drilled in Area D. Soil samples from these borings <br /> contained no detectable hydrocarbons or VOCs.Two vertical soil borings and one angle boring <br /> were drilled in the vicinity of the concrete bunker. Soil samples from these borings contained <br /> detectable concentrations of 1,1, 1-TCA, 1, 1-DCE, 1,1-DCA,and TCE. <br /> 4.2 Passive Soil Gas Survey <br /> Passive soil gas surveys were conducted on and in the vicinity of LNC site by the RWQCB <br /> between 1989 and 1993 in five separate surveys. During 1993 and 1994,the DTSC conducted <br /> additional passive soil gas surveys in the greater City of Lodi area that include the LNC site area. <br /> Between 1989 and 1996,a total of 533 passive soil gas samples were collected throughout the <br /> City of Lodi of which approximately 119 passive soil gas samples were distributed throughout <br /> the northern portion of the city. Of these,approximately 17 passive soil gas samples were <br /> collected north of Turner Road in the vicinity of the former Italian Swiss Colony Winery and the <br /> City of Lodi Landfill(Figure 5). In addition,three passive soil gas samples were collected on <br /> the LNC property and an additional 24 passive soil gas samples were collected on adjoining <br /> properties(NERI, 1996; Henshaw,2001). <br /> M einW AHnreonmen1sKLN CW10152007.w pd 16 <br />