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i <br /> SOIL INVESTIGATION <br /> Idlewild Market <br /> 3049 Highway 12 <br /> Lodi, California <br /> September 26, 1994 <br /> I <br /> 1.0 INTRODUCTION <br /> This report describes the soil investigation conducted at the Idlewild Market located at 3049 <br /> Highway 12 in Lodi, California as shown in Figure 1, Appendix A This investigation was conducted <br />` to assess the lateral and vertical extent of soil contamination associated with former underground <br /> storage tanks (USTs) Iocated at Idlewild Market This report was prepared by Condor Earth <br /> Technologies, Inc, (Condor) at the request of Ivr Keith Tallia of Oil Equipment Service (OES) <br /> 2.0 SUE HISTORY <br /> OES removed one UST and closed two USTs in place at the site in May, 1993 In October, <br /> 1993, OES removed three USTs from the site The former USTs were located al two separate <br /> locations, Pit 1 and Pit 2, as shown in Figure 2, Appendix A Laboratory analyses of soil samples <br /> Ecollected beneath the former locations of tanks Tl and T3 located in Pit 1 at depths of 9 5 and 9 feet, <br /> respectively, indicated gasoline and gasoline constituents were present The soil sample collected <br /> beneath the former location of tank T2 at a depth of approximately 12 feet below the ground surface <br /> indicated no evidence of petroleum contamination at the reported laboratory detection limits <br /> Immediate) following the collection of soil samples beneath the former USTs located in Pit I, <br /> Y g P <br /> petroleum stained soil within Pit 1 was over-excavated At the conclusion of the over-excavation, <br /> field observations indicated a patch of grey, petroleum stained soil remained on the north sidewall <br /> I from a depth of approximately 6 feet to I 1 feet below the ground surface Petroleum stained soil <br /> along the north sidewall was not removed due to the likelihood of structural damage to the building <br /> canopy located immediately north of the over-excavation Laboratory analyses of the soil sample <br /> (145R-Pitl-N-10) collected from the north sidewall at a depth of 10 feet below the ground surface <br /> following over-excavation indicated from 3,200 to 65,000 µg/kg toluene, ethyl benzene and xylene and <br /> 1,400 mg/kg gasoline No evidence of petroleum contamination was detected at the reported <br /> laboratory detection limits in the soil samples collected from the bottom and the three remaining <br /> til/ CONDOR <br />