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1 <br /> 1.0 INTRODUCTION/HISTORY <br /> This report is being submitted in response to a request by the San Joaquin County Public Health <br /> Services, Environmental Health Division (PHS/EHD), to further investigate documented soil and <br /> groundwater contamination at the Hendrix & Son Trucking, Inc property (the site) located at <br /> ' 3730 Munford Avenue, Stockton, California The site location is shown on Figure 1 <br /> 1 One underground regular gasoline fuel tank was located along the western portion of the subject <br /> ' property During a routine systems test in early 1986 it was determined that gasoline fuel had <br /> leaked from a joint in the product piping adjacent to the tank Itis the understanding of RESNA <br /> ' Industries, Inc (RESNA) that the use of the tank was discontinued and the tank has since been <br /> removed The former tank location is shown on Figure 2 <br /> ' On April 21 and 22, 1986, J H Kleinfelder & Associates (Kleinfelder) advanced one soil boring <br /> to a total depth of 75 feet below grade, adjacent to the former tank pit, for the purpose of <br /> installing a groundwater monitoring well (MW1) <br /> Laboratory results for soil and groundwater samples collected from boring/well MW 1 indicated <br /> ' soil and groundwater beneath the site has been impacted by petroleum hydrocarbon constituents <br /> Analytical results for soil and groundwater are summarized in Tables 1 and 2, respectively <br /> 1 <br /> The initial investigation is discussed in detail in Kleinfelder's June 20, 1986 report titled Soil <br /> 1 and Groundwater Investigation <br /> ' In correspondence dated February 15, 1993, the PHSIEHD requested the sampling of well <br /> MW 1 In addition, the PHS/EHD has requested additional monitoring wells to further <br /> ' characterize subsurface conditions at the site <br /> 1 On March 2, 1993, RESNA personnel visited the site in order to purge and sample groundwater <br /> from MW 1 However, the well was devoid of water, indicating the water table has dropped <br /> WP 0393 FNL 1 <br />