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Soil and Ground Water Investigation <br /> Banner Island <br /> Stockton, California <br /> 1.0 INTRODUCTION <br /> This report documents Harza's field investigation at Banner Island in the City of Stockton, <br /> California. Banner Island is located on West Lindsay Street at the southern terminus of North <br /> Monroe. The site location is shown on Figure 1, and a site plan is shown on Figure 2. The <br /> investigation was performed to evaluate the presence of lead and petroleum hydrocarbons in soil and <br /> ground water at the site. <br /> 2.0 SCOPE OF WORK <br /> The scope of work was detailed in Harza's Environmental Investigation Workplan, Banner Island <br /> dated September 14, 1995, and included the following: <br /> • Drilling and collecting soil samples at various depths from ten borings,with analysis <br /> of the samples for total extractable petroleum hydrocarbons(TEPH)and/or total lead. <br /> • Collecting ground water samples from the nine existing on-site wells,with analysis <br /> of the samples for TEPH,total petroleum hydrocarbons as gasoline(TPHg),benzene, <br /> toluene,ethylbenzene,and xylenes(BTEX),dissolved priority pollutant metals, and <br /> general water quality parameters. <br /> • Collecting a surface water sample from the Stockton Channel adjacent to the site <br /> with analysis of the sample for TEPH, TPHg/BTEX, dissolved priority pollutant <br /> metals, and general water quality parameters. <br /> 3.0 SOIL INVESTIGATION <br /> On October 4, 1995,Hada drilled ten soil borings on the Banner Island site and collected samples <br /> at various depths for chemical analysis. Soil sampling and analysis was performed to provide <br /> additional information on the extent of petroleum hydrocarbons on the east and west sides of the <br /> property, the vertical and lateral distribution of lead in the vicinity of previous boring B l and <br /> monitoring wells MW-6 and MW-7, and the extent of lead and petroleum hydrocarbons near <br /> previous boring B4. Sample locations are shown on Figure 2. <br /> L,067HREP.030 1 <br />