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a <br /> Del MonteQods— Research Center <br /> 205 North Wiget Lane (94598-2458) <br /> P.O. Box 9004 <br /> � Walnut Creek, CA 94598-0904 <br /> Telephone: (510) 944-7300 <br /> FAX: (510) 945-7453 <br /> i <br /> February 3, 1998 Hand Delivered <br /> Ronald Rowe <br /> Site Mitigation Unit <br /> Public Health Services <br /> San Joaquin County 304 E. Weber Ave., Third Floor <br /> Stockton, CA 95201-0388 <br /> Dear Mr. Rowe: <br /> Subject: Cross-sectional Analysis -Data SummaryNisualization,Disco Site <br /> Attached is the data summary and visualization analysis for the Del Monte Disco Site in <br /> Stockton, California. This submittal consists of tabular summaries of data,hydrogeologic <br /> cross-sections, and plan view plots of intrinsic bioremediation data. <br /> i <br /> Tabular Data Summaries <br /> t Tabular data summaries were prepared and present the following information: <br /> Table 1 —Drilling and Well Installation Summary. This table provides a chronological <br /> summary of the subsurface investigations conducted to date,depths of boreholes, and <br /> well construction information. <br /> Table 2— Soil Gas Sample Analytical Results. This table summarizes the soil gas <br /> analytical results for the borings conducted in May 1991. <br /> Table 3 - Historical Soil Sample Analytical Results. This table summarizes the soil <br /> sample analytical results for total petroleum hydrocarbons as gasoline(TPHG); benzene, <br /> toluene, ethylbenzene, and total xylenes (BTEX); and total lead collected during UST <br /> removal,piping removal, and 1991 drilling activities. <br /> Table 4—Groundwater Monitoring Results. This table summarizes the historical <br /> groundwater analytical data for TPHG,BTEX,methyl tert-butylether(MTBE), and total <br /> lead. Data summarizing the groundwater elevations and screen intervals are also <br /> presented. This provides data on when monitoring Well screens became submerged. <br />