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GEO-PHASE <br /> ENVIRONMENTAL <br /> Work Plan <br /> Site Characterization II <br /> Former Karlson Trucking Facility <br /> 9909 East Woodward Avenue <br /> Manteca, California <br /> December 6, 1999 <br /> Project No. 191.2 <br /> 1.0 INTRODUCTION <br /> 1.1 Introduction <br /> The site is located southeast of the city of Manteca, CA (See Figure 1), at <br /> 9909 East Woodward Avenue formerly used as a commercial trucking facility. <br /> During the course of a Phase I Environmental Site Assessment, several <br /> environmental conditions were identified which were deemed to require <br /> further investigation by completing soil and/or groundwater sampling. These <br /> areas included: <br /> • A suspected former underground storage tank location between a pole <br /> barn and main repair building at the site. <br /> • A former retention pond which stored water sourced from a former truck <br /> wash. <br /> Geo-Phase Environmental Inc. subsequently installed a group of 7 Geo-Probe <br /> soil borings into groundwater to approximately 15 feet below grade. <br /> Groundwater was encountered at 11 feet below grade. These borings <br /> included the following: <br /> • Three near a possible underground storage tank location between the pole <br /> barn and main repair building <br /> • One adjacent to the outfall near a pit used to dispose of water from a truck <br /> washing rack. <br /> 2937 Veneman Avenue, Suite B240 Geo-Phase Environmental Inc. Phone: (209)569-0293 <br /> Modesto,Ca 95356 Fax: (209)569-0295 <br />