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1 <br /> ' Quarterly Report - April 1999 <br /> PAIGE'S TOWING <br /> ' 1807 Douglas Road,Stockton, California <br /> ' 1.0. INTRODUCTION AND SCOPE OF WORK <br /> Advanced GeoEnvironmental, Inc. (AGE) has prepared this Quarterly Report for well installation <br /> ' and ground water monitoring and sampling activities .at 1807 Douglas Road (site); Stockton, <br /> California.The location of the site is illustrated in Figure 1; general features at the site are illustrated <br /> in Figure 2. <br /> 1 <br /> The scope of work of this investigation included installation of four ground water monitoring wells <br /> ' with the objective of assessing and monitoring the impact of petroleum hydrocarbons on ground <br /> water. This report is prepared in accordance with guidelines established by the San Joaquin County <br /> Public Health Services - Environmental Health Division (PHS-EHD) and by the Central Valley <br /> Regional Water Quality Control Board for investigation of underground storage tank (UST) sites. <br /> A summary of previous investigations at the site was included in Preliminary Site Investigation and <br /> Evaluation Report, dated 20 February 1996 and prepared by AGE. <br /> 2.0. PROCEDURES <br /> ' In April 1999, monitoring wells MW-1 through MW-4 were installed on-site; ground water <br /> ' monitoring and sampling was performed at each newly installed well location. Ground water <br /> monitoring procedures for the site were outlined in Work Plan Addendum -September 1998, dated <br /> 16 September 1998 and in Revision to Work Plan Addendum = September 1998, dated 16 March <br /> 1999, prepared by AGE and approved by the PHS-EHD by letter on 29 March 1999. <br /> ' 2.1. INSTALLATION OF GROUNDWATER MONITORING WELLS <br /> On 08 and 09 April 1999, four soil borings/monitoring wells(MW-1 through MW-4)were advanced <br /> ' on-site as part of site assessment activities related to the former USTs at the site. Soil borings MW-2 <br /> and MW-3 were advanced vertically-to depths of 30 feet below surface grade (bsg); MW-1 was <br /> advanced vertically to 35 feet bsg; MW-4 was advanced vertically to a depth of 321/2 feet bsg. Soil <br /> ' borings MW-1 through MW-4 were advanced utilizing a CME-75 high torque, truck-mounted drill <br /> rig equipped with 8-inch diameter hollow-stem augers. Soil cuttings were stockpiled on and covered <br /> by plastic sheeting at the site in an area lacking public access. The soil boring/monitoring well <br /> locations are depicted in Figure 2. <br /> Advanced GeoEnvironmental, Inc. <br /> 1 <br />