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� l <br /> (f) INVESTIGATION SUMMARY REPORT <br /> AND GROUNDWATER MONITORING WORK PLAN <br /> FORMER COUNTY MOTOR POOL <br /> 130 NORTH HUNTER STREET <br /> Stockton, California <br /> ) <br /> 1.0 INTRODUCTION <br /> (p ' This report summarizes the results of soil and groundwater investigations conducted at the Former <br /> County Motor Pool Site at 130 North Hunter Street in Stockton, California (Figures 1 and 2), and <br /> presents a work plan for groundwater monitoring . The City of Stockton (City) purchased the Site from <br /> San Joaquin County in 2004, and has redeveloped it into a commercial building with a twomstory parking <br /> lot called the Coy Garage. Treadwell & Rollo was retained by the City to conduct soil and groundwater <br /> investigations, and to prepare this work plan . <br /> The objectives of the soil & groundwater investigations were to help delineate the source and extent of <br /> residual contamination around the former underground storage tank (UST) location area. The objective <br /> of the proposed groundwater monitoring is to help delineate the concentrations and extent of <br /> groundwater impacts and to help evaluate the need for additional monitoring and remedial measures. <br /> ® ! Treadwell & Rollo prepared a November 2004 soil and groundwater investigation work plan for the Site <br /> (Treadwell & Rollo 2004b), which was approved on 9 November 2004 by the San Joaquin County <br /> l Environmental Health Department (SJCEHD 2004) . Based on results of the field investigations two <br /> addendums to the Work Plan were submitted on 10 December 2004�(Treadwell & Rollo 2004c) and <br /> 20 January 2004 (Treadwell & Rollo, 2005a). ( These addendums were both approved by the SJCEHD <br /> (SJCEHD, 2005b). A well destruction work plan was submitted to the SJCEHD on 11 January 2005, and <br /> was approved on 14 January 2005 (SJCEHD, 2005a). <br /> This report and work plan presents the following : <br /> F <br /> " 1 . A summary of previous Site uses and soil and groundwater investigations conducted prior <br /> Qto 2004; <br /> kf 2. Details of the environmental work conducted by the City since 2004, including : <br /> i <br /> • Sampling and laboratory analytical methods used; <br /> Q � <br />