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Quarterly Report - First Quarter 2004 <br /> PACIFIC PRIDE - SOUTH EL DORADO STREET <br /> ' 3147 South El Dorado Street, Stockton, California <br /> 1.0. INTRODUCTION <br /> I <br /> Advanced GeoEnvironmental, Inc (AGE) has prepared this quarterly report for 3147 South El <br /> ' Dorado Street (the site), Stockton, California The site setting is illustrated on Figure 1 Site <br /> structures and monitoring well locations are depicted on Figure 2 <br /> The obj ective ofthe work was to monitor dissolved petroleum hydrocarbon concentrations in ground i <br /> water and to characterize ground water flow direction and gradient on the site This report has been <br /> prepared in accordance with guidelines issued by the California Regional Water Quality Control <br /> ' Board - Central Valley Region (CRWQCB) for investigation of underground storage tank (UST) <br /> sites A site summary of previous investigations is included in this report in Appendix A <br /> ' Previous soil characteristics data obtained by a CPT investigation enabled AGE to define four <br /> informal hydrogeologic units(CPTSiteInvestigation-Third Quarter 2001,dated 25 October 2001) <br /> ' The informal hydrogeologic units were defined as First Water Zone(35-55 feet bsg),Second Water <br /> Zone(60-80 feet bsg), Third Water Zone(90-100 feet bsg) and Fourth Water Zone(I 10 to at least <br /> 125 feet bsg) <br /> • The following is a bnef summary of first quarter 2004 ground water monitoring activities performed <br /> at the site �i ti �OW 04 <br /> • 30 March 2004-Depth o water and total depth measurements were collected at wells MW-1 <br /> through MW-12, and ` <br /> ' • 31 March 2004 - Ground water monitoring and sampling was performed at wells MW-1 <br /> through MW-12, <br /> t � <br /> ' 2.0. PROCEDURES <br /> On 30 and 31 March 2004, ground water monitoring was performed at the site for ground water <br /> monitoring wells MW-1 through MW-12, as-built monitoring well construction details are <br /> summarized in Table 1 Ground water monitoring procedures for the site were outlined in the AGE- <br /> prepared Monitoring Well Installation Work Plan -September 1999, dated 01 September 1999,and <br /> approved by the San Joaquin County Environmental Health Department(SJCEHD)by letter dated <br /> 23 September 1999 <br /> 1 <br /> I ' Advanced GeoEnVLron mental,Inc <br />