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10 INTRODUCTION <br /> On behalf of the San Joaquin Catholic Cemetery, Ramage Environmental has prepared this <br /> Work Plan for Groundwater Extraction and Groundwater Monitoring Report, First Quarter 2003 <br /> for submittal to the San Joaquin County Environmental Health Division (EHD) and the Central <br /> ' Valley Regional Water Quality Control Board (RWQCB) On June 2, 2003, EHD verbally <br /> directed that a work plan be included in this quarterly report to address the concentrations of <br /> ' methyl tertiary butyl ether (MTBE) remaining in groundwater beneath the site <br /> 1 1 Site Description <br /> The subject property is an operating cemetery located on the northeast corner of Harding Way <br /> ' and Cemetery Lane in the city of Stockton (San Joaquin County), California (Figure 1) The <br /> project site is located on the east side of the mausoleum building (Figure 2) <br /> ' 12 Previous Work Summary <br /> On November 17, 1989, two underground gasoline storage tanks (UST) and associated <br /> pumping equipment were removed from the site Between August 1990 and April 1995, based <br /> lie <br /> on evidence of impacted soil and groundwater beneath the site, five groundwater monitoring <br /> wells, two soil vapor extraction wells and two soil vapor extraction well nests were installed <br /> ' Groundwater has been sampled at the site since August 1990 A dramatic rise in groundwater <br /> elevation since well installation in the early 1990s resulted in groundwater table levels above the <br /> screened interval of the original five groundwater monitoring wells The rise in groundwater <br /> elevation also resulted in static groundwater entering the deep soil vapor extraction wells <br /> On April 28, 1998, Ramage Environmental installed two additional groundwater monitoring wells <br /> (MW-6 and MW-7) to re-establish a groundwater table monitoring and sampling capability at the <br /> site <br /> On May 20, 1998, Ramage Environmental published a Problem Assessment Report and <br /> ' Corrective Action Plan for the site Soil vapor extraction and air sparging were recommended as <br /> the most efficient and practical remedial alternatives On September 8, 1998, the USTCF pre- <br /> approved the cost to construct and operate a soil vapor extraction and air sparging system at the <br /> ' site The San Joaquin Catholic Cemetery contracted with ENSR. Consultants (ENSR) to <br /> complete the pre-approved scope of work <br /> ' 3 <br />