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Quarterly Monitoring Report <br /> Fourth Quarter 1999 <br /> Former American Forest Products Stockton Facility <br />' Stockton, California <br /> 1.0 INTRODUCTION <br /> This report was prepared by Dames & Moore on behalf of the former American Forest <br /> Products Company (AFPC), and presents the results of monitoring activities conducted <br /> during the fourth quarter of 1999 at the former AFPC facility (Site) located at 2801 West <br /> Lane, Stockton, California (Figure 1) This work was conducted in response to a letter from <br /> the San Joaquin County Public Health Service-Environmental Health Division (PHS/EHD) <br /> dated August 3, 1998, and was conducted in accordance with the PHS/EHD-approved work <br /> Plan dated September 14, 1998 The report discusses activities conducted at the Site since <br /> August 1998, and provides a brief assessment of TPH-D groundwater results collected since <br /> 1987 <br /> 1.1 Background <br /> The Site is located at a former wood processing facility Following the detection of <br /> hydrocarbon-impacted soils in 1986, two USTs were excavated and removed on May 11, <br /> 1988 One UST was a 10,000-gallon diesel tank, and the other UST was a 500-gallon <br /> waste oil tank A summary of site investigation activities conducted since 1986 was <br /> presented in the Third Quarter 1999 Quarterly Monitoring Report <br /> Because of rising groundwater levels, two additional groundwater monitoring wells were <br /> installed in December 1998, as required in the PHS/EHD letter dated August 3, 1998 The <br /> quarterly monitoring program was reinitiated at the Site following the installation of these <br /> two wells In response to a verbal request from the PHS/EHD, collection of samples from <br /> 1 all seven wells began in September 1999 <br /> 1.2 Purpose <br /> The purpose of this report is to document monitoring activities conducted at the Site during <br />' the fourth quarter of 1999 The primary objectives of the monitoring are to assess changes <br /> in groundwater levels and concentrations of TPH-D in groundwater at the Site <br /> DAMES&MOORE 111DM_SACIWOL_21JOB1AFPIREPORTIQ4-1999 DOC <br />