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C A M B R I A <br /> Groundwater drawdown in the extraction wells and adjacent wells will be measured using <br /> pressure transducers. Recovery rates in the extraction well will similarly be measured. Results <br /> from the pump test,groundwater sampling,and quarterly monitoring results will be used to <br /> determine the feasibility of groundwater extraction as a remedial approach for this site,either as <br /> short-term periodic events or as a full-time groundwater extraction system. <br /> Chemical Analyses: Soil samples from borings SB-19 and SB-20 will be analyzed for total lead <br /> by EPA Method 6010. Shallow soil samples collected from borings SB-26, SB-27, and SB-28 <br /> will be analyzed for TPHg, BTEX, oxygenates, and lead scavengers by EPA Method 8260. <br /> © Groundwater samples collected from the borings will be analyzed for fuel oxygenates and lead <br /> scavengers by EPA Method 8260. Groundwater samples from the newly installed wells and <br /> samples collected during the aquifer testing will be analyzed for TPHg, BTEX, seven <br /> oxygenates, and lead scavengers by EPA Method 8260. <br /> Offsite Source Investigation: Cambria will perform a records search for properties within 'h <br /> -mile radius of the site subject site to determine if there are other potential sources of 1,2-DCA. <br /> The research will include: a review of historical city directories at the Stockton Public Library (if <br /> appropriate), a review of historical aerial photographs of the surrounding area, a review Sanborn <br /> fire insurance maps for the area(if available) and, a review of government database information, <br /> prepared by Environmental Data Resources, Inc. The results of the records search will be <br /> reported with the results of the other investigation activities proposed in this work plan. <br /> Report Preparation: Within 60 days of the receipt of analytical results from the laboratory, <br /> Cambria will prepare a written report which will include documenting the activities presented in <br /> this work plan. <br /> SCHEDULE <br /> Cambria is prepared to initiate this work upon written approval of this work plan by EHD. <br /> Access agreements and encroachment permits will be sought once EHD has agreed to the <br /> location of the proposed borings. The actual date of field work is contingent on driller <br /> availability. <br /> 0797 7 <br />