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Abdelwahed Facility, UltraSite No. 13792 May 5, 2012 <br />Stockton, California_ Work Plan Well for DPE Well installation and Soil Gas Investigation <br />Installation of the DPE well, results and evaluation of groundwater analytical data, DPE <br />remedial action (if conducted) and the SGI shall be submitted in a single report. The report <br />will include tabulated soil and groundwater data, an estimate of residual hydrocarbon mass, <br />updated cross-sections and an estimate of the time required for groundwater to attain water <br />quality objectives. <br />If you have any questions, please contact Horizon at (916) 939-2170. <br />Sincerely, <br />HORIZON ENVIRONMENTAL INC. <br />Gary D. Barker <br />Senior Project Manager <br />// 1�5� <br />Rexford K. Smith, P.G. No. 5307 <br />Project Manager <br />Enclosures <br />Figure 1: <br />Figure 2: <br />Figure 3: <br />Site Location Map <br />Site Map / Groundwater Elevation Contour Map <br />TPHg / Benzene / DCA Concentrations in Groundwater <br />Figure 4: Proposed Monitoring Well Location <br />Figure 5: Proposed Soil Gas Sample Locations <br />Horizon Environmental Inc. Field Methods and Procedures <br />Typical Well Construction Diagram <br />cc: Mr. Roger Levin, Ultramar, Inc. <br />Sayed and Zakia Abdetwahed <br />Mr. James L.L. Barton, Regional Water Quality Control Board <br />1792 DPE Well WP <br />Project No. 1792.26 8 HORIZON ENVIRONMENTAL INC. <br />