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GE GENESIS ENGINEERING& REDEVELOPMENT River is located approximately 1.75 miles southeast of the Site and flows in a southwesterly direction. The Site is located near the center of the Central Valley Geomorphic Province, an asymmetric synclinal trough characterized by extremely thick alluvial deposits on the western side of the axis. Surficial soils are the result of continental alluvial deposition in the flood plains of the San Joaquin and Stanislaus Rivers, and because of the structural down- warping, the overall alluvial section is up to 25,000 feet in the vicinity. The valley extends for 400 miles with a northwesterly trend and is about 50 miles wide at the latitude of Ripon. The near-surface soil profile is characterized by unconsolidated silty and clayey soils with irregular lenses of sand and gravel,typical of overbank fluvial deposition occurring during the Holocene Epoch. 2.0 SITE CHARACTERIZATION SCOPE OF WORK The Work Plan is comprised of the following tasks: Task 1 —Pre-Field Activities Task 2—Vertical and Lateral Nitrate Profile Task 3 —Shallow Water Bearing Unit Aquifer Test Well Task 4—Aquifer Test Task 5—Isotope Analyses Task 6—Data Analysis and Reporting The Work Plan incorporates the following documents,which are included as Appendices: 1. Sampling and Analysis Plan ("SAP")—Appendix A 2. Quality Assurance Project Plan ("QAPP")—Appendix B 3. Health and Safety Plan ("HASP")—Appendix C 4. Aquifer Test Procedures—Appendix D 2.1 Task 1 —Pre-field activities Pre-field activities will include: 1. Obtaining access agreements from property owners for the proposed exploratory boring locations and obtain encroachment permits from the City of Ripon, as needed—the exact locations of the proposed borings may be adjusted based on field constraints,permitting issues, access agreements, utility locations, and subsurface obstructions; Ripon Farn Services 2 of 7 Site Characterization Work Plan—Phase II July 2009