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Description of Proposed Investigations 1. General SJAFCA is assisting the U.S Array Corps of Engineers (USACE) with the design and construction of the Lower San Joaquin River Project. The Project will need to access property to sample soil materials for the proposed improvements. In order to determine the extent of and to ultimately prepare the design for these improvements, SJAFCA and the USACE must evaluate soil conditions in the area. SJAFCA shall notify a property representative 48 hours in advance of its entry on the Property for these activities. 2. Property Access The project team and its engineering, survey and environmental consultants will require access to private and public parcels to complete studies needed as part of the planning and design process for the project. The nature of each study is described in more detail below. 3. Points of Contact A SJAFCA representative, Adam Riley or designee will work with the owner in this effort. He can be contacted directly at (530) 7774668, or by email at adam@larsenwurzel.com. 4. Geotechnical Explorations The Contractor shall performsubsurface explorations at or near the locations shown in the attached maps. Explorations shall include both soil borings and/or Cone Penetration Tests (CPT). Representative soil samples will be obtained from the borings at approximately five-foot depth intervals or more frequently. All samples will be taken off site for further examination and geotechnical laboratory testing for analysis. There will be up to five people on-site to complete the borings: a driller, up to two driller's helpers, a logger, and a County grout inspector. The boring will be performed using a tire - mounted drill rig. In addition, there will be a support truck for the drill rig, a pick-up truck for the logger, and a pick-up truck/car for the grout inspector. After each boring is completed, the driller will place soil cuttings and drilling fluid in 55 -gallon drums. The drums will be removed from the site on the day the boring is complete and disposed of at an appropriate disposal facility. The borings will be backfilled with neat cement grout in accordance with the County's well permit requirements. Boring performed in parking lots will be capped with asphalt to match the existing parking lot surface. All equipment, materials, and trash will be removed from the site and the area will be restored to its prior condition. Page 4 of 5