The propsed Project is to perform geotechnical sampling, including eight soil borings and 18 test pits (and/or hand auguring) with the option to perform an additional soil borings/test pits/hand auguring as necessary. Geotechnical sampling is to conduct exploratry surveys to determine the suitability and quantity of borrow material available for U.S. Army Corps of Engineers' TS_30_L levee Improvement Project.
The boring/test pit equipment and work would be spending approximately two weeks per site with exceptions for weather delays, such as rain. Soil borings and test pits may be performed at designated locations at 6700 E. Copperopolis Road, Stockton, CA using a rubber tire John Deere 710 backhoe (or equivalent) for the test pits and CME-55 truck mounted drill rig (or equivalent) for the soil borings. The approximate soil boring and test pit locations were field checked for sensitive resources to prevent impacting protected plant and animal species by United States Army Corps of Engineers Environmental Managers on October 29, 2020. In addition, an Environemtnal Science Assoicate biologist conducted a biological resource site visit on April 6, 2021.
Assuming workdays will consist of 8-hour days, soil explorations are anticipated to require approximately 8 days for completion. Additionally, it is anticipated that one boring and 2-3 test pits will be completed per day. Considering this rate of production, the soil boring equipment (CME-55 Truck mounted drill rig, water truck and support vehicle) will be at each soil boring location up to 8 hours at a time and the test pit equipment (rubber tire John Deere 710 backhoe) will be at each test pit location between 3 to 4 hours. Currently, explorations are anticipated to begin at the borrow site near the end of May or beginning of June 2021.
Upon the completion of work, all soil borings and test pits would be backfilled to match original topography. Additionally, the work areas would be cleared of all excess soil from sampling and materials used for sampling