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h7dian River County Page 2 <br /> Schumann Drive and Barber Street Intersection Improvements Project No. PSL- 08-2754 (BG 11 . 1) <br /> • The existing culvert for the canal under Barber Street just west of the intersection will be <br /> extended and a new headwall constructed . <br /> • Mast arms will be installed for signalization at the intersection . <br /> SCOPE OF STUDY <br /> Our geotechnical study will be conducted to characterize the subsoil and groundwater conditions <br /> along the roadway alignment, and at pond , culvert and mast arm locations . Our geotechnical <br /> work for this project will consist of the following components : <br /> Document Review <br /> 1 . Review of soil maps for native shallow soils types within the project alignment . <br /> Field Exploration <br /> Roadway Soil Survey <br /> I . Exploration of the shallow subsurface conditions along the roadway alignments with <br /> soil borings using a truck - mounted drilling rig or hand - turtued augering equipment . <br /> We will perform 646ot deep auger borings at about 25046ot centers along the <br /> roadway following an alternating roadside pattern . A total of sixteen ( 16) auger <br /> borings are budgeted . <br /> 2 . Groundwater levels will be measured in each of the boreholes upon their completion , <br /> and again after an approximate 24 -hour period to allow the water table time to <br /> stabilize , when possible . Additionally, we plan to install four (4) 646ot deep <br /> temporary piezometers and measure the groundwater levels once a week for a period <br /> of 2 weeks . <br /> 3 . Two soils samples will be collected for corrosion series testing and two bulk soil <br /> samples will be collected for Limerock Bearing Ratio testing . <br /> Pond Areas <br /> I . Explore the subsurface conditions at the pond sites with three (3 ) 20 - foot deep SPT <br /> borings . The pond SPT borings will be grout sealed after their completion . <br /> 2 . Conduct field permeability tests to assess the hydraulic conductivity of the subsoils <br /> within proposed pond areas . The tests will be conducted in 1046ot deep boreholes <br /> utilizing the SFWMD open hole, constant head test method . <br /> 3 . Install 10 -foot deep temporary piezometers in the pond areas and obtain groundwater <br /> readings in the piezometers once per week for 2 weeks . <br /> OUNKUBERGER <br />