Common use of Field Exploration Clause in Contracts

Field Exploration. Based on the available project information, ATL proposes the following borings to investigate the subsurface soils and groundwater conditions along the site boring locations and are presented in Figures 1 & 2. Site Borings Total No of Boring Boring Designation Depth (ft) Total Depth (ft) ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇ ▇-▇ & P-2 80 160 Paving 2 P-3 thru P-4 20 40 Piezometer 1 P-1 (PZ-1) 50* 50* Pecan Creek Road (Total Depth, ft.) ▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇ 2 C-1 & C-2 80 160 Paving 2 C-3 thru ▇- ▇▇ ▇▇ ▇▇▇▇▇▇▇▇▇▇ ▇ ▇-▇ (PZ-2) 50* 50* The proposed borings are located within existing pavement thus coring will be required. Soil samples will be obtained continuously to a depth of 20 feet, and at 5-ft intervals thereafter. Standard \\atl-server\GEO\Proposal\2019\CP19-1102 Pecan-CedarRD Bridges\Pecan & Cedar Creek\CP19-1102 Pecan & Cedar Creek Bridges.doc Penetration Tests (SPT) will be performed in sands, if encountered, and clays will be sampled by Shelby tube. Shear strengths of the clays will be measured in the field with a hand penetrometer and correlations between this data and laboratory shear strength data will be made during analysis. Depth to groundwater will be important for the design and construction of this project. For this reason, the borings will be drilled dry and the depth at which groundwater is encountered will be recorded. The boreholes will be left open for 24 hours, and 24-hour water level will be recorded, and the boreholes will be grouted after the completion of drilling and sampling. two (2) 50-ft deep piezometers will be installed to monitor the 24-hr, 7- and 30-day ground water level. The piezometers will be pulled and plugged after the 30-day water level reading. Consolidated- undrained Triaxial Test (ASTM D 4767) 3-stage with 3 samples set, and soil dispersiveness tests (double hydrometer Test, Crumb Tests) are required at channel cross section.