Common use of Field Exploration Clause in Contracts

Field Exploration. Site Access. The site access can be provided using a truck-mounted drilling rig along the major portion of alignment. Traffic control will be required. Due to presence of soft subgrade soils and potential access problems along a portion of the project alignment near FM 762 and at the proposed detention pond location, an ATV rig may have to be used to drill borings. Surveying. The client will establish and provide GET the boring coordinates and ground surface elevations. GET will mark the boring locations in the field so that the survey crew can locate them. Checking for Utilities. GET will call Texas 811-Call for the locations of utilities. GET will coordinate these activities. GET will not hire a contractor to conduct subsurface utility studies to find location of any and all utilities. This is not the scope of GET work. We recommend the scope of our work to include subsurface utility investigation at boring locations to assess those underground utilities are not hit during field exploration. Traffic Control. Traffic control will be required along the project alignment during our field exploration. The scope of our field work will require a lane closure during drilling and sampling and borehole grouting. Our traffic control will be subcontracted out. Drilling and Sampling. We will evaluate the soil stratigraphy and groundwater conditions for the proposed paving and storm sewer improvements by conducting fourteen (15) soil borings to a depth of 15-ft from existing grade. It should be noted that spacing between borings is about 500-ft. We will conduct two (2) soil borings near the proposed detention pond (optional) to a depth of 25-ft from existing grade. The Plan of Borings is shown on Plate 2. The borings schedule is as follows: 15 A truck-mounted drilling rig. An ATV rig may be needed, if wet and soft soils are encountered at the borings. Detention Pond (Optional) B-16 and B-17 25 A truck-mounted drilling rig. An ATV rig may be needed, if wet and soft soils are encountered. Note: Borings B-1 through B-5 were drilled previously by GET for tapers and roundabout additions to 10-ft below the existing grade at the project site. Hence, these borings will be augered to 10-ft and then drilled and sampled between 10-ft and 15-ft below the existing grade. Soil samples will be obtained continuously from the surface to the completion depth of borings. The cohesive soils will be sampled, using a Shelby Tube sampler. Standard Penetration Tests (SPT) will be performed in sands, if encountered. Shear strengths of the clays will be measured in the field with a hand penetrometer and correlations between this data and laboratory unconfined compression and Torvane tests used to supplement laboratory shear strength data.

Field Exploration. Site AccessAll the proposed borings are located along existing street pavement areas. Mechanical truck coring machines will perform coring in boring locations before soil drilling and sampling are performed. The site access can borings will be provided drilled using a truck-mounted drilling rig along the major portion of alignmentrig. Traffic control will be required. Due to presence of soft subgrade soils and potential access problems along a portion of the The project alignment near FM 762 is located on a 2-lane-traffic road. Thus, traffic control measures including \\ATL-SERVER\geo\Proposal\2024\GP24-0606 - 23116 ▇▇▇▇ ▇▇ Seg 2 - FBC\GP24-0606 - Pavement Proposal.doc signs, cones, and at the proposed detention pond location, an ATV rig may have to be used to drill borings. Surveying. The client will establish and provide GET the boring coordinates and ground surface elevations. GET will mark the boring locations in the field so that the survey crew can locate them. Checking for Utilities. GET will call Texas 811-Call for the locations of utilities. GET will coordinate these activities. GET will not hire a contractor to conduct subsurface utility studies to find location of any and all utilities. This is not the scope of GET work. We recommend the scope of our work to include subsurface utility investigation at boring locations to assess those underground utilities are not hit during field exploration. Traffic Control. Traffic control flagmen will be required along the project alignment during our field exploration. The scope of our field work will require a lane closure during pavement coring and actual soil drilling and sampling and borehole groutingsampling. Our traffic control will be subcontracted out. Drilling and Sampling. We will evaluate Based on the soil stratigraphy available project information, ATL proposes the following borings to investigate the subsurface soils and groundwater conditions for along the proposed paving and storm sewer improvements by conducting fourteen site location plan is presented in Figure 1 as shown in Table A below: Boring No. (15Piezometer) soil borings to a depth of 15-ft from existing grade. It should be noted that spacing between borings is about 500-ft. We will conduct two (2) soil borings near the proposed detention pond (optional) to a depth of 25-ft from existing grade. The Plan No of Borings is shown on Plate 2. The borings schedule is as follows: 15 A truck-mounted drilling rig. An ATV rig may be neededStreet / Location Depth, if wet and soft soils are encountered at the borings. Detention Pond (Optional) B-16 and B-17 25 A truck-mounted drilling rig. An ATV rig may be neededft Total, if wet and soft soils are encountered. Note: Borings B-1 through B-5 were drilled previously by GET for tapers and roundabout additions to 10-ft below the existing grade at the project site. Hence, these borings will be augered to 10-ft and then drilled and sampled between 10-ft and 15-ft below the existing grade. Soil samples will be obtained continuously from the surface to the completion termination depth of borings. The cohesive soils will be sampled, using a Shelby Tube sampler15 ft. Standard Penetration Tests (SPT) will be performed in sands, 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 unconfined compression and Torvane tests used to supplement laboratory shear strength datadata 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 until groundwater is encountered, or caving of soils occurs. Drilling will be suspended for 15 minutes to facilitate water level observation in the boring. After recording the water level, drilling will be resumed. The boreholes will be backfilled with soil cuttings and the pavement surface core will be patched back with lean concrete.