Open sumps and ditches  II.    Well point systems  III.   Deep well drainage

You've been tasked with siting a new well in a confined aquifer that already has several operating wells. Drilling logs indicate that the aquifer is primarily sand and gravel with an average thickness of approximately 200 ft. You have specific capacity data from several drilling logs in the area (table 1), as well as data from a 48-hour single well pump test that was previously performed at well AG-1 several years ago (table 2). At the end of the single well test, simultaneous drawdown measurements were taken in several monitoring wells surrounding the pumping well (table 3). Estimate the transmissivity and storativity of the aquifer, along with a realistic range of uncertainty around those numbers. Table 1: Specific capacity data for nearby wells WELL BOREHOLE PUMPING STABILIZED DIAMETER DRAWDOWN 24 inches 16 inches 8 inches MW-1 AG-1 HH-1 Table 2: Single-well pump test on AG-1 at 500 gpm Time (min) Drawdown (ft) 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 120 180 240 300 360 540 720 1440…

A contract for an office building includes the provision of a storage tank. Drawing No Q₁ shows the plan and Section of the proposed storage Tank. Take off quantities for the following work Topsoil excauation b) Basement excavation Filling to basement excauation and replacement of topsoil around the structure Specifications 1 lapsoil to be excavated over the area of the structure for a width of 4m all around same and deposited 15m away for re use 2 Top soil to be excavated to a depth of 150mm 3 Excavate for basement including filling around the structure 4 and remove surplus soil from site Filling is to be of selected excavated material 5) Filling around the structure with topsoil 150mm depth NB use CES MM4

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What is the main difference in the procedure required for obtaining a sample of groundwater from below the groundwater table and from above the water table in a monitoring well?

Indicate the general advantages and disadvantages associated with hydraulic fill placement methods.

Match the excavator to the job: 1. Excavation for a 1” water line to your home. Length of trench= 50 feet, depth of trench 5 feet 2. Excavating the vertical face of a gravel pit from a location in the bottom of the pit 3. Excavating with a long reach in a pond filled with water removing gravel from bottom of pond. 4. Excavating in a deep vertical pit for a pump station foundation pit walls have steel sheet piling to protect from cave-ins.   A. Clamshell bucket on crane B. Dragline bucket on crane C. Hydraulic excavator D. Hydraulic shovel