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go <br />s <br />4 Description: <br />Unsuitable soil excavation/replacement in chlorine contact basin <br />area. <br />Purpose: <br />Unsuitable soil removed and replaced to structurally stabilize the <br />basin. <br />Cost: <br />$14,612.74 <br />Time: <br />7.5 days (SC) <br />Description: <br />Credit for topsoil not used on project. <br />Purpose: <br />Topsoil from excavation efforts used in lieu of off-site purchase. <br />Cost: <br />($7,306.37) <br />Time: <br />None <br />6 Description: <br />Bubbler control panels with air compressors. <br />Purpose: <br />Air compressors added to control panels for bubbler level systems <br />in lieu of additional air piping. <br />Cost: <br />$4,266.74 <br />Time: <br />None <br />7 Description: <br />Submersible pump base modifications. <br />Purpose: <br />Existing pumps identified to be used in onsite lift station required <br />modification to facilitate rail -mounted seating in wet well. <br />Cost: <br />$3,025.51 <br />Time: <br />None <br />8 Description: <br />Rotary drum thickener elevated slab revision. <br />Purpose: <br />Elevated slab enlarged to facilitate access to rotary drum thickener <br />and control panel to meet electrical codes. <br />Cost: <br />$2,883.10 <br />Time: <br />2 days (SC) <br />rnnoz <br />