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ATC Associates Inc. <br /> Quality Assurance/Quality Control Plan <br /> Revised February 1995 <br /> 10.0 WELL DEVELOPMENT PROTOCOL <br /> Groundwater monitoring wells will be surged and developed prior to setting the surface seal. <br /> Approximately 10 times the volume of water in the casing will be withdrawn if possible. Casing <br /> volumes will be calculated in the following manner: <br /> VOLUME OF SCHEDULE 40 PVC PIPE <br /> Diameter(inches) I.D. (inches) Volume <br /> Gaillinear feet <br /> 2 2.067 0.17 <br /> 4 4.026 0.66 <br /> VOLUME OF OPEN BOREHOLE AND ANNULAR SPACE BETWEEN CASING AND <br /> HOLE <br /> Hole VolumelLirtear Feet of Hole Nominal Volume/Linear Feet of <br /> ftiameter Casing Annular Space' <br /> �lnches) Diameter <br /> (inches) <br /> Gallons Cubic Feet': Gallons Cubic Feet <br /> 7.25 2.14 0.29 2 1.91 0.26 <br /> 8.25 2.78 0.37 2 2.55 0.34 <br /> 10.25 4.29 0.57 2 4.06 0.54 <br /> 10.25 4.29 0.57 4 3.46 0.46 <br /> 12.25 6.13 0.82 4 5.30 0.71 <br /> ' Annular volumes will be multiplied by 30%to account for porosity of filter pack. <br /> If the aquifer is slow to recharge, development will continue until recharge is too slow to practically <br /> continue. The volume of water produced versus time will be recorded. <br /> All withdrawn groundwater will be stored on-site in 55-gallon waste drums unless permission is <br /> granted by the appropriate regulatory agency to discharge the water to the ground surface or sanitary <br /> W:\Ad min\Shells\QAQC-98.D0C <br /> 9 <br />