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ATC Associates Inc. <br /> Quality Assurance Qualit%, Control Plan <br /> . Revised november 2002 <br /> Water level data collected from the wells will be used to develop a groundwater contour map for <br /> the project site. Groundwater flow will be estimated to be perpendicular to equipotential lines <br /> drawn on the map. <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 Approximately 10 times the volume of water in the casing will be withdrawn if possible.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 /> Gal/linear feet <br /> . 2 2.067 0.17 <br /> 4 4.026 0.66 <br /> VOLUME OF OPEN BOREHOLE AND ANNULAR SPACE BETWEEN CASING AND HOLE <br /> Hole Diameter Volume/Linear Feet of Hole Nominal Volume/Unear Feet of <br /> (inches) Casing Annular Space' <br /> 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 bV 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 <br /> practically continue. The volume of water produced versus time will be recorded. <br /> w:\admin\shclls\qaqc-02.doc <br /> 9 <br />