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' Hydro&eo Consultants 1 Well MW-5 was pumped at a constant pumping rate of approximately 1 5 to 1 6 gallons +i per minute for the entire length of the test (23 hours and 50 minutes) Water levels for MW-5 are included in Table 4 (Drawdown) and Table 5 (Recovery) and water levels for observation wells are included in Table 6 Field data sheets for the aquifers test are included in Appendix A 1 The drawdown and recovery data for MW-5 and the observation wells were plotted and analyzed using solutions developed by Cooper-Jacob (1946), straight-line method and ' distance-drawdown methods The assumptions for the Cooper-Jacob solutions were as follows ' • the aquifer has infinite areal extent • the aquifer is homogeneous, isotropic, and of uniform thickness ' • the aquifer potentiometric surface is initially horizontal • the pumping well is frilly penetrating • the aquifer is unconfined ' • the flow is steady a the water is released instantaneously from storage with decline in hydraulic head, ' • there is no delayed aquifer response • the flow is horizontal and uniform in a vertical section through the axis of the ' well • displacement is small relative to saturated thickness of the aquifer ' • the flow velocity is proportional to tangent of the hydraulic gradient • the diameter of the pumping well is small so that storage in the well can be neglected Storage effects are expected to be observed at the beginning of the pumping tests, for this reason, the analytical solutions were fitted to the latter portion of the graph, which represents the later time data when storage effects are not expected to be as influential ' The late time data were also used for the recovery data 4.2 Collection of Groundwater Samples Groundwater samples were collected at approximately 2 hours 6 hours 12 hours 18 p pp Y > hours, and at the completion of the 24-hour pumping test from well MW-5 The Thnfty Oil TOC 0171 Aquifer Test and RAP Rpt Page 5