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S <br /> F <br /> Yt-1 <br /> PROBLEM ASSESSMENT REPORT <br /> Moore Petroteun, !nc. <br /> 14800 W. frontage Road, Manteca, CA <br /> NGA Project No. 10-90.479 <br /> Page 16 <br /> i Flow to wells is horizontal and laminar. <br /> e Well diameter is infinitesimal so that storage within <br /> the well can be neglected. <br /> r., <br /> • Water removed from storage is discharged <br /> instantaneously with decline in head. <br /> While all of the above assumptions are rarely satisfied in nature, <br /> use of the Theis equation should provide reasonable approximations <br /> to declines in water levels produced by ground-water pumping or <br /> injection at the site. <br /> Two scenarios were modeled using DREAM. scenario 1 consists of <br /> Pumping monitoring wells MW-3 and MW-4 at rates of 2.5 and 1 gallon <br /> per minute (gpm) respectively. Scenario 2 consists .c. pumping <br /> wells MW-3 and MW-4 at rates of 2.5 and 0.75 gpm respectively, and <br /> installing an additional well (MW-9) between MW-3 and MW-4 and <br /> Pumping MW-9 at a rate of 0.75 <br /> gpm. <br /> Input parameters to DREAM utilized for modeling both scenarios are <br /> given in Table 6. <br /> TABLE 6 <br /> DREAM Input Parameters <br /> Scenario 1 Scenario 2 <br /> Pumping well MW-3, MW-4 MW-31 MW-4, MW-9 <br /> Pumping Rate <br /> 2.5 and 1 gpm 2.5, 0.75, 0.75 <br /> Aquifer 480^ Transmissivity <br /> gallons/day/foot 480 gpd/foot <br /> Natural Ground-Water .0048 foot/foot <br /> Gradient .0048 foot/foot <br /> Aquifer Thickness 30 feet 30 feet <br /> Aquifer Porosity 0.25 0.25 <br />