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EA ENGINEERING. <br /> SCIENCE, AND <br /> TECHNOLOGY. INC. <br /> James M. Kerr, Jr. , P.G. 3 December 1987 <br /> EXXON Company, U.S.A. Page 2 <br /> where: <br /> R = radius of influence (meters ) <br /> k = hydraulic conductivity (m/d ) , assume 0 . 86 as <br /> indicated in EA' s report <br /> H = aquifer thickness (M ) , assume 3 . 3 M the saturated <br /> of the penetration of MW6 <br /> h = depth of water in well during pumping, <br /> assume 0 . 9 M <br /> Q = pump discharge M3/d, assume 1 . 5 gpm = 8 M3/d <br /> r = well radius, assume 0 . 3 M ( radius of sand pack ) <br /> solving: <br /> Rz 9 . 2 M <br /> or <br /> 30 feet <br /> As illustrated in the attached drawing the proposed building is <br /> 54 feet across at its widest point, should it be found that MW6 <br /> and MW2 do not provide sufficient hydraulic control to capture <br /> the plume, future wells could be located adjacent to the proposed <br /> building, a distance of 60 feet apart, resulting in complete <br /> plume capture under the building. <br /> Based on previous experience I believe that, should ground-water <br /> treatment be required, very likely it would only be necessary to <br /> pump from MW6 . However, in the worst case it should not even be <br /> necessary to disturb the proposed building for remediation. <br /> In closing, I wish to re-emphasize that the potential actions <br /> outlined here are not currently proposed or recommended, but are <br /> only exemplary, to illustrate the possibility of providing <br /> ground-water clean-up which would be unhindered by the proposed <br /> construction. <br /> Should you have questions or require additional information <br /> please do not hesitate to call . <br /> Sincerely, <br /> .% <br /> Robert E. Hinchee, Ph.D. , P. E. <br /> REH:cam <br /> Enclosures <br />