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Mr. Berhan Keffelew <br />February 14, 1990 <br />Page 3 <br />Removal of Concrete Drop Box (4' Lona x 4' Wide x 3' Deep <br />3' X 16' = 48 SF x 2.62/sf <br />3.5' X 3.5' = 12.25 sf X 2 <br />1.11 c.y. x 4.32/c.y = <br />_ $126.00 (walls) <br />62/sf = 32.00 (floor) <br />5.00 (removal) <br />Total Cost of Removal: $163.00 <br />Total Additional Bond Requirement: $1,000.00 <br />In addition to the above modification, WFC proposed to modify <br />the drainage plan at the inlet to Pond 006. Currently, process <br />water from the Plant and thickener is conveyed to Pond 006 via <br />ditch D-21 and culvert C-18. With the installation of the above <br />described drop box and two six inch conveyance lines to Pond 006, <br />the culvert and ditch will no longer be required. Through the <br />elimination of culvert C-18, the surface water currently routed <br />through culvert C-22 could be ditched directly from ditch D-32 into <br />D-22 and on to Pond 007. <br />This revision is being submitted without a designation of <br />type. WFC is requesting that the Division determine the required <br />processing of this revision and provide WFC the requirements of its <br />decision as soon as possible. Regardless of the Division's <br />decision, an expedited processing and approval would be greatly <br />appreciated. <br />If there <br />modifications <br />please let me <br />are any questions regarding the above described <br />or should you require any additional information, <br />know. <br />Sincerely, <br />Gre E. one <br />Enviro ntal Coordinator <br />GEJ:ddm <br />enclosure <br />