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I <br /> n Es <br /> www.ae2s.com <br /> 015 Field Order No.4-Door $101922.45 Y Pending <br /> Hardware Changes <br /> 016 Door Hardware Changes $561724.85 Y Pending <br /> TBD 010 Filter Slab Modifications TBD Y Expected <br /> Note:Any extension delays will be approved as a separate Change Order and will not be included in this Construction <br /> Contingency Expense. <br /> Proposal No. 010(RFP 007): Backwash Supply Pipino,: <br /> The initial backwash supply piping design showed process piping conflicting with a steel support beam. To <br /> avoid this conflict requires moving the piping and tee to the east 2 feet 6 inches and installing a 16-inch <br /> flange 90 bend. The requested changes also impact the originally drawn piping lengths and configurations, <br /> but this will not impact the overall costs for those modifications. <br /> Proposal No. 012: Accordion Folding Security Door: <br /> To meet egress out of the building, the fire rated accordion door into the admin area is required to open <br /> enough to allow for access through the main double door between the pipe gallery and admin area. The <br /> original design included one motor that would control both sides of the bi-parting system. This means that <br /> since these are driven by one motor, when activated, both sides of the accordion door retract at the same <br /> distance. This design worked as intended when the main door between the admin area and the pipe gallery <br /> was centered between the filter bays. However, once the intermediate level to the pipe gallery was added, <br /> the door had to be shifted for the landings and stairs to line up. W.L Hall Co. (door supplier) proposes to <br /> switch to a dual motor system, so that each bi-parting accordion door can be independently driven to allow <br /> for unequal opening around the main access door. See below for both scenarios. <br /> �..� ADMIN GALLERY ADMIN GALLERY <br /> '4 102 102 <br /> 8'-011 � I I O"-('<11 <br /> C7 �f <br /> LNDG. LNDG. <br /> CNJ <br /> '4 __ <br /> f fff#f fff#f f fff#f f # Oct_j-III f f fff#f #i f f■ f i f fff#f #ffffl f fLD <br /> f ffffl f V'_(}ilf ! f fff�fn <br /> # <br /> }}JJ - !i 0 I�VfI <br /> 0" DN UP UP <br /> 01 <br /> -A -F- <br /> o(D <br /> CELL 6 F LL 6 Al F <br /> VE E I <br /> SINGLE MOTOR ;F DUAL MOTOR <br /> 8'-10" 3'_0", 3'-0" 1b'-10"1 L i 8'-10" 3'-0" 3'-0" 10-- iu <br /> Proposal No. 013 (RFP 009): Backwash Tank Overflow: <br /> After reviewing the submittal for overflow weir boxes in each of the tanks and filters, it was determined <br /> that the backwash tank overflow would hydraulically benefit from extending the weirbox and lowering the <br /> invert of the overflow pipe. It was also requested that Magney switch from mechanical joint by flanged <br /> wall sleeves to plain end by flanged wall sleeves for all overflow pipes to better the hydraulics, however, <br /> Magney has already ordered the wall sleeves and would require a restocking fee to replace. For that reason, <br /> this proposal only includes the required modifications to the weir box in the backwash tank. <br /> Advanced Engineering and Environmental Services, Inc. <br /> 6901 East Fish Lake Road,Suite 184 • water Tower Place Business Center • Maple Grove, MN 55369 • 763-463-5036 <br />