Agenda - Council - 05/14/2024 - Laserfiche WebLink

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nEA5. www.ae2s.com 013 RFP 005 Jet Mixing System Pump $161834.33 y Approved— Modifications Construction Contingency Expense 3 014 RFP 009 Backwash Tank Overflow $11534.38 y Approved— Construction Contingency Expense 3 015 Field Order Field Order No.4-Door $101922.45 y Approved— 004 Hardware Changes Construction Contingency Expense 3 Door 016 Hardware Door Hardware Changes $561724.85 y Approved— Construction Contingency Expense 3 Meeting 017 RFP 010 Filter Slab Modifications $961634.23 y Pending— Construction Contingency Expense 4 018 Field Conduit Encasement $51389.13 y Approved— Directed Construction Contingency Expense 4 019 Field Order North Sump Pit $61764.43 y Pending— 012 Construction Contingency Expense 5 020 Field Order CB 1 Air Flow Sleeves $4,617.83 y Pending— 013 Construction Contingency Expense 5 021 RFP 013 Torpedo Sand Filter Layer $271979.43 N Pending— Construction Contingency Expense 5 Note:Any extension delays will be approved as a separate Change Order and will not be included in this Construction Contingency Expense. Proposal No. 019(Field Order No. 012): North Sump Pit: During construction and submittal review, it was determined that a drain pipe was required to be added from the sump in the Sump Pump Closet room to connect with the stubbed waste piping from Sanitary Manhole No. 3. Engineer provided additional direction on installation of 8" PVC just above water stop at elevation of 96' to drain to manhole 3. As well as PVC installation, a sloped concrete fill will be placed in sump pit to avoid pooling. Contractor price reflects material and labor. Proposal No. 020(Field Order No. 013): CB1 Air Flow Sleeves: To ensure adequate air flow between structural beams within the Clearwell and Backwash Tank, 3" diameter PVC sleeves will be installed approximately 4' apart in the CB 1 beams. This addition limits the possibility of a pressure buildup within the tanks. Contractor price reflects material and labor. Proposal No. 021 (RFP 013): Torpedo Sand Filter Layer: Recent information from various suppliers around the industry has suggested that when greensand is installed over support gravel, there is a high likelihood of greensand migration into the gravel layer. This typically results in a reduction in depth of the greensand layer by 1" to 3". The addition of a 3" layer of torpedo sand at the interface between the gravel and greensand layer has been recommended by suppliers. This layer helps create a barrier to prevent the greensand media from infiltrating the support gravel. This is not required, but highly recommended to assist in maintaining media depths for the life of the media. Contractor price reflects material and labor. Advanced Engineering and Environmental Services, Inc. 6901 East Fish Lake Road, Suite 184 • Water Tower Place Business Center • Maple Grove, MN 55369 • 763-463-5036