Site work for a water / sewer project in Franklin, New Hampshire. Completed plans call for site work for a water / sewer project.

The work involves re-coating Primary Digester #1 and Secondary Digester #2 metal covers (interior and exterior), digester piping and appurtenances, and repairing and coating exposed concrete on the two digester tanks. Secondary Digester #2 will be available for re-coating by May 18, 2026 and must be completed by June 30, 2026. Primary Digester #1 will be available by May 17, 2027 and must be completed by June 30, 2027. The contents of the digesters will be dewatered, emptied, and cleaned under a separate contract prior to re-coating. Proposing firms are strongly suggested to arrange a site visit prior to finalizing their quotation. All proposals must be received at the designated address by the specified deadline and must include completed Exhibits A, B, and C, as well as at least three references for comparable work. Proposals must be submitted in sealed envelopes marked appropriately or may be emailed, as instructed. Inquiries regarding this RFP should be directed to the Chief Operator , Mark Corliss at 603-934-9926 mark.a.corliss@des.nh.gov or the Assistant Chief Operator , Sam Wood at 603-934-9925 samuel.n.wood@des.nh.gov at the treatment plant between the hours of 7 a.m.-3:15 p.m. , Monday through Friday . Surface preparation and painting of the interior and exterior metalwork of the cover, the exposed portion of the concrete tank, the gas piping, and appurtenances shall be re-coated on Secondary Digester #2 and Primary Digester #1. The floating digester metal cover is approximately sixty (60) feet in diameter with a very gentle sloping rise to the center gas collection dome. There is a metal skirt approximately ten (10) feet high that is continuous around the perimeter of the cover. The cylindrical gas collection dome which is 6.25 feet in diameter and approximately 4 feet high is in the center of the cover. The underside of the cover has a system of support trusses numbering twelve (12) that extend radially from the center to the outside edge of the cover and down along the skirt wall of the cover. Each truss is approximately twenty-seven (27) feet long by six (6) feet high and made of angle iron with an I-Beam running top to bottom on the skirt wall. There are approximately ten (10) flapper valves to be re-coated, each approximately eight (8) inches in diameter, evenly distributed around the inside of the concrete tank wall. Two (2) eight-inch sampling wells that extend approximately ten (10) feet down through the cover into the tank shall be re-coated. The four (4) manholes and lids which penetrate the cover are to be re-coated. There are six (6) cover guide wheel slots evenly spaced around the skirt of the tank wall running from the top of the cover and descending helically to the bottom of the skirt. There are other small appurtenances which are integral parts of the cover and are included in this scope of work to be re-coated. Cover may not be removed from tank for re-coating. The metal exterior of the anaerobic digester cover, gas collection dome, and the side-skirting on Secondary Digester #2 and Primary #1, plus, gas piping from the digester to the ground surface, one ladder, waste gas piping and vent piping the digester, and two waste gas torches shall be re-coated. The digester covers are 60 feet in diameter. The area of the metal side-skirting on the secondary digester to be painted is approximately 1394 square feet. There are several sampling access covers and manhole access covers on the floating cover, as well as other small appurtenances, which also require re-coating. The gas piping is 6 inches in diameter and made of malleable cast iron pipe with flanged fittings and slip joints with approximately 55 linear feet on the secondary digester cover. The steel ladder on the cover measures approximately 11 feet in height and 3.34 feet in width and have some supporting structure. The vent pipes are to be re-coated; five of which are four-inch pipes approximately five feet tall. The remaining vent pipes are one inch piping and approximately five feet tall. There are two eight-inch waste gas pipes rising thirteen feet above ground and each having a two-foot torch which are to be re-coated. The area of the exposed concrete tank to be painted on each Digester is estimated at 1898 square feet. The work includes the outside wall from the ground up to the ledge, the top of the ledge, and the interior area of the concrete to the top of the metal cover. The contractor shall use Sherwin-Williams products as described below and follow the Sherwin-Williams Product Proposal guidelines for preparation and application. No alternatives are acceptable. Exterior Finishes Metal Cover, Components and Gas Piping: Surface Preparation: SSPC SP WJ4 Water Jet Light Cleaning Notes: Clean with detergent and rinse. Remove all debris prior to painting. Spot Prep: SSPC-SP2/3 Hand/Power Tool Cleaning Notes: Remove all rust and loose coating areas. Spot Prime: Sherwin-Williams - B58W00610 - Macropoxy(R) 646 Fast Cure Epoxy Notes: 5.0-7.0 mils DFT - Spot prime all areas prepared to SSPC-SP 2/3. Primer: Sherwin-Williams - B58C00020 - Macropoxy(R) 5000 Notes: Apply @ 900 square feet per gallon Topcoat: Sherwin-Williams - B65WJ0351 - Hi-Solids Polyurethane 250 Semi-Gloss Notes: 3.0-5.0 mils DFT Interior Finishes Metal Cover and Components: Surface Preparation: SSPC-SP10 Near White Metal Blast Notes: Minimum 2 mil angular blast profile. Remove all debris prior to painting. Primer: Sherwin-Williams - B62B00525 - Sher-Glass FF Glass Flake Reinforced Epoxy Notes: 15.0-20.0 mils DFT Topcoat: Sherwin-Williams - B62B00525 - Sher-Glass FF Glass Flake Reinforced Epoxy Notes: 15.0-20.0 mils DFT Concrete - Atmospheric 2 Coats: CF11W0051 - Conflex XL Smooth High Build Acrylic Coating Notes: 100 - 125 Sq Ft / Gal Concrete - Immersion Cementitious Epoxy Repair (as needed): B58A00320 - Dura-Plate(R) 2300 Notes: Repairs up to 1/2" Depth Cementitious Repair (as needed): .01380492 - AW Cook MSM Notes: Repairs 1/4" - 2" Depth Epoxy Repair Compound (as needed): B58W00910 - Steel-Seem FT910 Epoxy Patching and Surfacing Compound Surface Preparation: B62W00710 - SSPC-SP13 Surface Preparation of Concrete Notes: CSP 3-5 Lining: B62W00710 - Dura-Plate(R) 6000 Notes: 100.0-125.0 mils DFT applied in one coat. Concrete Repair Contingency: The Contractor shall notify the WRBP of any metalwork or concrete areas requiring spot repairs prior to coating. Any concrete repairs shall be performed by the Contractor per the minimum specifications above after prior approval by the WRBP. Contractor Responsibilities The contractor shall provide all labor, materials, services, tools, equipment, transportation and facilities to complete the Scope of Work. It shall be the sole responsibility of the contractor to comply with all local, state and federal rules and regulations in the commission of the work. The contractor shall be responsible for the offsite disposal of all waste products in accordance with all local, state and federal rules and regulations governing such materials. All work shall be performed in a neat and workmanlike manner in conformance with best modern trade practices by competent, experienced workers. All materials used shall be applied in strict accordance with the manufacturer's instructions. Work shall be completed during normal treatment plant working hours, which are Monday - Friday, 7 a.m. to 3:15 p.m. The plant is closed on State Holidays. Since all four digesters are in operation throughout the summer and autumn months, and due to our solids loading at the treatment plant, Secondary Digester #2 will not be available for re-coating until May 18, 2026. The re-coating of the metalwork, piping and concrete must be completed before June 30, 2026. Primary Digester #1 will not be available for re-coating until May 17, 2027. The re-coating of the metalwork, piping and concrete must be completed before June 30, 2027. WRBP Responsibilities The WRBP staff shall ensure all gates and valves that feed the tanks are locked in the closed position and demonstrate this to the Contractor. The WRBP will perform any lock out/tag out necessary to perform the work. After the contractor completes the repair and coating of each tank, the WRBP staff will inspect the tank making sure that all metal and concrete have been sufficiently coated. Contractor shall affect any necessary corrections of their work at no additional cost. Safety The WRBP operates an active safety program, with a safety committee and designated Safety and Heath Coordinator. The Contractor is expected to adhere to all applicable federal, state, and local safety regulations, as well as the Winnipesaukee River Basin Program (WRBP) safety policies. Should the work require entry into a confined space (as per OSHA definition in 29 CFR Part 1910), the contractor will be expected to follow all safety procedures relating to these areas, including those that are provided by the WRBP safety program. The Contractors must, at minimum: o Possess a written confined space entry program and appropriately trained workers. o Supply and use appropriate safety equipment, air monitoring equipment, PPE and rescue equipment. o Complete and submit a Confined Space Entry Certification (see Exhibit A). o Follow WRBP's confined space and safety protocols (see Figure 7.1). Hot Work Permit (if necessary) Any activity involving open flames, sparks, or heat-producing tools (e.g., welding, cutting, grinding) requires a Hot Work Permit. If any of the work involves open flames or produces heat and/or sparks, the Contractor must: o Review and comply with NFPA 51B standards and NFPA Hot Work Fact Sheet (attached for reference). o Complete the WRBP Hot Work Permit (example attached) prior to starting any hot work. o Visibly post daily Hot Work Permit at work location and notify WRBP staff of proposed Hot Work. o Provide appropriate fire watch personnel, fire extinguishers and spark containment. o Ensure the work area is free of flammable materials or properly shielded. Incident Reporting o All incidents, accidents, near misses, or unsafe conditions must be reported to WRBP staff immediately. o A written incident report may be required to be submitted to the WRBP.