Site work and renovation of a water / sewer project in Chelmsford, Massachusetts. Completed plans call for the renovation of a water / sewer project; and for site work for a water / sewer project.

Contractor Qualification DCAMM Certificate Required for DCAMM contracts over $150,000, Highway Division contracts over $50,000. The project involves constructing a new treatment process for the removal of PFAS at the Crooked Spring WTP. The treatment process will be housed in a separate masonry building and consist of six, pressurized 12-foot diameter vessels filled with granular activated carbon (GAC). The building will be approximately 132 by 57 feet with the main process floor depressed 4-feet below ground elevation. The new building will contain two-celled backwash supply tanks with vertical turbine pumps, an electrical room, and a mechanical room. The Work will also include various upgrades to the Crooked Spring WTP main building and the construction of a two-celled, concrete, 60' x 60' x 10' spent wash-water recycle tank with recycle pumps. Sub Bid Category Masonry, Miscellaneous & Ornamental Iron, Roofing & Flashing, Painting, Plumbing, HVAC, & Electrical. This project included prequalification for General Contractors and Filed Subbidders. Only prequalified General Contractors and Filed Subbiders can submit a bid. Filed Subbids and General Bids shall be delivered to above agency address no later than the deadline.