Town of Hempstead Department of Water, New Iron Filtration System at Well 3

Posted on June 30, 2015

Client: Town of Hempstead Department of Water, Lido-Point Lookout Water District
Location: Lido Beach, NY
Project Type: New Iron Filtration System at Well 3
D&B Principal in Charge: William D. Merklin, P.E.
D&B Project Manager: Philip R. Sachs, P.E.
Project Cost: $2,800,000

Project Description

2981-TOH-Lido-Well-3D&B provided engineering services for the design and construction of a new iron filtration system and associated facilities. The filtration equipment, piping, valves, electrical, controls and chemical feed equipment were retrofitted into the existing treatment facility. The antiquated diatomaceous earth style filtration system was demolished.

Because there was no municipal sanitary sewer system in the vicinity of the treatment facility, special attention was required during design to address the disposal of the filtration system backwash waste. D&B designed a backwash equalization and settling tank to allow the Town to consolidate the backwash waste and to recycle up to 80 percent of the liquid volume in the treatment process. Additionally, a sludge thickening system was installed to reduce the final volume of sludge that must be transported via truck off site. The existing backwash waste lagoon was refurbished for the disposal of the relatively clean backwash waste water.

2981-TOH-Lido-Well-3-2Chemical facilities included a sodium hypochlorite and lime slurry equipment. Improvements to the Town’s existing SCADA system were included to incorporate the facility and treatment equipment.

D&B prepared the preliminary design reports, contract drawings and contract specifications for this project. D&B provided construction management and inspection services during the construction. D&B assisted the Town in obtaining approvals from the Nassau County Department of Health (NCDH) and the New York State Department of Environmental Conservation (NYSDEC).

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