WASTEWATER PLANNING, DESIGN, AND
CONSTRUCTION MANAGEMENT
department of conservation anc recreation
The Metropolitan District Commission - Division
of Watershed Management (DWM), now the
Department of Conservation and Recreation
(DCR), selected Weston & Sampson. to prepare
a comprehensive wastewater facilities plan for
the communities of West Boy!ston and Hoiden.
The overall project objective was to provide a &
framework to protect and preserve the water ®
quality in the Wachusett Reservoir watershed. i
The facility plan recommendation called for
over 300,000 linear feet of gravity sewer, 70,000
linear feet of force main, 28 wastewater pumping
stations, and two satellite wastewater treatment facilities. The project would be
designed and constructed utilizing over 12 construction contracts over a period of
eight years.
Due to the urgency of providing immediate watershed protection in the Industrial
Area of West Boylston and the Pinecroft Area of West Boylston and Holden, the
DCR selected Weston & Sampson to initiate the design and construction of these
construction contracts in order to proceed in a “fast-track” time frame. These areas
posed immediate threats to public health and the environment due to the documented
failures of on-site wastwater disposal. The projects included over 65,000 linear feet
of gravity sewers and two wastewater pumping stations. The design effort for the
fast-track projects was completed in only 95 days.
As part of the design effort, we were required to develop a state-of-the-art
instrumentation and control program that would provide Supervisory Control and
Data Acquisition (SCADA) capabilities for the operation and maintenance of the
wastewater treatment facilities and pumping stations. These facilities would ultimately
be operated by the individual! towns once the construction was completed,
The design documents for the fast-track project included a 2.0 million gallons per
day (mgd) custom wastewater pumping station. This SCADA system specification
was developed for all future wastewater treatment facilities and pumping stations.
When completed the SCADA system will be utilized to operate and monitor 16
wastewater pumping stations in Holden and 12 wastewater pumping stations and
two wastewater treatment facilities in West Boylston.
The SCADA design is a PLC-based system that polls key operation signals at
the pump station and monitors alarm conditions. Land-based telephone lines are
utilized to carry any alarm conditions to a call back service center. This system is
nonproprietary and allows for changing the central station or future installation of a
continuously manned central station by the town.
The installed SCADA system also has PC-based monitoring and data acquisition
capabilities. This system includes a local and remote PC, which allows the town to
remotely access the pump station through a dial-up modem. The PC is linked to the
main instrumentation and control panel at the pump station using commercial brand
man-machine interface control software. This system provides visual and numerical
real-time operation information for the pumps and all major ancillary systems
(sewage grinders, flow metering, stand-by power, gas detection, odor control, etc.),
and generates operational and trending data reports.
westonandsampson.com
eB datasystem
implementation
a development of
instrumentation and
control program
to provide SCADA
capabilities
g ability to meet critical
schedules
wu DCR coordination and
project requirements
ge strict environmental/
watershed
protection permitting
requirements
a inter-municipal/inter-
agency coordination
« SRF and state funding
assistance
client contact
Robert Lowell
Environmental Section Chief
Boston, Massachusetts
617-626-1340
robert.lowell@state.ma.us
Weston (Es) Sarmnson
