Wastewater

Wastewater management studies have been performed to determine collection alternatives, budgeting, and to identify service limits for several municipalities. CJMac have assisted with Public meeting and funding request to all levels of Government.

Design of wastewater collection and treatment facilities throughout Nova Scotia, including conventional sewers, pump/lift stations, river crossings, and pressurized small diameter conveyance systems. New wastewater treatment plants have been recently designed in Pictou, Havre Boucher, Evanston, Milford, and Aldershot; Renovation for CFB Gagetown WWTP; and provision of an ongoing optimization service at seven Canadian Army bases.

Hundreds of on-site sewage disposal systems have been designed, inspected and approved for residential and commercial applications. Systems constructed include conventional gravity contour, pressurized, and sand filters.

Project: Coalburn Wastewater

Coalburn Wastewater Extension Project
Municipality of the County of Pictou, Nova Scotia

C.J. MacLellan with ABL Environmental Consultants Inc. provided for design and contract administration engineering services for the construction of an extension to the existing collection system and upgrades to the existing sewage treatment plant.

CJMac acted as prime consultant responsible for structural, civil, and mechanical design. ABL provided the process design for the treatment plant and Nova Dynamics provided electrical and controls design. The project commenced in the fall of 2009 and construction commenced in the spring of 2010. Commissioning is anticipated by March 2011.

The design program was undertaken with a very aggressive schedule to meet funding requirements. The capacity of the existing treatment plant is to be expanded by 40% to 80,000 Igpd. The upgrades include additional aeration, a second RBC unit, a tertiary filter and improvements to the building envelope. The collection system extension was intended to service an additional 125 households with capacity for expansion.

The extension consists of: two new pumping stations and upgrade of an existing pumping station, 4,025 m of conventional gravity sewer, 2,125 m of small diameter gravity sewer, 1,525 m of low pressure forcemain, and 2,875 m of forcemain.

The project construction costs were tendered at $3.96 million with design and contract administration fees at fees at $ 333,000.

Project: Pomquet SBR

Pomquet SBR and Collection System
Municipality of the County of Antigonish -2002/2003

In 2002 C.J. MacLellan & Associates tendered over 4.5 kilometres of small diameter collection sewer (150mm diameter) and forcemain (75mm diameter) to service the Village of Pomquet. The project included individual pump chambers at those properties that required a pressure flow condition and cleanout chambers at others that flow by gravity to the local sewer.

One large lift station on Taylors road pumps sewage up to the treatment plant confluence manhole, while another on Cove road receives gravity flow than forces sewage back along the gravity line up to the confluence manhole near the treatment plant. An SBR treatment plant designed by ABL Environmental consists of one EQ tank, two reactors and a digester cell with the necessary

components to discharge effluent to the Pomquet harbour via a 450 metre long 150 mm diameter outfall pipe ballasted on the harbour bottom.

The project considered a number of tenders simultaneously with work extending over a one year period at a cost of $1.5 million.

Overall the Municipality is very pleased with the treatment plant and its connecting infrastructure and has on many occasions provided tours of the facility and system for municipal operators, NSEL staff and other interested parties in this technology.

Project: WWTP Biosolids Removal

Project: Antigonish WWTP Biosolids Removal
Client: Town of Antigonish

The Antigonish Sewage Treatment Plant sludge (1996 & 2005) had the initial stage which involved removing sludges from a twenty year old lagoon system prior to rehabilitation with a new raised wall six cell lagoon and a continuous sand filter. The new STP, after six years of operation, had a sludge quantity/quality test program undertaken jointly by ABL Environmental Consultants and C.J. MacLellan & Associates which recommended disposal by dewatering and biosolids composting at the Guysborough landfill.

A tender in late 2004 resulted in dredging and pumping the sludge biosolids through pre-screens, flocculation tank, and twin centrifuges for dewatering, with 220 bone dry tonnes hauling for composting and stabilization. C.J. MacLellan & Associates Inc provided contract administration, inspection. and sampling/testing services to the Town of Antigonish.

Project: Lyons Brook

Lyons Brook Wastewater Collection Project
Municipality of the County of Pictou

Project Description: Lyons Brook Wastewater Collection Project – C.J. MacLellan & Associates completed the pre-servicing report for this area in the Municipality of the County of Pictou in 2005 to service over 375 homes in the Lyons Brook area between the rotary and Scotsburn. The report recommended the use of small diameter pipe technologies and the consideration for individual heat source positive displacement pump stations in concert with some gravity collectors. A series of pumping stations would convey the sewage effluent for treatment at the new Town of Pictou wastewater treatment plant.

The final design tendered in 2008 included five pumping stations, over 28 kilometres of gravity and small diameter pressure sewer. The $6.0 million project required in excess of 80 plan/profile drawings, the first phase tender was awarded in the summer of 2008 and construction activities have commenced.

In parallel the firm completed conveyance design for the Town of Pictou including three new pump stations as well as the structural, site civil, mechanical, & electrical design for the new wastewater treatment plant as sub-consultant with ABL Environmental Consultants .

Project: Havre Boucher

Havre Boucher Wastewater Collection and Treatment Project
Municipality of the County of Antigonish, Nova Scotia

C.J. MacLellan with ABL Environmental Consultants Inc. provided for design and contract administration engineering services for the construction of a replacement wastewater treatment plant in Havre Boucher and the extension of the existing collection system.

CJMac acted as prime consultant responsible for structural, civil, and mechanical design with electrical design completed by SNC Lavalin from Halifax. ABL provided the process design for the treatment plant and Nova Dynamics provided control and SCADA design. The project commenced in the spring of 2009, with construction commencing in the spring of 2010, and commissioning by the end of 2010. The new plant is accommodated on the existing site and utilizes the existing outfall. The existing plant has remained in operation throughout construction. The facility incorporates gravity flow through SBR tanks to digesters with UV disinfection and outfall discharge to Havre Boucher Harbour. The plant is designed to accommodate existing development flows as well as future development to the year 2025. Its maximum capacity is 300,000 gpd. The collection system extension consisted of 1640 m of conventional gravity pipe, 1000 m of forcemain, and a sewage pumping station.

The project construction costs was tendered at $2.92 million with design and contract administration fees at fees at $ 390,000

Project: South River Industrial Park

Lower South River Industrial Park
Antigonish County – Nova Scotia

Over the past 25 years C.J. MacLellan has been providing engineering services to business owners for the development of sites within the Lower South River Industrial park.

This has included site grading, earthworks, site services, parking lot designs and access and complete building design packages.

Originally CJMac completed the overall site planning for the 25 lot industrial park subdivision including detailed design and implementation of the road network, extensive

earthworks and municipal services including sanitary and potable water services.

CJMac has recently completed a 175 metre road extension within the subdivision to make available three new lots for the Municipal run subdivision. The main entrance is paved with side roads currently in gravel finished conditions. Typical lots incorporate side and rear yard vegetative buffers with access from the road system. Buildings are of industrial use including a steel works facility, a boat building complex and a concrete plant. The subdivision is approximately 80% built out.