Surgical excavation - Strongco helps rehabilitate a brownfield

Strongco helps a customer clean up a brownfield.
Strongco Corporation
July 10, 2018
By Strongco Corporation
Remediation work requires surgical excavation with careful handling of the removed material.
Remediation work requires surgical excavation with careful handling of the removed material.
When equipment manufacturers started promoting the use of excavators and articulated haulers together as earthmoving teams, they found a firm believer in David McCrossan.

President of The Cannington Group, a family-owned contracting firm in the Greater Toronto Area, McCrossan says the combination of Volvo crawler excavators and articulated rock trucks sourced from Strongco is the only way to do it here.

“Here” is a 75-acre parcel of prime land on the shore of Lake Ontario in the resurgent Port Credit area of Mississauga, Ont. The long-time former home of a bulk oil storage facility, the property will eventually be developed as one of the region’s prime residential communities. As a specialist in soil remediation and other environmental applications, The Cannington Group is currently on site for 14 months in what McCrossan describes as “a surgical excavation” project.

“We’re excavating, stockpiling, segregating and hauling off soils that exceed the site criteria. In some areas, we are taking two feet of dirt off, in some areas, we are taking three, four, even 10 feet off. The depth is all over the place,” he says. “Scrapers just wouldn’t work here with the select areas we have to excavate and the varying corresponding depths.”

Says McCrossan: “This is not a bulk excavation job.”

Equipment research pays off
Having worked in various sectors and in varying company configurations over the years, The Cannington Group is today in the business of working equipment, not fixing equipment, explains McCrossan. That, he says, is what makes the relationship with Strongco and key account manager, Daniel Hili, so important to the success of the specialized contracting company.

“We do a lot of research on the equipment,” says McCrossan. “It’s my job in the company to a) get the work, and b) provide the guys with the right tools to get that work done. With the support of Daniel, Strongco, Volvo and Volvo Finance, I have done that. They have collectively stepped up and provided us some fantastic equipment and really, really reasonable rates. It’s a very good package.”

The Volvo excavators and articulated haulers have not only earned a collective thumbs-up from his operators for their ergonomics and ease of operation but also McCrossan’s own top grade for meeting their fuel efficiency and cost of operation claims.

Some pieces in The Cannington Group’s Volvo fleet were procured specifically for the Mississauga job “but we’ve also had long-term and multiple leases,” says McCrossan. “It’s a long-term relationship that we’re in with Strongco and it’s going to continue.”

TLC with TMR
Through the relationship with Strongco, The Cannington Group was an early adopter of Volvo’s total maintenance and repair (TMR) program. This, says Hili, has provided “a three-way win” particularly when teamed with the contractor’s equipment leasing package.

With the confidence of knowing his fixed costs, the customer is highly productive. He has new equipment that is fully supported by the dealership in combination with a modern service team that keeps the equipment running in top shape. This, in turn, keeps the equipment’s residual values high for the manufacturer and allows the dealership to give the customer a better deal on new replacement machines down the road.

For McCrossan, a construction lifer, it’s all good.

“I’m not going anywhere,” he says. “Like I often say, I’m on the Freedom 85 program, so that gives me another 35 years to go. I don’t think this equipment, as good as it is, will last 35 years. So, we’ll definitely be trading and getting new equipment. For sure.”

Staying lean means being flexible
Along with a 38-metric-ton class Volvo EC380E and two 22-metric-ton class Volvo EC220E excavators on the Mississauga soil remediation job, The Cannington Group added one of its two new 48-metric-ton-class Volvo EC480E excavators specifically for the project.

“We wanted to have the biggest excavators that are going to be usable on other jobsites as well,” explains McCrossan. As one of the larger excavators you’ll find in a relatively urban construction setting, “the EC480E is pretty well the biggest one you can float in without having to take it apart.”

It is expected the Mississauga work will wind down around Christmas of this year. “Most of the work we do will be smaller jobs after this until we get that next big project,” says McCrossan. As such, the equipment “needs to be flexible and available” to be dropped off, put right to work and picked back up again every few weeks.

The choice of teammates for the various Volvo excavators on the Mississauga site was likewise strategic, albeit for different reasons. All four of the Volvo articulated haulers are 25-ton A25G models. “We did the numbers on 30-ton rock trucks, even 40-ton rock trucks, and we found the 25s with the low ground pressure are just the ones to go here,” explains McCrossan. “It’s a smallish site, there’s close dumping, so there just wasn’t any advantage in using bigger, costlier trucks that also cost more to run.”

Having owned and managed a fleet of articulated haulers during one of The Cannington Group`s earlier eras as a larger sewer and water main contractor, “we’re very familiar with how to use them, and the best uses for them,” he says, “and this is the perfect application.”



Not a bulk excavation job
Unlike the mass excavation of virgin or agricultural land for future development, a remediation jobsite almost becomes dozens if not hundreds of small excavations of varying widths and depths.

“There are other contractors who have priced this as a bulk excavation job and they were actually cheaper than us,” says McCrossan, “but the client went with us because of our experience with remediation and what is basically a surgical excavation. It’s slow, it’s methodical, and there is a lot of direction in the field from the consultants.

“You can’t just haul away clean materials as impacted. It’s just too expensive.”

The remediation contractor is continually dealing with different contaminants, different depths of contamination and different types of soil, along with the seasonal factors of rain, snow and frost that left the Mississauga site almost bog-like in the spring. Despite the muddy and even flooded conditions, the Volvo A25E articulated haulers were able to bear down and work their way around the site and keep the project moving.

“The job changes by the day, sometimes by the minute, and if we’re waiting for samples and we’re waiting for results and the consultant hasn’t gotten back to us, we need to be able to go from one area to the next and keep working,” says McCrossan. “There needs to be a lot of coordination, a lot of flexibility on-site for us to be able to continue to keep moving.”

When the environmental consultants need to do their testing at key excavation spots the operators can move their machines elsewhere on-site and continue being productive with stockpiling or other maintenance duties.

When lining up a job such as this, the remediation contractor is provided the scope of work, including depths of excavation, known locations of contamination and estimated quantities of material, says McCrossan. “Then it’s up to us as the contractor to look at the resources we need to be able to perform the work,” he explains. “With this one, we basically took their 24-month schedule and said, ‘Not a chance. We can do it in 14.’

“It’s 75 acres in total, but we’re working our way out of space about five months in,” McCrossan explains. “The more we excavate, the bigger the piles of clean material get and the less real estate we have to drive on and to stockpile on.

“It’s going to continuously get tighter.”

Right at home with remediation
With the support of Strongco and Volvo Construction Equipment, McCrossan is right at home doing environmental contracting.

“We’re back to what we do and what we do well,” he says of The Cannington Group. “It’s a good market, it’s an invited market, so we very rarely need to get into public work. With this field, we’re invited to site meetings, we’re invited to bid jobs, and we work on sole-source jobs.

“We’re pretty good at what we do and the industry knows that.” Maximizing the technologies available for its niche work, the company has most recently launched a vibrant UAV or drone program that provides services both on projects in-house and available for outside contract work.

Speaking of being right at home, the site being remediated in Mississauga is actually one of three conjoined properties and The Cannington Group actually worked on preparing the other two properties for their respective next lives.

“It turns out, I knew more about this site than the current owners did,” he says. “I used to come in here on the knee of my dad in his dump truck.”

As the land itself passes from one generation to the next, it seems only fitting The Cannington Group is the one doing the careful nurturing.

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