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Groundwater Remediation, completed by Harrowgate Group
Commercial & Heavy-Civil Construction

Groundwater Remediation

Harrowgate Group completes groundwater remediation directly for industrial owners, developers, engineers, and municipalities across Toronto, the GTA, and Ontario, with the equipment, field controls, documentation, and civil restoration kept under one accountable construction team.

(416) 629-0721
  • Licensed, Insured & WSIB-Covered
  • 20 Years in Business

Get a Quote

Tell us what you need and we’ll get you a quote. Licensed, insured & WSIB-covered · Free, no-obligation quote & on-site assessment.

Free, no-obligation quote & on-site assessment · licensed, insured & WSIB-covered.

or
Call (416) 629-0721

Get a Quote

Licensed, insured & WSIB-covered · Free, no-obligation quote & on-site assessment.

Free, no-obligation quote & on-site assessment · licensed, insured & WSIB-covered.

or
Call (416) 629-0721
20 Years in Business
Licensed, Insured & WSIB-Covered Completed to code & Ontario requirements Completed on site and built to the drawings Performed & installed on site across Ontario
Why Harrowgate Group

What to expect from groundwater remediation

Built to spec

Built to your engineered drawings, survey, and the real site conditions, not a one-size-fits-all approach forced to fit.

Made to last

Durable materials and methods chosen for the load, traffic, and environment on site.

Quote-ready

Send specs, drawings, or photos and get a free, no-obligation site visit and estimate with no guesswork.

Code-conscious

Installation and site work completed in accordance with Ontario requirements.

Our Process

How we plan and deliver groundwater remediation

Groundwater remediation removes or treats dissolved contaminants and free product so an Ontario site can meet its approved remedial or risk management objectives. Harrowgate installs and operates extraction, separation, treatment, conveyance, and discharge systems across Toronto and the GTA, coordinating field work with the owner's Qualified Person and discharge authority.

  1. 01 Send your inquiry, a few photos or a description of the site.
  2. 02 We come out, assess the site, take measurements, and confirm the scope.
  3. 03 We complete the groundwater remediation on site, to the load and finish the job needs.
  4. 04 We install it, finish to grade, and clean up, one accountable crew, start to finish.
Groundwater Remediation being built and completed on site by Harrowgate Group
Local Context

A closer look at groundwater remediation

Scope

Understanding groundwater remediation

How we complete groundwater remediation by Harrowgate Group

How we complete groundwater remediation

Our groundwater remediation sequence starts with verified site information, controlled work zones, and written acceptance points, then moves through field execution, consultant inspection, records, and restoration. We assign each material, asset, sample area, and load a defined status so crews know what can move, what must remain exposed, and who releases the next step.

We confirm monitoring well locations, groundwater elevations, plume boundaries, utilities, and the proposed discharge route. Work can include extraction wells, sumps, well vaults, double contained hose or pipe, pumps, equalization tanks, separators, bag filters, granular activated carbon vessels, meters, and secure sampling points. During operation, we record flow totals, water levels, pressure changes, filter condition, carbon changeouts, recovered product, and discharge samples. A bypass or overflow path is never improvised. Alarms, secondary containment, freeze protection, and response contacts are established before unattended operation.

Our field supervisors keep excavation, water handling, trucking, imported materials, survey, and environmental hold points on the same daily plan. We record quantities, load destinations, unexpected conditions, and completed limits as the work advances. That discipline gives the owner and Qualified Person a clean record of what happened below grade, where it happened, and what remains for acceptance.

Materials, specs, and Ontario standards by Harrowgate Group

Materials, specs, and Ontario standards

Materials and acceptance criteria for groundwater remediation come from the current Ontario requirements, approved drawings, consultant documents, receiving facilities, and owner standards that apply to the actual site. We check those criteria before procurement or hauling, record field changes, and preserve the evidence required for inspection, environmental review, and future construction.

Discharge criteria come from the receiving system and approval, not a generic number. Sewer discharge requires the applicable municipal bylaw and any permit or agreement. Surface discharge or other environmental release may require provincial approval.

Treatment vessels, hoses, electrical supply, and secondary containment are sized for the design flow and expected contaminant loading. Sampling ports are located before and after treatment units so performance can be verified without dismantling the train. In winter, exposed lines need insulation, heat tracing where designed, positive drainage, or heated enclosure.

Ontario Regulation 153/04 governs the assessment and evidence used for many Records of Site Condition. The applicable numerical standard depends on property use, groundwater use, soil texture, depth, and whether the project follows generic or accepted risk based criteria. We execute to the Qualified Person's written criteria and preserve traceability. Ontario Regulation 406/19 and the Rules for Soil Management apply when excavated soil becomes excess soil.

What goes wrong, and how we prevent it by Harrowgate Group

What goes wrong, and how we prevent it

Groundwater Remediation fails when field production gets ahead of characterization, isolation, inspection, or documentation. Harrowgate prevents that gap with staged work, clearly marked hold points, segregated materials, daily records, and immediate escalation of changed conditions. The goal is to protect people and operations while avoiding rejected loads, concealed deficiencies, repeat excavation, and schedule loss.

Common failures include short circuiting around extraction points, sediment blinding filters, carbon breakthrough, frozen lines, unmetered bypass, pump cavitation, and drawing contaminated water beyond the intended capture zone. Discharging before analytical release can create a reportable problem. We commission the system at controlled flow, verify hydraulic response in nearby wells, stage filtration, monitor differential pressure, and keep spare consumables ready. Rain and excavation inflow are separated from impacted groundwater where possible so clean water does not overload treatment.

We review the next two weeks of work against approvals, sampling, deliveries, shutdowns, and weather. Daily pre work discussions identify the exact limits and status of each area. Photographs and measurements are taken before concealment, and unresolved items stay visible on the field log until the responsible reviewer provides direction or acceptance.

Have drawings for groundwater remediation? Send them over and we will scope it.

Call (416) 629-0721
FAQ

Groundwater Remediation FAQ

What information is needed before groundwater remediation starts?

We start with contaminant chemistry, plume geometry, aquifer response, and discharge destination. We also confirm access, utilities, operating restrictions, consultant responsibilities, notices, and the intended endpoint. Resolving these items before mobilization lets the field team establish controls, receiving routes, hold points, and contingency space instead of making compliance decisions beside an open excavation.

What drives the schedule and scope for groundwater remediation?

The main drivers are design flow, treatment media, monitoring duration, winterization, and sampling frequency. Weather, laboratory turnaround, inspection availability, and working hours can also control production. We build the sequence around the slowest approval or physical constraint and identify parallel tasks that continue without covering work, mixing materials, or compromising a required hold point.

Which Ontario requirements apply to this work?

The governing requirements depend on the material, property, equipment, and approval. The work can involve municipal sewer permission or applicable provincial approval before discharge. We confirm the current project specific criteria with the engineer, Qualified Person, owner, municipality, or TSSA as applicable. A general industry practice never replaces the written requirement that governs the actual site.

How does Harrowgate document groundwater remediation?

Our field record includes meters, water levels, differential pressure, laboratory data, and product recovery logs. Entries are tied to dates and work areas so quantities and events can be reconstructed. We reconcile documents during the job, not only at closeout, which gives the owner and consultant time to correct a missing ticket, unclear location, or inconsistent quantity before demobilization.

How are unexpected site conditions handled?

We use settling, filtration, oil water separation, carbon, or specified chemical treatment. Work pauses until the condition is safe, isolated, and assigned a documented response. The supervisor records what changed, where it occurred, who provided direction, and how material or equipment was controlled, preventing an unexpected discovery from contaminating accepted work or disappearing from the record.

Can the work proceed while the facility or project remains active?

Yes, where the design permits it. We plan free product skimming and controlled recovery without spreading the plume. The operating boundary, shutdown windows, truck route, emergency access, controls, and daily handback condition are agreed before work starts. Production is staged so facility staff and construction crews do not share uncontrolled access to the work zone.

What should be included in the final field record?

Closeout should include shutdown response, containment capacity, alarms, and spare pumps or media. Depending on the project, it can also include photographs, surveys, receiving records, inspection releases, operating logs, test results, redline drawings, and a list of remaining assets. The package supports the owner's consultant and operations team, but professional certifications remain with the appropriately qualified person.

Still have a question about groundwater remediation? Ask our team directly.

Call (416) 629-0721
Our Work

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Commercial and heavy-civil construction delivered for developers, contractors, property managers, and municipalities.

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Get a quote for groundwater remediation

Send drawings, a site plan, or a description of the scope. Harrowgate Group is licensed, insured, and WSIB-covered.

(416) 629-0721

Licensed, Insured & WSIB-Covered, work managed and documented on every job

Send your project details

Tell us what you need and we’ll get you a quote. Licensed, insured & WSIB-covered · Free, no-obligation quote & on-site assessment.

Free, no-obligation quote & on-site assessment · licensed, insured & WSIB-covered.

or
Call (416) 629-0721

Companies We've Worked With

Trusted by Leading Organizations

Harrowgate Group delivers commercial and heavy-civil construction for developers, contractors, institutions, municipalities, and property groups across Ontario.

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