Case Studies | Golden Environment 2

INDUSTRIAL TCE SITE
BRAMPTON

Approximately 4250 m3 of TCE impact in the soil and groundwater.
After years of manufacturing, TCE had migrated into the soil and groundwater underneath the building and areas under the parking lot and driveways.
Active business on site. Remediation plan must allow for business to continue operations during implementation.

Remediate soil and groundwater in-situ as to not interrupt day to day operations of business.
Install injection wells inside building and operating parking and drive areas using flush mount caps and removable injection heads.
Inject organic carbon substrate with micronized ZVI into impacted areas.
Ensure site is clean to ensure minimal disruption to operations.

Business continued operations uninterrupted during injection process.
Consultant confirmed amendment had spread throughout contaminant zone.
3 of 4 monitoring wells met MECP Table 3 standards between 6 and 24 months.
Few residual daughter compounds in select monitoring wells at 24 months.
Reducing conditions still active in substrate at 24 months.
Engineering Consultant remarks at 24 month monitoring event; “Overall the results are again very positive. We are seeing VOC concentrations decrease significantly at the Site.”
(GHD Report 24 Month Performance Monitoring Result)

Approximately 600 litres of heating fuel discharged from the holding tank inside the garage adjacent to the home
Oil had migrated beneath into the bedrock and made its way into the well which supplied the home
Oil was seen coming from the taps of the home
Three car garage, all brick, raised bungalow of approximately 4000 sq.ft built on top of limestone bedrock

Established clean water supply for residence and flushed plumbing system
Used existing water well as recovery well and installed Mobile Treatment Unit (MTU) to establish hydraulic containment

Used BIM200 to remediate impacted concrete floor
Installed screened wells along perimeter of impacted zone
Installed injection point at source of impact
Installed injection system connecting all wells
Used existing water well as recovery well, injected stabilized hydrogen peroxide into screened wells and drew towards recovery well
Upon achieving MOE compliance standards, decommissioned former water well and installed new well up stream as water supply

Manufacturing facility using hexavalent chromium in their processes for over 45 years.
More than one historical spill of hexavalent chromium reported at the facility.
Heavily impacted ground water zone approximately 1300 m3.
Client needed to remediate the saturated zone before tenant could move in.

Approximately 45 cubic meters of micronized zero valent iron was to be placed in the saturated zone.
Approximately 109, 2" core holes were drilled through the concrete for direct push access.
ZVI was mixed with a suspension agent and then injected into the target zone.
Approximately 220,000 liters of amendment was injected into the target zone.