Overburden thickness on the site varies
between 5.2 to 6.7 metres, and is comprised of fill or till. The
fill layers on either side of the Victoria Road overpass have a
similar thickness, suggesting the possibility of a hydraulic link
between the two. The contact surface of the Canso and Morien Groups
is located near the eastern perimeter of the steel plant property,
presenting the possibility of a geologic barrier or impediment to
contamination moving toward SYSCO property from the Coke Ovens site.
Analytical results contained in the JDAC report indicate that heavy
metals (arsenic, thallium, selenium, titanium, lead, copper, zinc,
and vanadium) and PAHs were detected at levels that exceed the Canadian
Council of Ministers of the Environment (CCME) guideline values
for commercial sites. HNC and petroleum hydrocarbons were also detected,
but at concentrations below the applicable guideline values.
In groundwater, heavy metals (sulphur, manganese, iron, and strontium)
concentrations exceeded the Canadian Drinking Water Quality Guideline
values, as did some PAH concentrations. Petroleum hydrocarbons were
detected at concentrations below the applicable NSDEL Tier 1 guideline
value, and PCB analyses failed to detect their presence. The extent
of these impacts has not yet been determined, and no testing has
been performed inside the steel plant fence line.
The No. 3 Gate House and parking is presently located within the
parcel. The building is constructed of a combination of concrete
and wood. Potential hazardous building material and environmental
issues associated with the Main Gate House may include lead-based
paints, asbestos containing material and PCB fluorescent
The majority of open space in this area is covered with granular
materials. Slopes at certain locations show signs of surface erosion.
Stormwater catchbasins are located throughout the area, presenting
the possibility of siltation and sediment impacts to receiving waters.