A historic leak from a UST released over 19,000 L of gasoline directly into the subsurface over a five year period. Extensive borehole drilling and monitoring well installations were completed. A downgradient area of high PHC concentrations was discovered extending
Chlorinated Solvents Treated Using “Trickle-Down” Method
Historic releases over many years caused significant vertical migration of PCE into soil and ground water. Major challenge encountered: impacts greater than 6 mbgs in silty clay till beneath occupied building.
Bedrock Drinking Water Well Protected
At a trailer park in Eastern Ontario, two tanks released heating oil into the underlying unconsolidated and fractured rock. Though much of the affected overburden was excavated, a petroleum hydrocarbon plume and associated free phase remained in the fractured bedrock,
In-Situ Injections Revitalize Historic Site
Historical leaks from a series of underground tanks and pipes were indentified at a former fuel dispensing facility in Toronto. The leakage had created an underground plume over an area of approximately 1,000m2. Excavation was deemed to be technically challenging
Vertex Saves Wells without Disrupting Residents
A spill near a residential area in Quebec released petroleum hydrocarbons into the underlying groundwater and soil. The accident posed a risk to nearby wells, endangering the local water supply. PHC contaminants included: Benzene, Toluene, Xylene
Residential Area in Quebec
Near a residential area in Quebec, an accidental release of petroleum hydrocarbons from a spill into the underlying groundwater and soil posed a risk to nearby water supply wells. Groundwater concentrations for selected PHCs included: Benzene (maximum concentration of 146
Industrial Site in New Jersey
At an industrial site in New Jersey, historical leakage from a UST released petroleum hydrocarbons into the underlying groundwater and soil creating a health and ecology risk to overlying and down gradient receptors. Soil concentrations of PHCs included: BTEX (maximum
Remote Residence Leaked Petroleum Hydrocarbons
At a remote residence, petroleum hydrocarbons leaked from a UST into the underlying groundwater and soil creating a health and ecology risk to the residents and local environment. Soil concentrations of PHCs included: BTEX (maximum concentration of 152 μg/g) F1
Operating Manufacturing Facility
At an operating manufacturing facility, free phase petroleum hydrocarbons were discovered underneath the facility. Soil concentrations of PHCs included: BTEX (maximum concentration of 5 μg/g ) F1 & F2 (maximum concentration of 4,920 μg/g ) F3 & F4 (maximum concentration of 44,000
Rural Residence Heating Oil Storage Tank
At a rural residence, petroleum hydrocarbons leaked from a heating oil storage tank into the underlying groundwater, rock and soil. The release created potential health and ecological risks for the residents and local environment. Soil concentrations included: PHC (maximum concentration of