|Location:||Fort Erie, ON|
In September 2013, a transport truck owned by a USA-based hauling company rolled-over at an intersection outside of Fort Erie, Ontario. As a result of the truck roll-over, approximately 17,000-liters of diesel fuel was released to the asphalt road surface. During the release, a significant quantity of diesel fuel entered a catch basin at the intersection, which discharged to Frenchman’s Creek. A Canadian licensed spill response and remedial contractor (the contractor) was involved with the spill response and clean up of the asphalt paved road, as well as the creek. The contractor dealt directly with the MOECC and local Conservation Authority to ensure that the Creek and banks were sufficiently cleaned to their standards. According to the contractor, the storm sewer pipe to which the catch basin was connected was found to have been displaced approximately 15 to 25 centimeters (6 to 10 inches) resulting in the release of diesel fuel to the subsurface soil.
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In May 2014, XCG was contracted by the owner of the transport truck’s USA-based insurance company to conduct the soil verification sampling following the removal of the impacted soil from the subsurface surrounding the catch basin and the displaced storm sewer lines. During the excavation activities, XCG was on-site to field screen the base and sidewalls of the excavation to assist the contractor in determining the limits of the excavation. The excavation extended east to Frenchman’s Creek and west to a drainage ditch. The maximum depth of the excavation was 4.5 metres bgs with a final floor area of 360 square metres. Approximately 1,490 tonnes of impacted soil was excavated and removed by the contractor for off-site disposal at Niagara Waste (Walkers Landfill) in Thorold, Ontario. Approximately 458,140 litres of accumulated stormwater was pumped out of the excavation and sent for off-site treatment/disposal. Following removal of all soil exhibiting field evidence of hydrocarbon-impacts, XCG collected confirmatory soil samples from the base and sidewalls of the excavation as well as the adjacent creek bank. The samples collected were field screened utilizing a RKI Eagle combustible gas monitor (calibrated to hexane) in order to determine the presence of total organic vapours (TOV). The excavation was subsequently backfilled with MTO approved gravel from a local gravel pit and the road was repaved and new curbs installed.
The laboratory analytical result reports indicated that there were no detections of petroleum hydrocarbons (PHCs) or benzene, toluene, ethylbenzene, and xylene (BTEX) above the laboratory reportable detection limits; and accordingly, all parameters meet the applicable MOECC Table 9 Site Condition Standards. A summary report was provided to the client and the MOECC documenting the clean-up activities and confirmatory results. The MOECC was satisfied with the results.