Enbridge Pipeline System directly linked to the pipeline. Another point in Lockport, Illinois connects two pipelines to Patoka, Illinois, plus a longer link to Cushing, Oklahoma. A relatively short link from Stockbridge, Michigan connects to two refineries in the Toledo, Ohio area. The Mainline system, conventionally divided into the US and Canadian mainlines, consists of 1900 miles of pipeline that run from central Alberta to southern Ontario via the northern US. The system can carry up to 2.5 million barrels of oil per day. Lines 1 through 4 connect Edmonton to Superior, Wisconsin. From there, Line 5 runs through the Upper Peninsula of
Pipeline transport rain. They are protected from nesting birds, rutting mammals, and stray buckshot. Buried pipe is less vulnerable to accident damage (e.g. automobile collisions) and less accessible to vandals, saboteurs, and terrorists. Previous work has shown that a 'worst-case exposure scenario' can be limited to a specific set of conditions. Based on the advanced detection methods and pipeline shut-off SOP developed by TransCanada, the risk of a substantive or large release over a short period of time contaminating groundwater with benzene is unlikely. Detection, shutoff, and remediation procedures would limit the dissolution and transport of benzene. Therefore, the exposure of benzene