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Storm Sewer Line and Manhole Remediation Maxymillian Technologies (MT) used tunnel jacking techniques that were successfully employed at the GE Schenectady Facility, to thoroughly decontaminate a 48" diameter storm sewer pipe and associated manholes in the High Yard Area. Primary site activities in MT's responsibility included, removing PCB contaminated sediments, repairing an unknown box structure, and treating water resulting from storm sewer operations. Prior to commencing sediment removal, MT conducted site preparation and established confined space safety and air quality measures. Throughout remediation activities, MT television-inspected all sewer lines and manholes to ensure appropriate removal and cleaning operations. The sediment removal, tunnel jacking method involved the use of a crane over an access point, excavating 110 cy along the pipe by hand, and loading out materials using a rail and cart system. The excavation process allowed for removing approximately 50 feet a day, totaling 14 days for sediment removal. The carts of contaminated sediments were winched out of the confined area and placed in containers for GE disposal. Using the same removal process, MT removed the solidified material in the manholes by hand, winched it out, and placed the soil into GE supplied drums. Following excavation, MT flushed the pipes and manholes with water. Contaminated sewer water was treated in an on-site, MT designed and operated water treatment system. Discharged water was transported to GE's water treatment facility. Upon completing decontamination, MT reset the plates over manholes, removed temporary structures, decontaminated equipment, and restored the site to its original condition.
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Removing sediment from decontaminated conduits. 
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