Title
143rd Street and LaGrange Road Intersection Improvements - Contaminated Soil - Brothers Asphalt Change Order
History
At the March Committee and Board meetings, an item was prepared and presented allocating $20,000 for Environmental Engineering Oversight by V3 Companies to address suspected contaminated soils that may be found during the course of the watermain relocation project. When that item was presented, the Committee was advised that quantities and costs were being compiled for the related construction costs associated with the investigation, excavation, transport and disposal of the contaminated soils that were going to be excavated.
Following soil samples taken and analyzed from the four corners where contaminants were suspected and the recent removal of the “Orphan Tank” at the 7-11 site, it is the belief of the Engineers that the extent of contamination may be greater than what had been earlier anticipated. The “Orphan Tank” removal was a very successful project, but it did show that there is significant contaminated material that must be dealt with.
The scope of the work involved in the management of contaminated soils is limited to the soils and water that must be removed during the course of the watermain relocation excavation. Contaminated soils excavated must be handled specially and any ground water that has to be pumped out to dewater the construction site must also be tanked to a licensed disposal facility. Additionally, to ensure that the contaminants do not deteriorate the gaskets and sealants used to join the pipe and valve sections, special gaskets (made to order) must be purchased and installed on the pipe and valves within the areas of contamination. If the special materials are not used, the seals will quickly deteriorate, leading to premature leaks and system failures.
Counsel has been working closely with Engineering in an effort to ensure that the Village’s ability to recoup these added costs is positioned as best as ...
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