Explanation
1. BACKGROUND
This legislation authorizes the Director of Public Service to modify and increase the construction contract with Double Z Construction Company for the Bridge Rehabilitation - James Road Over Mason Run North of 7th project in an amount up to $95,021.26 to reimburse the contractor for cost incurred to remove contaminated soil. No additional funds are needed for inspection services.
On 9/20/12, during the excavation for the footings for the wingwalls on the proposed culvert over Mason Run, the contractor encountered soil that they believed may be contaminated. The soil had a diesel fuel type smell and was almost black in color. The contractor encountered this soil around 1pm and shortly thereafter called Lawhon & Associates, Inc. so that they could get a soil sampling. Lawhon arrived on site the next day and retrieved a soil sample and it was then sent to Advanced Analytics Laboratories for rush analysis. A soils report was published by Lawhon & Associates on 9/25/12 showing that many compounds were found within the samples with the largest concentrations being Trichloroethene (TCE). These concentrations were above soil standards according to the EPA. The contractor was asked to suspend excavation activities until the soil could be removed. During that time, Lawhon & Associates took additional soil samples to determine the limits of contamination. It was concluded that the entire footprint of the footings and box culvert would be removed to a depth of one (1) foot below the bottom of the proposed footings and capped with a one (1) foot layer of CDF.
The excavation of the contaminated soil was performed on 10/4/12 by Enviroserve. This excavation was also monitored by Lawhon & Associates. Another sample was taken and sent to North Coast Environmental Laboratories to be fully analyzed to determine the best method for disposal. Ten containers were used to store the excavated material on site until it could be transported for ...
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