1. a colorless oily fuming liquid, N2H4, used as a reducing agent and a jet-propulsion fuel. 2. a class of substances derived from this substance by replacing one or more hydrogen atoms by an organic group.
More than 150 companies and government entities could be asked to cover their share of the cleanup costs. On Nov. 18, the EPA submitted a nearly $1.4 billion cleanup option for the Portland Harbor Superfund site to the National Remedy Review Board, which serves as a peer review panel for Superfund projects.
Dugout costs will vary according to each site and its soil and moisture properties. The average cost for excavating, landscaping, and installing inlet control on a dugout of 50m x 20m x 5m deep (with a capacity of 2 million litres) is $4,000 to $7,000.