acid sludge

acid sludge [ acidic sludge ]

acid sludge

drilling fluid engineer | mud engineer

invert-oil mud [ invert-emulsion mud | invert-oil-emulsion mud | inverted oil-emulsion mud ]

mud logging technican | surface logging technician | mud logger | surface logging specialist

[An acid sludge by-product of the sulfuric acid refining of crude high temperature coal. Composed primarily of sulfuric acid and organic compounds.]

Q-97 — Mr. Stoffer (Sackville Musquodoboit Valley Eastern Shore) — In regard to the Tulsequah Chief Mine project: (a) which of the seventy stream crossings, sixty-four culverts and seven bridges to be undertaken in association with the proposed project pose the highest risks to the spawning or rearing habitats of chinook, sockeye, coho, pink, chum salmon, and to the water quality in the area; (b) which of the proposed undertakings pose the greatest risk to other fish species in the area such as Dolly Varden char and whitefish, and cutthroat, bull and steelhead trout; (c) what are the estimated costs to pump back and treat the metals tailing seepage entering the Shazah wetland as a result of the project operations; (d) what are the concer ...[+++]ns of the Department of Fisheries and Oceans related to post-closure issues and road issues including fish passage at crossings, sediment release from the road, the status of roads post-closure, habitat displacement at causeways, and the geotechnical stability of the road; (e) does the government acknowledge and support requests from the community, fishermen associations, NGOs, and the State of Alaska for the project to be referred to the Pacific Salmon Commission for study and recommendations, and if not, why not; (f) will government approval for the project constitute a breach of the " safe passage" provision in the Pacific Salmon Treaty, and if not, why not; (g) what is the government's methodology for the calculation of reclamation bonding to limit taxpayer liability given the mine's remote location and acid mine drainage risks to critical fish habitat; and (h) why has the site never been reclaimed and acid drainage from the mine, identified by Environment Canada in 1995 as acutely toxic to fish, been allowed to continue to flow into the Tulsequah River?

Mine water and waste mill slurry may be extremely acid or alkaline and may contain suspended solids, residual mine mill chemicals, heavy metals, ammonia and, in the case of uranium mines, radioactive substances.

When Mr. Colvin made his original statement last month, the government's typical knee jerk reaction was to smear Mr. Colvin's reputation by associating him with " people who throw acid in the faces of schoolchildren" .