Dissolved oxygen distribution throughout the lake showed a gradual decline with increasing depth, probably due to the decomposition of organic matter in the bottom waters.

The first verified report of an established population of fanwort in Ontario was made in the summer of 1991 in the North River, immediately downstream of Kasshabog Lake.

The report concludes that: "Unimin is the source of contaminants that are being released to the atmosphere in an amount and manner that is causing the following adverse effects, contrary to the general provisions of the Environmental Protection Act, RSO 1990 (EPA), Section 14: a)impairment of the quality of the natural environment for any use that can be made of it, b) damage to property, c)harm or material discomfort to any person, d)loss of enjoyment of normal use of property.

The Facility operations are the source of contaminants whose observed deposition results in violations of the limits contained in schedule 2 of Ontario Regulation 419?05 (Local Air Quality) for Dustfall.

Unimin is the source of contaminants that are being released to the atmosphere in an amount and manner that is in violation of Part III, section 45 of Ontario REgulation 419/05 (Local Air Quality).".

That report concluded that "the noise impacts from both plants at the monitoring locations were below the applicable MOE guideline limites for Class 3 (Rural) areas".

[9] Following orders from the Ministry of the Environment early in the year, Unimin mine has embarked on a plan to cover tailings areas with vegetations.

As shown in aerial photographs at the Annual Meeting of the Lake Association, significant progress has been made on the Blue Mountain site.

On Friday, July 22, 2013 there was a discharge of dust from the Nepthon tailings area documented through a number of eyewitness accounts, videos and photographs.