Based on all information received to date, we have arrived
at the computations below:

TONS/SO.MI./MONTH
a) Dustfall: ARITHMETIC MEANS

Before Mid 1974 Since June 1974 % Reduction

Cassiar Townsite: 8 71
Cassiar Plantsite: 261 81
East Cassiar: 18 75
Overall: 96 80

Dust fall in the Townsite and East Cassiar is within limits.
Plantsite dustfall is very high even now, but reflects
D.R.S. and Mill fugitive dust losses in the sampling area.

b) Suspended Particulate:

No annual geometric mean has been calculated, but 24 hour readings
meet Level A on Carmacks St., meet Level C at the Retail Store,
and on occasion do not meet Level C at the Truck Parking Lot or
Bill Rattray's House.

c) Sulphation Rate:

At all areas is less than 0.1 milligram of Sulphur trioxide per
100 square centimeters per day, and well within limits.