In terms of gross overall costs, on the basis
of 100 samples:

CONSULTANT CASSIAR

Samples $20000 $3000
Labour $ 6000 $2000
Equipment N.A. $ 10000

Transport &
Accomodation $ 1500 N.A.

Misc. § 2600 $2000

-$30,100_ $17,000

It is therefore not considered economic to
perform our own emission stack sampling unless a
sufficient number of samples are required. If the
sampling is to be of a continuing nature, and
require say perhaps 30 to 50 samples, it is rec-
ommended Cassiar purchase equipment required and
perform the analysis.

AMBIENT AIR

Ambient air quality monitoring is used at
Cassiar to measure such parameters as suspended
particulate matter (amount of solids not settling
to the ground but which remain suspended due to
their small size), dustfall (particulate matter
which does settle out of the atmosphere), and sul-
phation rate (relative quantities of sulphur dioxide
in the air.) Other parameters such as soiling index
and nitrous oxides are not measured since the former
three provide the most needed current information.