The resultant objectives pertaining to the mining industry
were approved in early 1974 by the P.C.B. Director, and
therefore serve as the basis for acceptance or rejection
of all Permit Applications from the industry.

The P.C.B. Objectives are defined for both ambient
air and emissions (gaseous and particulate). Insofar as
the B.C. Asbestos Industry (Cassiar Mine) is concerned,
specific objectives have yet to be defined as asbestos
pollution is still under review. However, the P.C.B. have
indicated that until such time as definite objectives are
set for asbestos, the existing objectives for the mining
industry as a whole are to serve as guidelines.

Relevant objectives are outlined in Tables 2 and 3,
which follow. There are three objective levels, namely
A, B, and C, in order of increasing pollution. All existing
installations are expected to conform to at least Level C,
with scheduled upgrading to Level B and then to Level A.
Any new or planned facility must meet Level A objectives
for Permit issuance. The P.C.B. objectives at each level
are allowable maximums. As previously stated, no definite
objectives have been specific for asbestos so far, but it
is anticipated that once standards are legislated they will
no doubt be similar to those already existent for such sub-
stances as coal and coke dust, where for example to meet
Level A Total Suspended particulate matter no more than 5
micrograms per cubic meter of the 15 (allowable above back-
ground) may actually be coal or coke dust. Any timing
requirements involved for upgrading existing emissions to
Level A are determined on an individual site - specific
basis. In any upgrading program, attention is directed
towards net overall final waste loss reduction in conjunction
with waste toxicity reductions, the two going hand in hand
for most cases.

Emission Permit Applications have been made by Cassiar
for both Plantsite and Minesite areas in recent years. The
Government has allowed us to withdraw the Minesite Permit
Application in view of the fact that no significant point
source (stack) emission will exist at that location by 1976,
at which time the drills shall be baghouse equipped, and the
remaining crushing plant shall be baghouse equipped with
filtered air recirculated internally.