MONITORING PROGRAMS

From 1953 to the present, in-plant environmental

conditions have been monitored on a continuing

basis and have shown progressive improvement. In-

plant conditions, however, are not regulated by the
Pollution Control Aces 2967, it's Regulations: “or
Objectives. As a consequence, in-plant conditions

are not reviewed in this brief.

In early 1974, an Environmental Department was
instituted at Cassiar and has developed monitoring
programs in close co-operation with the Pollution
Control Branch, and others, using accepted methods.
Prior to 1974, monitoring was performed, but only
in limited areas. Locetien of ambient sampling
stations is indicated on Appendix C site plan. The

Cassiar monitoring data is summarized in Appendix D.

Monitoring programs have been used to obtain measure-

ments OL:

a) Water quality

b) Effluent quality

c) Ambient air quality including:
- dustfall
- suspended particulate
- particle size distribution
- asbestos concentration

= sulphation index

meteorological information