In 1993 BC Environment established a high volume inhalable particulate monitor on the roof of the Terrace Firehall to establish a basic inhalable particulate inventory in the Terrace area. As a result of the exceedences, BC Environment designated Terrace in need of continuous inhalable particulate monitoring and assessment and related air quality management. In fact, subsequent analysis of data generated from the continuing monitoring programme at the BC Hydro building site has shown strong correlation with data from the Access Centre. This is depicted in the chart below. Current Air Quality Conditions Current air quality conditions are available by clicking the image to the right.
Data capture can be a measure of monitoring programme performance.
It is important with respect to assessing the 'representativeness' of a programme for characterising a particular location over a given period of time. The data capture results of the Terrace Firehall high volume sampler and Access Centre TEOM are summarised in the table to the left and the chart below. It should be noted that the sampling programme was initiated in October 1993. A continuous analyser is obviously better than a discontinuous sampler in characterising air quality. Air Quality Trends Air quality trends are presented below assessed by the measures of central tendency, BC Environment air quality objective exceedence frequencies, and frequency distribution of the BC Environment Air Quality Index .