Utah Admin. Code R307-312-4 - Visible Emissions
(1) Visible
emissions from sources subject to R307-312 shall not exceed the opacity limits
as specified in Table 1. TABLE 1 CATEGORY OPACITY LIMIT Crushers 12% Screens 7% Conveyor transfer points 7% Concrete batch plants 7%
(2) Opacity
Observation.
(a) Opacity observations of
emissions shall be conducted according to 40 CFR 60, Appendix A, Method
9.
(b) The duration of the Method 9
observations shall be 30 minutes (five six-minute averages).
(c) Compliance shall be based on the average
of the five six-minute averages. The duration of Method 9 may be reduced to 6
minutes (one six-minute average) if the first six-minute average is below the
limit specified in Table 1.
Notes
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