(a) Maximum Emissions. Emissions of smoke shall not exceed the maximum permitted smoke units as defined herein and Ringelmann Number ratings in Table 39, subsection (b) hereof.
(b) Table 39: Maximum Smoke Emissions.
During 1 Hour Per 24-Hour Day* | All Other Times | |||
Heavy Industrial | Other | Heavy Industrial | Other | |
Maximum permitted smoke units per hour per stack*** | 32 | 16 | 16 | 8 |
Highest Ringelmann number permitted | 3** | 2** | 2 | 1 |
Notes for Table 39
* When blowing soot or cleaning fires.
** For a maximum duration of three minutes.
*** The number of smoke units is the product of the Ringelmann Number and the number of minutes the smoke is visible.
(Ord. 87-94. Passed 7-27-87.)