7 Del. Admin. Code § 1114-2.0
Current through Register Vol. 28, No. 7, January 1, 2025
No person shall cause or allow the emission of visible air contaminants or smoke from a stationary or mobile source, the shade or appearance of which is greater than 20% opacity for an aggregate of more than three minutes in any one hour or more than 15 minutes in any 24 hour period. For guideline purposes only, Shade Number 1 of the Ringlemann Smoke Chart coincides with the regulatory limit of 20% opacity, when observing black smoke.
7 Del. Admin. Code § 1114-2.0
21 DE Reg. 883 (5/1/2018) (Final)