1. A. A vehicle other than a diesel-powered vehicle or 2-stroke vehicle that emits any visible emissions for 10 consecutive seconds or more is “excessive” for the purposes of A.R.S. § 28-955(C).

2. B. A diesel-powered vehicle shall not emit any visible emissions in excess of:

   1. 1. Twenty percent visual opacity for 10 consecutive seconds or more at or below 2,000 feet elevation;
   2. 2. Thirty percent visual opacity for 10 consecutive seconds or more above 2,000 feet and at or below 4,000 feet elevation; and
   3. 3. Forty percent visual opacity for 10 consecutive seconds above 4,000 feet elevation.
3. C. A vehicle that exceeds the standards in subsection (B) fails the inspection under R18-2-1006 and is considered to have “excessive” emissions under A.R.S. § 28-955(C).

Historical Note

Adopted effective January 3, 1977 (Supp. 77-1). Amended as an emergency effective January 2, 1981, pursuant to A.R.S. § 41-1003, valid for only 90 days (Supp. 81-1). Former Section R9-3-1030 as adopted effective January 3, 1977, and amended as an emergency effective January 2, 1981, now amended effective April 15, 1981 (Supp. 81-2). Amended effective January 1, 1986 (Supp. 85-6). Amended subsection (C) effective January 1, 1987, filed December 31, 1986 (Supp. 86-6). Former Section R9-3-1030 renumbered as Section R18-2-1030 and subsection (C) amended effective August 1, 1988 (Supp. 88-3). Amended effective September 19, 1990 (Supp. 90-3). Amended by final rulemaking at 6 A.A.R. 562, effective January 14, 2000 (Supp. 00-1).