N.M. Code R. § 20.2.43.116
B. Particulate matter emissions governed by this section shall be determined by the method described in 36 Federal Register No. 247, p. 24888 (Dec. 23, 1971) where technically feasible. Where not technically feasible to use this method, samples shall consist of at least one cubic foot of gas and collected over a period of at least twenty minutes.
[11/23/98; 20.2.43.116 NMAC - Rn, 20 NMAC 2.43.116 10/31/02]