N.M. Code R. § 20.2.18.112
Particulate matter emissions governed by 20.2.18.109 NMAC and 20.2.18.110 NMAC shall be determined by a method consistent with the method set forth by the US EPA at 40 CFR, Part 60, Appendix A, Methods 1 through 5 or any other equivalent method receiving prior approval from the Department. Upon request of the Department, the owner or operator of oil burning equipment regulated by 20.2.18.109 NMAC and 20.2.18.110 NMAC shall perform stack testing according to the method stated above and report the results of such tests in the format and time period specified by the Department. The owner or operator shall inform the Department of the dates and times of such testing so that the Department may have an opportunity to have an observer present during testing.
N.M. Code R. § 20.2.18.112