Subpart 257-6: Ambient Air Quality Standard-Hydrocarbons (Non-Methane)
(Statutory Authority: Environmental Conservation Law, § 15)
[Filed 2/16/77. Effective 30 days after filing.]
[This is page 1 of 1 of this Subpart. A complete list of Subparts in this regulation appears in the Chapter 3 contents page. A list of sections in this Subpart appears below.]
For administrative information about this posting, contact: Division of Air Resources. The Bureau of Air Quality Planning at (518) 402-8396 or the Bureau of Stationary Sources at (518) 402-8403 is the contact for technical questions pertaining to this rule.
Hydrocarbons are organic compounds consisting only of hydrogen and carbon. However, for the purpose of this Subpart, hydrocarbons (non-methane) shall refer to the total air borne hydrocarbons and other organic compounds excluding methane (CH4) as measured by the specified technique, or other method acceptable to the commissioner.
Although ambient air concentrations of gaseous hydrocarbons as a group have not been associated with health effects, it has been demonstrated that ambient levels of photo-chemical oxidant which do have adverse effects on health are associated with the occurrences of concentrations of non-methane hydrocarbons. The objective of this standard is to inhibit such photochemical reactions which lead to photochemical smog formation.
During the three-hour period from 6 to 9 a.m., the average non-methane hydrocarbon concentration must not exceed 0.24 ppm1 more than once in any 12 consecutive months.
1Corresponds to Federal standard of 160 µg/m3 (at temperature of 25oC and pressure of 760 mm of mercury).
(a) Hydrocarbons (non-methane) is determined by the flame ionization technique with correction for methane by a methane analyzer.
(b) All measurements are corrected to a reference temperature of 25 degrees Centigrade and to a reference pressure of 760 millimeters of mercury.