Hourly Emissions
(15) Hourly Emissions means the pounds per clock hour of SO2 emissions from a source (including, but not limited to, a flare, stack, fuel oil system, sour water system, or fuel gas system) determined using hourly averages and rounded to the nearest tenth ( 1/10) of a pound. (16) The initials H2S mean hydrogen sulfide. (17) Integrated sampling means an automated method of obtaining a sample from the gas stream to the flare that produces a composite sample of individual aliquots taken over time. (18) The initials MBER mean the Montana Board of Environmental Review. (19) The initials MDEQ mean the Montana Department of Environmental Quality. (20) The initials mm mean millimeters. (21) The initials MSCC mean the Montana Sulphur & Chemical Company. (22) Pilot gas means the gas used to maintain the presence of a flame for ignition of gases routed to a flare. (23) Purge gas means a continuous gas stream introduced into a flare header, flare stack, and/or flare tip for the purpose of maintaining a positive flow that prevents the formation of an explosive mixture due to ambient air ingress. (24) The initials ppm mean parts per million. (25) The initials SCFH mean standard cubic feet per hour. (26) The initials SCFM mean standard cubic feet per minute. (27) Standard Conditions means (a) 20 C (293.2 K, 527.7 R, or 68.0 F) and one (1) atmosphere pressure (29.92 inches Hg or 760 mm Hg) for stack and flare gas emission calculations, and (b) 15.6 C (288.7 K, 520.0 R, or 60.3 F) and one (1) atmosphere pressure (29.92 inches Hg or 760 mm Hg) for refinery fuel gas emission calculations. (28) The initials SO2 mean sulfur dioxide. (29) The initials SWS mean sour water stripper. (30) The term 3-hour emissions means the amount of SO2 emitted in each of the eight (8) non-overlapping 3-hour periods in a calendar day, expressed in pounds and rounded to the nearest tenth ( 1/10) of a pound, where: (31) The term 3-hour period means any of the eight (8) non-overlapping 3-hour periods in a calendar day: Midnight to 3 a.m., 3 a.m. to 6 a.m., 6 a.m. to 9 a.m., 9 a.m. to noon, noon to 3 p.m., 3 p.m. to 6 p.m., 6 p.m. to 9 p.m., 9 p.m. to midnight. (32) Turnaround means a planned activity involving shutdown and startup of one or several process units for the purpose of performing periodic maintenance, repair, replacement of equipment, or installation of new equipment. (33) Valid means data that are obtained from a monitor or meter serving as a component of a CEMS which meets the applicable specifications, operating requirements, and quality assurance and control requirements of section 6 of ConocoPhillips', CHS Inc.'s, ExxonMobil's, and MSCC's 1998 exhibits, respectively, and this section.