i = Individual volatile organic compound.
The mole fraction, Xi, is determined as follows:
Xi = moles of "i" in liquid mixture total moles of liquid mixture
The total moles of liquid mixture shall include both the moles of volatile organic compounds
and volatile inorganic compounds (such as water) in the liquid mixture.
(4) Notwithstanding the provisions of subrule (2)(a) of this rule, a person shall not be
required to reduce the temperature of a gas stream below the freezing point of a condensable
component in that gas stream if it can be demonstrated, using intrinsic chemical data, to the
satisfaction of the department, that in doing so, the condenser would be rendered ineffective. In
this case, the temperature of the gas stream shall be reduced as low as can be achieved without
freezing of the condenser occurring.
(5) The provisions of this rule do not apply to any single existing reactor, distillation
operation, crystallizer, centrifuge, or vacuum dryer that has a maximum uncontrolled volatile
organic compound emission rate of less than 15 pounds per day.
(6) A person shall not operate an existing air dryer or production equipment exhaust system
unless the volatile organic compound emissions from this equipment are reduced by not less than
90% if the uncontrolled volatile organic compound emissions are 330 pounds per day or more or
are reduced to less than or equal to 33 pounds per day if the uncontrolled volatile organic
compound emissions are less than 330 pounds per day.
(7) A person shall not load or allow the loading of a volatile organic compound that has a
vapor pressure of more than 210 millimeters of mercury (4.1 pounds per square inch), as
measured at 20 degrees Celsius (68 degrees Fahrenheit), from a truck or railcar into an existing
stationary vessel of more than a 2,000-gallon capacity, unless a vapor balance system or an
alternate control system that provides not less than 90% control of loading emissions is utilized.
(8) A person shall not store a volatile organic compound that has a vapor pressure of more
than 75 millimeters of mercury (1.5 pounds per square inch), as measured at 20 degrees Celsius
(68 degrees Fahrenheit), in an existing aboveground stationary vessel, unless the stationary
vessel is equipped with a pressure/vacuum conservation vent set at plus or minus 1.5 millimeters
of mercury (0.03 pounds per square inch) or an alternate control system at least as effective. For
purposes of comparing the actual emission level from an alternative control technology to the
allowable emission level resulting from the use of a pressure/vacuum conservation vent meeting
this requirement, the actual emission level shall be determined using the methods described in
40 C.F.R. Part 60, Appendix A, and the allowable emission level shall be determined using the
calculation methods described in appendix B of "Control of Volatile Organic Emissions From
Manufacture of Synthesized Pharmaceutical Products," EPA-450/2-78-029, both adopted by
reference in R 336.1902.
(9) A person shall not operate an existing centrifuge, rotary vacuum filter, or other filter
that has an exposed liquid surface, where the liquid contains a volatile organic compound or
compounds and the sum of the partial pressure or pressures of volatile organic compound or
compounds is 26.2 millimeters of mercury (0.5 pounds per square inch) or more, as measured at
20 degrees Celsius (68 degrees Fahrenheit), unless the equipment is enclosed.
(10) A person shall not operate an existing in-process tank that may contain a volatile
organic compound at any time, unless the tank is equipped with a cover and the cover remains