The owner or operator of each batch process operation in the Beaumont/Port
Arthur and Houston/Galveston areas shall determine the mass emissions and
flow rates as follows.
(1) Determination of Uncontrolled Annual Emission Total. The
owner or operator shall determine the annual mass emissions total by using
engineering estimates of the uncontrolled emissions from a process vent or
group of process vents within a batch process train and multiplying by the
potential or permitted number of batch cycles per year. Engineering estimates
must follow the guidance contained in EPA's Control
of Volatile Organic Compound Emissions from Batch Processes - Alternative
Control Techniques Information Document (EPA-453/R-94-020, February
1994). Alternatively, if an emissions measurement is used to measure vent
emissions, the measurement must conform with the requirements of measuring
incoming mass flow rate of volatile organic compounds as specified in §115.165
of this title (relating to Approved Test Methods and Testing Requirements).
(2) Determination of Average Flow Rate. To obtain a value for
average flow rate, the owner or operator may choose to measure the flow rates
or to estimate the flow rates using the estimation methods contained in EPA's Control of Volatile Organic Compound Emissions from Batch
Processes - Alternative Control Techniques Information Document (EPA-453/R-94-020,
February 1994). For existing manifolds, the average flow rate may be the flow
rate that was assumed in the design.