2
If some of the organic compounds in the stream are not classified as VOCs total VOCs
emission can be calculated with the following formula:
E
VOC
= E
TOC
× (WP
VOC
/ WP
TOC
)
Where:
E
VOC
= the VOC mass emissions from the equipment (kg/hr)
E
TOC
= the TOC mass emissions from the equipment (kg/hr)
WP
VOC
= the VOC concentration in the equipment in weight percent
WP
TOC
= the TOC concentration in the equipment in weight percent
If, for a stream, estimating emissions of a specific VOC in the mixture is necessary, the
following formula can be used:
E
X
= E
TOC
× (WP
X
/ WP
TOC
)
Where:
E
X
= the organic chemical “X” mass emissions from the equipment (kg/hr)
E
TOC
= the TOC mass emissions from the equipment (kg/hr)
WP
X
= the organic chemical “X” concentration in the equipment in weight percent
WP
TOC
= the TOC concentration in the equipment in weight percent
Three other methods emitted from the
protocol for equipment leak emission estimates are
available. However these methods necessitate on-site monitoring so they are not included into
the scope of this study.
1.2. Implementation of a Leak Detection and Repair (LDAR) program
Still according to EPA, the implementation of an LDAR program could lead to a reduction by
63% of emissions from equipment leaks. The following describes the procedure to implement
this program.
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