Code of Maine Rules › 06 - DEPARTMENT OF ENVIRONMENTAL PROTECTION › 096 - DEPARTMENT OF ENVIRONMENTAL PROTECTION - GENERAL › Chapter 126 - CAPTURE EFFICIENCY TEST PROCEDURES › Section 096-126-4 - Specific Requirements

Current through 2024-29, July 17, 2024
A. The capture
				efficiency of a process line shall be measured using one of the four protocols
				given in Section 4(C).
During any capture efficiency test, the average face velocity
				  of each emissions collection point ducted to the control device shall be
				  measured and recorded. In addition, the distance between each collection point
				  ducted to the control device and the emission source shall be measured and
				  recorded. Measurements of average face velocity shall be done by determining
				  average volumetric flow rate using Reference Method 2, 2A or 2C of 40 CFR Part
				  60, Appendix A and dividing by the total area of the face of the collection
				  point.
B. Any error margin
				associated with a test protocol may not be incorporated into the results of a
				capture efficiency test.
C. Any
				affected source must use one of the following four capture protocols to measure
				capture efficiency:
(1) Gas/gas method using
				TTE. The EPA specifications to determine whether a temporary enclosure is
				considered a TTE are described in Procedure T. The capture efficiency equation
				to be used for this protocol is:
CE = Gw/(Gw + Fw)
where:CE =capture efficiency, decimal fraction
Gw =mass of VOC captured and delivered to control device
				  using a TTE.
Fw =mass of fugitive VOC that escapes from a TTE
Procedure F.1 is used to obtain Fw. Procedure G.2 is used to
				  obtain Gw. In this case, a single flame ionization analyzer (FIA) at the same
				  span setting can often be used simultaneously for both Procedure F.1 and G.2.
				  If such use of a single FIA is not feasible, for example due to concentration
				  differences, Procedure G.1 may be used for determination of
				  GW with the approval of the Department.
(2) Liquid/gas method using TTE.
				The EPA specifications to determine whether a temporary enclosure is considered
				a TTE are given in Procedure T. The capture efficiency equation to be used for
				this protocol is:
CE = (L - F)/L
where:CE =capture efficiency, decimal fraction
L =mass of liquid VOC input to process
F =mass of fugitive VOC that escapes from a TTE
Procedure L is used to obtain L. Procedure F.1 is used to
				  obtain F.
(3) Gas/gas
				method using the building or room (BE) in which the affected source is located
				as the enclosure and in which both the mass of VOC captured and delivered to
				the control device and the mass of fugitive VOC that escapes the TTE are
				measured while operating only the affected facility. All fans and blowers in
				the building or room must be operated as they would under normal production.
				The capture efficiency equation to be used for this protocol is:
CE = G/(G + FB)
where: CE =capture efficiency, decimal fraction
G =mass of VOC captured and delivered to a control
				  device
FB =mass of fugitive VOC that escapes
				  from building enclosure.
Procedure F.2 is used to obtain 
				  FB. Procedure G.2 is used to obtain G.
				  In this case, a single flame ionization analyzer (FIA) at the same span setting
				  can often be used simultaneously for both Procedure F.2 and G.2. If such use of
				  a single FIA is not feasible, for example due to concentration differences,
				  Procedure G.1 may be used for determination of G with the approval of the
				  Department.
(4) Liquid/gas
				method using the building or room (BE) in which the affected source is located
				as the enclosure and in which the mass of liquid VOC input to process and the
				mass of fugitive VOC that escapes from a building enclosure are measured while
				operating only the affected facility. All fans and blowers in the building or
				room must be operated as they would under normal production. The capture
				efficiency equation to be used for this protocol is:
CE = (L - FB)/L
where: CE =capture efficiency, decimal fraction
L =mass of liquid VOC input to process
FB =mass of fugitive VOC that
				  escapes from building enclosure.
Procedure L is used to obtain L. Procedure F.2 is used to
				  obtain FB.