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

Universal Citation: 06 ME Code Rules ยง 096-126-4

Current through 2024-38, September 18, 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.

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