Section Env-A 805.02 - DefinitionsFor the purposes of this part, the following definitions shall apply:
(a) "Average face velocity" means the velocity at an emissions collection point as calculated by dividing the average volumetric flow rate by the total of the face of the collection;(b) "Building enclosure (BE)" means a structure that:(1) Contains a VOC-emitting process; and(2) Meets the specifications given in 40 CFR 51, Appendix M, Method 204;(c) "Capture" means the containment or recovery of emissions from a process for direction into an exhaust duct which leads to a stack or a control device;(d) "Capture efficiency (CE)" means the weight per unit of time of VOC entering a capture system and delivered to a control device divided by the weight per unit time of total VOC emitted by an emission source of VOC expressed as a percentage;(e) "Capture system" means any other equipment that contains, collects or transports an air pollutant to a control device, such as hoods, ducts, fans, booths, ovens, and dryers;(f) "Control device" means equipment used to reduce, by destruction or removal, the amount of air pollutant(s) in an air stream prior to discharge into the ambient air, such as an incinerator or carbon adsorber;(g) "Control system" means a combination of one or more capture system(s) and control device(s);(h) "Destruction or removal efficiency" means the efficiency, expressed as a percentage, of a control device in destroying or removing contaminants calculated as one minus the ratio of the amount of VOC exiting the control device to the amount of VOC entering the control device;(i) "Gas/gas method" means a method for determining capture efficiency which relies only on gas phase measurements, either by: (1) Construction of a temporary total enclosure (TTE) to assure all would-be fugitive emissions are measured; or(2) Use of a building or room that houses the emission source as a BE;(j) "Hood" means a partial enclosure or canopy for capturing and exhausting, by means of a draft, the organic vapors or other fumes rising from a coating process or other source;(k) "Liquid/gas method" means a method for determining capture efficiency which requires both gas phase and liquid phase measurements and analysis, either by: (1) Construction of a temporary total enclosure (TTE); or(2) Use of a building or room that houses the emission source as a BE;(l) "Method 204" means the criteria for and verification of a permanent or temporary total enclosure as specified in 40 CFR 51, Appendix M;(m) "Method 204A" means the procedure for determining the VOC content in a liquid input stream as specified in 40 CFR 51, Appendix M;(n) "Method 204B" means the procedure for determining the VOC emissions in a captured stream as specified in 40 CFR 51, Appendix M;(o) "Method 204C" means the procedure for determining the VOC emissions in a captured stream as specified in 40 CFR 51, Appendix M;(p) "Method 204D" means the procedure for determining the VOC emissions in a fugitive stream from a temporary total enclosure as specified in 40 CFR 51, Appendix M;(q) "Method 204E" means the procedure for determining the VOC emissions in a fugitive stream from a building enclosure as specified in 40 CFR 51, Appendix M;(r) "Method 204F" means the procedure for determining the VOC content in a liquid input stream, such as the distillation approach, as specified in 40 CFR 51, Appendix M;(s) "Overall control" means, for a solvent recovery system, the ratio of the total recovered solvent VOC in a control device to the sum of the liquid VOC input to all process lines venting to the control system;(t) "Overall emission reduction efficiency" means the weight per unit time of VOC removed or destroyed by a control device divided by the weight per unit time of VOC emitted by an emission source, expressed as a percentage, and is the product of the capture efficiency and the control equipment destruction or removal efficiency;(u) "Permanent total enclosure (PTE)" means a structure that:(1) Is permanently installed to completely surround a source of VOC emissions such that all emissions are captured and contained for discharge to a control device; and(2) Meets the specifications given in Method 204; and(v) "Temporary total enclosure (TTE)" means a structure that: (1) Is installed to completely surround a source of VOC emissions such that all emissions that are not directed through the control device are captured by the enclosure and contained for discharge through ducts that allow for the accurate measurement of the uncaptured VOC emissions;(2) Is installed solely for the purpose of measuring uncaptured VOC emissions;(3) Is removed after testing is completed; and(4) Meets the specifications given in Method 204.N.H. Code Admin. R. Env-A 805.02
(See Revision Note at chapter heading for Env-A 800) #5505 eff 11-15-92, EXPIRED: 11-15-98
New. #6893, INTERIM, eff 11-26-98, EXPIRED: 3-26-99
New. #7788, eff 10-31-02; ss by #9802, eff 10-31-10
Amended by Volume XXXIX Number 19, Filed May 9, 2019, Proposed by #12762, Effective 5/1/2019, Expires 5/1/2029.