N.H. Admin. Code § Env-A 808.01

Current through Register No. 50, December 12, 2024

Section Env-A 808.01 - Definitions

For the purposes of this part, the following definitions shall apply:

(a) "Calendar hour" means any 60-minute period commencing on the hour;

(b) "Facility operating hour" means, for purposes of calculating data availability pursuant to Env-A 808.12, a minimum of 42 minutes of facility operation during a calendar hour;

(c) "Facility operation" means one of the following:

(1) For a device which combusts fuel to generate electricity, steam, or heat, "or to incinerate municipal solid waste, that is required by this part to have a continuous emission monitoring (CEM) system installed, a time period during which any fuel is being combusted in the device; or

(2) For any other facility that is required by this part to have a CEM system installed, a time period during which any material is being processed which contributes to the emissions monitored by the CEM system;

(d) "Gaseous excess emission" means any measurement made by a gaseous CEM system as defined in (e), below, which exceeds the emission limit specified in any state or federal standard or specified in any permit issued by the department, based on the averaging time specified in the standard;

(e) "Gaseous CEM system" means a CEM system that measures concentrations of gaseous chemical compounds including, but not limited to, ammonia (NH3), carbon monoxide (CO), sulfur dioxide (SO₂), nitrogen oxides (NOx,), total reduced sulfur (TRS), hydrogen chloride (HCl), hydrogen fluoride (HF), mercury (Hg), volatile organic compounds (VOC), and diluent gas, such as oxygen (O₂) or carbon dioxide (CO₂), and includes the following:

(1) All the components necessary to:

a. Extract the gas from a stack, vent, or duct;

b. Dilute the sample, where a dilution extractive probe design is being used;

c. Transport the sample to the analyzer; and

d. Filter or de-water the sample, as applicable by the design of the system;

(2) An analyzer, or analyzers, that can be calibrated with zero gas and higher concentration gas standards in order to measure the concentration of a gaseous chemical compound;

(3) The system of valves, gauges, and flow controllers used to control the flow of dilution air, maintain the sampling rate, and introduce calibration and audit gas to the system;

(4) If the source is subject to a mass emission rate standard, a stack volumetric flow rate or fuel flow rate monitoring system;

(5) The computerized data acquisition system that calculates, averages, and stores the emissions data;

(6) Where allowed or required as a monitoring method, sorbent tube monitoring systems; and

(7) Other gas concentration measurement methods or technologies with an applicable Performance Specification in 40 CFR 60, Appendix B;

(f) "Opacity excess emission" means any consecutive 6-minute or 60-minute period, or aggregate 60-minute period of opacity measurement, averaged in accordance with Env-A 808.03 (b), which exceeds any standards for visible emissions specified in Env-A 1900 through Env-A 2900, excluding any exempted periods specified in Env-A 2000;

(g) "Out of control period" means a period of time during which the emissions data being collected by the CEM system is considered to be invalid, which includes, but is not limited to, the following:

(1) For a gaseous CEM system:

a. The time period beginning with the completion of the daily calibration drift check where the calibration drift (CD), as calculated pursuant to 40 CFR 60.13(d)(1), has exceeded twice the allowable limit for 5 consecutive days and ending with the CD check following corrective action that results in the CD being within the allowable CD limit;

b. The time period beginning with the completion of a daily CD check preceding the daily CD check that results in the CD being greater than 4 times the allowable limit and ending with the CD check following corrective action that results in the CD being within the allowable CD limit;

c. The time period beginning with the completion of a relative accuracy test audit (RATA), cylinder gas audit (CGA), or relative accuracy audit (RAA) as defined in 40 CFR 60, Appendix F, where the CEM system fails the accuracy criteria established for the respective audit and ending with successful completion of the same audit where the CEM system meets the accuracy criteria established after corrective action has occurred; or

d. Any periods of CEM system operation deemed out-of-control by a federal regulation requiring the installation, operation, and quality assurance of a CEM system, including but not limited to 40 CFR 75 and 40 CFR 63 Subpart UUUUU; and

(2) For an opacity CEM system:

a. The time period beginning with the completion of the daily calibration drift check where the CD, as calculated pursuant to 40 CFR 60.13(d)(1), exceeds 2% opacity for 5 consecutive days, and ending with the CD check after corrective action has occurred that results in the performance specification drift limits being met;

b. The time period beginning with the completion of a daily CD check preceding the daily CD check that results in the CD being greater than 5% opacity and ending with the CD check after corrective action has occurred that results in the performance specification drift limits being met;

c. The time period beginning with the completion of a quarterly opacity audit where the CEM system fails any of the audits required by Env-A 808.11 and ending with successful completion of the same audit after corrective action has occurred; or

d. The time period beginning with the completion of the zero alignment check required by 40 CFR 60, Appendix F, Procedure 3, section 10.3 where the zero alignment error exceeds 2 percent opacity and ending after corrective action is taken that results in a successful zero alignment check.

(h) "Rolling average" means an arithmetic mean specified by an applicable emission limit and calculated, as follows:

(1) In pounds of pollutant per hour, the sum of the valid hourly values for pounds of the pollutant emitted as determined by the CEM system during the successive facility operating day period, divided by the number of valid hours in the successive facility operating day period, with a new rolling average calculated at the end of each subsequent facility operating day;

(2) In pounds of pollutant per million British thermal units (MMBtu), the sum of the valid hourly values for pounds of the pollutant emitted as determined by the CEM system during the successive facility operating day period, divided by the total MMBtu of heat input of fuel combusted by the device during the valid hours in the successive facility operating day period, with a new rolling average calculated at the end of each subsequent facility operating day;

(3) For purposes of determining a short-term, pound per hour equivalent to a tons per year limit, the sum of all valid hours of emissions in pounds per hour in any consecutive 365-day period divided by 8,760 calendar hours, with a new 365-day rolling average calculated at the end of each subsequent day; or

(4) In accordance with any rolling average established in a permit issued prior to the 2019 effective date of this chapter

(i) "Valid hour" means a minimum of 42 minutes of gaseous or opacity CEM system emissions readings taken in any calendar hour, during which time the CEM is not in an out of control period as defined in Env-A 808.01(h), and the facility on which the CEM is installed is in operation.

N.H. Admin. Code § Env-A 808.01

(See Revision Note at chapter heading for Env-A 800) #5505 eff 11-15-92; renumbered by #6057-B (formerly Env-A 807), 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.