Imperial County Air Pollution Control District Rule 400. 4

RULE 400. 4 EMISSIONS OF OXIDES OF NITROGEN FROM WALLBOARD KILNS (Adopted 10/22/ 201 3 )

A. A pplicability

A.1 This R ule limits emissions of oxides of nitrogen (NOx) from Kilns operated

at wallboard production facilities

.

A.2 This R ule shall apply to any new or existing Kiln ( s ) with a heat input rating of 5 million British Thermal Units (Btu) per hour or more, unless exempt pursuant to Section D of this R ule.

A.3 Kilns that are sub ject to the provisions of this R ule shall not be subject to

Rule 400.

B. D efinitions

Terms applicable to this Rule and not found within this Rule are defined in Rule

101

- Definitions

B.1 WA L LBOARD KILN: is a device for drying in the manufacturing process of

gypsum wallboard.

C. R equirements

C.1 Wallboard Kilns shall not emit NOx in excess of the following:

C.1.a 30 parts per million by volume (ppmv) or 0.036 pounds per million

Btu of heat input when operated on gaseous fuels.

C.1.b 40 ppmv or 0.052 pounds per million B tu of heat input when operated on liquid fuels.

C.1.c The heat

- input weighted average of the limits specified in C.1.a and C.1.b, when operated in combination of gas and liquid fuels.

Where: G = annual heat input from gaseous fuel

L = annual heat input from liquid fuel

C.2 All ppmv emission limits are referenced at dry stack

- gas conditions and 3.0% by volume stack

- gas oxygen as an hourly average. Weighted Average Limit = (NOx limit for gaseous fuel x G) + (NOx limit for liquid fuel x L)

G + L

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D. E xemptions

The provisions of this R ule shall not apply to the following:

D.1 The emission limits in Sections C.1 and C.2 shall not apply during Startup and Shutdown provided the operator complies with the requirements specified below:

D.1.a The duration of each start

- up shall not exceed two hours.

D.1.b The duration of each shutdown shall not exceed 15 minutes.

D.1.c Wallboard Kilns shall not emit NOx in excess of 60 (sixty) parts per million by volume (ppmv) , 3.0% by volume stack

- gas oxygen, during any Start

- up or Shut

- down episode.

D.1.d The emission control system shall be in operation and emissions shall be minimized insofar as technologically feasib le during startup

or shutdown episodes

.

D.1.e Th e Wallboard Kilns subject to this exemption shall be operated in

a manner consistent with good practice for minimizing emissions

and use best efforts regarding planning, design, and operating procedures to meet th e otherwise applicable emission limitation at

all times.

E. Monitoring and Recordkeeping Requirements

E.1 The Owner or O perator of Wallboard Kilns subject to this R ule shall maintain an operating log and shall record actual times and duration of all Startups and Shutdowns

, including the type and quantity of each fuel

used. In addition, the owner or operator’s actions during startup and shutdown periods must be documented by properly signed, contemporaneous operating logs, or other relevant ev idence.

E.2 For the purpose of a compliance determination based on CEMS data, the averaging period to calculate NOx emission concentration s shall be one

clock hour.

F. Test Methods

F.1 Compliance with the NOx emission limits in Section C shall be determined

us ing United States Environmental Protection Agency (US EPA) Method 7, 7A, 7C, 7E, California Air Resources Board (CARB) Method 100, or any other applicable U S EPA approved test method.

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G. Source Test Requirements

G.1 Any required source testing shall be performed at no less than 80% of the power rating. If an Owner or O perator demonstrates to the satisfaction of

the A PCO that the E quipment cannot operate at these conditions, then emission source testing shall be performed at the highest achievable continuous power rating.

G.2 Kilns subject to the requirements of Section C shall demonstrate compliance through emission compliance testing not less than once every 12 months. All emission rates shall be based on an hourly average. Frequency of compliance testing may be extended under the following:

G.2.a The frequency of compliance testing may be extended to not less than every 36 months for Kilns which operate less than 100 hours per a 12 month period (as demonstrated by operational logs) and

which emit less than 5 tons of NOx per a 12 month period. This period may be extended if a source can prove that the Kiln(s) has not been operated during the calendar year.

G.3 Test reports shall include the operational characteristics recommended by

the manufacturer to en sure compliance with the appl icable emission limits

of this R ule and all add

- on NOx control systems.

G.4 For the purposes of a compliance determination based on source testing,

the NOx emission concentration s shall be calculated as an average of

three test ru ns.

G.5 At least 30 days prior to the s cheduled source test date, the Owner or

O per ator of a unit subject to this R ule shall submit a source test plan to the APCO. At least seven (7) days prior to the source test, the Owner or

O perator shall notify the APCO o f the exact date and time of the source

test. A final source test result shall be submitted to the APCO within 60 days following the actual source test date.

H. Records Retention

H.1 The Owner or O perator of a Wallboard Kiln ( s ) subject to this R ule shall

maintai n all records required by this R ule for a minimum of two (2) calendar years. Title V facilities shall maintain these records for five (5) calendar years. These records shall be maintained on the premises and made available to the District upon req uest.

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