VENAPCD RULE 74.15 BOILERS, STEAM GENER. & PROCESS HEATERS

LAST REVISED 12/03/91

Rule 74.15. Boilers, Steam Generators and Process

Heaters (Adopted 3/28/89, Revised 12/3/91)

A. Applicability

1. The provisions of this rule shall apply to boilers,

steam generators and process heaters used in all

industrial, institutional and commercial operations,

except as follows:

a. Utility electric power generating units and any

auxiliary boiler used with a utility electric

power generating unit.

b. Water heaters.

B. Requirements

1. No person shall allow the discharge into the

atmosphere from any boiler, steam generator or process

heater with a rated heat input capacity of equal to, or

greater than, five (5) million BTU's per hour, and an

annual heat input rate of equal to, or greater than, 9

x 109 BTU's per calendar year, oxides of nitrogen

emissions in excess of 40 parts per million volume.

Carbon monoxide emissions from units subject to this

rule shall not exceed 400 ppmv.

Units subject to the above provisions shall test for

compliance not less than once every 24 months.

2. Any boiler, steam generator or process heater with a

rated heat input capacity of equal to, or greater than,

five (5) million BTU's per hour, and having an annual

heat input rate of less than 9 x 109 BTU's per calendar

year, shall comply with one of the following

requirements:

a. The unit shall be operated in a manner that

maintains stack gas oxygen concentrations at less

than or equal to three (3) percent on a dry basis

for any 15-consecutive-minute averaging period.

Units subject to this provision shall test for

compliance every six (6) months; or

b. The unit shall be operated using a stack gas

oxygen trim system set at three (3) percent

oxygen. The tolerance of the setting shall be ±

five (5) percent. Units subject to this provision

shall test for compliance every twelve (12)

months; or

c. The unit shall be tuned at least twice per

calendar year, at six-month intervals in any

twelve month period in accordance with the

procedure described in Attachment 1; or

d. The unit shall comply with the emission and

testing requirements of Subsection B.1.

C. Exemptions

1. The provisions of this rule shall not apply to any

boiler, steam generator or process heater with a rated

heat input capacity of less than five (5) million BTU's

per hour.

2. The provisions of Subsection B.1 of this rule shall

not apply to any boiler, steam generator or process

heater operated on alternate fuel under the following

conditions:

a. Alternate fuel use is required due to the

curtailment of natural gas service to the

individual unit by the natural gas supplier.

Alternate fuel use in this case shall not exceed

the period of natural gas curtailment.

b. Alternate fuel use is required to maintain the

alternate fuel system. Alternate fuel use in this

case shall not exceed 50 hours per year.

The tune-up requirements specified in Section B.2.c

shall not be required for alternate fuel use.

3. The provisions of Subsection B.1 of this rule shall

not apply to the use of an emergency standby unit when

a breakdown occurs to the primary unit, and the

breakdown is reported pursuant to the breakdown

reporting requirements of Rule 32. Emissions resulting

from the operation of the standby unit shall not exceed

the total annual or hourly permitted emission rate of

the primary unit. Operation of the standby unit shall

not occur beyond the period of the primary unit's

emergency breakdown.

D. Recordkeeping Requirements

1. Any person subject to the provisions of Subsection

B.2 of this rule shall install a totalizing fuel meter

for each applicable unit and for each fuel. The meter

shall be used to demonstrate that each unit operates at

or below the applicable heat input level.

Meters shall be accurate to ± one (1) percent, as

certified by the manufacturer in writing. Totalizing

fuel meter readings shall be recorded at the end of

each operating day in units of either cubic feet per

day or gallons per day. At the end of each month,

daily records shall be compiled into a monthly report.

Both monthly reports and daily records shall be

maintained for a period of four (4) years and shall be

made available for inspection by the Air Pollution

Control Officer upon request.

2. Any person subject to the provisions of Subsection

B.2.c of this rule shall submit a report to the

District twelve (12) months after achieving compliance

with Subsection B.2.c. Reports shall continue to be

submitted every twelve (12) months. This report shall

verify that each tune-up has been performed and that

the results were satisfactory. The report shall

contain all information or documentation that the Air

Pollution Control Officer may determine, in writing, to

be necessary.

3. Any person utilizing alternate fuel, pursuant to the

provisions of Subsection C.2 of this rule, shall

maintain permanent daily records of each occurrence.

Each record shall include the type of fuel, the

quantity of fuel, and the duration of the occurrence.

Records shall be maintained for a period of four (4)

years and shall be available for inspection by the Air

Pollution Control Officer upon request.

E. Test Methods

1. Compliance with the emission requirements in Section

B shall be determined using the following test methods:

a. Oxides of Nitrogen - ARB Method 100

b. Carbon Monoxide - ARB Method 100

c. Stack Gas Oxygen - ARB Method 100

2. Emission tests resulting in compliance determinations

for the requirements of Subsection B.1 shall be

conducted on units in "as-found" operating condition.

However, no emission test for this rule shall be

conducted during start-up, shutdown or under breakdown

conditions.

3. The NOx parts per million emission limitation

specified in Subsection B.1 is expressed as nitrogen

dioxide. The limitations for both NOx and CO are

referenced at three (3) percent volume stack gas oxygen

on a dry basis averaged over 15 consecutive minutes.

F. Violations

1. Failure to comply with any provision of this rule

shall constitute a violation of this rule.

2. Any unit subject to the provisions of Subsection B.2

shall comply with the provisions of Subsection B.1 if

the unit operates during any twelve (12) month period

at a total annual heat input rate greater than the

applicable annual heat input rate specified in

Subsection B.2.

G. Definitions

1. "Boiler, Steam Generator": Any external combustion

equipment fired with liquid and/or gaseous fuel and

used to produce steam. These terms do not include any

unfired waste heat recovery boiler that is used to

recover sensible heat from the exhaust of any

combustion equipment.

2. "Process Heater": Any external combustion equipment

fired with liquid and/or gaseous fuel and which

transfers heat from combustion gases to water or

process streams. Process Heater does not include any

kiln or oven used for drying, baking, cooking,

calcinating or vitrifying or any fuel-fired degreasing

or metal finishing equipment.

3. "Rated Heat Input Capacity": The heat input capacity

specified on the nameplate of the unit's burner. If

the burner has been permanently altered or modified

such that the maximum heat input is different than the

input capacity specified on the nameplate, and this

alteration or modification has been approved in writing

by the Air Pollution Control Officer, then the new

maximum heat input shall be considered as the rated

heat input capacity.

4. "Unit": Any boiler, steam generator or process heater

as defined in Subsections G.1 and G.2 of this rule.

5. "Water Heater": A device that heats water to a

thermostatically-controlled temperature of no more than

210 degrees Fahrenheit for delivery on demand.

H. Increments of Progress

1. For units subject to Subsection B.1 and with a rated

heat input capacity of equal to or greater than ten

(10) million BTU's per hour, complete Authority to

Construct applications shall be submitted to the APCD

before March 1, 1990, and final compliance shall be

demonstrated before September 1, 1991.

2. For units subject to Subsection B.1 and with a rated

heat input capacity of equal to or greater than five

(5) million BTU's per hour, but less than ten (10)

million BTU's per hour, complete Authority to Construct

applications shall be submitted to the APCD before

March 1, 1991, and final compliance shall be

demonstrated before March 1, 1992.

3. For units subject to Subsections B.2, final

compliance shall be demonstrated by March 1, 1990.