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MONTEREY BAY UNIFIED AIR POLLUTION CONTROL DISTRICT
RULE 403 - PARTICULATE MATTER
(Adopted 9-1-1974; Revised 12-13-1984, 3-22-2000, and 2-16-2005.)
CONTENTS
PART 1 GENERAL
1.1
Purpose
1.2
Applicability
1.3
Exemptions
1.4
Effective Date
1.5
Related District Rules
PART 2 DEFINITIONS
PART 3 REQUIREMENTS AND STANDARDS
3.1
Concentration
3.2
Process Weight
3.3
Individual Particles
PART 1 GENERAL
1.1
Purpose
The purpose of this Rule is to provide particulate matter emission limits for sources
operating within the Monterey Bay Unified Air Pollution Control District (Air District).
1.2
Applicability
The provisions of this Rule shall apply to any source discharging particulate matter
while operating within the Air District.
1.3
Exemptions
Rule 403 does not apply to:
1.3.1 Stationary internal combustion engines.
1.3.2 Fires set by or permitted by a public officer if such fire is set or permission given in the
performance of the official duty of such officer, and such fire in the opinion of such
officer is necessary:
1.3.2.1 for the purpose of the prevention of a fire hazard which cannot be abated by other
means, or

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1.3.2.2 the instruction of public employees in methods of fighting fires.
1.3.3 Fires set pursuant to a permit on property used for industrial purposes for the purpose of
instruction of employees in methods of fighting fire, or
1.3.4 The use of an orchard, field crop, or citrus grove heater which does not produce
unconsumed solid carbonaceous material at a rate in excess of that allowed by State law,
which is 1 gram per minute of unconsumed solid carbonaceous material. {California
Health and Safety Code (HSC) Sections 41860 and 41704 (f)}
1.4
Effective Date
This Rule, as most recently revised, is effective on February 16, 2005.
1.5
Related District Rules
Related District Rules include: 207 (Review of New or Modified Sources), 400 (Visible
Emissions), 423 (New Source Performance Standards), 424 (National Emission
Standards for Hazardous Air Pollutants); and Regulation V (Orchard, Field Crop, or
Citrus Grove Heaters).
PART 2 DEFINITIONS
Reserved.
PART 3 REQUIREMENTS AND STANDARDS
3.1
Concentration
A person shall not discharge from any source whatsoever particulate matter in excess of
0.15 grain per standard dry cubic foot of exhaust gas.
3.2
Process Weight
A person shall not discharge in any one hour from any source whatsoever particulate matter
in excess of the amount shown in Table I.

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Table I
ALLOWABLE RATE OF EMISSION BASED ON PROCESS RATE
1
Process Rate (lbs/hr)
Weight Rate (tons/hr)
Emission Rate (lbs/hr)
100
0.05
0.551
200
0.1
0.877
400
0.2
1.4
600
0.3
1.83
800
0.4
2.22
1,000
0.5
2.58
1,500
0.75
3.38
2,000
1.0
4.1
2,500
1.25
4.76
3,000
1.5
5.38
3,500
1.75
5.96
4,000
2.0
6.52
5,000
2.5
7.58
6,000
3.0
8.56
7,000
3.5
9.49
8,000
4.0
10.4
9,000
4.5
11.2
10,000
5.0
12.0
12,000
6.0
13.6
16,000
8.0
16.5
18,000
9.0
17.9
20,000
10.0
19.2
30,000
15.0
25.2
40,000
20.0
30.5
50,000
25.0
35.4
60,000 or more
30.0
40.0
1
Interpolation of the data in this Table shall be accomplished by the use of the equation:

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E = 4.10 P
0.67
where
E =
rate of emission in lbs/hr
P =
process weight rate in tons/hr
3.3
Individual Particles
No person shall on or after December 31, 1976, cause, let, permit, suffer or allow the
emission from any heat transfer, incinerator or metal salvage operation of particles in
sufficient number to cause damage to property, which particles are of sufficient size and
nature to be visible individually as particles on property other than that under the control
of the person responsible for the emission.
* * * * *