RULE 2020	 EXEMPTIONS (Adopted September 19, 1991, Amended July 16, 1992, 

Amended December 17, 1992, Amended October 21, 1993, Amended July 21, 

1994, Amended September 17, 1998) 

1.0	 Purpose 

This rule specifies emissions units that are not required to obtain an Authority to 

Construct or Permit to Operate. This rule also specifies the recordkeeping requirements 

to verify the exemption and outlines the compliance schedule for emissions units that lose 

the exemption after installation. 

2.0	 Applicability 

This rule shall apply to any source operation that emits or may emit air contaminants. 

3.0	 Definitions 

3.1	 Clean Produced Water: as dermed in Rule 1020. 

3.2	 Emissions Unit: as dermed in Rule 2201. an identifiable process, operlRion, or 

piece of process equipment sHch as a source operatioH:, which efIlits or may emit, 

or resulEs iR the efIlissions of any aiT contami:nant diTectly or as fugitive efIlissiofl5. 

3.3	 HAP: a hazardous air pollutant listed in Section 112(b) of the federal Clean Air 

Act or the lists prepared by the California Air Resources Board pursuant to 

Section 44321 of the California Health and Safety Code that have OEHHA 

approved health risk values. 

3.4	 HAP Source: an emissions unit that is subject to an emissions limitation, a 

performance standard, work practice standard, or other requirements under an 

applicable provision of any of the following regulations: 

3.4.1	 National Emission Standards for Hazardous Air Pollutants (NESHAPS), 

Maximum Achievable Control Technology (MACT) standard, or other 

requirements promulgated pursuant to section 112 of the federal Clean Air 

Act (42 U.S. Code, 7401, et.seq). 

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3.4.2 Airborne Toxic Control Measures (ATCM) adopted by the California Air 

Resource Board in accordance with requirements of section 39658 of the 

California Health and Safety Code. 

3.4.3 A rule contained in Regulation VII (Toxic Air Pollutants) of the District 

Rules and Regulations. 

3.5 Low Emitting Unit: An emission unit with uncontrolled emissions rate of any 

single air contaminant, other than HAP, 

3.4.1 less than or equal to two pounds per day or, 

3.4.2 if greater than two pounds per day, is less than or equal to 75 pounds per 

year. 

3.6 NSPS Source: an emissions unit that is subject to an emissions limitation, 

performance standard, work practice standard, or other requirements under an 

applicable provision of 40 CPR, Part 60, New Source Performance Standards 

(NSPS). 

3.7 Portable Emissions Unit: as defined in Rule 2280. afty emissioftS unit that, by 

itself or in or Oft a piece of equipmeftt, is portable, meaniflg desigB:ed to be and 

capable of beiRg carried or FROved from ORe locatioft to aROtfler. IRdicatioftS of 

portability iRclude, but are ROt limited to, wheels, skids, carrying handles, doUy, 

trailer, platform or mouftting. An emissioft umt is ROt portable if: 

3.6.1 the emissioftS unit remai:H:s or vAll remam at a locatioft for more thaft 6 

coftSeeutive moftths. (Any emissioftS unit, such as a back up or steRd by 

unit, that replaces aft emissioftS unit at a 10catiOfl: aRd is iRteRded to 

perform the same fimctioft as the unit being replaced vAll be included in 

calculating the coftSecuti'/e time period. In that case, the cumulative time 

of both emissioftS units, iB:eluding the time bet\veeft the remo'lal of the 

original unit aoo i:H:staUatioft of the replaeemeftt unit, would be couftted 

towards the coftSecuti"l'e resideftCe time period.); or 

3 .6.2 the emissioftS unit remai:H:s or 'NiH remain at a locatioft for less theft 6 

coftSecuti'f'e moB:tb:s 'Nhere such a period represeftts the full leRgth of 

ROrmal afll1ual source operatioftS at the stationary source that resides at R 

fixed locatioft for more thaft 6 consecutive moftths such as a seasoool 

source; or 

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3.6.3	 the emissions Hait is remo¥ed from one locatioa for a f3eriod aOO thea 

returned to the Stlfl'le locatio a in an attempt to circllllWeat the portl:tble 

eqHipmeat residenee time reqHiremeat. 

The period d1:lrmg whicH the emissions 1:lait is maintained at a storage facility sHall 

be excl1:lded from detefllli.ffing the abo¥e resideacy reqHiremefltS. 

3.8	 Reconstructed Stationary Source: a Reconstructed Stationary Source as dermed in 

Rule 2201, or a Reconstruction as dermed in 40 CFR Part 60 Subpart A. 

3.9	 Roadmix: a mixture of tankbottoms from crude oil storage tanks, material from 

crude oil spills , or other crude-oil-eontaining soil mixed with aggregates and 

soils, that is used as a base or cover material for roads, parking lots, benns, tank 

and well locations, or similar applications. 

3.10	 Routine Replacement: as dermed in Rule 2201. 

3.11	 Stationary Source: as dermed in Rule 2201. 

3.12	 Unloading Rack: any aggregate or combination of equipment or control 

equwmentthat unloads organic liquid from a storage WIi\k into tank trucks, 

trailers. or railroad tank cars. The unloading rack is the portion of the connection 

system from the connection at the inlet of the organic liquid pump to and including 

the hose and connector at the delivery tank. 

4.0	 Precluded Source Categories EmissioflS Uaits P'tot ReqHiriflg l .... ',llrittea Pennit 

4.1	 No Authority to Construct or Permit to Operate shall be required for the following 

source categories that are specifically precluded from District permitting 

requirements by state or federal law: 

4.1.2	 Any equipment used in agricultural operations in the growing of crops or 

the raising of fowl or animals, except that located in the area that is, in 

whole or in part, south of the Sixth Standard Parallel South, Mount Diablo 

Base and Meridian, may be required to obtain permits for the operation of 

orchard and citrus grove heaters. In no event shall an owner be denied a 

permit for such heaters if the heaters produce unconsumed solid 

carbonaceous matter at the rate of one gram per minute or less (Health and 

Safety Code, Section 4231O(e)). 

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\ 

4.1.3	 Any structure designed for and used exclusively as a dwelling for not more 

than four families and any incinerator used exclusively in connection with 

such structure (Health and Safety Code Section 4231O(b) and (c)). 

4.1.4	 Barbecue equipment that is not used for commercial purposes, <Health and 

Safety Code Section 4231O(d)). 

4.1.5	 Motor vehicles as dermed by the Vehicle Code of the State of California 

(Health and Safety Code, Section 4231O(a)), but not including any 

emissions unit mounted on such vehicle, that would otherwise require a 

permit under the provisions of the District Rules and Regulations. 

4.1.6	 Locomotives. aiJ::planes. and watercraft used to transport passengers or 

freight. This exemption is not intended to apply to equipment used for the 

dredging of waterways or to equipment used in pile driving adjacent to or 

in waterways. 

4.1	 An :Authority to COfl5tnlct or Perrn:i:t to Operate shall not be required for an)' 

emissions unit, listed in Section 5.0, ulliess: 

4.1.1	 The emissions unit is subject to BPi'. 40 CPR, Part 60, ~tew Source 

Perfofffiflnce Standards O'l"SPS), or BPA 40 CPR, Part 61, ~tational

Emission Standards for Hazardous Air Polffitants (NESHAPS); 

4.1.2	 The APCG makes a deteI'Il'l:ifHition that a permit shall be required because 

the emissions unit may not operate in compliance with all District rules 

and regulations; 

4.1.3	 The O'tvner!operator specifically requests a ",,,ritten permit be issued; Of 

4.1.4	 The emissions unit is proposed in the control of emissions from a soil or 

ground'Nater deeontamination project. 

4.2	 An Authority to Constnlct or Perrn:i:t to Operate shall not be required for the 

following: 

4.2.1	 Any emissiofl5 unit, not specificall)' listed in: Section 5.0, if the 

uncontrolled emissions of any air contaminant does not exceed two (2) 

pounds in any 24 hour period; 

4.2.2	 An)' equipment used in agricultural operations in the growing of crops Of 

the raising of fowl or animals, except that located in the area v/hich is, in 

whole or in part, south of the SuM Standard Parallel South, Mount Diablo 

Base and Meridian, may be required to obtaii'!: permits for the operation of 

orchard and citrus grot,'e heaters. In no event shall an operator be denied a 

pennit for such heaters if the heaters produce unconsumed solid 

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ellfBoflRceoHs matter at the rate of one (1) gram per minute or less (He9:lth 

aOO Safety Code, SectioR 42310(e)); 

4.2.3 Any strecMe designed for andHsed eJ£clHsively as a dwelling for oot morc 

thaft foHr (4) families aRd !HlY inciHerator used eJ£clusively ifl eonnectioft 

with sHeh stRiCRIre (Health !Hid Safety Code SeetioR 42310(8) and (c)); 

4.2.4 BaraeeHe eqaif)meRt which is flOt used for cOfIHllercial purposes, (Health 

ftfld Safety Coas SeotioR 42310(a)); 

4.2.5 Motor vehicles as defined By ilie Vehicle Code of the State of California 

(Health and Safety Code, SeetioR 4231O(a)), BHt flOt if1€ffiding afl)' 

emissioftS HIlit fHOHfited OR such 'femcle, that "'lOHld otherwise reqHire a 

permit HOOer the provisioftS of the District RHles aOO Regulations; or 

4.2.6 Repairs or maIDteflaflCe flOt involving stFHemr9:l chaRges to aftY emissions 

umt for 'h'ftieh a permit has BeeR graflted (Healtll!Hid Safe£)' Code, SeetioR 

4231O(t)). 

4.2 Record1Eeeping shaH Be reElliirsa to verify or Hlftintainfifty eJ£emptioRfor 'lfftich 

fue eJ£emptioR is Basea OR a maxllnam aail)' limitatioR. 

5 .0 ExemptioR List Sigmficaflt Categories 

Too folImving source 0fleratioflS shall Be eJ£eHiflt from OBtaining aR .Authority to Construct 

or a Permit to Qperate: 

5.1 ComBustioR aOO Heat TraI15fer Systems 

5.1.1 Steam generators, steam sUflerherHers, water boilers, water heaters, stcem 

eleaflCrs, aOO closea indirect heat transfer systems '''''meh ha're a maximum 

input heat rating of 5,000,000 BTU fler hour (gross) or less fiftd is 

equiflflcd to be rrred eJ£clusively with natural gas, liquefiea flctroleum gas, 

or lift)' eomBinatioR thereof provided the fuel eofltain5 RO more tflaR fiTle 

(5) percent B)' 'Neight hydrocaraoflS heaYier thaR butane (as determinea By 

test method ASTM E 260 73) aOO RO more thaR 0.75 grains of total sHlfur 

fler 100 staRdard cubic feet of gas (as determined by test £Rethod ASTM D 

1072 80). 

5.1.2 PistOR type iffiefflRl combHstioR eagines vlith a manufacturer's maximum 

cofltiffiiOUS rating of 50 BrakiHg horsepo\','er (bhfl) or lcss. 

5.1.3 Gas mrbiHe eagiHes ","ith a maRi:fl'l:um heat influt rating of 3,000,000 BTU 

per hour or less at ISO StaRdard Da-y ConditioI15. 

5.1.4 EquipmeRt used eJ£c!usivel)' for sflace heating, other thaR Boilers. 

5.2 Vehicles 

Locomotives, ai:qJlanes, and watercraft Hsed to traI15port passeRgers or freight. 

This e)wmptioR is ROt inteHded to apply to equipmeftt used fer the dreaging of 

waterwli)'s or to equipmeftt used in pile driving adjaceHt to or in v/aterways. 

5.3 Cooling Tovrers 

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