SACRAMENTO METROPOLITAN AIR QUALITY MANAGEMENT DISTRICT 

RULE 496 – LARGE CONFINED ANIMAL FACILITIES 

(Adopted 08-24-06) 

INDEX

100 GENERAL

101 PURPOSE 

102 APPLICABILITY 

103 SEVERABILITY 

200 DEFINITIONS 

201 AERATED STATIC PILE

202 AEROBIC LAGOON 

203 ANAEROBIC DIGESTER 

204 ANAEROBIC LAGOON 

205 ANIMAL HOUSING 

206 ANIMAL WASTE 

207 BEST AVAILABLE RETROFIT CONTROL TECHNOLOGY 

208 CALF 

209 CAPTURE EFFICIENCY 

210 CLASS ONE MITIGATION MEASURES 

211 CLASS TWO MITIGATION MEASURES 

212 COMBINED CAPTURE AND CONTROL EFFICIENCY 

213 CONFINED ANIMAL FACILITY 

214 CONTROL EFFICIENCY 

215 CORRAL 

216 DAIRY 

217 DRY ANIMAL WASTE/DRY SEPARATED SOLIDS 

218 DRY COW 

219 EMISSION MITIGATION PLAN 

220 FEED APRON 

221 FEED BUNK 

222 FREESTALL 

223 HEIFER 

224 HIGH MOISTURE CORN 

225 IN-CORRAL MOUNDS 

226 LAGOON 

227 LAND INCORPORATE 

228 LARGE CONFINED ANIMAL FACILITY 

229 LEAK 

230 MILKING PARLOR 

231 MITIGATION MEASURE 

232 NRCS 

233 PEN 

234 PHOTOTROPIC LAGOON 

235 POULTRY 

236 SEPARATED SOLIDS 

237 SILAGE 

238 SOLID SEPARATOR SYSTEM 

239 STEAM-FLAKED CORN 

240 STORAGE POND 

241 VOC CONTROL DEVICE 

242 WEATHERPROOF COVERING/STORAGE STRUCTURE 

300 STANDARDS

301 EMISSION MITIGATION PLAN REQUIREMENTS 

302 BARCT REQUIREMENTS 

303 EMISSION MITIGATION MEASURES 
304 ALTERNATIVE EMISSION MITIGATION PLAN 

305 OPERATING AND DESIGN STANDARDS 

400 ADMINISTRATIVE REQUIREMENTS 

401 PERMIT APPLICATION 

402 IMPLEMENTATION SCHEDULE 

403 EMISSION MITIGATION PLAN UPDATE 

404 CALCULATION FOR DETERMINING PERCENT OF ANIMAL WASTE OR SEPARATED 

SOLIDS BEING SENT TO AN ANAEROBIC DIGESTER 

500 MONITORING AND RECORDS 

501 MONITORING AND RECORDKEEPING

502 TEST METHODS
100 GENERAL

101 PURPOSE: To limit volatile organic compound (VOC) emissions from large confined animal 

facilities. 

102 APPLICABILITY: The requirements of this Rule shall apply to large confined animal 

facilities, as defined in Section 228, and feed suppliers as referenced in Section 303.2(a). 

103 SEVERABILITY: If a court of competent jurisdiction issues an order that any provision of this 

rule is invalid, it is the intent of the Board of Directors of the District that other provisions of 

this rule remain in full force and affect to the extent allowed by law. 

200 DEFINITIONS: Unless otherwise defined below, the terms in this rule are defined in Rule 215, 

AGRICULTURAL PERMIT REQUIREMENTS AND NEW AGRICULTURAL PERMIT REVIEW. 

201 AERATED STATIC PILE: A system designed, constructed, maintained, and operated for 

decomposing organic material in which the material is placed on top of perforated plates or 

pipes that are connected to blowers that either push or pull air through the piles. The system 

shall operate under negative or positive pressure for not less than 90% of its blower operation 

cycle and the exhaust shall be vented to a VOC control device with an overall VOC capture 

and VOC control efficiency of at least 80%. 

202 AEROBIC LAGOON: A lagoon designed, constructed, maintained, and operated in 

accordance with the applicable standards for aerobic lagoons in the Natural Resource 

Conservation Service (NRCS) California Field Office Technical Guide Code 359 or other 

applicable standards approved by the Air Pollution Control Officer, California Air Resources 

Board, and U.S. Environmental Protection Agency. 

203 ANAEROBIC DIGESTER: A basin or tank designed, constructed, maintained, and operated 

for the anaerobic treatment of liquid or solid animal waste in accordance with the applicable 

standards for anaerobic digesters in the NRCS California Field Office Technical Guide Code 

365 or 366 or other applicable standards approved by the Air Pollution Control Officer, 

California Air Resources Board, and U.S. Environmental Protection Agency. 

204 ANAEROBIC LAGOON: A lagoon designed, constructed, maintained, and operated in 

accordance with the applicable standards for anaerobic lagoons in the NRCS California Field 

Office Technical Guide Code 359 or other applicable standards approved by the Air Pollution 

Control Officer, California Air Resources Board, and U.S. Environmental Protection Agency. 

205 ANIMAL HOUSING: Any area, except milking parlors, where animals live or allowed to roam 

including, but not limited to, freestalls, corrals, drylots, pens, loafing barns, or open lots. 

206 ANIMAL WASTE: Any animal excretions and mixtures containing animal excretions, except 

for material meeting the definition of separated solids. 

207 BEST AVAILABLE RETROFIT CONTROL TECHNOLOGY (BARCT): Best Available 

Retrofit Control Technology, as defined in Section 40406 of the California Health and Safety 

Code, is "an emission limitation that is based on the maximum degree of reduction 

achievable, taking into account environmental, energy, and economic impacts by each class 

or category of source." 

208 CALF: A cow or bull younger than six months. 

209 CAPTURE EFFICIENCY: Expressed in percent, the capture efficiency is the ratio of the 

weight of the VOC entering the control device to the weight of VOC emitted from a piece 

or pieces of equipment, both measured simultaneously. Capture efficiency is calculated 

by the following equation: 
= ×100 e

c

cap

W

W E

Where: Ecap = Capture efficiency, % 

Wc = Weight of VOC entering the control device 

 We = Weight of VOC emitted, uncontrolled, from the equipment 

210 CLASS ONE MITIGATION MEASURES: A mitigation measure or combination of measures 

for specific source category that, at the time of rule adoption, are considered to be BARCT for 

VOC. 

211 CLASS TWO MITIGATION MEASURES: A mitigation measure or combination of measures 

for the specific source category that achieve VOC reductions equal to or greater than those 

achieved by Class One Mitigation Measures, but are considered beyond the BARCT 

standards for existing facilities after taking into account environmental, energy, economic, 

legal, social, and technological factors. These measures are considered to be between 

BARCT (the standard for existing facilities) and Best Available Control Technology (BACT) or 

equivalent to BACT. 

212 COMBINED CAPTURE AND CONTROL EFFICIENCY: Expressed in percent, the 

combined capture and control efficiency is the ratio of the weight of the VOC captured and 

removed by the control device to the weight of VOC emitted from a piece or pieces of 

equipment. The combined capture and control efficiency is calculated by the following 

equation: 

100

cap ctrl

comb

E E E× =

Where: Ecomb = Combined capture and control efficiency, % 

 Ecap = Capture efficiency, % 

Ectrl = Control efficiency, % 

213 CONFINED ANIMAL FACILITY (CAF): An agricultural stationary source where 

domesticated animals, including but not limited to, cattle, calves, horses, sheep, goats, swine, 

rabbits, chickens, turkeys, or ducks are corralled, penned, or otherwise caused to remain in 

restricted areas for commercial agricultural purposes and feeding is by means other than 

grazing. 

214 CONTROL EFFICIENCY: Expressed in percent, the control efficiency is the ratio of the 

weight of the VOC removed by the control device to the weight of VOC entering the 

control device, both measured simultaneously. Control efficiency is calculated by the 

following equation: 

×100 − = c

c a

ctrl

W

W W E

Where: Ectrl = Control efficiency, % 

Wa = Weight of VOC discharged from the control device 

 Wc = Weight of VOC entering the control device 

215 CORRAL: An area where animals are confined without separate stalls in which the animals 

may rest, including, but not limited to, drylots, pens, loafing barns, and open lots. 

216 DAIRY: A CAF that is primarily concerned with the production of milk, butter, or cheese for 

commercial purposes. 
217 DRY ANIMAL WASTE/DRY SEPARATED SOLIDS: Animal waste with less than 50% 

moisture by weight. 

218 DRY COW: A dairy cow who already given birth to its first calf but is not producing milk. 

219 EMISSION MITIGATION PLAN: A plan that outlines the activities or procedures for reducing 

air pollutants normally emitted from a CAF. 

220 FEED APRON: The area where the animals stand to consume feed in non-poultry 

operations. 

221 FEED BUNK: The area where feed is placed for the animals to eat. 

222 FREESTALL: A structure for housing animals in which the animals are contained in large 

pens under a roof and have free access to feed bunks, waterers, and stalls for resting. 

223 HEIFER: A young dairy cow that is six months or older but has not given birth to its first calf. 

224 HIGH MOISTURE CORN: Corn harvested wet with a kernel moisture content of 24 to 33%. 

225 IN-CORRAL MOUNDS: Mounds of animal waste and/or soil which are constructed, 

designed, maintained, and operated to allow animals to have a dry area to lay and rest during 

the wet season. 

226 LAGOON: A basin designed, constructed, maintained, and operated to store and treat 

animal waste. This does not include basins primarily used to collect runoff and storm water. 

227 LAND INCORPORATE: Use of a method, such as tilling, injecting, or plowing, that covers 

animal waste with soil. 

228 LARGE CONFINED ANIMAL FACILITY: Any confined animal facility that maintains on any 

one day any one or more of the following: 

228.1 1,000 or more milk-producing dairy cows; 

228.2 3,500 or more beef cattle; 

228.3 7,500 or more calves, heifers, or other cattle; 

228.4 100,000 or more turkeys; 

228.5 650,000 or more chickens other than laying hens; 

228.6 650,000 or more laying hens; 

228.7 3,000 or more swine; 

228.8 15,000 or more sheep, lambs, or goats; 

228.9 2,500 or more horses; 

228.10 650,000 or more ducks; 

228.11 30,000 or more rabbits or other animals 

229 LEAK: A liquid drip greater than 3 drops per minute, visible mist, or liquid flow. 

230 MILKING PARLOR: A structure specifically used for milking dairy cows. 

231 MITIGATION MEASURE: An activity, practice, or technology that reduces air pollutants 

normally emitted from a CAF. 

232 NRCS: The National Resources Conservation Service operated under the United States 

Department of Agriculture. 

233 PEN: An area where animals are confined without separate stalls in which the animals may 

rest. 
234 PHOTOTROPIC LAGOON: A lagoon where at least 10% of the bacteria in the lagoon are 

photosynthetic bacteria; the bacteriochlorophyll a concentration is above 1081 μg/L; or that is 

designed, constructed, maintained, and operated according the most recent NRCS guidelines 

or to other standards approved by the Air Pollution Control Officer, California Air Resources 

Board, and U.S. Environmental Protection Agency. 

235 POULTRY: Any domesticated birds kept or raised for eggs or meat. 

236 SEPARATED SOLIDS: Solids removed from animal waste by a solid separator system. 

237 SILAGE: Food for livestock processed through acid fermentation. 

238 SOLID SEPARATOR SYSTEM: A system for separating solid animal waste from liquid 

animal waste products that is designed, constructed, operated, and maintained in accordance 

with the NRCS California Field Office Technical Guide Code 632 or other applicable 

standards approved by the Air Pollution Control Officer, California Air Resources Board, and 

U.S. Environmental Protection Agency. Solid separator systems may include, but are not 

limited to, flat belt separators, roller press separators, vibrating screen separators, stationary 

inclined screen separators, and settling basins. 

239 STEAM-FLAKED CORN: Corn grain that has been cooked with steam and flaked by rollers. 

240 STORAGE POND: A basin constructed, maintained, and operated to store animal waste 

after it has been treated or processed in a lagoon. 

241 VOC CONTROL DEVICE: A device, into which captured air is vented, that reduces the VOC 

content in the air prior to the air being released into the atmosphere. 

242 WEATHERPROOF COVERING/STORAGE STRUCTURE: A covering, such as a building or 

tarp, constructed, installed, maintained, and operated such that the material inside or 

underneath the covering is not moved or moistened by weather conditions outside of the 

covering including, but not limited to, wind and rain. The covering shall be maintained 

according to manufacturer recommendations and adhere to applicable standards in NRCS 

California Field Office Technical Guide Code 313 or other applicable standards approved by 

the Air Pollution Control Officer, California Air Resources Board, and U.S. Environmental 

Protection Agency. 

300 STANDARDS

301 EMISSION MITIGATION PLAN REQUIREMENTS: Any owner/operator of a large CAF shall 

implement an emission mitigation plan in accordance with the requirements set forth in 

Section 302, 303, and 304. The emission mitigation plan shall apply to all animals in 

numbers equal to or exceeding the thresholds in Section 228, and their associated support 

stock, livestock feed, animal waste, or animal waste management at the large CAF. 

302 BARCT REQUIREMENTS: The emission mitigation plan shall include measures that meet 

the requirements of BARCT for VOC emissions. For the initial emission mitigation plan, 

BARCT shall be achieved through the requirements and mitigation measures set forth in 

Section 303. 

303 EMISSION MITIGATION MEASURES: 

303.1 DAIRIES: Dairies shall include the following emission mitigation measures, as 

required in Sections (a) through (h), in the emission mitigation plan: 

a. The owner/operator shall incorporate at least four of the following feed 

mitigation measures. Measures 1 through 7 are classified as class one 

mitigation measures. 
1. Feed according to National Research Council guidelines specified 

in “Nutrient Requirements of Dairy Cattle: Seventh Revised Edition, 

2001,” or a more recent edition. 

2. Feed animals high moisture corn or steam-flaked corn and not feed 

animals dry rolled corn. 

3. At least once every 14 days, remove feed from the area where 

animals stand to eat feed. 

4. At least once every 14 days, remove spilled feed from the area 

where equipment travels to place feed in the feed bunks. 

5. Remove uneaten wet feed from feed bunks within 24 hours of feed 

becoming wet due to rain. 

6. Feed or dispose of rations within 48 hours of grinding or mixing 

rations. 

7. Store grain in a weatherproof storage structure from October 

through May. 

b. The owner/operator shall incorporate at least one of the following silage 

mitigation measures. Measures 1 and 2 are classified as class one 

mitigation measures and measure 3 is classified as a class two mitigation 

measure. 

1. Cover the horizontal surface of silage piles, except for the area 

where feed is being removed from the silage pile. 

2. Collect leachate from silage piles and send it to a waste treatment 

system such as a lagoon at least once every 24 hours. 

3. Choose one of the following measures: 

 a) Enclose silage in a bag and vent to a VOC control device 

with a combined VOC capture and VOC control efficiency 

of at least 80%, or 

 b) Enclose silage in a weatherproof structure and vent to a 

VOC control device with a combined VOC capture and 

VOC control efficiency of at least 80%, or 

 c) Eliminate silage from animal diet. 

c. The owner/operator shall incorporate at least one of the following mitigation 

measures to implement in each milking parlor. Measure 1 is classified as a 

class one mitigation measure and measure 2 is classified as a class two 

mitigation measure.

1. Flush or hose milking parlor immediately prior to, immediately after, 

or during each milking. 

2. Enclose and vent the milk parlor to a VOC control device with an 

overall VOC capture and VOC control efficiency of at least 80% 

when animals are in the parlor. 

d. The owner/operator of a dairy which houses animals in freestalls shall 

incorporate at least two of the following mitigation measures in each 

freestall. Measures 1 through 8 are classified as class one mitigation 

measures and measure 9 is classified as a class two mitigation measure. 

1. Vacuum or scrape freestall flush lanes immediately prior to, 

immediately after, or during each milking. 

2. Inspect water pipes and troughs and repair leaks at least once 

every day. 

3. Use non-manure-based bedding for at least 90% of the bedding 

material, by weight, for freestalls (e.g. rubber mats, almond hulls, 

sand, or waterbeds). 

4. Remove animal waste that is not dry from individual cow freestall 

beds at least once every 14 days. 

5. Rake, harrow, scrape, or grade bedding in freestalls at least once 

every 14 days. 

6. Use a dry animal waste handling system, such as scraping, instead 

of a liquid animal waste handling system such as a flush system. 

7. Have no animals in corrals at any time. 
8. Flush freestalls more frequently than the milking schedule. 

9. Vacuum animal waste instead of flushing or scraping and apply 

animal waste directly to land either through injection or 

incorporation within 72 hours of removal from animal housing or 

vacuum truck. 

e. The owner/operator of a dairy which houses animals in corrals shall 

incorporate at least six of the following mitigation measures in each corral 

where animals have been housed in the last thirty days. Measures 1 

through 10 are classified as class one mitigation measures and measures 

11 and 12 are classified as class two mitigation measures. 

1. Choose one of the following measures: 

 a) Clean animal waste from corrals at least four times per 

year with at least 60 days between cleanings, or 

b) Clean corrals at least once between April and July and at 

least once between October and December, or 

c) Clean concrete areas such that the depth of animal waste 

does not exceed twelve inches at any point or time, except 

for in-corral mounding. 

2. Manage corrals such that the animal waste depth in the corral does 

not exceed twelve inches at any point or time, except for in-corral 

mounding. 

3. Knock down fence line animal waste build-up prior to it exceeding a 

height of twelve inches at any point or time. 

4. Scrape or flush feed aprons in corrals at least once every seven 

days. 

5. Slope the surface of the corrals at least 3% where the available 

space for each animal is 400 square feet or less. Slope the surface 

of the corrals at least 1.5% where the available space for each 

animal is more than 400 square feet per animal. 

6. Choose one of the following measures: 

 a) Maintain corrals to ensure drainage and to prevent water 

from standing more than 48 hours, or 

 b) Maintain corrals so that there are not indentations in the 

surface where standing water may form and remain for 

more than 48 hours. 

7. Install floats on the troughs or use another method approved by the 

Air Pollution Control Officer, California Air Resources Board, and 

U.S. Environmental Protection Agency to ensure that the water in 

the troughs does not intentionally or unintentionally overflow or spill 

onto an earthen ground. 

8. Inspect water pipes and troughs and repair leaks at least once 

every day. 

9. Harrow, rake, or scrape corrals sufficiently to maintain a dry 

surface. 

10. Choose one of the following measures: 

 a) Install no shade structures in the corrals, or 

 b) Install shade structures such that they are constructed with 

a light permeable roofing material, or 

 c) Install all shade structures uphill of any slope in the corral. 

11. Choose one of the following measures: 

 a) Use lime or a similar absorbent material in the corrals 

according to the manufacturer’s recommendations to 

minimize moisture in the corrals, or 

 b) Apply thymol to corral soil in accordance with the 

manufacturer’s recommendation. 

12. House animals in an enclosure vented to a VOC control device with 

a combined VOC capture and VOC control efficiency of at least 

80%. 
f. The owner/operator of a dairy that handles or stores solid animal waste or 

separated solids outside the animal housing shall incorporate at least two of 

the following mitigation measures. Measures 1 through 4 are classified as 

class one mitigation measures and measures 5 through 7 are classified as 

class two mitigation measures. 

1. Cover any dry animal waste piles outside of the corrals with a 

waterproof covering from October through May, except for times, 

not to exceed 24 hours, when wind removes the covering. 

2. Cover any dry separated solids outside the corrals with a waterproof 

covering from October through May, except for times, not to exceed 

24 hours, when wind removes the covering. 

3. Remove animal waste from the facility within 72 hours of removal 

from the corrals. 

4. Choose one of the following measures: 

 a) Remove separated solids from the facility within 72 hours 

of separation with a solid separation system, or 

 b) Store no separated solids outside of anaerobic digesters. 

5. Compost animal waste removed from corrals with an aerated static 

pile vented to a VOC control device with an overall VOC capture 

and VOC control efficiency of at least 80%. 

6. Store all removed animal waste in an enclosure vented to a VOC 

control device with an overall VOC capture and VOC control 

efficiency of at least 80%. 

7. Send at least 51% of the animal waste removed from animal 

housing to an anaerobic digester, with a VOC control device with an 

overall VOC capture and VOC control efficiency of at least 80%. 

g. The owner/operator of a dairy that handles animal waste in a liquid form 

shall incorporate at least one of the following measures. Measures 1 

through 4 are classified as class one mitigation measures and measures 5 

through 8 are classified as class two mitigation measures. 

1. Manage the facility such that there are no lagoons at the facility. 

2. Choose one of the following measures: 

 a) Use phototropic lagoons, or 

 b) Use an anaerobic lagoon. 

3. Remove solids from the waste system with a solid separator 

system, prior to the waste entering the lagoon. 

4. Maintain lagoon with a pH between 6.5 and 7.5. 

5. Choose one of the following measures: 

 a) Use an aerobic lagoon, or 

 b) Use a lagoon that is mechanically aerated. 

6. Maintain organic loading in the lagoon such that the total solids is 

less than 3.5 mg (dry weight)/mL. 

7. Use additional non-standard equipment or chemicals on the solid 

separator system, such as a roller or screw presses or chemical 

coagulants and flocculants, that increase the percent of solid 

separation achieved by the separator and is approved by the Air 

Pollution Control Officer, California Air Resources Board, and U.S. 

Environmental Protection Agency. 

8. Cover the lagoon or storage pond and vent to a VOC control device 

with an overall VOC capture and VOC control efficiency of at least 

80%. 

h. Owner/operators who land apply dry or liquid animal waste to land on the 

facility shall incorporate at least two of the following mitigation measures. 

Measures 1 through 4 are classified as class one mitigation measures.

1. Land incorporate all solid animal waste within 72 hours of removal 

from animal housing. 

2. Only apply solid or liquid animal waste that has been treated with an 

anaerobic or aerobic lagoon or an anaerobic digester system. 
3. Choose one of the following measures: 

 a) Apply and manage the liquid animal waste so it stands in 

the fields no more than 24 hours after application, or 

 b) Apply no liquid animal waste. 

4. Choose one of the following measures: 

 a) Apply no solid animal waste that has a moisture content of 

more than 50%, or 

 b) Apply no solid animal waste. 

303.2 POULTRY RANCHES: Poultry ranches shall include the following emission 

mitigation measures, as required in Sections (a) through (d), in the emission 

mitigation plan: 

a. The owner/operator shall incorporate at least five of the following feed 

mitigation measures. Measures 1 through 9 are classified as class one 

mitigation measures. If any of measures 1 through 5 are being utilized in 

the emission mitigation plan and the owner/operator is contractually 

obligated to use proprietary feed, the supplier of that feed must provide a 

quarterly certification to the owner/operator that the provided feed meets the 

mitigation measure(s). Additionally, the supplier must provide notice to the 

owner/operator 90 days before the provided feed ceases to meet the 

requirements of the mitigation measure. If the supplier fails to notify the 

owner/operator of such change the supplier will be responsible for any 

resulting violations.

1. Feed according to National Research Council guidelines specified 

in “Nutrient Requirements of Poultry: Ninth Revised Edition, 1994,” 

or a more recent edition. 

2. Feed animals probiotics designed to improve digestion according to 

manufacturer recommendations. 

3. Feed animals an amino acid supplement diet to meet their nutrient 

requirements. 

4. Feed animals feed additives such as amylase, xylanase, and 

protease, designed to maximize digestive efficiency according to 

manufacturer recommendations. 

5. Use feed additives designed to reduce feed decomposition or 

oxidation. 

6. Remove spilled feed from animal housing at least once every seven 

days. 

7. Enclose grain in a weatherproof storage structure from October 

through May. 

8. Feed or dispose of feed within 48 hours of grinding and mixing feed. 

9. Remove uneaten wet feed from the animal housing within 24 hours 

of feed becoming wet due to rain. 

b. The owner/operator shall incorporate four of the following mitigation 

measures in all animal housing. Measures 1 through 12 are classified as 

class one mitigation measures and measures 13 through 16 are classified 

as class two mitigation measures. 

1. Remove caked animal waste at least once every 14 days. 

2. Clean under poultry cages at least once every 14 days. 

3. Use poultry litter additives designed to reduce air emissions or 

moisture content in litter, such as aluminum sulfate or sodium 

bisulfate, according to manufacturer recommendations. 

4. Use a dry housing cleaning method at all times, except when a wet 

cleaning method is required for animal health or biosecurity issues. 

5. Use drinkers that do not have a drip system. 

6. Adjust the height, volume, and location of drinkers at least once 

every 14 days. 

7. Use no foggers in the house. 
8. Only use fogger systems designed, operated and maintained 

according to manufacturer recommendations that provide water 

droplets with an average size of 50 microns or less. 

9. Slope the floor of the house 3%. 

10. Install mounds or berms up gradient to prevent the runoff of storm 

water into pens (only an option for animals allowed to freely move 

between indoor housing structures and outdoor pens). 

11. Inspect water pipes and drinkers and repair leaks at least once 

every day. 

12. Maintain the roof structure and manage roof runoff in accordance 

with the applicable standards in the NRCS Field Office Technical 

Guide Code 558 or other applicable standards approved by the Air 

Pollution Control Officer, California Air Resources Board, and U.S. 

Environmental Protection Agency. 

13. Vent animal housing to a VOC control device with an overall VOC 

capture and VOC control efficiency of at least 80%. 

14. Use a belt litter removal system that dries the litter. 

15. House animals in a tunnel ventilated house with mechanical 

ventilation. 

16. Use a litter drying system, such as a flat bed drying system. 

c. The owner/operator of a poultry ranch that handles or stores solid animal 

waste or separated solids outside the animal housing shall incorporate at 

least one of the following mitigation measures. Measures 1 through 3 are 

classified as class one mitigation measures and measures 4 and 5 are 

classified as class two mitigation measures. 

1. Choose one of the following measures: 

 a) Remove all animal waste from facility within 72 hours of 

removal from animal housing, or 

 b) Send all animal waste to a lagoon within 72 hours of 

removal from animal housing. 

2. Cover animal waste outside the animal housing with a waterproof 

covering from October through May, except for times, not to exceed 

24 hours, when wind removes the covering. 

3. Use a solid animal waste handling system in housing, such as 

stockpiles, solid land application, or a thin bed animal waste drying 

system, instead of a liquid system such as flushing, animal waste 

storage ponds, or animal waste treatment lagoons. 

4. Send at least 51% of the animal waste removed from site to an 

anaerobic digester, with a VOC control device with an overall VOC 

capture and VOC control efficiency of at least 80%. 

5. Compost animal waste removed from the animal housing with an 

aerated static pile vented to a VOC control device with an overall 

VOC capture and VOC control efficiency of at least 80%. 

d. The owner/operator of a poultry ranch that handles animal waste in a liquid 

form shall incorporate at least one of the following mitigation measures. 

Measures 1 through 4 are classified as class one mitigation measures and 

measures 5 through 8 are classified as class two mitigation measures. 

1. Manage the facility such that there are no lagoons at the facility. 

2. Choose one of the following measures: 

 a) Use phototropic lagoons, or 

 b) Use an anaerobic lagoon. 

3. Remove solids from the waste system with a solid separator 

system, prior to waste entering the lagoon. 

4. Maintain lagoon pH between 6.5 and 7.5. 

5. Choose one of the following measures: 

 a) Use an aerobic lagoon, or 

 b) Use a mechanically aerated lagoon. 
6. Maintain organic loading in the lagoon that is less than 3.5 mg (dry 

weight)/mL. 

7. Use additional non-standard equipment or chemicals on the solid 

separator system, such as roller or screw presses or chemical 

coagulants and flocculants, that increase the percent of solid 

separation achieved by the separator and is approved by the Air 

Pollution Control Officer, California Air Resources Board, and U.S. 

Environmental Protection Agency. 

8. Cover the lagoon or storage pond and vent to a VOC control device 

with an overall VOC capture and VOC control efficiency of at least 

80%. 

303.3 OTHER CONFINED ANIMAL FACILITIES: Any other large CAF that is not 

mentioned in Sections 303.1 or 303.2 shall submit an emission mitigation plan to the 

District demonstrating BARCT in accordance with Section 302. The emission 

mitigation plan must achieve equal or greater emission reduction as the minimum 

percent attained by a facility complying with either Section 303.1 or 303.2. The 

emission mitigation plan must be approved by the Air Pollution Control Officer, 

California Air Resources Board, and U.S. Environmental Protection Agency.

303.4 MEASURE SUBSTITUTION: An owner/operator may substitute a mitigation 

measure from one of the subsections in Sections 303.1 or 303.2 for another 

mitigation measure in a different subsection for the same type of CAF, if it can be 

shown that the substitution results in greater or equal emission reduction than 

without the substitution. The measure substitution must be approved by the Air 

Pollution Control Officer, Air Resources Board, and U.S. Environmental Protection 

Agency.

304 ALTERNATIVE EMISSION MITIGATION PLAN: An owner/operator may submit an 

alternative emission mitigation plan in lieu of complying with Sections 303.1 and 303.2 that 

can achieve equal or greater emission reduction than the minimum amount of reduction that 

would have been achieved by complying with the applicable section. The alternative 

emission mitigation plan must be approved by the Air Pollution Control Officer, California Air 

Resources Board, and U.S. Environmental Protection Agency. 

305 OPERATING, MAINTENANCE, AND DESIGN

305.1 AEROBIC, ANAEROBIC, AND MECHANICALLY AERATED LAGOONS: Any 

aerobic, anaerobic, or mechanically aerated lagoon used in the implementation of a 

mitigation measure shall be designed, constructed, maintained, and operated in 

accordance with the applicable standards in the NRCS California Field Office 

Technical Guide Code 359 or other applicable standards approved by the Air 

Pollution Control Officer, California Air Resources Board, and U.S. Environmental 

Protection Agency. 

305.2 ANAEROBIC DIGESTERS: Any anaerobic digester used in the implementation of a 

mitigation measure shall be designed, constructed, maintained, and operated in 

accordance with the applicable standards in the NRCS California Field Office 

Technical Guide Code 365 or 366 or other applicable standards approved by the Air 

Pollution Control Officer, California Air Resources Board, and U.S. Environmental 

Protection Agency. 

305.3 PHOTOTROPIC LAGOONS: Any phototropic lagoon used in the implementation of 

a mitigation measure must be designed, constructed, maintained, and operated in 

accordance with the applicable standards in the most recent NRCS code or 

guidelines or other applicable standards approved by the Air Pollution Control 

Officer, California Air Resources Board, and U.S. Environmental Protection Agency. 

305.4 SOLID SEPARATOR SYSTEMS: Any solid separator system used in the 

implementation of a mitigation measure shall be designed, constructed, operated, 

and maintained in accordance with the NRCS California Field Office Technical Guide 

Code 632 or other applicable standards approved by the Air Pollution Control Officer, 

California Air Resources Board, and U.S. Environmental Protection Agency. 
305.5 WEATHERPROOF COVERINGS/STORAGE STRUCTURES: Any weatherproof 

covering or storage structure used in the implementation of a mitigation measure 

shall be maintained according to manufacturer recommendations and adhere to 

applicable standards in NRCS California Field Office Technical Guide Code 313 or 

other applicable standards approved by the Air Pollution Control Officer, California 

Air Resources Board, and U.S. Environmental Protection Agency. 

305.6 VOC CONTROL DEVICES: Any VOC control device used in the implementation of 

a mitigation measure shall be operated and maintained according to the 

manufacturer’s specifications. 

400 ADMINISTRATIVE REQUIREMENTS 

401 PERMIT APPLICATION: The owner/operator of a large CAF shall submit to the Air Pollution 

Control Officer, pursuant to Rule 215, AGRICULTURAL PERMIT REQUIREMENTS AND 

NEW AGRICULTURAL PERMIT REVIEW, an application for a permit by February 20, 2007, 

which in addition shall include the following:

401.1 The average number of animals in the large CAF, for the previous 12 month period, 

in each of the following categories: milk-producing dairy cows, beef cattle, calves, 

heifers, other cattle, turkeys, laying hens, chickens other than laying hens, swine, 

sheep, lambs, goats, horses, ducks, or rabbits, or other animals. 

401.2 The maximum number of animals in the large CAF, for any given day in the previous 

12 month period, in each of the following categories: milk-producing dairy cows, beef 

cattle, calves, heifers, other cattle, turkeys, laying hens, chickens other than laying 

hens, swine, sheep, lambs, goats, horses, ducks, or rabbits, or other animals. 

401.3 An emission mitigation plan that identifies the mitigation measures selected to meet 

the requirements of Section 302, 303, and 304. 

402 IMPLEMENTATION SCHEDULE: Upon approval of the permit, the owner/operator of the 

large CAF shall implement the emission mitigation plan according to a schedule outlined by 

the Air Pollution Control Officer, and shall complete implementation of the emission mitigation 

plan within one year. 

403 EMISSION MITIGATION PLAN UPDATE:

403.1 UPDATE: The owner/operator of a large CAF shall submit an emission mitigation 

plan update 27 months after the approval of the permit. Subsequent updates will be 

submitted 27 months after the approval of the previous update or a permit 

modification. 

a. The emission mitigation plan update shall include: 

1. information showing complete compliance with the permit, 

2. animal inventories as defined in Sections 401.1 and 401.2, 

3. proposed changes to the emission mitigation plan, and, 

4. additional measures to meet the requirements of Section 302, if 

required. 

b. The Air Pollution Control Officer shall determine whether the update is 

complete no later than 30 days after receipt of the update or after such time 

as agreed in writing. Completeness shall also be determined based on a 

payment of a fee pursuant to Rule 310, PERMIT FEES – AGRICULTURAL 

SOURCE, Section 312. If the Air Pollution Control Officer determines that 

the update is not complete, the owner/operator shall be notified in writing of 

the decision specifying the information required. The Air Pollution Control 

Officer may, during the processing of the update, request an owner/operator 

to clarify, amplify, correct, or otherwise supplement the information 

submitted in the update. 

c. Upon receipt of any re-submittal of the update pursuant to Section 403.1.b, 

a new 30-day period to determine completeness shall begin. 

d. If the Air Pollution Control Officer determines the application is still 

incomplete, the applicant may appeal this decision to the Sacramento 

Metropolitan Air Quality Management District Board of Directors. 
e. In the event that a written determination of incompleteness is not made 

within 30 days of the filing of the application, or within 30 days of providing 

further information as required by Section 403.1, the update shall be 

deemed complete. 

403.2 APPROVAL: Following the acceptance of the update as complete, the Air Pollution 

Control Officer shall perform evaluations to determine compliance of the facility with 

the current BARCT. 

a. If the update proposes changes to the mitigation measures, or if the Air 

Pollution Control Officer determines that changes to the mitigation measures 

will be required the owner/operator will be required to: 

1. submit an application for a permit modification pursuant to Rule 

215, AGRICULTURAL PERMIT REQUIREMENTS AND NEW 

AGRICULTURAL PERMIT REVIEW; and 

2. show that the changes meet the requirements of Section 302 and 

that the new emission mitigation plan will not result in less emission 

reduction than the previous emission mitigation plan. 

b. If no changes to the permit are required the Air Pollution Control Officer will 

take final action on the update no later than 90 days after acceptance of the 

update as complete or after such longer time as both the owner/operator 

and the Air Pollution Control Officer have agreed in writing. 

c. The Air Pollution Control Officer shall consider all written comments prior to 

taking final action on the update. 

403.3 PUBLIC NOTIFICATION: The Air Pollution Control Officer shall make available for 

public inspection at the District’s office the information submitted by the 

owner/operator of the large CAF. Notice of the intent to approve shall be published 

in at least one newspaper of general circulation in the District and shall note how 

pertinent information can be obtained, and inviting written public comment for a 30-

day period following the date of publication. All such information shall be transmitted 

to the California Air Resources Board and to any party which requests such 

information. Information that contains trade secrets shall be handled in accordance 

with Section 6254.7 of the California Government Code and relevant sections of the 

California Administrative Code. 

403.4 FINAL PUBLIC NOTIFICATION: The Air Pollution Control Officer shall provide 

written notice of the final action taken on updates subject to the Public Notification 

requirement of Section 403.3 to the owner/operator of the large CAF, the California 

Air Resources Board and to any person who submitted written comments pursuant to 

Section 403.3. A notice shall be published in at least one newspaper of general 

circulation in the District and shall note how pertinent information can be obtained. 

403.5 DENIAL: In the event of denial of the emission mitigation plan update, the Air 

Pollution Control Officer shall notify the owner/operator of the large CAF in writing of 

the reasons therefore. Service of this notification may be made in person or by mail, 

and such service may be provided by the written acknowledgement of the persons 

served or affidavit of the person making the service. 

403.6 APPEALS: Within thirty days after notice, by the Air Pollution Control Officer, of 

denial of an emission mitigation plan update the owner/operator or any other 

aggrieved person who participated in the update process may petition the Hearing 

Board, in writing, for an order modifying or reversing that decision. The Hearing 

Board, after notice and a public hearing held within thirty days after filing the petition, 

may sustain or reverse the action of the Air Pollution Control Officer; such order may 

be subject to specified conditions. 

404 CALCULATION FOR DETERMINING PERCENT OF ANIMAL WASTE OR SEPARATED 

SOLIDS BEING SENT TO AN ANAEROBIC DIGESTER: 

404.1 DAIRIES: The percent of animal waste or separated solids being sent to the 

anaerobic digester on a dairy will be determined by the following equation: 
100

150 83 33.5 13.5

% ×

× + × + × + × = N M N D N H NC

M W

Where: %W = percent of animal waste or separated solids 

being sent to the digester on a daily basis.

 M = the rate of animal waste or separated solids 

being sent to the digester, in lb/day 

 NM = the number of milk-producing cows at the dairy 

 ND = the number of dry cows at the dairy 

 NH = the number of heifers at the dairy 

 NC = the number of calves at the dairy 

404.2 POULTRY RANCHES: The percent of animal waste or separated solids being sent 

to the anaerobic digester on a poultry ranch will be determined by the following 

equation: 

% = ×100

MT

M W

Where: %W = percent of animal waste or separated solids 

being sent to the digester 

 M = the rate of animal waste or separated solids 

being sent to the digester, in lb per house 

cleaning 

 MT = the total amount of animal waste or separated 

solids produced at the poultry ranch, in lb per 

house cleaning 

500 MONITORING AND RECORDS

501 MONITORING AND RECORDKEEPING: The following records will be kept on site for a 

minimum of five years and shall be made available when requested by the Air Pollution 

Control Officer. All records must be sufficient to demonstrate compliance with the permit.

501.1 GENERAL 

a. ANIMAL COUNT: The owner/operator must keep a record of the total 

number of animals in each of the following categories, upon approval of the 

permit: milk-producing dairy cows, heifers, calves, beef cattle, other cattle, 

laying hens, chickens other than laying hens, turkeys, swine, sheep, lambs, 

goats, horses, ducks, rabbits, or other animal. The record shall be updated, 

once per day, if needed, to reflect any change in the total animal count 

including when animals are bought, sold, born, die, or are transferred from 

the CAF for any other reason. 

b. MANUFACTURERS INFORMATION: The owner/operator must keep any 

information provided by the manufacturer regarding the operation or 

implementation of a product used in an emission mitigation measure. 

c. DESIGN SPECIFICATIONS: The owner/operator must keep any design 

specifications related to anything built or created specifically for the facility in 

order to implement an emission mitigation measure. 

d. TEST RECORDS: All records of any monitoring or testing must be kept on 

site. 

e. ADDITIONAL MONITORING: An owner/operator shall test any other 

parameters determined necessary by the Air Pollution Control Officer to 

demonstrate compliance with rule requirements as frequently as determined 

necessary. 

f. ADDITIONAL INFORMATION: The owner/operator must keep any 

additional supporting information, determined by the Air Pollution Control 

Officer, necessary to confirm the implementation of the emission mitigation 

plan. 
501.2 MULTIPLE CATEGORIES 

a. PERIODICALLY PERFORMED MEASURES: Any owner/operator who 

implements a mitigation measure that requires periodic actions, as in 

Sections 303.1(a)(3), 303.1(a)(4), 303.1(d)(1), 303.1(d)(4), 303.1(d)(5), 

303.1(d)(8), 303.1(e)(1)(a or b), 303.1(e)(4), 303.2(a)(5), 303.2(b)(1), 

303.2(b)(2), and 303.2(b)(6), must keep a log of when those actions were 

performed. 

b. VOC CONTROL DEVICES: Any owner/operator who is using a VOC 

control device as part of a mitigation measure, as in Sections 303.1(b)(3)(a 

or b), 303.1(c)(2), 303.1(e)(12), 303.1(f)(5), 303.1(f)(6), 303.1(f)(7), 

303.1(g)(8), 303.2(b)(13), 303.2(c)(4), 303.2(c)(5), and 303.2(d)(8), shall 

conduct an initial source test of all VOC control devices not later than twelve 

months after the date of installation, and at least once every twelve months 

thereafter. All test records will be kept on site.

c. ANAEROBIC DIGESTERS: Any owner/operator who implements a 

mitigation measure related to using an anaerobic digester, as in Sections 

303.1(f)(4)(b), 303.1(f)(7), 303.1(h)(2), and 303.2(c)(4), shall keep records of 

the pounds of solid animal waste and separated solids being sent to the 

digester. Additionally, records will be kept to show the digester meets the 

specifications listed in the NRCS California Field Office Technical Guide 

Code 365 or 366 or other applicable standards approved by the Air Pollution 

Control Officer, California Air Resources Board, and U.S. Environmental 

Protection Agency. 

501.3 FEED AND SILAGE 

a. FEED CONTENT: Any owner/operator who implements a mitigation 

measure related to feed content, as in Sections 303.1(a)(1), 303.1(a)(2), 

303.1(b)(3)(c), 303.2(a)(1) through 303.2(a)(4), and 303.2(a)(8), shall keep: 

1. records of feed content, formulation, supplements and/or quantity of 

feed additive utilized, as applicable; or 

2. if the owner/operator is contractually obligated to use proprietary 

feed, then the quarterly certifications as required in Section 303.2(a) 

shall be kept on site and the supplier will make all records of feed 

content, formulation, supplements and/or quantity of additive 

utilized, as applicable, available upon request by the Air Pollution 

Control Officer. 

b. FEED PROCESSING: Any owner/operator who implements a mitigation 

measure related to feed processing, as in Sections 303.1(a)(6) and 

303.2(a)(7), must keep a log of when feed is processed and when that 

processed feed is either fed to the animals or disposed. 

c. UNEATEN WET FEED: Any owner/operator who implements a mitigation 

measure related to removing wet feed, as in Sections 303.1(a)(5) and 

303.2(a)(9), must record when any wet feed was removed. 

d. SILAGE LEACHATE: Any owner/operator who implements a mitigation 

measure related to collecting silage leachate, as in Section 303.1(b)(2), and 

is actively collecting the leachate must keep a log of the date and the 

manner in which the leachate was collected. 

 501.4 ANIMAL HOUSING 

a. CORRAL USAGE: Any owner/operator who houses animals in corrals must 

keep a record of when a corral stops being used for animal housing. 

b. LEAK INSPECTION AND REPAIR: Any owner/operator who implements a 

mitigation measure related to water leak inspection and repair, as in 

Sections 303.1(d)(2), 303.1(e)(8), and 303.2(b)(11), shall keep a log of when 

inspections took place and a description of any repairs that took place. 

c. ANIMAL WASTE DEPTH: Any owner/operator who implements a 

mitigation measure related to animal waste depth, as in Sections 

303.1(e)(1)(c), 303.1(e)(2), and 303.1(e)(3), must record when the animal 

waste is cleaned from the area. 
d. LIME, THYMOL, OR OTHER ABSORBENT MATERIAL: Any 

owner/operator who implements a mitigation measure related to the 

application of lime, thymol, or some other absorbent material, as in Section 

303.1(e)(11), shall keep records of amount, date and location of where 

material was applied. 

e. POULTRY LITTER ADDITIVES: Any owner/operator who implements a 

mitigation measure related to poultry litter additives, as in Section 

303.2(b)(3), must record the date and location of where the additive was 

applied and the quantity of additive applied. 

f. ROOF MAINTENANCE AND RUNOFF: Any owner/operator implementing 

a mitigation measure related to roof maintenance and runoff, as in Section 

303.2(b)(12), must keep all information showing compliance with the 

standards in the NRCS Field Office Technical Guide Code 558 or other 

applicable standards approved by the Air Pollution Control Officer, California 

Air Resources Board, and U.S. Environmental Protection Agency. 

501.5 SOLID ANIMAL WASTE AND SEPARATED SOLIDS 

a. ANIMAL WASTE OR SEPARATED SOLIDS REMOVAL: Any 

owner/operator who implements a mitigation measure related to removal of 

animal waste or separated solids from the facility, as in Sections 303.1(f)(3), 

303.1(f)(4)(a), and 303.2(c)(1)(a), or if poultry animal waste is being sent to 

a lagoon, as in Section 303.2(c)(1)(b), must record when the animal waste 

or separated solids were removed from the animal housing or the solids 

separator, when they were removed from the facility or sent to the lagoon, 

and the amount removed.

501.6 LIQUID ANIMAL WASTE 

a. PHOTOTROPIC LAGOONS: Any owner/operator who is using a 

phototropic lagoon as a mitigation measure, as in Sections 303.1(g)(2)(a) or 

303.2(d)(2)(a), shall test and record the lagoon for bacteria concentration, 

bacteriochlorophyll a concentration, or a surrogate parameter according to 

the most recent NRCS guidelines no later than twelve months after issuance 

of the permit and at least once every twelve months thereafter. 

b. AEROBIC LAGOONS: Any owner/operator who is using an aerobic lagoon 

as a mitigation measure, as in Sections 303.1(g)(5)(a), 303.1(h)(2) and 

303.2(d)(5)(a), shall test and record the lagoon for dissolved oxygen content 

no later than twelve months after the date of issuance of the permit, and at 

least once every three months thereafter. All information must be kept 

showing compliance with the standards in the NRCS California Field Office 

Technical Guide Code 359 or other applicable standards approved by the 

Air Pollution Control Officer, California Air Resources Board, and U.S. 

Environmental Protection Agency. 

c. ANAEROBIC LAGOONS: Any owner/operator who is using an anaerobic 

lagoon as a mitigation measure, as in Sections 303.1(g)(2)(b), 303.1(h)(2) 

and 303.2(d)(2)(b), shall keep all information showing compliance with the 

standards in the NRCS California Field Office Technical Guide Code 359 or 

other applicable standards approved by the Air Pollution Control Officer, 

California Air Resources Board, and U.S. Environmental Protection Agency. 

d. SOLID SEPARATORS: Any owner/operator who implements a mitigation 

measure related to using a solid separator, as in Sections 303.1(g)(3) and 

303.2(d)(3), must keep all information showing compliance with the 

standards set forth in the NRCS California Field Office Technical Guide 

Code 632 or other applicable standards approved by the Air Pollution 

Control Officer, California Air Resources Board, and U.S. Environmental 

Protection Agency. 

e. MECHANICALLY AERATED LAGOONS: Any owner/operator who is using 

a mechanically aerated lagoon as a mitigation measure, as in Sections 

303.1(g)(5)(b) and 303.2(d)(5)(b), shall test and record the lagoon for 

biological oxygen demand within twelve months after the date of issuance of 

the permit and at least once every twelve months thereafter. All information 
must be kept showing compliance with the standards in the NRCS California 

Field Office Technical Guide Code 359 or other applicable standards 

approved by the Air Pollution Control Officer, California Air Resources 

Board, and U.S. Environmental Protection Agency. 

f. LAGOON PH: Any owner/operator who is controlling the pH of their lagoon 

as a mitigation measure, as in Sections 303.1(g)(4) and 303.2(d)(4), shall 

test and record the lagoon for pH no later than twelve months after issuance 

of the permit and at least once every three months thereafter. 

g. ORGANIC LOADING: Any owner/operator who is controlling the organic 

loading of their lagoon as a mitigation measure, as in Sections 303.1(g)(6) 

and 303.2(d)(6), shall test and record the organic content of the lagoon no 

later than twelve months after issuance of the permit and at least once every 

three months thereafter. 

501.7 LAND APPLICATION 

a. ANIMAL WASTE LAND APPLICATION: Any owner/operator who 

implements a mitigation measure related to animal waste land application, 

as in Sections 303.1(d)(9), 303.1(h)(1), 303.1(h)(2), and 303.1(h)(3)(a), shall 

keep records of the date, location, and quantity of animal waste that is 

applied to the land. In addition, if implementing the mitigation measures in 

Sections 303.1(d)(9) or 303.1(h)(1), a record of when solid animal waste is 

removed from animal housing shall be kept. 

502 TEST METHODS: The following test methods shall be used to determine compliance with 

applicable emission mitigation measures: 

502.1 BIOLOGICAL OXYGEN DEMAND: The biological oxygen demand shall be 

determined by U.S. Environmental Protection Agency Method 405.1. 

502.2 DISSOLVED OXYGEN: The dissolved oxygen content shall be determined by U.S. 

Environmental Protection Agency Method 360.1 or 360.2. 

502.3 PH: The pH shall be determined by U.S. Environmental Protection Agency Method 

150.1 or ASTM method D4980-89. 

502.4 MOISTURE CONTENT: The moisture content shall be determined by the difference 

from the percent residue using U.S. Environmental Protection Agency Method 160.3. 

502.5 ORGANIC LOADING: The organic loading rate shall be determined by the Standard 

Methods of the Examination of Water and Wastewater Method 2540 G – Solids. 

502.6 PHOTOTROPIC LAGOONS: Phototropic lagoons will be tested according to the 

most recent NRCS guidelines.

502.7 VOLATILE ORGANIC COMPOUNDS: Volatile organic compound emissions shall 

be determined using U.S. Environmental Protection Agency Test Method 25 or 25A. 

If U.S. Environmental Protection Agency Test Method 25A is used, U.S. 

Environmental Protection Agency Test Method 18 shall be used to determine 

methane content. 

502.8 TRAVERSE POINTS AND FLOW RATES: Traverse points and flow rates for 

source tests and traverses shall be determined by U.S. Environmental Protection 

Agency Methods 1 or 1A and 2 or 2C, as applicable. 

502.9 DETERMINATION OF CAPTURE EFFICIENCY: Efficiency of the collection 

system shall be determined in accordance with U.S. EPA “Guidelines for 

Determining Capture Efficiency, January 9, 1995". Individual collection efficiency 

test runs subject to the U.S. EPA technical guidelines shall be determined by: 

a. Applicable U.S. EPA methods 204, 204A, 204B, 204C, 204E, and/or 

204F; or 

b. The South Coast Air Quality Management District “Protocol for 

Determination of Volatile Organic Compound (VOC) Capture Efficiency”; 

or 

c. Any other method approved by the U.S. EPA, the California Air 

Resources Board, and the Air Pollution Control Officer. 
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