REVISED PROPOSED October 21, 2010 

4570 - 1 Revised Proposed Rule 4570

RULE 4570 CONFINED ANIMAL FACILITIES (Adopted June 15, 2006; Readopted June 

18, 2009); Amended [rule adoption date]) 

1.0 Purpose 

The purpose of this rule is to limit emissions of volatile organic compounds (VOC) 

from Confined Animal Facilities (CAF). 

2.0 Applicability 

The provisions of this rule shall apply to any Confined Animal Facility. 

3.0 Definitions 

3.1 Aerated Static Pile (ASP): 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%.

3.2 Aerobic Digester: a basin or tank designed, constructed, maintained, and 

operated for the aerobic treatment of liquid or solid animal waste manure that is 

approved by the APCO, ARB, and EPA. 

3.3 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 

Conservation Practice Standard Code 359 or other applicable standards 

approved by the APCO, ARB, and EPA. 

3.4 Alternative Mitigation Measure: a mitigation measure that is determined by the 

APCO, ARB, and EPA to achieve reductions that are equal to or exceed the 

reductions that would be achieved by other mitigation measures listed in this 

rule that owners/operators could choose to comply with rule requirements. 

3.5 Anaerobic Digester: a basin or tank designed, constructed, maintained, and 

operated for the anaerobic treatment of liquid or solid animal waste manure in 

accordance with the applicable standards for anaerobic digesters in the Natural 

Resource Conservation Service (NRCS) California Field Office Technical Guide 

Conservation Practice Standard Code 359 365 or 366 or other applicable 

standards approved by the APCO, ARB, and EPA. 
REVISED PROPOSED October 21, 2010 

4570 - 2 Revised Proposed Rule 4570

3.6 Anaerobic Treatment: the decomposition of organic matter by microbes in the 

absence of oxygen. During this process four main reactions occur. In the first 

reaction, complex organic materials (e.g. carbohydrates, proteins, and fats) are 

hydrolyzed to form soluble organic molecules (e.g. sugars, amino acids, and 

fatty acids). In the second reaction, soluble organic molecules ferment to form 

acetic acid, formic acid, and volatile fatty acids. In the third reaction, volatile 

fatty acids undergo acetogenesis to form acetic acid and formic acid. In the 

fourth reaction, acetic acid and formic acid undergo methanogenesis to form 

methane and carbon dioxide. 

3.7 Anaerobic Treatment Lagoon: a lagoon designed, constructed, maintained, and 

operated in accordance with the standards for anaerobic lagoons in the Natural 

Resource Conservation Service (NRCS) California Field Office Technical Guide 

Conservation Practice Standard Code 359 or other applicable standards 

approved by the APCO, ARB, and EPA. 

3.8 Animal Waste Manure: any animal excretions and mixtures containing animal 

excretions, except for material meeting the definition of separated solids. 

3.9 APCO: as defined in Rule 1020 (Definitions). 

3.10 ARB: as defined in Rule 1020 (Definitions). 

3.11 Beef Feedlot: a CAF that is primarily concerned with raising cattle for the 

production of meat for commercial purposes. 

3.12 Biofilter: a pollution control technique using living material to capture and 

biologically degrade process pollutants. A biofilter is usually a bed of organic 

material (medium), typically a mixture of compost and wood chips or shreds. 

As air passes through the biofilter, the microbes on the organic material convert 

contaminants in the air stream to carbon dioxide and water.

3.13 3.12 CDFA: California Department of Food and Agriculture or any person 

designated to act on its behalf. 

3.14 Cereal Grains: grasses (members of the monocot families Poaceae or 

Gramineae) cultivated for the edible components of their fruit. These grains 

include corn, rice, wheat, barley, sorghum, millet, oats, rye, triticale, and 

fonio. For the purposes of this rule, buckwheat and quinoa will also be 

considered cereal grains.

3.15 3.13 Certified Nutritionist: a nutritionist certified by the American Registry of 

Professional Animal Scientists or who is approved by the APCO, ARB, and 

EPA. 
REVISED PROPOSED October 21, 2010 

4570 - 3 Revised Proposed Rule 4570

3.16 3.14 Class One Mitigation Measures: a mitigation measure or combination of 

measures for the specific source category that, at the time of rule adoption, are 

considered to be the Best Available Retrofit Control Technology (BARCT) for 

VOC, as defined in the California Health and Safety Code Section 40406. 

3.17 3.15 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 Best Available Retrofit Control Technology (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, or theoretically 

feasible measures that may be beyond BACT. 

3.18 Composting: the controlled biological decomposition of organic material, under 

aerobic (with air) or anaerobic (without air) conditions, to form a humus-like 

material.

3.19 3.16 Confined Animal Facility (CAF): a facility where animals are corralled, 

penned, or otherwise caused to remain in restricted areas for commercial 

purposes and primarily fed by a means other than grazing for at least forty-five 

(45) days in any twelve (12) month period. 

3.20 3.17 Contiguous or Adjacent Property: as defined in Rule 2201 (New and 

Modified Stationary Source Review). 

3.21 3.18 Corral/Drylot/Exercise Pen/Loafing Barns/Open Lots: an area where 

animals are confined without separate stalls in which the animals may rest. 

(also referred to as dry lot, pen, exercise pen, loafing barn, saudi barn or open 

lot).

3.22 3.19 Dairy: a CAF that is primarily concerned with the production of milk, 

butter, or cheese for commercial purposes. 

3.23 3.20 Day: a twenty-four hour period beginning at 12:00 a.m. and ending at 

midnight. 

3.24 3.21 District: as defined in Rule 1020 (Definitions). 

3.25 3.22 Dry Animal Waste Manure/Dry Separated Solids: animal waste manure or 

separated solids with less than 50% moisture, by weight, moisture, not 

including any materials used for on-site composting operations.
REVISED PROPOSED October 21, 2010 

4570 - 4 Revised Proposed Rule 4570

3.26 Dry Rolled Corn: any corn that is crushed between rollers without previous 

treatment with steam or another softening process.

3.27 3.23 Emission Mitigation Plan: a document that lists and describes all VOC 

mitigation measures to be implemented at the CAF. The description shall be 

sufficiently detailed, such that another person could duplicate the measure by 

reading the description (e.g. for feed additives the description shall include the 

name of the additive used and the amount of the additive used).

3.28 3.24 EPA: the United States Environmental Protection Agency or any person 

designated to act on its behalf. 

3.29 3.25 Facility: a source or group of air pollution sources located on one or more 

properties that are contiguous, adjacent, or separated only by a public right-ofway and are under common ownership, common control, or operated by entities 

that are under common ownership or control. A facility includes, but is not 

limited to, all barns, buildings, coops, corrals, feed storage areas, installations, 

milking parlors, structures, and systems for the collection, distribution, storage, 

and treatment of animal waste manure on the properties. 

3.30 3.26 Feed Bunk: the area where feed is placed for the animals to eat the feed. 

3.31 Feedlanes: the area in which the animal stands while eating feed. This area may 

also be referred to as a flush or scrape concrete lane.

3.32 3.27 Freestall Barn: a structure for housing animals in which the animals are 

contained in pens under a roof and have free access to feed bunks, waterers, and 

stalls for resting. 

3.33 High Moisture Corn: corn which, at harvest, has a kernel moisture of greater 

than 25%.

3.34 3.28 In-corral Mounds: mounds of animal waste manure and/or soil which are 

constructed, designed, maintained, and operated by the owner/operator to allow 

animals to have a dry area to lay and rest during the wet season. 

3.35 3.29 Lagoon: a basin constructed, maintained, and operated to store and treat 

animal waste manure. This does not include basins primarily used to collect 

runoff and stormwater. 

3.36 3.30 Land Incorporate: use of a method, such as tilling, injecting, or plowing, 

that covers animal waste manure with soil. 
REVISED PROPOSED October 21, 2010 

4570 - 5 Revised Proposed Rule 4570

3.37 Large CAF: a CAF that maintains, on any one day, at least the following 

number of animals:

Table 1 – Large CAF Definition by Livestock Category

Livestock Category Large CAF Definition

Dairy 1,000 milking cows

Beef Feedlots 3,500 beef cattle

Other Cattle Facility 7,500 calves, heifers, or other cattle

Poultry Facilities

Chicken 650,000 head

Duck 650,000 head

Turkey 100,000 head

Swine Facility 3,000 head 

Horses Facility 2,500 head

Sheep and Goat Facilities 15,000 head of sheep, goats, or any combination of the two

Any livestock facility not 

listed above 30,000 head

3.38 3.31 Licensed Veterinarian: a veterinarian licensed by the State of California or a 

veterinarian that is approved by the APCO, ARB, and EPA. 

3.39 3.32 Livestock: any domesticated animal kept or raised for the production of 

eggs, milk, wool, or meat. 

3.40 Mature Cow: a cow that has had at least one calf.

3.41 Medium Dairy CAF: a dairy CAF that maintains, on any one day, at least 500 

milking cows, but is not a large dairy CAF.

3.42 3.33 Milking Cow: a cow that is currently producing milk (lactating). 

3.43 3.34 Mitigation Measure: an activity, practice, or technology that reduces VOC 

air pollutants emitted by or associated with a CAF. 

3.44 3.35 NRC: the National Research Council of the United States of America. 

3.45 3.36 NRCS: the Natural Resource Conservation Service operated under the 

United States Department of Agriculture. 

3.46 Nursery Pig: For the purposes of this rule, any pig that has been weaned and is 

less than forty-five (45) pounds in weight.

3.47 3.37 Other Cattle Facility: a CAF housing cattle that does not meet the definition 

of a Beef Feedlot or Dairy. 
REVISED PROPOSED October 21, 2010 

4570 - 6 Revised Proposed Rule 4570

3.48 3.38 Owner/Operator: any person who owns, leases, supervises, or operates a 

Confined Animal Facility or equipment on such a facility. 

3.49 Oxygen Barrier Film: a plastic film with an oxygen transfer rate not exceeding 

200 cm3/(m2-24 hrs) as measured by ASTM D3985 or a plastic film with an 

equivalent oxygen transfer rate as determined by methods approved by the 

APCO and EPA.

3.50 Phase Feeding: the feeding of multiple diets during the nursery stage and during 

the grower/finisher phase.

3.51 3.39 Phototropic Lagoon: a lagoon where at least 10% of the bacteria in the 

lagoon are photosynthetic bacterium; the bacteriochlorophyll a concentration is 

above 1081 μg/L; or that is designed, constructed, maintained, and operated 

according to other standards approved by the APCO, ARB, and EPA. 

3.52 3.40 Poultry: any domesticated birds kept or raised for eggs or meat. 

3.53 Poultry Litter: poultry excretions and bedding, including, but not limited to, 

dried solids, manure, urine and bedding from chickens, turkeys, geese, or 

ducks.

3.54 Poultry Molt: the periodic replacement of feathers by shedding old feathers 

while producing new ones.

3.55 Processed Cereal Grain or Processed Corn: cereal grains or corn that have 

undergone one or more processes to changes the underlying chemical structure 

compared to the cereal grain or corn as harvested.

3.56 Rain Event: precipitation greater than 0.1 inch in 24 hours at the facility. 

3.57 3.41 Separated Solids: solids removed from manure by a solid separator system, 

not including any materials used for onsite composting operations.

3.58 3.42 Shade Structure: a structure designed, constructed, installed, maintained, 

and operated to provide shade for livestock. 

3.59 3.43 Solid Separator System: a system for separating solid animal waste manure

from the liquid animal waste manure stream products that is designed, installed, 

constructed, operated, and maintained in accordance with the applicable 

standards in California NRCS Field Office Technical Guide Conservation 

Practice Standard Code 632 or other applicable standards approved by the 

APCO, ARB, and EPA. Solid separator systems may include, but are not 

limited to, flat belt separators, roller press separators, vibrating screen 
REVISED PROPOSED October 21, 2010 

4570 - 7 Revised Proposed Rule 4570

separators, stationary inclined screen separators, weeping walls, and settling 

basins. 

3.60 Split-Sex Feeding Program: a feeding program that separates male and female 

swine after they are moved from the nursery and feed different diets to more 

closely match the nutrient requirements of the different sexes.

3.61 Steam-Flaked Cereal Grains: cereal grain that is processed by cooking the grain 

with steam under pressure and then flaking the resulting material through heated 

rollers.

3.62 Steam-Flaked Corn: corn that is processed by cooking the corn with steam 

under pressure and then flaking the resulting material through heated rollers.

3.63 3.44 Storage Pond: a basin constructed, maintained, and operated, to store animal 

waste manure, after it has been treated or processed in a lagoon. 

3.64 Swine: for the purposes of this rule, and determination of the threshold in Table 

2, any weaned pig of at least forty-five (45) pounds in weight, such as finishing 

pigs and breeding stock.

3.65 3.45 USDA: the United States Department of Agriculture or any person 

designated to act on its behalf. 

3.66 3.46 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. 

3.67 3.47 Volatile Organic Compounds (VOC): as defined in Rule 1020 (Definitions). 

3.68 3.48 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 the applicable standards in NRCS California Field Office 

Technical Guide (FOTG) Conservation Practice Standard Codes 313 or other 

applicable standards approved by the ARB, APCO, and EPA. 

3.68 3.49 Year: any consecutive 365-day period. 
REVISED PROPOSED October 21, 2010 

4570 - 8 Revised Proposed Rule 4570

4.0 Exemptions 

4.1 Except for the recordkeeping requirements of Section 7.1.1.1, the provisions of this 

rule shall not apply to a CAF, which remains at all times below all of the regulatory 

thresholds in Table 2 1: 

Table 2 1- CAF Thresholds for Regulation

Livestock Category Regulatory Threshold 

Through (rule adoption date)

Regulatory Threshold

On and after (day after rule 

adoption date)

Dairy 1,000 milking cows 500 milking cows

Beef Feedlots 3,500 beef cattle 3,500 beef cattle

Other Cattle Facility 7,500 calves, heifers, or other 

cattle 

7,500 calves, heifers, or other 

cattle

Poultry Facilities 

Chicken 650,000 head 400,000 head

Duck 650,000 head 400,000 head

Turkey 100,000 head 100,000 head

Swine Facility 3,000 head 3,000 head

Horses Facility 3,000 head 3,000 head

Sheep and Goat 

Facilities 

15,000 head of sheep, goats, 

or any combination of the two 

15,000 head of sheep, goats, or 

any combination of the two

Any livestock facility 

not listed above 30,000 head 30,000 head

5.0 Requirements 

5.1 Permit Requirements: 

5.1.1 Owner/operators shall obtain a Permit-to-Operate for the facility.

5.1.2 A thirty-day (30) public noticing and commenting period shall be 

required for all large CAFs receiving their initial Permit-to-Operate or 

Authority-to-Construct. 

5.1.3 Facility Emission Mitigation Plan

The owner/operator shall submit a facility emission mitigation plan as 

part of the Permit-to-Operate application or Authority-to-Construct 

application. The mitigation plan shall contain the following information:

5.1.3.1 The name, business address, and phone number of the 

owners/operators responsible for the preparation and the 
REVISED PROPOSED October 21, 2010 

4570 - 9 Revised Proposed Rule 4570

implementation of the mitigation measures listed in the 

mitigation plan.

5.1.3.2 The signature of the owners/operators attesting to the accuracy 

of the information provided and adherence to implementing the 

activities specified in the mitigation plan at all times and the date 

that the application was signed.

5.1.3.3 A list of all mitigation measures chosen to comply with Rule 

4570 requirements.

5.1.3.3.1 The mitigation measures shall be chosen from the 

applicable portions of Sections 5.5 or 5.6.

5.1.3.3.2 The owner/operator of CAFs that are not a dairy, beef 

feedlot, other cattle, swine, or poultry operations shall 

submit a mitigation plan demonstrating facility-wide 

reductions of at least 30% or submit a mitigation plan 

that adheres to all of the requirements of Sections 5.5 

or 5.6, whichever section best fits the facility.

5.1.3.3.3 Owners/operators may substitute a mitigation measure 

from one section in the applicable table (Tables 3.1

through 4.6) for a mitigation measure in another 

section of the applicable table, provided it is 

demonstrated that the substitution would result in equal 

or greater emission reductions. Alternative mitigation 

measures must be approved prior to initial use. 

5.1.3.3.4 In lieu of compliance with Section 5.1.3.3.1, Section 

5.1.3.3.2, or Section 5.1.3.3.3, an owner/operator 

may demonstrate that facility-wide reductions are 

equal to that which the compliance with those sections 

would have achieved.

5.1.4 Facility Emission Inventory

The Permit-to-Operate application or Authority-to-Construct application shall 

include the following information, which is in addition to the facility emission 

mitigation plan:

5.1.4.1 The maximum number of animals at the facility in each 

production stage (facility capacity).
REVISED PROPOSED October 21, 2010 

4570 - 10 Revised Proposed Rule 4570

5.1.4.2 Any other information necessary for the District to prepare an 

emission inventory of all regulated air pollutants emitted from 

the facility, as determined by the APCO.

5.1.5 The approved mitigation measures from the facility’s mitigation plan will 

be listed on the Permit-to-Operate or Authority-to-Construct as permit 

conditions.

5.1.6 The District shall act upon the Authority to Construct application or 

Permit-to-Operate application within six (6) months of receiving a 

complete application.

5.2 Permit Renewal/Change

5.2.1 Renewal - The District shall review each plan/permit at least once every 

three (3) years and update to reflect changes in the operation and 

feasibility of mitigation measures.

5.2.2 Change to Permit – If a temporary suspension of one or more mitigation 

measure provided for in Section 5.4 continues beyond the allowed 

suspension period:

5.2.2.1 The owners/operators shall, within that allowed period, submit a 

new emission mitigation plan designating a mitigation measure to 

be implemented in lieu of the mitigation measure that was 

suspended; and

5.2.2.2 The owner/operator shall obtain approval of the amended 

mitigation plan from the APCO and EPA by submittal of an 

Authority-to-Construct application.

5.1 Owners/operators of any CAF shall submit, for approval by the APCO, a 

permit application for each Confined Animal Facility.

5.2 Owners/operators of any CAF shall include an emission mitigation plan within 

the permit application that lists the VOC mitigation measures that the facility 

will use to comply with all applicable requirements of Sections 5.6 through 

5.13.
REVISED PROPOSED October 21, 2010 

4570 - 11 Revised Proposed Rule 4570

5.3 Mitigation Measure Implementation

5.3 Owners/operators of any CAF shall implement all VOC emission mitigation 

measures, as contained in the permit application, on and after 365 days from the 

permit issuance date of issuance of either the Authority-to-Construct or the 

Permit-to-Operate, whichever is sooner. 

5.4 Temporary Suspension of Mitigation Measures

5.4 Notwithstanding Section 5.3, aAn owner/operator may temporarily suspend 

use of mitigation measure(s) provided all of the following requirements are met: 

5.4.1 It is determined by a licensed veterinarian, certified nutritionist, CDFA, 

or USDA that any mitigation measure being suspended is detrimental to 

animal health or necessary for the animal to molt, and a signed written 

copy of this determination shall be retained on-site and made available 

for inspection upon request,

5.4.2 The owner/operator notifies the District, within forty-eight (48) hours of 

the determination that the mitigation measure is being temporarily 

suspended; the specific health condition requiring the mitigation measure 

to be suspended; and the duration that the measure must be suspended 

for animal health reasons, 

5.4.3 The emission mitigation measure is not suspended for longer than 

recommended by the licensed veterinarian or certified nutritionist for 

animal health reasons, 

5.4.4 If such a situation exists, or is expected to exist for longer than thirty 

(30) days, the owners/operators shall, within that thirty (30) day period, 

submit a new emission mitigation plan designating a mitigation measure 

to be implemented in lieu of the mitigation measure that was suspended, 

and 

5.4.5 The APCO, ARB, and EPA approve the temporary suspension of the 

mitigation measure for the time period requested by the owner/operator 

and a signed written copy of this determination shall be retained on-site. 

5.5 Notwithstanding Sections 5.3 and 5.4, poultry CAF owners/operators may

temporarily suspend utilization of a feed mitigation measure(s) for poultry 

producing eggs for commercial purposes provided all of the following 

requirements are met:
REVISED PROPOSED October 21, 2010 

4570 - 12 Revised Proposed Rule 4570

5.5.1 It is determined by a certified nutritionist or licensed veterinarian that 

suspension of the mitigation measure is necessary for the animal to molt. 

5.5.2 The owners/operators notify the District, within forty-eight (48) hours of 

the determination that a measure is being temporarily suspended and the 

duration for which the measure must be suspended for the animal to 

molt, 

5.5.3 If such a situation exists, or is expected to exist for longer than twenty 

(20) days, the owners/operators shall, within that twenty (20) day period, 

submit a new emission mitigation plan designating a mitigation measure 

to be implemented in lieu of the mitigation measure that was suspended, 

5.5.4 The emission mitigation measure is not suspended for longer than 

recommended by the licensed veterinarian or certified nutritionist for the 

animal to molt, and 

5.5.5 The APCO, ARB, and EPA approve the temporary suspension of the 

mitigation measure for the time period requested by the owner/operator. 

5.5 Phase I Mitigation Measures: Owners/operators of large CAFs shall comply 

with the following Phase I Mitigation Measures in Section 5.5 until compliance 

with all applicable Phase II Mitigation Measures in Section 5.6 is demonstrated 

in accordance with the compliance schedule in Section 8.0.
REVISED PROPOSED October 21, 2010 

4570 - 13 Revised Proposed Rule 4570

5.5.1 5.6 Dairy CAF: Owners/operators of a large Dairy CAF shall also

comply with the following applicable Phase I requirements in Table 3.1:

Table 3.1 2 –Large Dairy CAF Phase I Mitigation Measure Requirements

A. Owners/operators shall incorporate at least four (4) of the following feed mitigation 

measures: 

Class One Mitigation Measures 

1. a. Feed according to National Research Council (NRC) guidelines. 

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

corn. 

3. a. At least once every fourteen (14) days remove feed from the area where animals stand 

to eat feed. 

4. a. At least once every fourteen (14) days remove spilled feed from the area where 

equipment travels to place feed in the feed bunk. 

5. a. Remove uneaten wet feed from feed bunks within twenty-four (24) hours of a rain 

event. 

6. a. Feed or dispose of rations within forty-eight (48) hours of grinding and mixing 

rations. 

7. a. Store grain in a weatherproof storage structure from October through May. 

8. a. Implement an alternative mitigation measure(s), not listed above. 

B. Owners/operators shall incorporate at least one (1) of the following feed mitigation 

measures: 

Class One Mitigation Measures 

1. a. Cover the horizontal surface of silage piles, except for the area where feed is being 

removed from the pile. 

2. a. Collect leachate from the silage piles and send it to a waste treatment system such as a 

lagoon at least once every twenty-four (24) hours. 

3. a. Implement an alternative mitigation measure(s), not listed above. 

Class Two Mitigation Measures 

4. 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. 

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 14 Revised Proposed Rule 4570

Table 3.1 2 –Large Dairy CAF Phase I Mitigation Measure Requirements (continued) 

C. Owners/operators shall incorporate at least one (1) of the following mitigation measures in 

each milk parlor: 

Class One Mitigation Measures 

1. a. Flush or hose milk parlor immediately prior to, immediately after, or during each 

milking. 

2. a. Implement an alternative mitigation measure(s), not listed above. 

Class Two Mitigation Measures 

3. a. 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. Owners/operators housing animals in freestalls shall incorporate at least two (2) of the 

following mitigation measures in each freestall barn: 

Class One Mitigation Measures 

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

during each milking. 

2. a. Inspect water pipes and troughs and repair leaks at least once every fourteen (14) 

days. 

3. a. Use non- animal waste manure -based bedding and non-separated solids based bedding 

for at least 90% of the bedding material, by weight, for freestalls (e.g. rubber mats, 

almond hulls, sand, or waterbeds). 

4. a. Remove animal waste manure that is not dry from individual cow freestall beds at 

least once every fourteen (14) days. 

5. a. Rake, harrow, scrape, or grade bedding in freestalls at least once every fourteen (14) 

days. 

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

animal waste manure handling system, such as a flush system. 

7. a. Have no animals in exercise pens, corrals, or drylots at any time. 

8. a. Flush freestalls more frequently than the milking schedule. 

9. a. Implement an alternative mitigation measure(s), not listed above. 

Class Two Mitigation Measures 

10. a. Vacuum animal waste manure instead of flushing or scraping and apply animal waste

manure directly to land either through injection or incorporation within seventy-two 

hours of removal from animal housing or vacuum truck. 

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 15 Revised Proposed Rule 4570

Table 3.1 2 –Large Dairy CAF Phase I Mitigation Measures Requirements (continued)

E. Owners/operators housing animals in corrals shall incorporate at least six (6) of the 

following mitigation measures in each corral where animals have been housed in the last 

thirty (30) days: 

Class One Mitigation Measures 

1. a. Clean animal waste manure from corrals at least four (4) times per year with at least 

sixty (60) days between cleaning, or 

b. Clean corrals at least once between April and July and at least once between October 

and December, or 

c. Clean concreted areas such that the depth of animal waste manure does not exceed 

twelve (12) inches at any point or time, except for in-corral mounding. 

2. a. Manage corrals such that the animal waste manure depth in the corral does not exceed 

twelve (12) inches at any time or point, except for in-corral mounding. 

3. a. Knockdown fence line animal waste manure build-up prior to it exceeding a height of 

twelve (12) inches at any time or point. 

4. a. Scrape or flush feed aprons in corrals at least once every seven (7) days. 

5. a. Slope the surface of the pens at least 3% where the available space for each animal is 

400 square feet or less. Slope the surface of the pens at least 1.5% where the available 

space for each animal is more than 400 square feet per animal. 

6. a. Maintain corrals to ensure drainage and prevent water from standing more than fortyeight (48) hours after a storm, or 

b. Maintain corrals and drylots so that there are not indentions in the surface where 

puddles may form and remain for more than forty-eight (48) hours. 

7. a. Install floats on the troughs or use another method approved by the APCO, ARB, and 

EPA to ensure that the water in the troughs does not intentionally or unintentionally 

overflow or spill onto an earthen ground. 

8. a. Inspect water pipes and troughs and repair leaks at least once every fourteen (14) 

days. 

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

10. 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. a. Implement an alternative mitigation measure(s), not listed above. 

Class Two Mitigation Measures 

12. a. Use lime or a similar absorbent material in the pens according to the manufacturer's 

recommendations to minimize moisture in the pens, or 

b. Apply thymol to corral soil in accordance with the manufacturer's recommendation. 

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

capture and VOC control efficiency of at least 80%. 

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 16 Revised Proposed Rule 4570

Table 3.1 2 –Large Dairy CAF Phase I Mitigation Measures Requirements (continued)

F. Owners/operators that handle or store solid animal waste manure or separated solids 

outside the animal housing shall incorporate at least two (2) of the following mitigation 

measures: 

Class One Mitigation Measures 

1. a. Cover dry animal waste manure piles outside the pens with a weatherproof covering 

from October through May, except for times, not to exceed twenty-four (24) hours per 

event, when wind events remove the covering. 

2. a. Cover dry separated solids outside the pens with a weatherproof covering from 

October through May, except for times, not to exceed twenty-four (24) hours per 

event, when wind events remove the covering. 

3. a. Remove animal waste manure from the facility within seventy-two (72) hours of 

removal from the pens or corrals. 

4. a. Remove separated solids from the facility within seventy-two (72) hours of separation 

with a solid separation system, or 

b. Store no separated solids outside of anaerobic digesters or aerobic digesters. 

5. a. Implement an alternative mitigation measure(s), not listed above. 

Class Two Mitigation Measures 

6. a. Compost animal waste manure removed from pens with an aerated static pile vented to 

a VOC control device with an overall VOC capture and VOC control efficiency of at 

least 80%. 

7. a. Store all removed animal waste manure in an enclosure vented to a VOC control 

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

8. a. Send at least 51% of the animal waste manure removed from animal housing to a 

digester, with a VOC control device with an overall VOC capture and VOC control 

efficiency of at least 80%.

G. Owners/operators that handle animal waste manure in a liquid form shall incorporate at 

least one (1) of the following mitigation measures: 

Class One Mitigation Measures 

1. a. Manage the facility such that there are no lagoons, as defined in Section 3.29 3.30, at 

the facility. 

2. a. Use phototrophic lagoon, or 

b. Use an anaerobic treatment lagoon that is not mechanically aerated. 

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

entering the lagoon. 

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

5. a. Implement an alternative mitigation measure(s), not listed above. 
REVISED PROPOSED October 21, 2010 

4570 - 17 Revised Proposed Rule 4570

Table 3.1 2 –Large Dairy CAF Phase I Mitigation Measures Requirements (continued)

Class Two Mitigation Measures 

6. a. Use an aerobic lagoon, or 

b. Use an anaerobic treatment lagoon that is mechanically aerated. 

7. a. Maintain organic loading in the lagoon such that the total solids is less than 3.5 mg 

(dry weight)/mL, or total volatile solids is less than 3.5 mg/mL. 

8. a. 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 that is approved by the 

APCO, ARB, and EPA. 

9. a. 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. Owners/operators who land apply dry or liquid animal waste manure to crop land on the 

facility shall incorporate at least two (2) of the following mitigation measures: 

Class One Mitigation Measures 

1. a. Land incorporate all solid animal waste manure within seventy-two (72) hours of 

removal from animal housing. 

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

anaerobic or aerobic lagoon or digester system. 

3. a. Allow liquid animal waste manure to stand in the fields no more than twenty-four (24) 

hours after irrigation, or 

b. Apply no liquid animal waste manure. 

4. a. Apply no solid animal waste manure with a moisture content of more than 50%, or 

b. Apply no solid animal waste manure. 

5. a. Implement an alternative mitigation measure(s), not listed above. 
REVISED PROPOSED October 21, 2010 

4570 - 18 Revised Proposed Rule 4570

5.5.2 5.7Beef Feedlots: Owners/operators of a large CAF that is a Beef 

Feedlot shall also comply with the following applicable Phase I 

requirements in Table 3.2: 

Table 3.2 - Beef Feedlot Phase I Mitigation Measure Requirements 

A. Owners/operators shall incorporate at least five (5) of the following feed mitigation 

measures: 

Class One Mitigation Measures 

1. a. Feed according to National Research Council (NRC) guidelines. 

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

rolled corn. 

3. a. At least once every fourteen (14) days remove feed from the area where animals stand 

to eat. 

4. a. At least once every fourteen (14) days remove spilled feed from the area where 

equipment travels to place feed in the feed bunk. 

5. a. Remove uneaten wet feed from feed bunks within twenty-four (24) hours of a rain 

event. 

6. a. Feed or dispose of rations within forty-eight (48) hour of grinding and mixing rations. 

7. a. Store grain in a weatherproof storage structure from October through May. 

8. a. Implement an alternative mitigation measure(s), not listed above. 

B. Owners/operators shall incorporate at least one (1) of the following feed mitigation 

measures: 

1. a. Cover the horizontal surface of silage piles, except for the area where feed is being 

removed from the pile. 

2. a. Collect leachate from the silage piles and send it to a waste treatment system, such as 

a lagoon, at least once every twenty-four (24) hours. 

3. a. Implement an alternative mitigation measure(s) not listed above. 

Class Two Mitigation Measures 

4. 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. 

Continues on next page
REVISED PROPOSED October 21, 2010 

4570 - 19 Revised Proposed Rule 4570

Table 3.2 - Beef Feedlot Phase I Mitigation Measure Requirements (continued) 

C. Owners/operators shall incorporate at least seven (7) of the following mitigation measures in 

each of the animal housing structures (e.g. each corral, pen, etc.): 

Class One Mitigation Measures 

1. a. Clean animal waste manure from pens at least once between April and July and at 

least once between October and December of each year. 

2. a. Manage pens such that the animal waste manure depth in the pen does not exceed 

eighteen (18) inches at any time or point, except for in-corral mounds. 

3. a. Knockdown fence line animal waste manure build-up prior to it exceeding a height of 

twelve (12) inches at any time or point. 

4. a. Slope the surface of the pens at least 3% where the available space for each animal is 

400 square feet or less. Slope the surface of the pens at least 1.5% where the 

available space for each animal is more than 400 square feet per animal. 

5. a. Maintain pens to ensure drainage and prevent water from standing more than fortyeight (48) hours after a storm, or 

b. Prior to placing cattle in pens, scrape or smooth the pen floors such that there are not 

indentions where puddles may form and remain for more than forty-eight (48) hours. 

6. a. Install floats on the troughs or use another method approved by the APCO, ARB, and 

EPA to ensure that the water in the troughs does not intentionally or unintentionally 

overflow or spill onto an earthen ground. 

7. a. Inspect water pipes and troughs and repair leaks at least once every fourteen (14) 

days. 

8. a. Harrow, rake, or scrape pens sufficiently to maintain a dry surface, unless the corrals 

have not held animals in the last thirty (30) days. 

9. a. Clean the area where the animals stand to consume feed such that the depth of animal 

waste manure in this area does not exceed twelve (12) inches at any time or point. 

10. a. Use a dry animal waste manure handling system, such as scraping, instead of a liquid 

animal waste manure handling system, such as a flush system. 

11. 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 shade structures such that situated so that they are uphill of any slope in the 

corral. 

12. a. Implement an alternative mitigation measure(s), not listed above. 

Class Two Mitigation Measures 

13. a. Use lime or a similar absorbent material in the pens according to the manufacturer's 

recommendation to minimize moisture in the pens, or 

b. Apply thymol to the feedlot soil in accordance with the manufacturer's 

recommendation. 

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 20 Revised Proposed Rule 4570

Table 3.2 - Beef Feedlot Phase I Mitigation Measure Requirements (continued) 

D. Owners/operators that handle or store solid animal wastemanure or separated solids outside 

the animal housing shall incorporate at least one (1) of the following mitigation measures: 

Class One Mitigation Measures 

1. a. Cover dry animal waste manure piles outside the pens with a weatherproof covering 

from October through May, except for times, not to exceed twenty-four (24) hours per 

event, when wind events remove the covering, or 

b. Store no dry animal waste manure piles outside the pens from October through May. 

2. a. Remove animal waste manure from the facility within seventy-two (72) hours of 

removal from the pens. 

3. a. Implement an alternative mitigation measure(s), not listed above. 

Class Two Mitigation Measures 

4. a. Compost animal waste manure removed from pens with an aerated static pile vented to 

a VOC control device with an overall VOC capture and VOC control efficiency of at 

least 80%. 

5. a. Store all removed animal waste manure in an enclosure vented to a VOC control 

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

6. a. Send at least 51% of the animal waste manure removed from the animal housing to a 

digester, with a VOC control device with an overall VOC capture and VOC control 

efficiency of at least 80%. 

7. a. Use a slatted floor system (slatted floors over deep pits or shallow flush alleys), with 

daily animal waste manure removal. 

E. Owners/operators that handle animal waste manure in a liquid form shall incorporate at 

least one (1) of the following mitigation measures: 

Class One Mitigation Measures 

1. a. Manage the facility such that there are no lagoons, as defined in Section 3.293.30, at 

the facility. 

2. a. Use phototrophic lagoon, or 

b. Use an anaerobic treatment lagoon that is not mechanically aerated. 

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

stream entering the lagoon. 

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

5. a. Implement an alternative mitigation measure(s), not listed above. 

Continues on next page
REVISED PROPOSED October 21, 2010 

4570 - 21 Revised Proposed Rule 4570

Table 3.2 - Beef Feedlot Phase I Mitigation Measure Requirements (continued) 

Class Two Mitigation Measures 

6. a. Use an aerobic lagoon, or 

b. Use an anaerobic treatment lagoon that is mechanically aerated. 

7. a. Maintain organic loading in the lagoon that is less than 3.5 mg (dry weight)/mL, or 

total volatile solids is less than 3.5 mg/mL. 

8. a. 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 that is approved by the 

APCO, ARB, and EPA. 

9. a. Cover the lagoon and vent to a VOC control device with an overall VOC capture and 

VOC control efficiency of at least 80%. 

F. Owners/operators who land apply dry or liquid animal waste manure to crop land on the 

facility shall incorporate at least (2) two of the following mitigation measures: 

Class One Mitigation Measures 

1. a. Land incorporate all animal waste manure within seventy-two (72) hours of removal 

from animal housing. 

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

anaerobic or aerobic lagoon or digester system. 

3. a. Allow liquid animal waste manure to stand in the fields no more than twenty-four (24) 

hours after irrigation, or 

b. Apply no liquid animal waste manure. 

4. a. Apply no solid animal waste manure with a moisture content of more than 50%, or 

b. Apply no solid animal waste manure. 

5. a. Implement an alternative mitigation measure(s), not listed above. 
REVISED PROPOSED October 21, 2010 

4570 - 22 Revised Proposed Rule 4570

5.5.3 5.8Other Cattle CAF: Owners/operators of a large CAF that is an Other 

Cattle Facility shall also comply with the following applicable Phase I 

requirements in Table 3.3: 

Table 3.34 –Other Cattle Phase I Mitigation Measure Requirements 

A. Owners/operators shall incorporate at least five (5) of the following feed and silage 

mitigation measures: 

Class One Mitigation Measures 

1. a. Feed according to National Research Council (NRC) guidelines. 

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

rolled corn. 

3. a. At least once every fourteen (14) days remove feed from the area where animals stand 

to eat feed. 

4. a. At least once every fourteen (14) days remove spilled feed from the area where 

equipment travels to place feed in the feed bunk. 

5. a. Remove uneaten wet feed from feed bunks within twenty-four (24) hours of a rain 

event. 

6. a. Feed or dispose of rations within forty-eight (48) hour of grinding and mixing rations. 

7. a. Store grain in a weatherproof storage structure from October through May. 

8. a. Implement an alternative mitigation measure(s), not listed above. 

B. Owners/operators shall incorporate at least one (1) of the following feed mitigation 

measures: 

Class One Mitigation Measures 

1. a. Cover the horizontal surface of silage piles, except for the area where feed is being 

removed from the pile. 

2. a. Collect leachate from the silage piles and send it to a waste treatment system such as a 

lagoon at least once every twenty-four (24) hours. 

3. a. Implement an alternative mitigation measure(s), not listed above. 

Class Two Mitigation Measures 

4. 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. 

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 23 Revised Proposed Rule 4570

Table 3.34 –Other Cattle Phase I Mitigation Measure Requirements (continued) 

C. Owners/operators shall incorporate at least seven (7) of the following mitigation measures 

in each animal housing structure (e.g. corral, freestalls, pens, etc.): 

Class One Mitigation Measures 

1. a. Vacuum, scrape, or flush freestalls at least once every fourteen (14) days (only applies 

to facilities with freestalls). 

2. a. Inspect water pipes and troughs and repair leaks at least once every fourteen (14) 

days. 

3. a. Use non- animal waste manure -based bedding and non-separated solids based bedding 

for at least 90% of the bedding material, by weight, for freestalls (e.g. rubber mats, 

almond hulls, sand, or waterbeds). 

4. a. Remove animal waste manure that is not dry from individual cow freestall beds daily 

(only applies to facilities with freestalls). 

5. a. Rake, harrow, scrape, or grade bedding in freestalls at least once every fourteen (14) 

days (only applies to facilities with freestalls). 

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

animal waste manure handling system such as flushing. 

7. a. Have no animals in exercise pens, corrals, or drylots at any time. 

8. a. Clean animal waste manure from corrals and pens at least once between April and July 

and at least once between October and December of each year. 

9. a. Manage pens such that the animal waste manure depth in the pen does not exceed 

eighteen (18) inches at any time or point, except for in-corral mounds. 

10. a. Knockdown fence line animal waste manure build-up prior to it exceeding a height of 

twelve (12) inches at any time or point. 

11. a. Scrape or flush feed aprons in all corrals at least once every seven (7) days. 

12. a. Slope the surface of the pens at least 3% where the available space for each animal is 

400 square feet or less. Slope the surface of the pens at least 1.5% where the 

available space for each animal is more than 400 square feet per animal. 

13. a. Maintain pens and corrals to ensure drainage and prevent water from standing more 

than forty-eight (48) hours after a storm, or 

b. Prior to placing cattle in pens or corrals, scrape or smooth the pen floors such that 

there are not indentions where puddles may form and remain for over forty-eight (48) 

hours. 

14. a. Install floats on the troughs or use another method approved by the APCO, ARB, and 

EPA to ensure that the water in the troughs does not intentionally or unintentionally 

overflow or spill onto the earthen ground. 

15. a. Harrow, rake, or scrape pens and corrals sufficiently to maintain a dry surface, unless 

the pens have not held animals in the last thirty (30) days. 

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 24 Revised Proposed Rule 4570

Table 3.34 –Other Cattle Phase I Mitigation Measure Requirements (continued) 

16. a. Clean the area where the animals stand to consume feed such that the depth of animal 

waste manure does not exceed twelve (12) inches at any time or point. 

17. a. Use a dry animal waste manure handling system, such as scraping, instead of a liquid 

animal waste manure handling system such as a flush system. 

18. 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 shade structures such that situated so that they are uphill of any slope in the 

corral. 

19. a. Implement an alternative mitigation measure(s), not listed above. 

Class Two Mitigation Measures 

20. a. Vacuum animal waste manure instead of flushing or scraping and apply animal waste

manure directly to land either through injection or incorporation. 

21. a. Use lime or a similar absorbent material in the pens and corrals according to the 

manufacturer's recommendations to minimize moisture in the pens, or 

b. Apply thymol to the pen and corral soil in accordance with the manufacturer's 

recommendation. 

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

capture and VOC control efficiency of at least 80%. 

D. Owners/operators that handle or store solid animal waste manure or separated solids 

outside the animal housing shall incorporate at least one (1) of the following mitigation 

measures: 

Class One Mitigation Measures 

1. a. Cover dry animal waste manure piles outside the pens with a weatherproof covering 

from October through May, except for times, not to exceed twenty-four (24) hours per 

event, when wind events remove the covering, or 

b. Store no dry animal waste manure piles outside of animal housing from October 

through May. 

2. a. Remove animal waste manure from the facility within seventy-two (72) hours of 

removal from the pens. 

3. a. Implement an alternative mitigation measure(s), not listed above. 

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 25 Revised Proposed Rule 4570

Table 3.34 –Other Cattle Phase I Mitigation Measure Requirements (continued) 

Class Two Mitigation Measures 

4. a. Compost animal waste manure removed from pens with an aerated static pile vented to 

a VOC control device with an overall VOC capture and VOC control efficiency of at 

least 80%. 

5. a. Store all removed animal waste manure in an enclosure vented to a VOC control 

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

6. a. Send at least 51% of the animal waste manure removed from the animal housing to a 

digester with a VOC control device with an overall VOC capture and VOC control 

efficiency of at least 80%. 

7. a. Use a slatted floor system (slatted floors over deep pits or shallow flush alleys), with 

daily animal waste manure removal. 

E. Owners/operators that handle animal waste manure in a liquid form shall incorporate at 

least one (1) of the following mitigation measures: 

Class One Mitigation Measures 

1. a. Manage the facility such that there are no lagoons, as defined in Section 3.293.30, at 

the facility. 

2. a. Use phototrophic lagoon, or 

b. Use an anaerobic treatment lagoon that is not mechanically aerated. 

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

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

5. a. Implement an alternative mitigation measure(s), not listed above. 

Class Two Mitigation Measures 

6. a. Use an aerobic lagoon, or 

b. Use an anaerobic treatment lagoon that is mechanically aerated. 

7. a. Maintain organic loading in the lagoon that is less than 3.5 mg (dry weight)/mL, or 

total volatile solids is less than 3.5 mg/mL. 

8. a. 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 that is approved by the 

APCO, ARB, and EPA. 

9. a. Cover the lagoon and vent to a VOC control device with an overall VOC capture and 

VOC control efficiency of at least 80%. 

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 26 Revised Proposed Rule 4570

Table 3.34 –Other Cattle Phase I Mitigation Measure Requirements (continued) 

F. Owners/operators who land apply dry or liquid animal waste manure to crop land on the 

facility shall incorporate at least (2) two of the following mitigation measures: 

Class One Mitigation Measures 

1. a. Land incorporate all animal waste manure within seventy-two (72) hours of removal 

from animal housing. 

2. a. Only apply animal waste manure that has been treated with an anaerobic or aerobic 

lagoon or digester system. 

3. a. Allow liquid manure to stand in the fields no more than twenty-four (24) hours after 

irrigation, or 

b. Apply no liquid animal waste manure. 

4. a. Apply no solid animal waste manure with a moisture content of more than 50%, or 

b. Apply no solid animal waste manure. 

5. a. Implement an alternative mitigation measure(s), not listed above. 
REVISED PROPOSED October 21, 2010 

4570 - 27 Revised Proposed Rule 4570

5.5.4 5.9Swine CAF: Owners/operators of a Large CAF that is a Swine 

Facility shall also comply with the following applicable Phase I 

requirements in Table 3.4: 

Table 3.45–Swine Phase I Mitigation Measure Requirements 

A. Owners/operators shall incorporate at least five (5) of the following feed and silage 

mitigation measures: 

Class One Mitigation Measures 

1. a. Feed according to National Research Council (NRC) guidelines. 

2. a. Feed animals probiotics designed to improve digestion according to manufacturer 

recommendations. 

3. a. Feed animals at least 5% cellulose. 

4. a. Feed animals a casein based diet. 

5. a. Feed animals an amino acid-supplemented diet with 2% sucrose thermal 

oligosaccharide caramel. 

6. a. Feed animals a diet with no more than ten percent (10%) crude protein with 

supplemented lysine, threonine, tryptophan, and methionine. 

7. a. Feed animals 10 ppm anthraquinone. 

8. a. Remove spilled from the facility at least once every fourteen (14) days. 

9. a. Remove uneaten wet feed from the housing within twenty-four (24) hours of a rain 

event. 

10. a. Feed or dispose of rations within forty-eight (48) hour of grinding and mixing rations. 

11. a. Store grain in a weatherproof storage structure from October through May. 

12. a. Implement an alternative mitigation measure(s), not listed above. 

B. Owners/operators shall incorporate at least five (5) of the following mitigation measures in 

each animal housing unit: 

Class One Mitigation Measures 

1. a. Clean animal waste manure from the housing at least twice every fourteen (14) days. 

2. a. Manage pens such that the animal waste manure depth in the pen does not exceed 

eighteen (18) inches at any time or point. 

3. a. Slope the surface of the pens at least 3% where the available space for each animal is 

400 square feet or less. Slope the surface of the pens at least 1.5% where the 

available space for each animal is more than 400 square feet per animal. 

4. a. Install floats on the troughs or use drinkers that do not drip or another method 

approved by the APCO, ARB, and EPA to ensure that the water in the troughs does 

not intentionally or unintentionally overflow or spill onto an earthen ground. 

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 28 Revised Proposed Rule 4570

Table 3.45–Swine Phase I Mitigation Measure Requirements (continued) 

5. a. Inspect water pipes and troughs and repair leaks at least once every fourteen (14) 

days. 

6. a. Use a slatted floor system (slatted floors over deep pits or shallow flush alleys), with 

daily animal waste manure removal. 

7. a. Implement an alternative mitigation measure(s), not listed above. 

Class Two Mitigation Measures 

8. a. Use lime or a similar absorbent material in the pens according to the manufacturer's 

recommendations to minimize moisture in the pens. 

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

capture and VOC control efficiency of at least 80% 

10. a. House animals in a tunnel ventilated house with mechanical ventilation. 

C. Owners/operators that handle or store solid animal waste manure or separated solids 

outside the animal housing shall incorporate at least one (1) of the following mitigation 

measures: 

Class One Mitigation Measures 

1. a. Cover dry animal waste manure and separated solids outside the pens with a 

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

twenty-four (24) hours per event, when wind events remove the covering. 

2. a. Remove animal waste manure from the facility within seventy-two (72) hours of 

removal from the pens or corrals. 

3. a. Use a dry animal waste manure handling system, such as stockpiles or solid land 

application, instead of a liquid system such as a flush system. 

4. a. Implement an alternative mitigation measure(s), not listed above. 

Class Two Mitigation Measures 

5. a. Compost animal waste manure removed from pens 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. a. Store all removed animal waste manure in an enclosure vented to a VOC control 

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

7. a. Send at least 51% of the animal waste manure removed from site to a digester with a 

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

least 80% control efficiency. 

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 29 Revised Proposed Rule 4570

Table 3.45–Swine Phase I Mitigation Measure Requirements (continued)

D. Owners/operators that handle animal waste manure in a liquid form shall incorporate at 

least one (1) of the following mitigation measures: 

Class One Mitigation Measures 

1. a. Manage the facility such that there are no lagoons, as defined in Section 3.293.30, at 

the facility. 

2. a. Use phototrophic lagoon, or 

b. Use an anaerobic treatment lagoon. 

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

entering the lagoon. 

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

5. a. Implement an alternative mitigation measure(s), not listed above. 

Class Two Mitigation Measures 

6. a. Use an aerobic lagoon, or 

b. Use a mechanically aerated lagoon. 

7. a. Maintain organic loading in the lagoon that is less than 3.5 mg (dry weight)/mL, or 

total volatile solids is less than 3.5 mg/mL. 

8. a. 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 that is approved by the 

APCO, ARB, and EPA. 

9. a. Cover the lagoon and vent to a VOC control device with an overall VOC capture and 

VOC control efficiency of at least 80%. 

E. Owners/operators who land apply dry or liquid animal waste manure to crop land on the 

facility shall incorporate at least (2) two of the following mitigation measures: 

Class One Mitigation Measures 

1. a. Land incorporate all solid animal waste manure within seventy-two (72) hours of 

removal from animal housing, or 

2. a. Only apply animal waste manure that has been treated with an anaerobic or aerobic 

lagoon or digester system. 

3. a. Allow liquid animal waste manure to stand in the fields no more than twenty-four (24) 

hours after irrigation, or 

b. Apply no liquid animal waste manure. 

4. a. Apply no solid animal waste manure with a moisture content of more than 50%, or 

b. Apply no solid animal waste manure. 

5. a. Implement an alternative mitigation measure(s), not listed above. 
REVISED PROPOSED October 21, 2010 

4570 - 30 Revised Proposed Rule 4570

5.5.5 5.10Poultry CAF: Owners/operators of a large CAF that is a Poultry 

Facility shall also comply with the following applicable Phase I 

requirements in Table 3.5: 

Table 3.56–Poultry Phase I Mitigation Measure Requirements

A. Owners/operators shall incorporate at least five (5) of the following feed mitigation 

measures: 

Class One Mitigation Measures 

1. a. Feed according to NRC guidelines. 

2. a. Feed animals probiotics designed to improve digestion according to manufacturer 

recommendations, or 

3. a. Feed animals an amino acid-supplemented diet to meet their nutrient requirements, or 

4. a. Feed animals feed additives such as amylase, xylanase, and protease, designed to 

maximize digestive efficiency according to manufacturer recommendations. 

5. a. Remove spilled feed from housing at least once every seven (7) days. 

6. a. Enclose grain in a weatherproof storage structure from October through May. 

7. a. Feed or dispose of feed within forty-eight (48) hour of grinding and mixing feed. 

8. a. Use feed additives designed to reduce feed decomposition or oxidization (the process 

were one or more electrons are removed from a molecule). 

9. a. Remove uneaten wet feed from the housing within twenty-four (24) hours of a rain 

event. 

10. a. Implement an alternative mitigation measure(s), not listed above. 

B. Each poultry house shall incorporate at least four (4) of the following mitigation measures: 

Class One Mitigation Measures 

1. a. Remove caked animal waste manure/litter at least once every fourteen (14) days. 

2. a. Clean under poultry cages at least once every fourteen (14) days. 

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

required for animal health or biosecurity issues. 

5. a. Use drinkers that do not drip. 

6. a. Adjust the height, volume, and location of drinkers at least once every fourteen (14) 

days. 

7. a. Use no foggers in the house. 

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 31 Revised Proposed Rule 4570

Table 3.56–Poultry Phase I Mitigation Measure Requirements (continued) 

8. a. 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. a. Slope the surface of the house at least 3% where the available space for each animal is 

400 square feet or less. Slope the surface of the house at least 1.5% where the 

available space for each animal is more than 400 square feet per animal. 

10. a. Install mounds or berms up gradient to prevent the runoff of stormwater into pens 

(only an option for animals allowed to freely move between indoor housing structures 

and outdoor pens). 

11. a. Inspect water pipes and drinkers and repair leaks at least once every fourteen (14) 

days. 

12. a. Maintain the roof structure and manage roof runoff in accordance with the applicable 

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

standards approved by the APCO, ARB, and EPA 

13. a. Implement an alternative mitigation measure(s), not listed above. 

Class Two Mitigation Measures 

14. a. Vent housing to a VOC control device with an overall VOC capture and VOC control 

efficiency of at least 80%. 

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

16. a. House animals in a tunnel ventilated houses with mechanical ventilation. 

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

C. Owners/operators that handle or store solid animal waste manure/litter or separated solids 

outside the animal housing shall incorporate at least one (1) of the following mitigation 

measures: 

Class One Mitigation Measures 

1. a. Remove all animal waste manure/litter from the facility within seventy-two (72) hours 

of removal from housing, or 

b. Send all animal waste manure/litter to a lagoon within seventy-two (72) hours of 

removal from housing. 

2. a. Cover animal waste manure/litter outside the housing with a weatherproof covering 

from October through May, except for times, not to exceed twenty-four (24) hours per 

event, when wind events remove the covering. 

3. a. Use a solid animal waste manure/litter handling system in housing, such as stockpiles, 

solid land application, or a thin bed animal waste manure/litter drying system, instead 

of a liquid system such as flushing, animal wastemanure/litter storage ponds, or 

animal waste manure/litter treatment lagoons. 

4. a. Implement an alternative mitigation measure(s), not listed above. 

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 32 Revised Proposed Rule 4570

Table 3.56–Poultry Phase I Mitigation Measure Requirements (continued)

Class Two Mitigation Measures 

6. a. Send at least 51% of the animal waste manure/litter removed from site to a digester, 

with a VOC control device with an overall VOC capture and VOC control efficiency 

of at least 80%. 

7. a. Compost animal waste manure/litter removed from the 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. Owners/operators that handle animal waste manure/litter in a liquid form shall incorporate 

at least one (1) of the following mitigation measures: 

Class One Mitigation Measures 

1. a. Manage the facility such that there are no lagoons, as defined in Section 3.293.30, at 

the facility. 

2. a. Use phototrophic lagoon, or 

b. Use an anaerobic treatment lagoon. 

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

entering the lagoon. 

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

5. a. Implement an alternative mitigation measure(s), not listed above. 

Class Two Mitigation Measures 

6. a. Use an aerobic lagoon, or 

b. Use a mechanically aerated lagoon. 

7. a. Maintain organic loading in the lagoon that is less than 3.5 mg (dry weight)/mL, or 

total volatile solids is less than 3.5 mg/mL. 

8. a. 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 

APCO, ARB, and EPA. 

9. a. 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%. 
REVISED PROPOSED October 21, 2010 

4570 - 33 Revised Proposed Rule 4570

5.6 Phase II Mitigation Measures: Owners/operators of CAFs subject to the 

regulatory threshold in Table 2 shall comply with all applicable Phase II 

Mitigation Measures in accordance with the compliance schedule in Section 8.0.

5.6.1 Dairy CAF: An owner/operator of a medium or large Dairy CAF shall 

comply with the Phase II mitigation measures in Table 4.1.

Table 4.1 – Dairy CAF Phase II Mitigation Measure Requirements

A. Feed:

 An owner/operator of a dairy CAF shall implement mitigation measures 1, 2, 3, and 4

and at least one (1) additional mitigation measure:

1. Feed according to National Research Council (NRC) guidelines.

2. Push feed so that it is within three (3) feet of feedlane fence within two hours of putting 

out the feed or use a feed trough or other feeding structure designed to maintain feed 

within reach of the cows. 

3. Begin feeding total mixed rations within two (2) hours of grinding and mixing rations.

4. Store grain in a weatherproof storage structure or under a weatherproof covering from 

October through May.

5. Feed steam-flaked, dry rolled, cracked or ground corn or other steam-flaked, dry rolled, 

cracked or ground cereal grains.

6. Remove uneaten wet feed from feed bunks within twenty-four (24) hours after the end of 

a rain event.

7. For total mixed rations that contain at least 30% by weight of silage, feed animals total 

mixed rations that contain at least 45% moisture.

8. Implement an alternative mitigation measure(s), not listed above. 

B. Silage:

 An owner/operator of a dairy CAF that feeds silage shall implement at least one (1) of the 

following silage mitigation measures:

1. Operators selecting this option must choose mitigation measure 1a plus one (1) from 

mitigation measures 1b, 1c, 1d plus two (2) from mitigation measures 1e, 1f, 1g:

a. Cover the surface of silage piles, except for the area where feed is being removed 

from the pile, with a plastic tarp that is at least five (5) mils thick (0.005 inches), 

multiple plastic tarps with a cumulative thickness of at least 5 mils (0.005 inches), or 

an oxygen barrier film covered with a UV resistant material, within seventy-two (72)

hours of last delivery of material to the pile.

Continues on the next page

 
REVISED PROPOSED October 21, 2010 

4570 - 34 Revised Proposed Rule 4570

Table 4.1 – Dairy CAF Phase II Mitigation Measure Requirements (continued)

Choose one of the following:

b. Build silage piles such that the average bulk density of silage piles is at least 

44 lb/cu ft for corn silage and 40 lb/cu ft for other silage types, as measured in 

accordance with Section 7.11; or

c. When creating a silage pile, adjust filling parameters to assure a calculated average 

bulk density of at least 44 lb/cu ft for corn silage and at least 40 lb/cu ft for other 

silage types, using a spreadsheet approved by the District; or

d. Incorporate all of the following practices when creating silage piles:

i. Harvest silage crop at ≥65% moisture for corn; and ≥60% moisture for alfalfa/

grass and other silage crops; and

ii. Incorporate the following parameters for Theoretical Length of Chop (TLC) and 

roller opening, as applicable, for the crop being harvested.

Crop Harvested TLC 

(inches)

Roller Opening

(mm)

Corn with no processing ≤ 1/2 in N/A

Processed Corn <35% dry matter ≤ 3/4 in 1 - 4 mm

Alfalfa/Grass ≤ 1.0 in N/A

Wheat/Cereal Grains/Other ≤ 1/2 in N/A

iii. Manage silage material delivery such that no more than six (6) inches of material 

are un-compacted on top of the pile.

Choose two of the following:

e. Manage exposed silage (select one of the following):

i. Manage silage piles such that only one silage pile has an uncovered face and the 

uncovered face has a total exposed surface area of less than 2,150 square feet; or

ii. Manage multiple uncovered silage piles such that the total exposed surface area 

of all uncovered silage piles is less than 4,300 square feet.

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 35 Revised Proposed Rule 4570

Table 4.1 – Dairy CAF Phase II Mitigation Measure Requirements (continued)

f. Maintain silage working face (select one of the following):

i. Use a shaver/facer to remove silage from the silage pile; or

ii. Maintain a smooth vertical surface on the working face of the silage pile.

g. Silage Additives (select one of the following):

i. Inoculate silage with homolactic lactic acid bacteria in accordance with 

manufacturer recommendations to achieve a concentration of at least 100,000 

colony forming units per gram of wet forage; or

ii. Apply propionic acid, benzoic acid, sorbic acid, sodium benzoate, or potassium 

sorbate at a rate specified by the manufacturer to reduce yeast counts when 

forming silage pile; or

iii. Apply other additives at specified rates that have been demonstrated to reduce 

alcohol concentrations in silage and/or VOC emissions from silage and have been 

approved by the District and EPA.

2. Utilize a sealed feed storage system (e.g., Ag-Bag) for silage.

3. Implement an alternative mitigation measure(s), not listed above. 

C. Milking Parlor:

 An owner/operator of a dairy CAF shall implement at least one (1) of the following 

mitigation measures in each milking parlor:

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

milking.

2. Implement an alternative mitigation measure(s), not listed above. 

D. Freestall Barn:

 An owner/operator of a dairy CAF that houses animals in freestalls shall implement 

mitigation measures 1 and 2 and at least one (1) additional mitigation measure in each 

freestall barn:

1. Pave feedlanes, where present, for a width of at least eight (8) feet along the corral side 

of the feedlane fence for milk and dry cows and at least six (6) feet along the corral side 

of the feedlane for heifers.

2. Choose one of the following:

a. Flush, scrape, or vacuum freestall flush lanes immediately prior to, immediately 

after, or during each milking; or 

b. Flush or scrape freestall flush lanes at least three (3) times per day.

3. Use non-manure-based bedding and non-separated solids based bedding for at least 90% 

of the bedding material, by weight, for freestalls (e.g. rubber mats, almond shells, sand, 

or waterbeds). 

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 36 Revised Proposed Rule 4570

Table 4.1 – Dairy CAF Phase II Mitigation Measure Requirements (continued)

4. For a large dairy CAF, remove manure that is not dry from individual cow freestall beds 

or rake, harrow, scrape, or grade freestall bedding at least once every seven (7) days.

For a medium dairy CAF, remove manure that is not dry from individual cow freestall 

beds or rake, harrow, scrape, or grade freestall bedding at least once every fourteen (14) 

days.

5. Have no animals in exercise pens or corrals at any time.

6. Implement an alternative mitigation measure(s), not listed above.

E. Corrals:

An owner/operator of a dairy CAF that houses animals in corrals shall implement 

mitigation measures 1, 2, 3, 4, 5, and 6 and at least one (1) additional mitigation measure 

in each corral where animals have been housed in the last thirty (30) days:

1. Pave feedlanes, where present, for a width of at least 8 feet along the corral side of the 

feedlane fence for milk and dry cows and at least 6 feet along the corral side of the 

feedlane for heifers.

2. Choose one of the following:

a. Clean manure from corrals at least four (4) times per year with at least sixty (60) 

days between cleaning; or

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

September and December. 

3. Choose one of the following:

a. Scrape, vacuum, or flush concrete lanes in corrals at least once every day for mature 

cows and every seven (7) days for support stock; or

b. Clean concrete lanes such that the depth of manure does not exceed twelve 

(12) inches at any point or time.

4. Inspect water pipes and troughs and repair leaks at least once every seven (7) days.

5. Choose one of the following:

a. 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; or

b. Maintain corrals to ensure proper drainage preventing water from standing more than 

forty-eight (48) hours; or

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

6. If the CAF has shade structures, they must choose one of the following:

a. Install shade structures such that they are constructed with a light permeable roofing 

material; or

b. Install all shade structures uphill of any slope in the corral; or

c. Clean manure from under corral shades at least once every fourteen (14) days, when 

weather permits access into the corral; or

d. Install shade structure so that the structure has a North/South orientation.

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 37 Revised Proposed Rule 4570

Table 4.1 – Dairy CAF Phase II Mitigation Measure Requirements (continued)

7. Manage corrals such that the manure depth in the corral does not exceed twelve (12) 

inches at any time or point, except for in-corral mounding. Manure depth may exceed 12 

inches when corrals become inaccessible due to rain events. The facility must resume 

management of the manure depth of 12 inches or lower immediately upon the corral 

becoming accessible.

8. Knockdown fence line manure build-up prior to it exceeding a height of twelve (12) 

inches at any time or point. Manure depth may exceed 12 inches when corrals become 

inaccessible due to rain events. The facility must resume management of the manure 

depth of 12 inches or lower immediately upon the corral becoming accessible.

9. Choose one of the following:

a. Use lime or a similar absorbent material in the corrals according to the 

manufacturer's recommendation; or

b. Apply thymol to the feedlot soil in accordance with the manufacturer's 

recommendation. 

10. Implement an alternative mitigation measure(s), not listed above.

F. Solid Manure/Separated Solids:

Owners/operators of a large dairy CAF that handle or store solid manure or separated 

solids outside the animal housing shall implement at least one (1) of the following 

mitigation measures:

1. Within seventy-two (72) hours of removal from housing, either:

a. Remove dry manure from the facility; or 

b. Cover dry manure outside the housing with a weatherproof covering from October 

through May, except for times when wind events remove the covering, not to exceed 

twenty-four (24) hours per event.

2. Within seventy-two (72) hours of removal from the drying process, either:

a. Remove separated solids from the facility; or 

b. Cover separated solids outside the housing with a weatherproof covering from October 

through May, except for times when wind events remove the covering, not to exceed 

twenty-four (24) hours per event.

3. Implement an alternative mitigation measure(s), not listed above.

G. Liquid Manure:

An owner/operator of a dairy CAF that handles manure in a liquid form shall implement at 

least one (1) of the following mitigation measures:

1. Use a phototropic lagoon.

2. Use an anaerobic treatment lagoon designed in accordance with NRCS Guideline No. 

359.

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

entering the lagoon.

4. Maintain lagoon pH between 6.5 and 7.5.

5. Implement an alternative mitigation measure(s), not listed above.

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 38 Revised Proposed Rule 4570

Table 4.1 – Dairy CAF Phase II Mitigation Measure Requirements (continued)

H. Land Application:

An owner/operator of a dairy CAF who land applies manure to crop land on the facility 

shall implement the following applicable mitigation measures:

1. If the CAF applies solid manure, choose one of the following:

a. Incorporate all solid manure within seventy-two (72) hours of land application; or

b. Only apply solid manure that has been treated with an anaerobic treatment lagoon, 

aerobic lagoon, or digester system; or 

c. Apply no solid manure with a moisture content of more than 50%; or

d. Implement an alternative mitigation measure(s), not listed above.

2. If the CAF applies liquid manure, choose one of the following:

a. Only apply liquid manure that has been treated with an anaerobic treatment lagoon, 

aerobic lagoon, or digester system; or 

b. Allow liquid manure to stand in the fields for no more than twenty-four (24) hours 

after irrigation; or 

c. Apply liquid/slurry manure via injection with drag hose or similar apparatus; or

d. Implement an alternative mitigation measure(s), not listed above.
REVISED PROPOSED October 21, 2010 

4570 - 39 Revised Proposed Rule 4570

5.6.2 Beef Feedlots: Owners/operators of a beef feedlot CAF shall comply with the 

Phase II mitigation measures in Table 4.2.

Table 4.2 – Beef Feedlot Phase II Mitigation Measure Requirements

A. Feed:

 An owner/operator of a beef feedlot CAF shall implement at least two (2) of the following 

feed mitigation measures:

1. Feed according to National Research Council (NRC) guidelines.

2. Feed steam-flaked, dry rolled, cracked or ground corn or other steam-flaked, dry rolled, 

cracked or ground cereal grains.

3. Remove uneaten wet feed from feed bunks within twenty-four (24) hours after the end of 

a rain event.

4. Implement an alternative mitigation measure(s), not listed above.

B. Silage:

 An owner/operator of a beef feedlot CAF that feeds silage shall implement at least one (1) 

of the following silage mitigation measures:

1. Operators selecting this option must choose mitigation measure 1a plus one (1) from 

mitigation measures 1b, 1c, 1d plus two (2) from mitigation measures 1e, 1f, 1g:

a. Cover the surface of silage piles, except for the area where feed is being removed 

from the pile, with a plastic tarp that is at least five (5) mils thick (0.005 inches), 

multiple plastic tarps with a cumulative thickness of at least 5 mils (0.005 inches), or 

an oxygen barrier film covered with a UV resistant material, within seventy-two (72)

hours of last delivery of material to the pile.

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 40 Revised Proposed Rule 4570

Table 4.2 – Beef Feedlot Phase II Mitigation Measure Requirements (continued)

Choose one of the following:

b. Build silage piles such that the average bulk density of silage piles is at least 

44 lb/cu ft for corn silage and 40 lb/cu ft for other silage types, as measured in 

accordance with Section 7.11; or

c. When creating a silage pile, adjust filling parameters to assure a calculated average 

bulk density of at least 44 lb/cu ft for corn silage and at least 40 lb/cu ft for other 

silage types, using a spreadsheet approved by the District; or

d. Incorporate all of the following practices when creating silage piles:

i. Harvest silage crop at ≥65% moisture for corn; and ≥60% moisture for alfalfa/ 

grass and other silage crops; and

ii. Incorporate the following parameters for Theoretical Length of Chop (TLC) and 

roller opening, as applicable, for the crop being harvested.

Crop Harvested TLC 

(inches)

Roller Opening

(mm)

Corn with no processing ≤ 1/2 in N/A

Processed Corn <35% dry matter ≤ 3/4 in 1 - 4 mm

Alfalfa/Grass ≤ 1.0 in N/A

Wheat/Cereal Grains/Other ≤ 1/2 in N/A

iii. Manage silage material delivery such that no more than six (6) inches of material 

are un-compacted on top of the pile.

Choose two of the following:

e. Manage exposed silage (select one of the following):

i. Manage silage piles such that only one silage pile has an uncovered face and the 

uncovered face has a total exposed surface area of less than 2,150 square feet; or

ii. Manage multiple uncovered silage piles such that the total exposed surface area 

of all uncovered silage piles is less than 4,300 square feet.

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 41 Revised Proposed Rule 4570

Table 4.2 – Beef Feedlot Phase II Mitigation Measure Requirements (continued)

f. Maintain silage working face (select one of the following):

i. Use a shaver/facer to remove silage from the silage pile; or

ii. Maintain a smooth vertical surface on the working face of the silage pile.

g. Silage Additives (select one of the following):

i. Inoculate silage with homolactic lactic acid bacteria in accordance with 

manufacturer recommendations to achieve a concentration of at least 100,000 

colony forming units per gram of wet forage; or

ii. Apply propionic acid, benzoic acid, sorbic acid, sodium benzoate, or potassium 

sorbate at a rate specified by the manufacturer to reduce yeast counts when 

forming silage pile; or

iii. Apply other additives at specified rates that have been demonstrated to reduce 

alcohol concentrations in silage and/or VOC emissions from silage and have been 

approved by the District and EPA.

2. Utilize a sealed feed storage system (e.g., Ag-Bag) for silage.

3. Implement an alternative mitigation measure(s), not listed above. 

C. Housing:

An owner/operator of a beef feedlot CAF shall implement mitigation measures 1, 2, 3, and 

4 and at least one (1) additional mitigation measure in each of the animal housing 

structures (e.g. each corral, etc.):

1. Scrape corrals twice a year with at least ninety (90) days between cleanings, excluding the 

removal of in-corral mounds.

2. Inspect water pipes and troughs and repair leaks at least once every seven (7) days.

3. Choose one of the following:

a. 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. 

b. Maintain corrals to ensure proper drainage preventing water from standing more than 

forty-eight (48) hours; or

c. Harrow, rake, or scrape corrals sufficiently to maintain a dry surface, unless the 

corrals have not held animals in the last thirty (30) days. 

4. If the CAF has shade structures, they must choose with one of the following:

a. Install shade structures such that they are constructed with a light permeable roofing 

material; or

b. Install all shade structures uphill of any slope in the corral; or

c. Install shade structure so that the structure has a North/South orientation.

5. Manage corrals and concrete lanes such that the dry manure depth in the pen does not 

exceed twelve (12) inches at any time or point, except for in-corral mounds. Manure 

depth may exceed twelve (12) inches when corrals become inaccessible due to rain 

events. The facility must resume management of the manure depth of twelve (12) inches 

or lower immediately upon the corral becoming accessible.

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 42 Revised Proposed Rule 4570

Table 4.2 – Beef Feedlot Phase II Mitigation Measure Requirements (continued)

6. Knockdown fence line manure build-up prior to it exceeding a height of twelve (12) 

inches at any time or point. Manure depth may exceed twelve (12) inches when corrals 

become inaccessible due to rain events. The facility must resume management of the 

manure depth of twelve (12) inches or lower immediately upon the corral becoming 

accessible.

7. Implement an alternative mitigation measure(s), not listed above.

D. Solid Manure/Separated Solids:

 An owner/operator of a beef feedlot CAF that handles or stores solid manure or separated 

solids outside the animal housing shall implement at least one (1) of the following 

mitigation measures:

1. Choose one of the following:

a. Within 72 hours of removal from animal housing, either remove dry manure from the 

facility or, during the months of October through May, cover dry manure pile with a 

weatherproof covering, except for times, not to exceed twenty-four (24) hours per 

event, when wind events remove the covering.; or

b. Manage moisture content of manure to less than 50%. 

2. Implement an alternative mitigation measure(s), not listed above.

E. Liquid Manure:

An owner/operator of a beef feedlot CAF that handles manure in a liquid form shall 

implement at least one (1) of the following mitigation measures:

1. Use a phototropic lagoon.

2. Use an anaerobic treatment lagoon designed in accordance with NRCS Guideline No. 

359.

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

entering the lagoon.

4. Maintain lagoon pH between 6.5 and 7.5.

5. Implement an alternative mitigation measure(s), not listed above.

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 43 Revised Proposed Rule 4570

Table 4.2 – Beef Feedlot Phase II Mitigation Measure Requirements (continued)

F. Land Application:

 An owner operator of a beef feedlot CAF who land applies manure to crop land on the 

facility shall implement the following applicable mitigation measures:

1. If the CAF applies solid manure, choose one of the following:

a. Incorporate all solid manure within seventy-two (72) hours of land application; or

b. Only apply solid manure that has been treated with an anaerobic treatment lagoon, 

aerobic lagoon, or digester system; or 

c. Apply no solid manure with a moisture content of more than 50%; or

d. Implement an alternative mitigation measure(s), not listed above.

2. If the CAF applies liquid manure, choose one of the following:

a. Only apply liquid manure that has been treated with an anaerobic treatment lagoon, 

aerobic lagoon, or digester system; or 

b. Allow liquid manure to stand in the fields for no more than twenty-four (24) hours 

after irrigation; or 

c. Apply liquid/slurry manure via injection with drag hose or similar apparatus; or

d. Implement an alternative mitigation measure(s), not listed above.
REVISED PROPOSED October 21, 2010 

4570 - 44 Revised Proposed Rule 4570

5.6.3 Other Cattle CAF: Owners/operators of an other cattle CAF shall comply with 

the Phase II mitigation measures in Table 4.3.

Table 4.3 – Other Cattle Phase II Mitigation Measure Requirements

A. Feed:

 An owner/operator of an other cattle CAF shall implement at least two (2) of the following 

feed mitigation measures:

1. Feed according to National Research Council (NRC) guidelines.

2. Feed steam-flaked, dry rolled, cracked or ground corn or other steam-flaked, dry rolled, 

cracked or ground cereal grains.

3. Remove uneaten wet feed from feed bunks within twenty-four (24) hours after the end of 

a rain event.

4. Implement an alternative mitigation measure(s), not listed above.

B. Silage:

 An owner/operator of an other cattle CAF that feeds silage shall implement at least one (1) 

of the following silage mitigation measures:

1. Operators selecting this option must choose mitigation measure 1a plus one (1) from 

mitigation measures 1b, 1c, 1d plus two (2) from mitigation measures 1e, 1f, 1g:

a. Cover the surface of silage piles, except for the area where feed is being removed 

from the pile, with a plastic tarp that is at least five (5) mils thick (0.005 inches), 

multiple plastic tarps with a cumulative thickness of at least 5 mils (0.005 inches), or 

an oxygen barrier film covered with a UV resistant material, within seventy-two (72) 

hours of last delivery of material to the pile.

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 45 Revised Proposed Rule 4570

Table 4.3 – Other Cattle Phase II Mitigation Measure Requirements

Choose one of the following:

b. Build silage piles such that the average bulk density of silage piles is at least 

44 lb/cu ft for corn silage and 40 lb/cu ft for other silage types as measured in 

accordance with Section 7.11; or

c. When creating a silage pile, adjust filling parameters to assure a calculated average 

bulk density of at least 44 lb/cu ft. for corn silage and at least 40 lb/cu ft for other 

silage types using a spreadsheet approved by the District; or

d. Incorporate all of the following practices when creating silage piles:

i. Harvest silage crop at ≥65% moisture for corn; and ≥60% moisture for alfalfa/

grass and other silage crops; and

ii. Incorporate the following parameters for Theoretical Length of Chop (TLC) and 

roller opening, as applicable, for the crop being harvested.

Crop Harvested TLC 

(inches)

Roller Opening

(mm)

Corn with no processing ≤ 1/2 in N/A

Processed Corn <35% dry matter ≤ 3/4 in 1 - 4 mm

Alfalfa/Grass ≤ 1.0 in N/A

Wheat/Cereal Grains/Other ≤ 1/2 in N/A

iii. Manage silage material delivery such that no more than six (6) inches of material 

are un-compacted on top of the pile.

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 46 Revised Proposed Rule 4570

Table 4.3 – Other Cattle Phase II Mitigation Measure Requirements (continued)

Choose one of the following:

e Manage exposed silage (select one of the following):

i. Manage silage piles such that only one silage pile has an uncovered face and the 

uncovered face has a total exposed surface area of less than 2,150 square feet; or

ii. Manage multiple uncovered silage piles such that the total exposed surface area of 

all uncovered silage piles is less than 4,300 square feet.

f. Maintain silage working face (select one of the following):

i. Use a shaver/facer to remove silage from the silage pile; or

ii. Maintain a smooth vertical surface on the working face of the silage pile.

g. Silage Additives (select one of the following):

i. Inoculate silage with homolactic lactic acid bacteria in accordance with 

manufacturer recommendations to achieve a concentration of at least 100,000 

colony forming units per gram of wet forage; or

ii. Apply propionic acid, benzoic acid, sorbic acid, sodium benzoate, or potassium 

sorbate at a rate specified by the manufacturer to reduce yeast counts when 

forming silage pile; or

iii. Apply other additives at specified rates that have been demonstrated to reduce 

alcohol concentrations in silage and/or VOC emissions from silage and have been 

approved by the District and EPA.

2. Utilize a sealed feed storage system (e.g., Ag-Bag) for silage.

3. Implement an alternative mitigation measure(s), not listed above. 

C. Freestalls:

 An owner/operator of an other cattle CAF that houses animals in freestalls shall implement 

mitigation measures 1 and 2 and at least one (1) additional mitigation measure in each 

freestall barn:

1. Vacuum, scrape, or flush freestalls at least once every seven (7) days.

2. Pave feedlanes, where present, for a width of at least six (6) feet along the corral side of 

the feedlane.

3. Use non-manure-based bedding and non-separated solids based bedding for at least 90% 

of the bedding material, by weight, for freestalls (e.g. rubber mats, almond shells, sand, 

or waterbeds).

4. Remove manure that is not dry from individual cow freestall beds or rake, harrow, 

scrape, or grade bedding in freestalls at least once every seven (7) days.

5. Implement an alternative mitigation measure(s), not listed above.

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 47 Revised Proposed Rule 4570

Table 4.3 – Other Cattle Phase II Mitigation Measure Requirements (continued)

D. Corrals:

An owner/operator of a other cattle CAF that houses animals in corrals shall implement 

mitigation measures 1, 2, 3, 4, and 5 and at least one (1) additional mitigation measure in 

each corral where animals have been housed in the last thirty (30) days:

1. Scrape corrals twice a year with at least 90 days between cleanings, excluding in-corral 

mounds.

2. Choose one of the following:

a. Scrape, vacuum, or flush concrete lanes in corrals at least once every seven (7) days; 

or

b. Clean concrete lanes such that the depth of manure does not exceed twelve 

(12) inches at any point or time.

3. Inspect water pipes and troughs and repair leaks at least once every seven (7) days.

4. Choose one of the following:

a. 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. 

b. Maintain corrals to ensure proper drainage preventing water from standing more than 

forty-eight (48) hours; or

c. Harrow, rake, or scrape corrals and corrals sufficiently to maintain a dry surface, 

unless the corrals have not held animals in the last thirty (30) days.

5. If the CAF has shade structures, they must choose one of the following:

a. Install shade structures such that they are constructed with a light permeable roofing 

material; or

b. Install all shade structures uphill of any slope in the corral; or

c. Install shade structure so that the structure has a North/South orientation.

6. Manage corrals and concrete lanes such that the dry manure depth in the pen does not 

exceed twelve (12) inches at any time or point, except for in-corral mounds. Manure depth 

may exceed twelve (12) inches when corrals become inaccessible due to rain events. The 

facility must resume management of the manure depth of twelve (12) inches or lower 

immediately upon the corral becoming accessible.

7. Knockdown fence line manure build-up prior to it exceeding a height of twelve (12) inches 

at any time or point. Manure depth may exceed twelve (12) inches when corrals become 

inaccessible due to rain events. The facility must resume management of the manure depth 

of twelve (12) inches or lower immediately upon the corral becoming accessible.

8. Choose one of the following:

a. Use lime or a similar absorbent material in the corrals according to the manufacturer's 

recommendation; or

b. Apply thymol to the feedlot soil in accordance with the manufacturer's 

recommendation. 

9. Implement an alternative mitigation measure(s), not listed above.

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 48 Revised Proposed Rule 4570

Table 4.3 – Other Cattle Phase II Mitigation Measure Requirements (continued)

E. Solid Manure/Separated Solids:

 An owner operator of an other cattle CAF that handles or stores solid manure or separated 

solids outside the animal housing shall implement at least one (1) of the following 

mitigation measures:

1. Within seventy-two (72) hours of removal from housing, either:

a. Remove dry manure from the facility; or 

b. Cover dry manure outside the housing with a weatherproof covering from October 

through May, except for times when wind events remove the covering, not to exceed 

twenty-four (24) hours per event.

2. Within seventy-two (72) hours of removal from the drying process, either:

a. Remove separated solids from the facility; or 

b. Cover separated solids outside the housing with a weatherproof covering from October 

through May, except for times when wind events remove the covering, not to exceed 

twenty-four (24) hours per event.

3. Implement an alternative mitigation measure(s), not listed above.

F. Liquid Manure:

An owner/operator of an other cattle CAF that handles manure in a liquid form shall 

implement at least one (1) of the following mitigation measures:

1. Use a phototropic lagoon.

2. Use an anaerobic treatment lagoon designed in accordance with NRCS Guideline No. 359.

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

4. Maintain lagoon pH between 6.5 and 7.5.

5. Implement an alternative mitigation measure(s), not listed above.

G. Land Application:

 An owner/operator of an other cattle CAF who land applies manure to crop land on the 

facility shall implement the following applicable mitigation measures:

1. If the CAF applies solid manure, choose one of the following:

a. Incorporate all solid manure within seventy-two (72) hours of land application; or

b. Only apply solid manure that has been treated with an anaerobic treatment lagoon, 

aerobic lagoon, or digester system; or 

c. Apply no solid manure with a moisture content of more than 50%; or

d. Implement an alternative mitigation measure(s), not listed above.

2. If the CAF applies liquid manure, choose one of the following:

a. Only apply liquid manure that has been treated with an anaerobic treatment lagoon, 

aerobic lagoon, or digester system; or 

b. Allow liquid manure to stand in the fields for no more than twenty-four (24) hours 

after irrigation; or 

c. Apply liquid/slurry manure via injection with drag hose or similar apparatus; or

d. Implement an alternative mitigation measure(s), not listed above.
REVISED PROPOSED October 21, 2010 

4570 - 49 Revised Proposed Rule 4570

5.6.4 Swine CAF: An owner/operator of a swine CAF shall comply with the Phase II 

mitigation measures in Table 4.4.

Table 4.4 – Swine Phase II Mitigation Measure Requirements

A. Feed:

Owners/operators of a swine CAF shall implement at least two (2) of the following feed 

mitigation measures:

1. Use grain with an average particle size diameter between 300-800 microns. 

2. Utilize phase feeding and split-sex feeding programs to more closely match the nutrient 

requirements of animals. 

3. Implement an alternative mitigation measure(s), not listed above.

B. Housing:

Owners/operators of a swine CAF shall implement at least three (3) of the following 

mitigation measures in each animal housing unit:

1. Use a slatted floor system (slatted floors over deep pits or shallow flush alleys), with daily 

manure removal for shallow flush alleys and weekly removal from deep pits.

2. Manage pens such that the manure depth in the pen does not exceed twelve (12) inches at 

any time or point.

3. Inspect water pipes and troughs and repair leaks at least once every seven (7) days.

4. Implement an alternative mitigation measure(s), not listed above.

C. Liquid Manure:

Owners/operators of a swine CAF that handle manure in a liquid form shall implement at 

least one (1) of the following mitigation measures: 

1. Use a phototropic lagoon.

2. Use an anaerobic treatment lagoon designed in accordance with NRCS Guideline No. 359.

3. Maintain lagoon pH between 6.5 and 7.5.

4. Implement an alternative mitigation measure(s), not listed above.

D. Land Application:

Owners/operators of a swine CAF who land apply liquid manure to crop land on the facility 

shall implement one (1) of the following mitigation measures:

1. Allow liquid manure to stand in the fields for no more than twenty-four (24) hours after 

irrigation.

2. Implement an alternative mitigation measure(s), not listed above.
REVISED PROPOSED October 21, 2010 

4570 - 50 Revised Proposed Rule 4570

5.6.5 Layer CAF: An owner/operator of a layer CAF shall comply with the Phase II 

mitigation measures in Table 4.5.

Table 4.5 – Layer Phase II Mitigation Measure Requirements

A. Feed:

Owners/operators of a layer CAF shall implement at least one (1) of the following feed 

mitigation measures:

1. Choose one of the following:

a. Feed according to NRC guidelines; or

b. Feed animals probiotics designed to improve digestion according to manufacturer 

recommendations; or 

c. Feed animals an amino acid supplemented diet to meet their nutrient requirements; or 

d. Feed animals feed additives such as amylase, xylanase, and protease, designed to 

maximize digestive efficiency according to manufacturer recommendations. 

2. Implement an alternative mitigation measure(s), not listed above.

B. Housing:

Owners/operators of a layer CAF shall implement at least two (2) of the following housing 

mitigation measures:

1. Use drinkers that do not drip continuously.

2. Inspect water pipes and drinkers and repair leaks daily.

3. Implement an alternative mitigation measure(s), not listed above.

C. Solid Manure/Separated Solids:

Owners/operators of a layer CAF that handle or store solid litter/manure or separated solids 

outside the animal housing shall implement at least one (1) of the following mitigation 

measures:

1. Within seventy-two (72) hours of removal from housing, either:

a. Remove all litter/manure from the facility; or 

b. Cover litter/manure outside the housing with a weatherproof covering from October 

through May, except for times when wind events remove the covering, not to exceed 

twenty-four (24) hours per event.

2. Implement an alternative mitigation measure(s), not listed above.

D. Liquid Manure:

Owners/operators of a layer CAF that handle manure in a liquid form shall implement at 

least one (1) of the following mitigation measures:

1. Use a phototropic lagoon.

2. Use an anaerobic treatment lagoon designed in accordance with NRCS Guideline No. 359.

3. Maintain lagoon pH between 6.5 and 7.5.

4. Implement an alternative mitigation measure(s), not listed above.
REVISED PROPOSED October 21, 2010 

4570 - 51 Revised Proposed Rule 4570

5.6.6 Broiler, Duck, or Turkey CAF: An owner/operator of a chicken broiler, duck, 

or turkey CAF shall comply with the Phase II mitigation measures in Table 4.6.

Table 4.6 – Broiler, Duck, or Turkey Phase II Mitigation Measure Requirements

A. Feed:

Owners/operators of a broiler, duck, or turkey CAF shall implement at least one (1) of the 

following feed mitigation measures:

1. Choose one of the following:

a. Feed according to NRC guidelines; or

b. Feed animals probiotics designed to improve digestion according to manufacturer 

recommendations; or

c. Feed animals an amino acid supplemented diet to meet their nutrient requirements; or

d. Feed animals feed additives such as amylase, xylanase, and protease, designed to 

maximize digestive efficiency according to manufacturer recommendations.

2. Implement an alternative mitigation measure(s), not listed above.

B. Housing: 

Owners/operators of a broiler or duck CAF shall implement at least four (4) of the 

following housing mitigation measures:

Owners/operators of a turkey CAF shall implement at least five (5) of the following housing 

mitigation measures:

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

required for animal health or biosecurity issues, pursuant to Section 5.4.

2. Use drinkers that do not drip continuously.

3. Inspect drinkers at least once every seven (7) days and adjust the height, volume, and 

location of drinkers if necessary.

4. Inspect water pipes and drinkers and repair leaks daily.

5. If the facility houses turkeys in pens, install mounds or berms up gradient to prevent the

runoff of storm water into pens.

6. Implement an alternative mitigation measure(s), not listed above.

Continues on the next page
REVISED PROPOSED October 21, 2010 

4570 - 52 Revised Proposed Rule 4570

Table 4.6 – Broiler, Duck, or Turkey Phase II Mitigation Measure Requirements (continued)

C. Solid Manure/Separated Solids:

Owners/operators of a broiler, duck, or turkey CAF that handles or stores solid 

litter/manure or separated solids outside the animal housing shall implement at least one (1) 

of the following mitigation measures:

1. Within seventy-two (72) hours of removal from housing, either:

a. Remove all litter/manure from the facility; or 

b. Cover litter/manure outside the housing with a weatherproof covering from October 

through May, except for times when wind events remove the covering, not to exceed 

twenty-four (24) hours per event. 

2. Implement an alternative mitigation measure(s), not listed above.

D. Liquid Manure:

Owners/operators of a broiler, duck, or turkey CAF that handles manure in a liquid form 

shall implement at least one (1) of the following mitigation measures:

1. Use a phototropic lagoon.

2. Use an anaerobic treatment lagoon designed in accordance with NRCS Guideline No. 359.

3. Maintain lagoon pH between 6.5 and 7.5.

4. Implement an alternative mitigation measure(s), not listed above.

5.11 Owners/operators may substitute a mitigation measure from one section in the 

applicable table (tables 2 through 6) for a mitigation measure in another section 

of the applicable table, provided it is demonstrated that the substitution would 

result in equal or greater emission reductions. Substituted measures shall be 

requested as part of the requirements of Section 6.0 and shall be included as 

permit requirements.

5.12 CAF facilities that are not dairies, beef feedlots, other cattle facilities, swine 

facilities, or poultry facilities shall submit an emission mitigation plan 

demonstrating reductions of at least 30% or adhere to all of the requirements of 

either Section 5.6, 5.7, 5.8, or 5.9.

5.13 CAF facilities listed in Sections 5.6 to 5.10 may submit an emission mitigation 

plan demonstrating facility wide reductions of at least 30% in lieu of complying 

with all of the requirements of either Section 5.6, 5.7, 5.8, 5.9, or 5.10.

6.0 Permit Requirements Monitoring Requirements

Owners/operators shall comply with the requirements of Section 6.1 when 

implementing all applicable Phase II Mitigation Measures in Section 5.6.
REVISED PROPOSED October 21, 2010 

4570 - 53 Revised Proposed Rule 4570

6.1 Lagoon Monitoring

Owners/operators using a mitigation measure for a lagoon in their approved 

emission mitigation plan shall monitor the lagoon for the required parameter(s), 

as determined by the APCO and EPA, at least once every calendar quarter, with 

at least 30 days between monitoring tests.

6.1 Owners/operators of any facility shall submit an Authority to Construct or 

Permit to Operate application by December 15, 2006 that includes the 

following:

6.1.1 The name, business address, and phone number of the owners/operators 

responsible for the preparation and the implementation of the mitigation 

measures listed in the permit.

6.1.2 The signature of the owners/operators attesting to the accuracy of the 

information provided and adherence to implementing the activities 

specified in the CAF Plan at all times and the date that the application 

was signed.

6.1.3 An emission mitigation plan including a list of all mitigation measures 

chosen to comply with Rule 4570 requirements and the location of these 

mitigation measures.

6.1.4 The number of animals at the facility in each production stage.

6.1.5 Any other information necessary for the District to prepare an emission 

inventory of all regulated air pollutants emitted from the facility, as 

determined by the APCO.

6.1.6 A thirty-day public noticing and commenting period on the permit 

application. 

6.2 Owners/operators shall submit an update of the permit application to the District 

for review at least once every three (3) years. The update shall reflect changes 

in the operation and feasibility of mitigation measures.

6.3 The District shall act upon the Authority to Construct application or Permit to 

Operate application within six (6) months of receiving a complete application.
REVISED PROPOSED October 21, 2010 

4570 - 54 Revised Proposed Rule 4570

7.0 Administrative Requirements 

7.1 Records for Exempt CAFs

An owner/operator claiming exemption pursuant to Section 4.0 shall maintain 

records on a quarterly basis of the number and type of animals and production 

group at the facility. Examples of records that may be used to show proof of 

exemption include, but are not limited to, Dairy Herd Improvement Association 

records and animal inventories maintained for financial purposes. 

7.2 General Records for CAFs Subject to Section 5.0 Requirements

7.2.1 Permits: Owners/operators shall maintain copies of all facility permits.

7.2.2 Number of Animals: Owner/operators shall maintain records of the 

number of animals of each species and production group at the facility on 

a quarterly basis. Examples of records that may be used include, but are 

not limited to, Dairy Herd Improvement Association records and animal 

inventories done for financial purposes.

7.2.3 Owner/operators shall maintain records sufficient to demonstrate 

compliance with all applicable mitigation measures.

7.3. Records for Feed and Silage Mitigation Measures

7.3.1 Feed Content/Feed Additive: Records of feed content, formulation, and 

quantity of feed additive utilized, sufficient to verify compliance with 

approved feed content and feed additive mitigation measures. Records 

may include laboratory test results and other test results.

7.3.2 Feed Processing: Records sufficient to verify that feed was given to 

animals (for example, put in feed bunks) or disposed of within the time 

allowed by the approved mitigation measure.

7.3.3 Feed Removal: Records demonstrating that feed is removed within the 

specified time period.

7.3.4 Feed Storage: Records demonstrating that feed was kept in weatherproof 

storage for the required period. Records for feed storage shall be 

required when implementing the Phase II mitigation measures.

7.3.5 Feed Moisture Content: Records for annual testing to determine moisture 

content of mixed ration food that contains at least 30% by weight of 

silage. Records for feed moisture content shall be required when 

implementing the Phase II mitigation measures.
REVISED PROPOSED October 21, 2010 

4570 - 55 Revised Proposed Rule 4570

7.3.6 Silage Covers: Records demonstrating that silage was covered, including 

the thickness of the cover, in compliance with any silage mitigation 

measures chosen. Examples of records that show compliance include, 

but are not limited to, invoices demonstrating that silage covers were 

installed and maintained at the facility, cover thickness, records 

demonstrating the thickness of the silage cover, and maintenance records 

for repair or replacement of damaged covers.

7.3.7 Silage Pile Bulk Density at Pile Formation: Records of required practices 

used to ensure adequate bulk density of silage piles and/or measured bulk 

density of silage piles. Records for silage bulk density shall be required 

when implementing the Phase II mitigation measures.

7.3.8 Silage Pile Formation: Records demonstrating that silage piles were 

formed in compliance with any silage mitigation measures chosen. 

Examples of records that show compliance include, but are not limited 

to, moisture content of silage pile material, records of the length of cut

for the crop being harvested, records of silage material delivery date, 

records that there are no more than six inches of material un-compacted 

on top of the pile of silage piles. Records for silage pile formation shall 

be required when implementing the Phase II mitigation measures.

7.3.9 Silage Leachate: Records demonstrating that the leachate was collected 

either by an active or passive system and the system was maintained in a 

manner approved by the APCO and EPA. Examples of records that 

show compliance include, but are not limited to, design specification for 

the system and a maintenance checklist for inspections and repairs.

7.3.10 Exposed Silage: Records demonstrating that silage piles are managed

such that exposed surface area is in compliance with any silage 

mitigation measures chosen. Records for exposed silage shall be 

required when implementing the Phase II mitigation measures.

7.3.11 Silage Inoculation: Records demonstrating silage inoculation with either 

homolactic lactic acid bacteria, propionic acid, benzoic acid, sorbic acid

sodium benzoate, or potassium sorbate. Records shall include rate 

specified by manufacturer and rate applied by operator/owner, date of 

inoculation and date of silage pile formation completion. Records for 

silage inoculation shall be required when implementing the Phase II 

mitigation measures.

7.3.12 VOC Emission Control Systems: Source test results, 

monitoring/inspection logs and maintenance logs.
REVISED PROPOSED October 21, 2010 

4570 - 56 Revised Proposed Rule 4570

7.3.13 Weatherproof Coverings: Records verifying that any covers used are 

installed, used, and maintained in accordance with manufacturer 

recommendations and any applicable standard approved by the APCO 

and EPA. For covers removed by wind events, an estimate of when the 

cover was removed and documentation of when the cover was replaced.

7.3.14 Alternative Feed or Silage Mitigation Measures: Records sufficient to

verify compliance with each approved alternative mitigation measure to 

the satisfaction of the APCO and EPA.

7.4 Records for Milking Parlor Mitigation Measures

Records verifying that the milking parlor was flushed or hosed immediately 

prior to, immediately after, or during each milking.

7.5 Records for Freestall/Corral/Animal Housing

7.5.1 Bedding Material: Records of the material(s) used for animal bedding, 

including the percentage of non-manure. Records for bedding material 

shall be required when implementing the Phase II mitigation measures.

7.5.2 Clean/Scrape/Flush/Vacuum: Records sufficient to demonstrate that the 

removal of manure/bedding was performed as required in the approved 

mitigation measure. This may be a log when owners/operators initial 

that they performed all applicable practices.

7.5.3 Depth of Manure: Records demonstrating the measurement of the 

manure depth and measures taken to remove material greater than the 

amount allowed by the mitigation measure.

7.5.4 Foggers: Records, such as design specifications, demonstrating that 

foggers used to comply with rule requirements meet the required 

standards.

7.5.5 Lime, Thymol, and Eugenol: Records of the quantity of material applied 

and the area over which it was applied. Owners/operators shall also 

maintain manufacturer’s product application recommendations to 

demonstrate compliance with the recommendations.

7.5.6 Litter Additives: Records, including a copy of the manufacturer’s

recommendations, which demonstrate litter additives used to comply 

with rule requirements are administered in accordance with 

manufacturer's specifications.
REVISED PROPOSED October 21, 2010 

4570 - 57 Revised Proposed Rule 4570

7.5.7 Roof Structure/Runoff: Records such as design specifications and 

maintenance logs demonstrating that any roof runoff structures used to 

comply with rule are in compliance with applicable standards in NRCS 

Field Office Technical Guide Code 558 or other applicable standards 

approved by the APCO and EPA.

7.5.8 Shade Structures: Records, such as design specifications, demonstrating 

that any shade structures used to comply with rule requirements meet the 

required standards.

7.5.9 Slope/Drainage: Records sufficient to verify that harrowing and sloping 

of corrals used to comply with rule requirements are implemented as 

required in the rule.

7.5.10 Vacuum/Land Apply Cattle Waste: Records showing time of vacuuming 

and time of land application of the vacuumed solids.

7.5.11 VOC Emission Control Systems: Source test results, 

monitoring/inspection logs and maintenance logs.

7.5.12 Water Pipes, Drinkers, and Water Troughs: Records of inspections 

performed and repairs completed.

7.5.13 Wet Feed Removal: Records verifying that animal housing was inspected 

for wet feed after a rain event/inspection and that the wet feed was 

removed.

7.5.14 Alternative Freestall/Corral/Animal Housing Mitigation Measure: 

Records that demonstrate compliance with each approved alternative 

mitigation measure to the satisfaction of the APCO and EPA.

7.6 Records for Solid Manure/Separated Solids Outside of Animal Housing

7.6.1 Aerated Static Pile: Records of monitoring/inspection logs and 

maintenance logs.

7.6.2 Removal of Manure/Separated Solids: Records sufficient to verify when 

the waste was removed from freestall/corral/animal housing and when 

the waste was either removed from the facility or land incorporated. 

7.6.3 Storage of Manure/Separated Solids in an Aerobic/Anaerobic Digester

7.6.3.1 Records, such as design specifications and maintenance logs, 

demonstrating that any aerobic/anaerobic digesters used to 

comply with rule requirements meets the standards in NRCS 
REVISED PROPOSED October 21, 2010 

4570 - 58 Revised Proposed Rule 4570

Field Office Technical Guide Code 366 or 365 or other 

applicable standards approved by the APCO and EPA.

7.6.3.2 Records of the quantity of manure/separated solids, as needed, 

to comply with the approved Phase II mitigation measure.

7.6.4 VOC Emission Control Systems: Source test results, 

monitoring/inspection logs and maintenance logs.

7.6.5 Weatherproof Coverings: Records verifying that any covers used are 

installed, used, and maintained in accordance with manufacturer 

recommendations and any applicable standard approved by the APCO 

and EPA. For covers removed by wind events, an estimate of when the 

cover was removed and documentation of when the manure/separated 

solid piles were re-covered.

7.6.6 Alternative Solid Manure/Separated Solids Mitigation Measure: Records 

that demonstrate compliance with each approved alternative mitigation 

measure to the satisfaction of the APCO and EPA.

7.7 Records for Liquid Manure 

7.7.1 Lagoons

7.7.1.1 Test results of the approved monitoring parameter and records 

of measures taken to bring the parameter within specified 

limits.

7.7.1.2 Design specifications demonstrating that the lagoon meets the 

requirements listed in the NRCS Field Office Technical Guide 

for the lagoon type or other applicable standards approved by 

the APCO and EPA.

7.7.2 Solids Separator System

7.7.2.1 Records, such as design specifications and maintenance logs, 

demonstrating that the solids separator system meets the 

approved mitigation measure specifications and is operated and 

maintained as recommended by the manufacturer.

7.7.2.2 Non-Standard Chemicals: Record the quantity of material used. 

Owners/operators shall also maintain manufacturer’s product 

usage recommendations to demonstrate compliance with the 

manufacturer’s recommendations.
REVISED PROPOSED October 21, 2010 

4570 - 59 Revised Proposed Rule 4570

7.7.2.3 Non-Standard Equipment for Solid Separator System: Records, 

such as design specifications and maintenance logs, 

demonstrating that the solids separator equipment meets the 

approved mitigation measure specifications and is operated and 

maintained as recommended by the manufacturer.

7.7.3 VOC Emission Control Systems, including biofilters and other VOC 

emission control systems: Source test results, monitoring/inspection logs 

and maintenance logs.

7.7.4 Alternative Liquid Manure Mitigation Measures: Records that 

demonstrate compliance with the approved alternative mitigation 

measure, to the satisfaction of the APCO and EPA.

7.8 Records for Land Application of Manure

7.8.1 Time to Incorporate Manure: Records indicating the time the manure

was applied and when the waste was incorporated into the soil.

7.8.2 Lagoon-Treated or Digester-Treated Manure: Records that demonstrate 

that the applied manure came from an aerobic lagoon, an anaerobic 

treatment lagoon or a digester system.

7.8.3 Liquid Waste Standing in Field: Records that demonstrate that liquid 

manure does not remain in the field for longer than twenty-four (24) 

hours after application. 

7.8.4 Moisture Content of Solid Manure: Records of the moisture content of 

applied solid manure.
REVISED PROPOSED October 21, 2010 

4570 - 60 Revised Proposed Rule 4570

7.9 Records Retention

Owners/operators of a CAF subject to the requirements of Section 5.0 shall 

keep and maintain the required in Sections 7.1 through 7.8.4, as applicable, for 

a minimum of five (5) years and the records shall be made available to the 

APCO and EPA upon request.

7.1 Recordkeeping

7.1.1 The following records shall be kept and maintained for a minimum of 

five (5) years and shall be made available to the APCO, ARB, and EPA 

upon request:

7.1.1.1 Owners/operators claiming any exemption pursuant to Section 

4.0 shall maintain records demonstrating that the CAF meets 

the exemption criteria of this rule,

7.1.1.2 Owners/operators subject to the requirements of Section 5.0 

shall maintain:

7.1.1.2.1 Copies of all of the facility's permits,

7.1.1.2.2 Copies of all laboratory tests, calculations, logs, 

records, and other information required to 

demonstrate compliance with all applicable 

requirements of this rule, as determined by the 

APCO, ARB, EPA,

7.1.1.2.3 Records of the number of animals of each species 

and production group at the facility on the permit 

issuance date. Quarterly records of any changes to 

this information shall also be maintained, (e.g. Dairy 

Herd Improvement Association records, animal 

inventories done for financial purposes, etc.), 

7.1.1.2.4 Feed Content: owners/operators shall maintain 

records of feed content, formulation, quantity of 

feed additive utilized, sufficient to demonstrate 

compliance with any mitigation measures chosen 

(e.g. feed sheets),

7.1.1.2.5 Feed Processing: owners/operators shall maintain 

records demonstrating that feed was fed to animals 

(e.g. put in feed bunks) or disposed of within fortyeight (48) hours of grinding and mixing sufficient to 
REVISED PROPOSED October 21, 2010 

4570 - 61 Revised Proposed Rule 4570

demonstrate compliance with any mitigation 

measures chosen,

7.1.1.2.6 Feed Removal: owners/operators shall maintain 

records sufficient to demonstrate that feed was 

removed and disposed of in compliance with any 

mitigation measures chosen,

7.1.1.2.7 Silage: owners/operators shall maintain records 

demonstrating that silage was covered in compliance 

with any mitigation measures chosen (i.e. invoices 

demonstrating that silage covers were installed and 

maintained at the facility and maintenance records 

for repair or replacement of damaged covers),

7.1.1.2.8 Leachate: owners/operators choosing a mitigation 

measure relating to leachate collection shall maintain 

records demonstrating that the leachate was collected 

either by an active or passive system and the system 

was maintained in a manner approved by the APCO, 

ARB, and EPA (such as design specification for the 

system and a maintenance checklist for inspections 

and repairs),

7.1.1.2.9 Housing Cleaning: owners/operators shall maintain 

records sufficient to demonstrate management 

practices listed in the facility's emission mitigation 

plan were performed and manure height limits in the 

facility's emission mitigation plan were not 

exceeded. This may be a log when owners/operators 

initial that they performed all applicable practices 

and visually inspected manure buildup to ensure it 

does not exceed the height limits.

7.1.1.2.10 Floats: owners/operators choosing mitigation 

measures relating to floats on troughs shall maintain 

sufficient records to demonstrate that the floats are 

maintained in a manner to ensure that water does not 

intentionally or unintentionally spill onto an earthen 

ground,

7.1.1.2.11 Lime, thymol, and eugenol: owners/operators 

choosing mitigation measuring relating to lime, 

thymol, or eugenol shall maintain records including 

manufacture product application recommendations 
REVISED PROPOSED October 21, 2010 

4570 - 62 Revised Proposed Rule 4570

and product application records that demonstrate 

lime, thymol, or eugenol was applied in accordance 

with manufacturer recommendations,

7.1.1.2.12 Animal waste depth: owners/operators shall 

measure and record the depth of manure at its 

deepest depth at least one every ninety (90) days in 

each area that they chose a mitigation measure 

limiting animal waste depth,

7.1.1.2.13 Corral maintenance: owners/operators shall maintain 

records sufficient to demonstrate all housing 

management practices (including but not limited to 

harrowing and sloping of corrals) used to comply 

with rule requirements are implemented as required 

in the rule, 

7.1.1.2.14 Records, such as design specifications, 

demonstrating that any shade structures used to 

comply with rule requirements meet the required 

standards,

7.1.1.2.15 Records such as design specifications and 

maintenance logs demonstrating that any roof runoff 

structures used to comply with rule are in 

compliance with applicable standards in NRCS Field 

Office Technical Guide Code 558 or other applicable 

standards approved by the APCO, ARB, and EPA,

7.1.1.2.16 Records, including a copy of the manufactures' 

recommendations, that demonstrate any animal waste 

additives used to comply with rule requirements are 

administered in accordance with manufacturer's 

specifications, 

7.1.1.2.17 Records, such as manufacturer warranties or other 

documentation, demonstrating that any covers used, 

such as lagoon covers, weatherproof covering over 

solid animal waste, and weatherproof covering over 

separated solids, are installed, used, and maintained 

in accordance with manufacturer recommendations 

and applicable standards listed in NRCS Field Office 

Technical Guide Code 313 or 367, or any other 

applicable standard approved by the APCO, ARB, 

and EPA,
REVISED PROPOSED October 21, 2010 

4570 - 63 Revised Proposed Rule 4570

7.1.1.2.18 Records, such as design specifications and 

maintenance logs, demonstrating that any anaerobic 

digesters used to comply with rule requirements 

meetings the standards in NRCS Field Office 

Technical Guide Code 366 or 365 or other 

applicable standards approved by the APCO, ARB, 

and EPA, 

7.1.1.2.19 Records, such as design specifications, 

demonstrating that any aerobic, anaerobic, or 

mechanically aerated lagoon used to comply with 

rule requirements meets the dimension requirements 

listed in the NRCS Field Office Technical Guide 

Code 359,

7.1.1.2.20 Records, such as calculations, demonstrating that 

any aerobic, anaerobic, or mechanically aerated 

lagoon used to comply with rule requirements meets 

the dimension requirements listed in the NRCS Field 

Office Technical Guide Code 359, and

7.1.1.2.21 Records, such as design specifications and 

maintenance logs, demonstrating that any solid 

separation system complies with the applicable 

standards in NRCS Field Office Technical Guide 

632 or other applicable standard approved by the 

APCO, ARB, and EPA.

7.10 7.2 Compliance Testing, Monitoring, and Calculations Source Testing 

Requirements

7.10.1 7.2.1 Owners/operators shall conduct an initial source test of all VOC 

control devices and aerated static piles used to comply with rule 

requirements not later than six (6) months after the date of installation, 

and at least once every twelve (12) months thereafter unless the APCO, 

ARB, and EPA determines more frequent testing is required to 

demonstrate compliance with rule requirements. 

7.10.2 7.2.2 Owners/operators using phototrophic lagoons as a mitigation 

measure in their emission mitigation plan shall test lagoons for bacteria 

concentration, bacteriochlorophyll concentration, or a surrogate 

parameter determined by the APCO, ARB, and EPA not later than six 

(6) months after the date of issuance of the permit, and least once every 

twelve (12) months thereafter unless the APCO, ARB, and EPA 
REVISED PROPOSED October 21, 2010 

4570 - 64 Revised Proposed Rule 4570

determines more frequent testing is required to demonstrate compliance 

with rule requirements. 

7.10.3 7.2.3 Owners/operators using aerobic lagoons as a mitigation measure in 

their emission mitigation plan shall test lagoons for dissolved oxygen 

content not later than six (6) months after the date of issuance of the 

permit, and at least once every twelve (12) months thereafter, unless the 

APCO, ARB, and EPA determines more frequent testing is required to 

demonstrate compliance with rule requirements. 

7.10.4 7.2.4 Owners/operators using mechanically aerated lagoons as a 

mitigation measure in their emission mitigation plan shall test lagoons for 

biological oxygen demand within six (6) months after the date of 

issuance of the permit, and at least once every twelve (12) months 

thereafter, unless the APCO, ARB, and EPA determines more frequent 

testing is required to demonstrate compliance with rule requirements. 

7.10.5 7.2.5 Owners/operators using lagoon pH as a mitigation measure in their 

emission mitigation plan shall test lagoons for pH within six (6) months 

after the date of issuance of the permit, and at least once every twelve 

(12) months thereafter, unless the APCO, ARB, and EPA determines 

more frequent testing is required to demonstrate compliance with rule 

requirements. 

7.10.6 7.2.6 Owners/operators shall test any other parameters determined 

necessary by the APCO, ARB, and EPA to demonstrate compliance with 

rule requirements as frequently as determined necessary by the APCO, 

ARB, and EPA. 

7.11 7.3 Test Methods 

 Owners/operators shall conduct applicable testing using the following methods 

or any other alternative test method approved by the APCO and EPA. Test 

methods referenced shall be the latest approved version. 

7.11.1 Bacterial Concentration - ASTM D4454 - 85(2009) Standard Test 

Method for Simultaneous Enumeration of Total and Respiring Bacteria in 

Aquatic Systems by Microscopy or ASTM D4455 - 85(2009) Standard 

Test Method for Enumeration of Aquatic Bacteria by Epifluorescence 

Microscopy Counting Procedure.

7.11.2 Bacteriochlorophyll a Concentration – ASTM D3731 – 87 (2004)

Standard Practices for Measurement of Chlorophyll Content of Algae in 

Surface Waters.
REVISED PROPOSED October 21, 2010 

4570 - 65 Revised Proposed Rule 4570

7.11.3 7.3.1 EPA Method 405.1- Biological Oxygen Demand – EPA Method 

405.1 (Biochemical Oxygen Demand (5 days, 20°C)).

7.3.2 Control Efficiency or Emissions Determination:

7.3.2.1 South Coast Air Quality Management District (SCAQMD) 

Method 25.3 - Non-methane, Non-ethane Organic Compound 

Emissions from Clean Fueled Combustion Sources,

7.3.2.2 SCAQMD Method 1.1 - Sample and Velocity Traverses for 

Stationary Sources,

7.3.2.3 SCAQMD Method 1.2 - Sample and Velocity Traverses for 

Stationary Sources with Small Stacks or Ducts,

7.3.2.4 SCAQMD Method 2.1 - Determination of Stack Gas Velocity 

and Volumetric Flow Rate (S-Type Pitot Tube),

7.3.2.5 SCAQMD Method 2.2 - Direct Measurement of Gas Volume 

Through Pipes and Small Ducts,

7.3.2.6 SCAQMD Method 2.3 - Determination of Gas Velocity and 

Volumetric Flow Rate,

7.11.4 Bulk Packing Density of Silage Piles – Remove representative samples of 

known volume using a forage probe or other instrument and weighing 

the samples. Bulk density is the weight of the sample divided by the 

volume of material removed from the pile. The bulk density shall be 

determined as the average of at least three representative samples per 

silage pile.

7.11.5 Biofilter Control Efficiency – The control efficiency of a biofilter shall 

be determined using SCAQMD Method 25.3 (Determination of Low 

Concentration Non-Methane Non-Ethane Organic Compound Emissions 

from Clean Fueled Combustion Sources). The SCAQMD Method 25.3 

apparatus should be connected to sample directly inside the flux chamber 

or duct as applicable. Compost emissions are considered as watersoluble sources where the 50 ppm applicability limit of Method 25.3 

does not apply. Samples from more than one location may be combined 

(composited) per SCAQMD Rule 1133.2 Attachment A Section 8.

7.11.6 Non-Biofilter Control Efficiency – The control efficiency of a VOC 

emission control system that is not a biofilter shall be determined using:
REVISED PROPOSED October 21, 2010 

4570 - 66 Revised Proposed Rule 4570

7.11.6.1 EPA Methods 2 (Determination of Stack Gas Velocity and 

Volumetric Flow Rate (Type S Pitot Tube)), 2A (Volume 

Meters), or 2D (Rate Meters) for measuring flow rates.

7.11.6.2 EPA Methods 25, 25A, or 25B for measuring total gaseous 

organic concentrations at the inlet and outlet of the control 

device. 

7.11.6.3 EPA Method 18 or ARB Method 422 shall be used to determine 

the emissions of exempt compounds. 

7.11.7 7.3.3 Dissolved Oxygen - EPA Method 360.1 (Oxygen, Dissolved 

(Membrane Electrode)) or 360.2 (Oxygen, Dissolved (Modified 

Winkler, Full-Bottle Technique)).

7.11.8 7.3.4 Moisture Content for Biofilters - Test Methods for the 

Examination of Compost and Composting (TMECC) Method 3.09 

(Total Solids and Moisture at 70±5 degrees Centigrade) and

7.11.9 Moisture Content for Silage – Soil, Plant and Water Reference 

Methods for the Western Region [Third Edition, 2005] Test Method 

P1.10 (Dry Matter Content - Gravimetric), or American Association of 

Agricultural and Biological Engineers (ASABE) Standard S358.2, 

National Forage Testing Association (NFTA) Methods 2.1.3 and 

2.1.4, AOAC Methods: 930.15, 934.01, 991.01, and 2001.12.

7.11.10 7.3.5 Organic Loading - Standard Methods of the Examination of 

Water and Wastewater Method 2540 G – Solids. 

7.11.11 pH – EPA Method 150.2 (pH, Electrometric) or TMECC Method 

04.11-A (1:5 Slurry pH)

7.11.12 Temperature – EPA Method 170.1 (Temperature – Thermometric)

7.11.13 Alternative Test Methods – An operator may use an alternative test 

method to those listed in Sections 7.11.1 through 7.11.13 for which 

written approval of the APCO and EPA has been obtained.
REVISED PROPOSED October 21, 2010 

4570 - 67 Revised Proposed Rule 4570

8.0 Compliance Schedule 

8.1 Owners/operators of facilities subject to the Regulatory Threshold requirements 

of this rule under Table 2 shall submit a complete Permit-to-Operate or 

Authority-to-Construct application for the Phase II requirements in Section 5.6 

by (six months after rule adoption date) that complies with all applicable 

provisions of this rule.

8.1.1 Owners/operators shall comply with all provisions of Phase II 

requirements on and after 365 days from the Authority-to-Construct or 

Permit-to-Operate issuance date, whichever is earlier. 

8.1.2 Owners/operators of Large CAFs shall comply with the Phase I 

requirements in Section 5.5 until demonstrating full compliance with 

Phase II requirements in Section 5.6. 

8.2 Owners/operators of new or modified facilities that become subject to the 

Regulatory Threshold requirements of this rule under Table 2 shall comply with 

the Phase II requirements of Section 5.6.

8.1 Owners/operators of facilities existing on and before June 15, 2006 shall submit 

an Authority to Construct or Permit to Operate application by December 15, 

2006 that complies with all applicable provisions of this rule.

8.2 Owners/operators of facilities that commence operation after June 15, 2006 shall 

submit an Authority to Construct or Permit to Operate application prior to 

commencing operation or by December 15, 2006, whichever is later, that 

complies with all applicable provisions of this rule.

8.3 Owners/operators shall comply with all provisions of this rule and applicable 

permits on and after 365 days from the permit issuance date.

8.4 Loss of Exemption

Owners/operators of a CAF that is exempt pursuant to Section 4.0 and which 

becomes subject to this rule through the loss of exemption status shall comply 

with all applicable provisions of this rule on and after the date the exemption 

status is lost. 
REVISED PROPOSED October 21, 2010 

4570 - 68 Revised Proposed Rule 4570

This page intentionally blank