United States Environmental Protection Agency, Region 9 

Air Division 

Technical Support Document 

for 

EPA’s Notice of Rulemaking 

for the 

California State Implementation Plan 

Lake County Air Quality Management District’s 

Section 470, Air Toxics Control Measure for Emissions of Toxic Particulate Matter from In-Use 

Agricultural Compression Ignition Engines 

Prepared by: Idalia Pérez 

May 2014 
Lake County Air Quality Management District (LCAQMD) 

Submitted Rule 

LCAQMD Section 470, Air Toxics Control Measure for Emissions of Toxic Particulate Matter 

from In-Use Agricultural Compression Ignition Engines 

ß Adopted: September 21, 2010 

ß Submitted: April 5, 2011 

ß Determined complete: May 6, 2011 

Previous Rule Submittals 

The District has not adopted previous versions of this rule. 

SIP-Approved Rules 

There is no SIP-Approved version of Section 470. 

Rule Summary 

Section 470 provides a local administrative program for registering compression ignition (CI) 

stationary engines used in agricultural operations and controlling air emissions from these 

sources by setting engine tier requirements for some replacement units. The rule applies to 

owners and operators of CI engines greater than 50 bhp at agricultural operations and those who 

sell or offer for lease these engines. 

Part (B) of the rule contains definitions and part (C) contains the rule exemptions. Provision (E) 

delineates the units that are exempt from controls but require registration. Provisions (F)(1) 

through (F)(5) describe general requirements and procedures for engine registration. More details 

on the registration process and requirements are in (F)(8) through (F)(10) and in the provisions 

of (G). Provisions (F)(6) and (F)(7) describe units that must be replaced. 

Effects on Emissions 

The District does not provide information regarding emission reductions but indicates that there 

are approximately 130 existing units subject to the rule requirements 

Rule Evaluation Criteria 

We have evaluated Section 470 in accordance with the following criteria: 

1. Rule Stringency – Because LCAQMD is designated attainment for all National 

Ambient Air Quality Standards (40 CFR 81.305) there are no stringency 

requirements for emissions from this source category. Thus, we are not at this 

time opining on the stringency of this rule.

2. Enforceability – CAA section 110(a)(2)(A) requires that regulations submitted to 

EPA for approval into a State Implementation Plan (SIP) be clear and legally 

enforceable. 

3. SIP Revisions – CAA section 110(l) prohibits EPA from approving any SIP 

revision that would interfere with any applicable requirement concerning 
attainment and reasonable further progress (RFP) or any other applicable 

requirement of the CAA. In addition, CAA section 193 prohibits the modification 

of any SIP-approved control requirement in effect before November 15, 1990, in a 

nonattainment area unless the modification insures equivalent or greater emission 

reductions.

Guidance and policy documents that we used to evaluate Rule 470 include the following: 

· Issues Relating to VOC Regulation, Cutpoints, Deficiencies, and Deviations (the “Blue 

Book”), US EPA, OAQPS (May 25, 1988). 

· Guidance Document for Correcting Common VOC and Other Rule Deficiencies, EPA 

Region IX (August 21, 2001, the “Little Bluebook”). 

Evaluation of Enforceability 

LCAQMD Section 470 has two types of requirements: 

1. Point of sale requirements. 

2. Requirements regarding registration. 

Newly purchased or leased engines are required to be registered. At the time of registration, the 

APCO can ensure that the point of sale requirements are met. 

For existing engines subject to the rule, the owner or operator is required to obtain and maintain 

a registration from the District in accordance with requirements in the rule and the compliance 

schedule contained in California Health and Safety Code (CA H&SC) Section 93115.8 as 

adopted or modified by the ARB. This section of the CA H&SC is not currently in the California 

applicable SIP and revisions to this section would impact if and when a registration is required to 

be submitted. The compliance schedule for registration submission is in Section 93115.8(c)(1). 

Provision (F)(2) of the rule states that: 

“The APCO shall deny an application for a Permit if the applicant does not show that the 

engine is designed, controlled, equipped, and operated with air pollution control 

equipment in compliance with District Rules and Regulations, State and Federal statutes 

and regulations that may be enforceable by the APCO.” 

The CA H&SC does not have the technology exemption requirement for low use engines that 

Rule 470 has in Section (E)(2). It is unclear whether the APCO can grant a registration to an 

engine that falls within this exemption, in compliance with the rule but seemingly inconsistent 

with State law. 

Engine identification, meter and reporting requirements help ensure that the requirements in the 

rule are adequately enforceable. 

Evaluation of SIP Revision Criteria 

Since there is no previous version of the submitted rule in the SIP, its inclusion will strengthen 

the requirements of the SIP. Therefore, we propose to determine that our approval of the 

submittal would comply with CAA sections 110(l) and 193 because (1) the proposed SIP 

revision would not interfere with the on-going process for ensuring that requirements for RFP 
and attainment of the NAAQS are met, and (2) the change-out and registration requirements are 

more stringent than the existing SIP-approved control requirements. 

Suggested Rule Improvements 

The District should eliminate control technology exemptions for low use engines, provision 

(E)(2), and remotely located engines, provision (E)(3). 

Recommendation 

EPA staff recommends full approval of LCAQMD Section 470 under CAA section 110(k)(3). 

Other References 

1. Submitted Section 470 

2. Staff Report for Rule 470 

3. CA H&S Section 93115.8 
33

§ 93115.8 ATCM for Stationary CI Engines – Emission Standards for Stationary 

Diesel-Fueled CI Engines (>50 bhp) Used in Agricultural Operations. 

(a) Emission Standards for New Stationary Diesel-Fueled CI Engines (>50 bhp) Used 

in Agricultural Operations.

(1) As of January 1, 2005, except as provided in sections 93115.3, 

93115.8(a)(1)(A)(5), and 93115.8(a)(2), no person shall sell, purchase, or lease 

for use in California any new stationary diesel-fueled engine to be used in 

agricultural operations that has a rated brake horsepower greater than 50, or 

operate any new stationary diesel-fueled engine to be used in agricultural 

operations that has a rated brake horsepower greater than 50, unless the engine 

meets all of the following emission performance standards (which are 

summarized in Table 6.): 

Table 6: Summary of the Emission Standards for New Stationary

Diesel-Fueled Cl Engines > 50 BHP Used in Agricultural Operations 

(See section 93115.8(a))

Diesel PM Other Pollutants 

Horsepower Range HC, NOx, NMHC+NOx, and CO 

(hp) Diesel PM Standards Standards 

(g/bhp-hr) (g/bhp-hr) 

All Applications 

Greater Than 

50 But Less Than 100, 

Other Than Generator Sets

Less Than or Equal to 0.301

OR 

Off-Road Cl Engine Certification 

Standard for an off-road engine of 

the same maximum rated power, 

whichever is more stringent 

Off-Road Cl Engine Certification 

Standard for an off-road engine of 

the model year and maximum 

rated power of the engine installed to 

meet the applicable PM standard, or 

Tier 1 standards.1

Less Than or Equal to 0.221

All Applications Greater 

Than or Equal to 100 But 

Less Than 175, Other 

Than Generator Sets 

OR 

Off-Road Cl Engine Certification 

Standard for an off-road engine of 

the same maximum rated power, 

whichever is more stringent 

All Applications Greater 

Than or Equal to 175, 

Other Than Generator Sets

Less than or Equal to 0.151

OR 

Off-Road Engine Certification 

Standard for an off-road engine of 

the same maximum rated power, 

whichever is more stringent 

Less Than or Equal to 0. 151

OR 

Generator Set Engines 

Greater Than 50 Off-Road Cl Engine Certification 

Standard for an off-road engine of 

the same maximum rated power, 

whichever is more stringent. 

1. Prior to January 1, 2008, these limits shall not apply to engines sold from one agricultural operation to 

another and funded under State or federal incentive funding programs, as pecified in 93115.8(a)(2). 
34

(A) Diesel PM Standard:

 1. New agricultural stationary diesel-fueled Cl engines, used in all 

 agricultural operations except generator set applications with a 

 maximum rated horsepower greater than 50 but less than 100 shall 

 emit no more than 0.30 g/bhp-hr diesel particulate matter (PM) limit or 

 shall meet the standards, as specified in the Off-Road Compression 

 Ignition Engine Standards for off-road engines of the same maximum 

 rated power (title 13, CCR, section 2423), in effect on the date of 

 acquisition or submittal, as defined in section 93115.4, whichever is 

 more stringent; and 

 2. New agricultural stationary diesel-fueled Cl engines, used in all 

 agricultural operations except generator set applications with a 

 maximum rated horsepower greater than or equal to 100 but less 

 than 175 shall emit no more than 0.22 g/bhp-hr diesel particulate 

 matter (PM) limit or shall meet the standards, as specified in the 

 Off-Road Compression Ignition Engine Standards for off-road engines 

 of the same maximum rated power (title 13, CCR, section 2423), in 

 effect on the date of acquisition or submittal, as defined in 

 section 93115.4 whichever is more stringent; and 

 3. New agricultural stationary diesel-fueled CI engines, used in all 

 agricultural operations except generator set applications with a 

 maximum rated horsepower greater than or equal to 175 shall emit 

 no more than 0.15 g/bhp-hr diesel PM or shall meet the standards, 

 as specified in the Off-Road Compression Ignition Engine 

 Standards for off-road engines of the same maximum rated power 

 (title 13, CCR, section 2423), in effect on the date of acquisition or 

 submittal, as defined in section 93115.4, whichever is more 

 stringent; and 

 4. New agricultural stationary diesel-fueled Cl engines, used in 

 generator set applications with a maximum rated horsepower 

 greater than 50, shall emit no more than 0.15 g/bhp-hr diesel PM, 

 or shall meet the standards, as specified in the Off-Road 

 Compression Ignition Engine Standards for off-road engines of the 

 same maximum rated power (title 13, CCR, section 2423), in effect 

 on the date of acquisition or submittal, as defined in section 93115.4, 

 whichever is more stringent; 

 5. On a site-specific basis, a District may extend compliance with 

 sections 93115.8(a)(1)(A)1. through 4. up to four years provided: 

 a. The District determines that an engine meeting 

 sections 93115.8(A)1. through 4. would exceed the District's 

 threshold for significant risk pursuant to 

 H&SC section 44391 (AB 2588 "Hot Spots" Program), and 

 b. No later than four years after the applicable initial compliance date 

 for sections 93115.8(a)(1)(A)(1) through (4), one of the following is 

 installed: 

 (i.) an electric motor; 
35

 (ii.) an engine greater than 50 bhp but less than 75 bhp that does 

 not exceed 0.02 g/bhp-hr PM; or 

 (iii.) an engine greater than 75 bhp that does not exceed 

 0.01 g/bhp-hr diesel PM. 

(B) NMHC, NOx, and CO Standards: New agricultural stationary diesel-fueled 

Cl engines shall meet the HC, NOx, (or NMHC+NOx, if applicable) and CO 

standards for off-road engines of the same model year and maximum rated 

power, as specified in the Off-Road Compression Ignition Engine 

Standards (title 13, CCR, section 2423). If no limits have been established 

for an off-road engine of the same model year and maximum rated power 

as the new agricultural stationary diesel-fueled Cl engine, then the new 

agricultural stationary diesel-fueled Cl engine shall meet the Tier 1 

standards in title 13, CCR, section 2423, for an off-road engine of the same 

maximum rated power, irrespective of the new agricultural diesel-fueled Cl 

engine's model year. 

(2) Prior to January 1, 2008, the requirements of section 93115.8(a)(1) shall not 

 apply to any stationary diesel-fueled Cl engine that: 

 (A) is used in agricultural operations; and 

 (B) was funded under a State or federal incentive funding program; 

 and 

 (C) was sold for use in another agricultural operation, provided the 

 stationary diesel-fueled Cl engine complies with Tier II Off-Road 

 Compression Ignition Standards for off-road engines of the same 

 maximum rated power (title 13, CCR, section 2423). 

 For purposes of this subsection, State or federal incentive funding 

 programs include, but are not limited to, California's Carl Moyer Program, 

 as set forth in title 17, Part 5, Chapter 9 of the California Health and Safety 

 Code, and the U.S. Department of Agriculture's Environmental Quality 

 Incentives Program (EQIP), as set forth in title 7, Chapter XIV, Part 1466 of 

 the Code of Federal Regulations.

 

(b) Emission Standards for In-Use Stationary Diesel-Fueled CI Engines (>50 bhp) Used 

in Agricultural Operations. 

(1) Except as provided in sections 93115.3 and 93115.8(b)(5) through (7), no 

owner or operator shall operate an in-use stationary diesel-fueled CI engine 

greater than 50 bhp in an agricultural operation in California unless it meets the 

requirements in sections 93115.8(b)(2) through (4) (which are summarized in 

Tables 7 and 8): 
36

Table 7: Emission Standards Noncertified Greater than 50 BHP In-Use Stationary

Diesel-Fueled Engines Used in Agricultural Operations 

See sections 93115.8(b)(2) and (4) 

Horsepower 

Range 

(hp) 

Application Compliance 

On or After 

December 31 

Diesel PM 

Not to Exceed 

(g/bhp-hr) 

HC, NOx, 

NMHC+NOx, 

and CO 

Not to Exceed 

(g/bhp-hr) 

Greater Than 

50 But Less 

Than 75 

Generator Sets 2015 0.02 Off-Road CI 

Engine 

Certification 

Standards for an 

off-road engine 

of the model year 

and maximum 

rated power of 

the engine 

installed to meet 

the applicable 

PM standard.1

All Other 

Applications 

2011 0.30 

Greater Than 

or Equal to 75 

But Less 

Than 100 

Generator Sets 2015 0.01 

All Other 

Applications 

2011 0.30 

Greater Than 

or Equal to 

100 But Less 

Than 175 

Generator Sets 2015 0.01 

All Other 

Applications 

2010 0.22 

Greater Than 

or Equal to 

175 But Less 

Than or Equal 

to 750 

All Applications 2010 0.15 

Greater Than 

750 

All Applications 2014 0.075 

1. If no limits have been established for an off-road engine of the same model year and maximum 

rated power, then the in-use stationary diesel-fueled engine used in an agricultural operation 

shall not exceed Tier 1 standards in title 13, CCR, section 2423 for an off-road engine of the 

same maximum rated power irrespective of model year. 
37

Table 8: Emission Standards Tier 1- and Tier 2-Certified Greater than 50 BHP InUse Stationary Diesel-Fueled Engines Used in Agricultural Operations 

See sections 93115.8(b)(3) and (4)

dad Compliance 

On or After 

December 31 

Diesel PM 

Not to Exceed 

(g/bhp-hr) 

HC, NOx, 

NMHC+NOx, and CO 

Not to Exceed 

(g/bhp-hr) 

Greater Than 

50 But Less 

Than 75 

2015 or 12 years after 

the date of initial 

installation, whichever 

is later 

0.02 Off-Road CI Engine 

Certification 

Standards for an 

off-road engine of the 

model year and 

maximum rated power 

of the engine installed 

to meet the applicable 

PM standard.1

Greater Than 

or Equal to 75 

But Less Than 

175 

2015 or 12 years after 

the date of initial 

installation, whichever 

is later 

0.01 

Greater Than 

or Equal to 

175 But Less 

Than or Equal 

to 750 

2014 or 12 years after 

the date of initial 

installation, whichever 

is later 

0.01 

Greater Than 

750 

2014 or 12 years after 

the date of initial 

installation, whichever 

is later 

0.075 

1. If no limits have been established for an off-road engine of the same model year and maximum 

rated power, then the in-use stationary diesel-fueled engine used in an agricultural operation 

shall not exceed Tier 1 standards in title 13, CCR, section 2423 for an off-road engine of the 

same maximum rated power irrespective of model year. 

(2) Diesel PM Standards for Noncertified In-use Stationary Diesel-fueled CI 

 Engines Used in Agricultural Operations (except as provided in 

 section 93115.3):

(A) On or after December 31, 2015, no owner or operator shall operate any 

greater than 50 but less than 75 bhp noncertified stationary diesel-fueled 

generator set engine used in an agricultural operation unless such 

generator set engine's diesel PM emissions do not exceed 0.02 g/bhp-hr. 

(B) On or after December 31, 2015, no owner or operator shall operate any 

greater than or equal to 75 but less than 175 bhp noncertified stationary 

diesel-fueled generator set engine used in an agricultural operation unless 

such generator set engine's diesel PM emissions do not exceed 0.01 g/bhphr. 

(C) On or after December 31, 2011, no owner or operator shall operate any 

greater than 50 but less than 75 bhp noncertified stationary diesel-fueled 

engine (other than a generator set engine) used in an agricultural operation 

unless such engine's diesel PM emissions do not exceed 0.30 g/bhp-hr. 

 (D) On or after December 31, 2011, no owner or operator shall operate any 

 greater than or equal to 75 but less than 100 bhp noncertified stationary 

 diesel-fueled engine (other than a generator set engine) used in an 

 agricultural operation unless such engine's diesel PM emissions do not 

 exceed 0.30 g/bhp-hr. 
38

 (E) On or after December 31, 2010, no owner or operator shall operate any 

 greater than or equal to 100 but less than 175 bhp noncertified stationary 

 diesel-fueled engine (other than a generator set engine) used in an 

 agricultural operation unless such engine's diesel PM emissions do not 

 exceed 0.22 g/bhp-hr. 

 (F) On or after December 31, 2010, no owner or operator shall operate any 

 greater than or equal to 175 through 750 bhp noncertified stationary 

 diesel-fueled engine used in an agricultural operation unless such engine's 

 diesel PM emissions do not exceed 0.15 g/bhp-hr.

 (G) On or after December 31, 2014, no owner or operator shall operate any 

 greater than 750 bhp noncertified stationary diesel-fueled engine used in 

 an agricultural operation unless such engine's diesel PM emissions do not 

 exceed 0.075 g/bhp-hr. 

(3) Diesel PM Standards for Tier 1- and Tier 2-Certified In-use Stationary 

 Diesel-fueled Engines Used in Agricultural Operations (except as provided in 

 section 93115.3):

 (A) On or after December 31, 2015, or 12 years after the date of initial 

 installation, whichever is later, no owner or operator shall operate any 

 greater than 50 but less than 75 bhp Tier 1- or Tier 2-certified stationary 

 diesel-fueled engine used in an agricultural operation unless such engine's 

 diesel PM emissions do not exceed 0.02 g/bhp-hr.

(B) On or after December 31, 2015, or 12 years after the date of initial 

installation, whichever is later, no owner or operator shall operate any 

greater than or equal to 75 but less than 175 bhp Tier 1- or Tier 2-certified 

stationary diesel-fueled engine used in an agricultural operation unless 

such engine's diesel PM emissions do not exceed 0.01 g/bhp-hr. 

(C) On or after December 31, 2014, or 12 years after the date of initial 

 installation, whichever is later, no owner or operator shall operate any 

 greater than or equal to 175 through 750 bhp Tier 1- or Tier 2-certified 

 stationary diesel-fueled engine used in an agricultural operation unless 

 such engine's diesel PM emissions do not exceed 0.01 g/bhp-hr. 

 (D) On or after December 31, 2014 or 12 years after the date of initial 

 installation, whichever is later, no owner or operator shall operate any 

 greater than 750 bhp Tier 1- or Tier 2-certified stationary diesel-fueled 

 engine used in an agricultural operation unless such engine's diesel PM 

 emissions do not exceed 0.075 g/bhp-hr. 

(4) HC, NOx, NMHC+NOx, and CO Standards: An agricultural engine shall not 

 exceed the HC, NOx (or NMHC+NOx, if applicable) and CO standards for 

 off-road engines of the same model year and maximum rated power, as 

 specified in the Off-Road CI Engine Standards (title 13, CCR, section 2423). If 

 no limits have been established for an off-road engine of the same model year 

 and maximum rated power, then the in-use stationary diesel-fueled engine 

 used in an agricultural operation shall not exceed Tier 1 standards in title 13, 

 CCR, section 2423 for an off-road engine of the same maximum rated power 

 irrespective of model year. 
39

(5) The Executive Officer may extend the compliance dates in 

sections 93115.8(b)(1) through (4) up to one year, provided that verifiable 

information shows new engine packages for stationary diesel engine 

applications are not available in sufficient numbers or in a sufficient range of 

makes, models, and sizes to replace in-use stationary diesel agricultural 

engines.

(6) On a site-specific basis, a District may extend compliance dates in 

 sections 93115.8(b)(1), (2), and (4) up to four years provided: 

 (A) A District determines that an engine meeting 

 section 93115.8(b)(2) would exceed a District's threshold for significant 

 risk pursuant to H&SC section 44391 (AB 2588 "Hot Spots" Program), and 

 (B) No later than four years after the applicable initial compliance date 

 for section 93115.8(b)(2), one of the following is installed: 

 1. an electric motor; 

 2. an engine greater than 50 bhp but less than 75 bhp that does 

 not exceed 0.02 g/bhp-hr PM; or 

 3. an engine greater than 75 bhp that does not exceed 

 0.01 g/bhp-hr diesel PM. 

(7) A District may: 

 (A) Allow an owner or operator up to two additional years to 

 comply with sections 93115.8(b)(1) through (4), provided at least 60 days 

 prior to the applicable compliance date or dates, the owner or operator 

 submits to the District Air Pollution Control Officer documentation 

 demonstrating that an affected engine or engines shall be replaced with an 

 electric motor or electric motors within two years. Documentation for each 

 engine replaced shall include identification of the engine, the purchasing 

 agreement for the electric motor, and a copy of an agreement with a utility 

 distribution company to provide electricity if electricity is not already 

 available for electric motor operation. 

 (B) Establish more stringent diesel PM, NMHC+NOx, HC, NOx, and CO 

 emission limits, emission limit compliance dates, or other requirements. 

(c) Registration Requirements for Greater than 50 bhp Stationary Diesel-Fueled CI 

Agricultural Engines. 

(1) Registration Submittal. Except as provided in section 93115.2(a), the owner or 

 operator of a greater than 50 bhp stationary diesel-fueled CI agricultural engine 

 or engines shall submit the registration information specified in section (c)(2) 

 below to the District according to the following schedule: 

 (A) For each in-use stationary diesel-fueled CI agricultural engine, no later than 

 March 1, 2008; 

(B) For each new stationary diesel-fueled CI agricultural engine installed on or 

after March 1, 2008, no later than 90 days after the date of initial 

installation; and 

(C) For each new stationary diesel-fueled CI agricultural engine installed on or 

after January 1, 2005, but before March 1, 2008, within 90 days after initial 

installation or the effective date of amendments adding section 93115.8(c) 
40

to the ATCM, whichever is later. 

(2) Registration Information.

 (A) At minimum, the owner or operator shall submit the following information 

 for each greater than 50 bhp stationary diesel-fueled CI agricultural engine: 

 1. Date of registration application submittal; 

 2. Name, title (as applicable), and signature of person submitting the 

 registration application; 

 3. Name, address, mailing address (if differs from address), and 

 telephone number of the engine owner and of the operator, if the owner 

 is not also the operator; 

4. Date of installation or anticipated installation; 

 5. Year of manufacture or approximate age, if unable to determine year of 

 manufacture; 

 6. Make; 

 7. Model; 

 8. Serial number; 

 9. Maximum rated brake horsepower; 

 10. Certification status with respect to Off-Road CI Engine Certification 

 Standards (title 13, CCR, section 2423) (if available) 

 11. Estimated annual average operating hours; 

 12. Fuels Used; 

 13. Estimated annual average gallons of each fuel used, if alternative 

 diesel fuels are used; 

 14. Location including, but not limited to, one of the following: latitude and 

 longitude, universal trans meridian (UTM) coordinates, global 

 positioning satellite data (GPS), address, town and nearest cross 

 streets, parcel or plot number/designation, or other description that 

 clearly identifies the location of the engine; and 

 15. For an engine located within one-quarter mile of (1,320 feet) of a 

 residential area, school, or hospital: 

 a. Distance (in meters or feet) from engine to residential 

 area, school, or hospital; 

 b. Direction from engine to residential area, school, or 

 hospital; 

 c. Location of engine and residential area, school, or 

 hospital including one or more of the following for each: latitude 

 and longitude, universal trans meridian (UTM) coordinates, global 

 positioning satellite data (GPS), address, town and nearest cross 

 streets. 

(B) Any additional information required to evaluate the section 93115.3(a) 

exemption of an agricultural emergency standby generator set engine or a 

remotely-located agricultural engine from the requirements of 

section 93115.8(b). 

(3) The owner or operator of a stationary diesel-fueled CI agricultural engine 

registered under section 93115.8(c)(1) shall notify the District in writing no later 

than 14 days after any change of owner or operator, change in location, 
41

installation or commencement of an emissions control strategy, or replacement 

with an electric motor or noncompression ignition engine. 

(4) A District may provide stationary diesel-fueled CI agricultural engine owners 

 and operators with alternatives to section 93115.8(c)(1) through (3) 

 requirements, provided the Executive Officer finds such alternatives to be 

 equivalent to sections 93115.8(c)(1) through (3).

(5) Upon written request by the Executive Officer, an APCO shall provide to the 

Executive Officer a written report of information gathered under 

sections 93115.8(c)(1) through (4). 

(d) Fee Requirements for Greater than 50 bhp Stationary Diesel-Fueled CI Agricultural 

Engine Owners or Operators.

The owner or operator of a greater than 50 bhp stationary diesel-fueled CI agricultural 

engine or engines shall pay any fees assessed by the District for the purpose of 

recovering the District's cost of implementing and enforcing section 93115.8 

requirements, including section 93115.8(c) requirements. 

NOTE: Authority cited: Sections 39600, 39601, 39658, 39659, 39666, 41511 and 

43013, Health and Safety Code. Reference: Sections 39002, 39650, 39658, 39659, 

39666, 40000, 41511 and 43013, Health and Safety Code. 

§ 93115.9 ATCM for Stationary CI Engines – Emission Standards for New 

Stationary Diesel-Fueled Engines, Less Than or Equal to 50 Brake Horsepower 

(<50 bhp).

a. As of January 1, 2005, and prior to May 19, 2011, except as provided in section 

93115.3, no person shall sell, offer for sale, or lease for use in California any 

stationary diesel-fueled Cl engine that has a rated brake horsepower less than or 

equal to 50, unless the engine meets the current Off-Road Compression Ignition 

Engine Standards (title 13, CCR, section 2423) for PM, NMHC+NOx, and CO for 

diesel off-road engines of the same maximum rated power. 

b. As of May 19, 2011, except as provided in section 93115.3, no person shall sell, 

offer for sale, or lease for use in California any stationary diesel-fueled CI engine 

that has a rated brake horsepower less than or equal to 50 hp unless the stationary 

diesel-fueled CI engine meets the following applicable emission standards for the 

same maximum rated power and operation. 

1. New Prime Engines and New Emergency Standby Engines (less than 25 hp): 

(A) shall meet the current Off-Road Compression Ignition Engine Standards 

(title 13, CCR, section 2423) for PM, NMHC+NOx, and CO. 

2. New Emergency Standby Engines greater than or equal to 25 bhp but less than 

50 hp: 

(A) Shall meet the tier 4 interim Off-Road Compression Ignition Engine 

Standards (title 13, CCR, section 2423) for PM, NMHC+NOx, and CO. 

3. New Direct-Drive Fire Pump Engines