( Adopted: 01/23/12)

MDAQMD Rule 1160.1 1160.1-1 Internal Combustion Engines in Agricultural Operati ons 

## RULE 1160.1 Internal Combustion Engines in Agricultural Operati ons

(A) General

(1) Purpose:

(a) The purpose of this rule is to limit the emissi ons of Oxides of Nitrogen (NO x ), Carbon Monoxide (CO), and Volatile Organic Compo unds (VOC) from Internal Combustion Engines used in Agricultur al Operations.

(2) Applicability:

(a) This rule applies to any Internal Combustion En gine used in an Agricultural Operation with a Rated Brake Horsepowe r of fifty (50) or

more. 

### (B) Definitions

(1) “Agreement to Electrify ” – A binding, non-cancelable contract written by t he APCO and signed by the operator and the APCO within sixty (60) days of the date of adoption of this rule that commits the oper ator to complying with the requirements of subsection (C)(1)(a) or subsection (C)(1)(b) of this rule by electrifying.

(2) “Agricultural Operation ” – The growing and harvesting of crops or the rais ing of fowl or animals for the primary purpose of making a profit, providing a livelihood, or conducting agricultural research or instruction by an educational institution. Agricultural Operations do not includ e activities involving the processing or distribution of crops or fowl.

(3) “Air Pollution Control Officer” (APCO) – The Person appointed to the position of Air Pollution Control Officer of the District pursu ant to the provisions of California Health and Safety Code §40750 and his or her designee.

(4) “Airborne Toxic Control Measure (ATCM) for Stat ionary Compression Ignition Engines ” – The most recent version of the ATCM contained i n Title 17 of the California Code of Regulations §§93115 through 9311 5.15.

(5) “California Air Resources Board” (CARB) – The California State Air Resources Board, the powers and duties of which are described in Part 2 of Division 26 of the California Health & Safety Code (commencing wit h section 39500).

(6) “California Reformulated Gasoline ” – Gasoline meeting CARB requirements for motor vehicle fuel in accordance with California Co de of Regulations, Chapter 5, Article 1, Subarticle 2 - Standards for gasoline so ld beginning March 1, 1996.1160.1

- 2 MDAQMD Rule 1160.1 Internal Combustion Engines in Agricultural Operati ons (7) “Certified Compression-Ignited Engine ” – A Tier 1, Tier 2, Tier 3, or Tier 4 Compression-Ignited Engine that is USEPA certified as specified in Title 40 Code of Federal Regulations Part 89 or in Title 40 Code of Federal Regulations Part 1039.

(8) “Certified Spark-Ignited Engine ” – A Spark-Ignited engine that is used exclusively in Agricultural Operations and that is CARB certified as specified in Title 13, Division 3, Chapter 9, Article 4.5, Secti on 2433 of the California Code of Regulations and that has been certified to meet a certification level for hydrocarbon plus NO x emissions of 0.6 grams/bhp-hr (40.2 ppmv) or less.

(9) “Carbon Monoxide” (CO) – A colorless, odorless gas resulting from the incomplete combustion of hydrocarbon fuels.

(10) “Compression-Ignited Internal Combustion Engin e ” – An internal combustion engine with operating characteristics significantly similar to the theoretical diesel combustive cycle. The regulation of power by contr olling fuel supply in lieu of a throttle is indicative of a compression ignited eng ine.

(11) “De-rated Engine ” – An Internal Combustion Engine which has been ph ysically limited and restricted by permit condition to an op erational level of less than fifty (50) horsepower.

(12) “Diesel Engine ” – A Compression-Ignited Internal Combustion Engin e.
(13) “Disaster or State of Emergency ” – A fire, Flood, earthquake, or other similar natural catastrophe.

(14) “Emissions Unit ” – Any article, machine, equipment, other contriva nce or combination thereof which emits or has the potentia l to emit any Regulated Air Pollutant.

(15) “Exhaust Control ” – A device or technique used to treat an engine’s exhaust to reduce NO x , VOC, or CO emissions, and includes, but is not li mited to, catalysts, afterburners, reaction chambers, and chemical injec tors.
(16) “Facility ” – Any building, structure, Emissions Unit, combin ation of Emissions Units, or installation which emits or may emit a Re gulated Air Pollutant and which is:

(a) Located on one or more contiguous or adjacent p roperties within the District;

(b) Under the control of the same Person (or by Per sons under common control); and

(c) Belong to the same industrial grouping, as dete rmined by being within the same two digit Standard Industrial Classification C ode (SICC).MDAQMD Rule 1160.1 1160.1-3

Internal Combustion Engines in Agricultural Operati ons

(d) For the purpose of this regulation, such above- described grouping, remotely located but connected only by land carryin g a pipeline, shall not be considered one (1) Facility as defined in Rule 1 301 - Definitions

. (17) “Flood ” – A sudden and reasonably unforeseen rising and o verflowing of a body of water especially onto normally dry land.

(18) “Gaseous Fuel ” – A fuel which is a gas at standard conditions in cluding but not limited to natural gas, methane, ethane, propane, b utane and liquefied petroleum gas (LPG).

(19) “Installation Date ” – The date that an Internal Combustion Engine is initially placed at a Location in order to be operated for th e first time in its lifetime.

(20) “Intermittently-Used Engine ” – An engine that is used no more than 2400 total hours over its lifetime.

(21) “Internal Combustion Engine ” – An engine featuring intermittent combustion within one or more internal chambers to produce use ful work by applying a varying force against a reciprocating piston.

(22) “Lean-Burn Engine ” – Any Spark-Ignited Internal Combustion Engine th at is operated with an exhaust stream oxygen concentratio n of four (4) percent by volume, or greater prior to any exhaust stream cont rol device.

(23) “Location ” – Any single site at a building, structure, Facil ity, or installation.

(24) “Low-Use Engine ” – An engine that is used less than 200 hours per year, is a Tier 3 or cleaner engine (or is replaced not later than January 1, 2020), and generates a maximum potential health risk at any residential ar ea, school or hospital of less than ten (10) chances per million.

(25) “Mobile Agricultural Equipment ” – Equipment at an Agricultural Operation which is towed or mounted on a vehicle and is conti nuously moved during the operation of the equipment. Mobile Agricultural Eq uipment includes, but is not limited to sprayers, balers, and harvest equipment.

(26) “Oxides of Nitrogen” (NO x ) – Calculated as equivalent nitrogen dioxide (NO 2 ).

(27) “Public Utilities Commission (PUC) Quality Nat ural Gas ” – PUC Quality Natural Gas means high methane gas (at least eighty (80) pe rcent methane by volume) as specified in PUC General order 58-A.

(28) “Rated Brake Horsepower ” – The continuous brake horsepower rating specifie d for the engine by the manufacturer or listed on the nameplate of the unit, unless otherwise physically limited and specified by a con dition on the engine's permit or Rule 114 registration.1160.1

- 4 MDAQMD Rule 1160.1 Internal Combustion Engines in Agricultural Operati ons (29) “Regulated Air Pollutant ”

– Any of the following Air Pollutants:

(a) Any air pollutant, and its precursors, for whic h an Ambient Air Quality Standard has been promulgated.

(b) Any air pollutant that is subject to a standard under 42 U.S.C. §7411, Standards of Performance for New Stationary Sources (Federal Clean Air Act §111) or the regulations promulgated thereunder

. (c) Any substance which has been designated a Class I or Class II substance under 42 U.S.C. §7671a (Federal Clean Air Act §602) or the regulations promulgated thereunder.

(d) Any Air Pollutant subject to a standard or othe r requirement established pursuant to 42 U.S.C. §7412, Hazardous Air Pollutan ts (Federal Clean Air Act §112) or the regulations promulgated thereunder

. (30) “Remotely Located Engine ” – An engine that is at least one half (1/2) mile away from a residential area, school, or hospital.

(31) “Replacement Engine ” – An engine that is installed to replace an engin e that was in place as of June 16, 2005 and that such replacem ent is performed solely for the purpose of complying with the requirements of subse ction (C)(1) of this rule.

(32) “Rich-Burn Engine ” – Any Spark-Ignited Internal Combustion Engine th at is operated with an exhaust stream oxygen concentratio n of less than four (4) percent by volume prior to any Exhaust Control dev ice.

(33) “Spark-Ignited Internal Combustion Engine ” – A liquid or Gaseous Fueled engine designed to ignite its air/fuel mixture by a spark across a spark plug.

(34) “Tier 1 Engine, Tier 2 Engine, Tier 3 Engine, and Tier 4 Engine ” – A Compression-Ignited Engine that is certified to mee t the Tier 1, Tier 2, Tier 3, or Tier 4 Off-Road Compression-Ignited Certification S tandards as specified in title 13, California Code of Regulations, section 2423.

(35) “United States Environmental Protection Agency ” (USEPA) – The USEPA, the Administrator of the USEPA and his or her authorize d representative.

(36) “Volatile Organic Compound” (VOC) – Any compound of carbon, excluding carbon monoxide, carbon dioxide, carbonic acid, met allic carbides or carbonates, and ammonium carbonate, which participates in atmos pheric photochemical reactions other than those compounds listed in 40 C FR 51.100(s).

(37) “Waste Gas ” – An untreated, raw gas derived through a natural process, such as anaerobic digestion, from the decomposition of orga nic waste at municipal solid waste landfills or publicly owned wastewater treatm ent facility. Waste Gas includes landfill gas which is generated at landfil ls, digester gas which is generated at sewage treatment facilities, or a comb ination of the two.MDAQMD Rule 1160.1 1160.1-5

Internal Combustion Engines in Agricultural Operati ons (38) “Wind Machine ” – A machine consisting of a large fan mounted on a tower powered by an Internal Combustion Engine, used excl usively to provide protection to crops, including, but not limited to oranges, lemons, and grapes, from cold weather by effecting a heat transfer by m oving warmer atmospheric air downward and mixing it with the colder air surround ing a crop.


### (C) Requirements

(1) Engine Emission Standards and Compliance Schedu les

(a) Spark-Ignited Internal Combustion Engines

(i) Emission Limits/Standards:

The owner of a Spark-Ignited Internal Combustion En gine shall not operate it in such a manner that results in emi ssions exceeding the limits in Table 1 below.

Table 1 Emission Limits/Standards and Compliance Schedule f or a Spark-Ignited Internal Combustion Engine (corrected to fifteen (15) percent oxygen on a dry basis) Engine Type NO x CO VOC

Rich Burn 90 ppmv or

80% reduction 2000 ppmv 250 ppmv

Lean Burn 150 ppmv or

70% reduction 2000 ppmv 750 ppmv

(ii) Replacement Restriction: a. The owner of a Spark-Ignited Internal Combustion Engine shall not replace such engine with an engine that e mits more emissions of NO x , VOC, and CO, on a ppmv basis, (corrected to fifteen (15) percent oxygen on a dry basis) than the engine being replaced. (iii) Compliance Schedule: a. The owner of a Spark-Ignited Internal Combustion Engine that is subject to the requirements of this rule sh all be in full compliance with this rule not later than six ( 6) months after the date of adoption of this rule; or b. If the owner has an Agreement to Electrify, the owner shall be in full compliance with the requirements of this rule not later than eighteen (18) months after the date of a doption of this rule. (iv) Fuel Requirement: a. California Reformulated Gasoline, as defined in Title 13 California Code of Regulations, Chapter 5, article 1, subarticle 2, shall be used as the fuel for all gas oline-fired, Spark-Ignited Internal Combustion Engines.1160.1

- 6 MDAQMD Rule 1160.1 Internal Combustion Engines in Agricultural Operati ons (b) Compression-Ignited Internal Combustion Engines

(i) Emission Limits/Standards and Compliance Schedu les: a. The owner of a Compression-Ignited Internal Comb ustion Engine shall repower, replace or control the engine to comply with the applicable limits/standards and com pliance dates in the ATCM for Stationary Compression Igniti on Engines. (ii) Replacement Restriction: a. The owner of a Compression-Ignited Internal Comb ustion Engine that is subject to the requirements of subec tion (C)(1) shall not replace such engine with an engine , that emits more emissions of NO x , VOC, and CO, on a ppmv basis, (corrected to fifteen (15) percent oxygen on a dry basis) than the engine being replaced. (iii) Fuel Requirement: a. California ultra low sulfur diesel, as defined i n Title 13, California Code of Regulations, section 2281, or th e equivalent shall be used as the fuel for all liquid fired Compression-Ignited Engines.

(2) Submission of Emission Control Plan (ECP), Insp ection and Monitoring (I&M) Plan, and/or Authority to Construct (ATC) Applicati on.
(a) The owner of an engine that is required to subm it an ATC application, an ECP required pursuant to subsection (D)(2) or I&M P lan required pursuant to subsection (D)(3), shall submit the req uired document(s) no later sixty (60) days of the date of adoption of th is rule, or within sixty (60) days of becoming subject to this rule.


### (D) Administrative Requirements

(1) Permanent Removal of an Engine

The owner of an engine who elects to permanently re move the engine from service shall comply with all of the following cond itions:

(a) Comply with all applicable requirements of this rule until the engine is permanently removed from service;

(b) Submit a letter of intent to the APCO no later than fourteen (14) days before the engine is permanently removed from servi ce, stating the intent to permanently remove the engine from service. The engine removal letter can be submitted with the ECP for the Replacement E ngine, if any; and

(c) Permanently remove the engine from service and officially surrender the permit or Rule 114 registration to the APCO no late r than thirty (30) days after the engine is permanently removed from servic e.MDAQMD Rule 1160.1 1160.1-7

Internal Combustion Engines in Agricultural Operati ons (2) Emission Control Plan (ECP)

The owner of an engine subject to the requirements of subsection (C)(1), of this rule shall submit to the APCO an APCO-approvable EC P of all actions to be taken to satisfy the emission requirements of subsection (C)(1) within sixty (60) days of the engine becoming subject to this rule.

(a) The requirement to submit an ECP shall not appl y to an engine specified below:

(i) A Certified Spark-Ignited Engine that has not b een retrofitted with an Exhaust Control or catalytic emission control de vice and is in compliance with the requirements of subsection (C)( 1)(a); (ii) A Certified Compression-Ignited Engine that ha s not been retrofitted with an Exhaust Control and is in compl iance with the requirements of subsection (C)(1)(b); or (iii) An engine with an operating Exhaust Control s ystem that has been certified in accordance with subsection (D)(4) Exha ust Control System Certification Requirements.

(b) An ECP shall contain the following information, as applicable for each engine:

(i) Permit number, or Rule 114 registration number; (ii) Engine manufacturer; (iii) Model designation and engine serial number; (iv) Rated Brake Horsepower; (v) Type of fuel and type of ignition; (vi) Combustion type: Rich-Burn or Lean-Burn Engine ; (vii) Total hours of operation in the previous one (1) year period, including typical daily operating schedule; (viii) Fuel consumption (cubic feet for gas or gall ons for liquid) for the previous one (1) year period; (ix) Stack modifications to facilitate continuous i n-stack monitoring and to facilitate source testing; (x) Type of control to be applied, including in-stack m onitoring specifications; (xi) Applicable emission limits; (xii) Documentation showing existing emissions of N O x , VOC, and CO; and (xiii) Date that the engine will be in full complia nce with this rule. (xiv) The ECP shall identify the type of emission c ontrol device or technique to be applied to each engine and a constr uction/removal schedule, or shall provide support documentation su fficient to demonstrate that the engine is in compliance with t he emission requirements of this rule. (xv) For an engine being permanently removed from s ervice, the ECP shall include a letter of intent pursuant to subsec tion (D)(1).1160.1

- 8 MDAQMD Rule 1160.1 Internal Combustion Engines in Agricultural Operati ons (3) Inspection and Monitoring (I&M) Plan

The owner of an engine that is subject to the requi rements of subsection (C)(1), shall submit to the APCO for approval, an I&M Plan. The actions to be identified in the I&M Plan shall include, but are not limited to, the information specified below:

(a) The following engines are not required to submi t I&M Plans:

(i) A Certified Engine that has not been retrofitte d with an Exhaust Control and is in compliance with the requirements of subsection (C)(1). (ii) An engine with an operating Exhaust Control sy stem that has been certified in accordance with subsection (D)(4), Exh aust Control System Certification Requirements.

(b) Procedures requiring the owner or operator to e stablish ranges for control equipment parameters, engine operating parameters, and engine exhaust oxygen concentrations that source testing has shown result in pollutant concentrations within the rule limits.

(c) Procedures for monthly inspections as approved by the APCO. The applicable control equipment parameters and engine operating parameters will be inspected and monitored monthly in conforma nce with a regular inspection schedule listed in the I&M Plan.

(d) Procedures for the corrective actions on the no ncompliant parameter(s) that the owner or operator will take when an engine is found to be operating outside the acceptable range for control equipment parameters, engine operating parameters, and engine exhaust NO x , CO, VOC, or oxygen concentrations.

(e) Procedures for the owner or operator to notify the APCO when an engine is found to be operating outside the acceptable ran ge for control equipment parameters, engine operating parameters, and engine exhaust NO x , CO, VOC, or oxygen concentrations.

(f) Procedures for preventive and corrective mainte nance performed for the purpose of maintaining an engine in proper operatin g condition.

(g) Procedures and a schedule for using a portable NO x analyzer to take NO x emission readings pursuant to subsection (F)(6)(a)( iii).

(h) Procedures for collecting and recording require d data and other information in a form approved by the APCO includin g, but not limited to, data collected through the I&M Plan and the monitor ing systems described in section (F). Data collected through the I&M Pla n shall have retrieval capabilities as approved by the APCO.MDAQMD Rule 1160.1 1160.1-9

Internal Combustion Engines in Agricultural Operati ons

(i) Procedures for revising the I&M Plan. The I&M Plan shall be updated to reflect any change in operation. The I&M Plan shal l be updated prior to any planned change in operation. An engine owner t hat changes significant I&M Plan elements must notify the Distr ict no later than seven (7) days after the change and must submit an update d I&M Plan to the APCO no later than fourteen (14) days after the cha nge for approval. The date and time of the change to the I&M Plan shall b e recorded in the engine operating log. For new engines and modifica tions to existing engines, the I&M Plan shall be submitted to and app roved by the APCO prior to issuance of the permit or Rule 114 registr ation. The owner of an engine may request a change to the I&M Plan at any time.

(4) Exhaust Control System Certification Requiremen ts
(a) A system not certified by CARB shall be certifi ed by the APCO and comply with the requirements of subsections (D)(4)( b) through (D)(4)(c).

(b) To be considered for APCO certification, the ma nufacturer or operator shall comply with all of the following requirements :
(i) Certification shall be based upon the emission source testing results of a specific Exhaust Control system. (ii) A source testing protocol shall be submitted f or approval by the APCO prior to conducting the source test. The sour ce testing protocol approved by the APCO shall be strictly adh ered to during certification source testing. (iii) Source testing shall be conducted over the ra nge of operating parameters for which the unit(s) will be operated. (iv) The source testing results shall demonstrate c ompliance with the emission limits of this rule for each model of Exha ust Control system(s) to be certified. (v) The source testing procedure and reports shall be prepared by a CARB approved independent testing laboratory, and s hall contain all the elements identified in the APCO-approved so urce testing protocol. (vi) Source testing shall be conducted no more than ninety (90) days prior to the date of submission of request for cert ification by the APCO. (vii) Any additional supporting information require d by the APCO to address other performance parameters.

(c) The manufacturer or operator requesting certifi cation shall submit to the APCO the following information:

(i) Copies of the source testing results conducted pursuant to the requirements of subsection (D)(4)(b), and other per tinent technical data to demonstrate compliance with the emission li mits of this rule.1160.1

- 10 MDAQMD Rule 1160.1 Internal Combustion Engines in Agricultural Operati ons (ii) The applicant shall sign and date the statemen t attesting to the accuracy of all information in the statement. (iii) Name and address of the Exhaust Control syste m manufacturer or operator, brand name of the Exhaust Control unit, m odel number, and description of model of system(s) being certifi ed.

(d) The APCO will only approve an application for c ertification to the extent that the requirements of subsections (D)(4)(b) thro ugh (D)(4)(c) are met and the source testing results demonstrate that the emission limits of this rule are met.

(e) The APCO-approved certification is valid only f or the range of operating parameters and conditions for which certification i s issued.

(f) The APCO shall publish a list of certified Exha ust Control Systems after the certification process is completed.


### (E) Exemptions

(1) The requirements of this rule shall not apply t o the following engines:

(a) An engine used to propel implements of husbandr y, as that term is defined in section 36000 of the California Vehicle Code, as that section existed on January 1, 2003.

(b) An engine used exclusively to power a Wind Mach ine.

(c) A De-rated Engine less than 50 horsepower, prov ided the de-rating occurred before June 1, 2005.

(d) An engine used exclusively to power Mobile Agri cultural Equipment.

(2) Except for the requirements of subsection (F)(4 ), the requirements of this rule shall not apply to an Intermittently-Used Engine, L ow-Use Engine or Remotely Located Engine provided the District agricultural e ngine registration specifies the exempt status. In lieu of a non-resettable hour me ter, the owner of an emergency engine may use an alternative device, method, or te chnique, in determining operating time provided that the alternative is app roved by the APCO. The owner of the engine shall properly maintain and operate t he hour meter or alternative device in accordance with the manufacturer’s instru ctions.

(3) Except for the administrative requirements of s ubsection (F)(5)(b), the requirements of this rule shall not apply to an Int ernal Combustion Engine registered as a portable engines under the Statewid e Portable Equipment Registration Program pursuant to sections 2450-2465 , Article 5, Title 13, California Code of Regulations.MDAQMD Rule 1160.1 1160.1-11

Internal Combustion Engines in Agricultural Operati ons (4) Loss of Exemption

The owner of an engine which becomes subject to the emission limits/standards of this rule through loss of exemption shall not opera te the subject engine, except as required for obtaining a new or modified permit or Rule 114 registration for the engine, until the owner demonstrates that the subje ct engine is in full compliance with the requirements of this rule.


### (F) Monitoring and Recordkeeping Requirements

(1) Continuous Emissions Monitoring Systems (CEMS)

(a) All CEMS emissions measurements shall be averag ed over a period of fifteen (15) consecutive minutes. Any fifteen (15) consecutive minute block average CEMS measurement exceeding the applic able emission limits of this rule shall constitute a violation of this rule.

(2) Percent emission reductions, if used to comply with the NO x emission limits of subsection (C)(1), shall be calculated as follows:

(a) For engines with external control devices that are not operated in combination with a second emission control device o r technique, percent reduction shall be calculated using emission sample s taken at the inlet and outlet of the control device.

(b) For engines without external control devices an d for engines with an external control device in combination with a secon d emission control device or technique, percent reduction shall be bas ed on source test results for the uncontrolled engine and the engine after th e control device or technique has been employed. In this situation, th e engine’s typical operating parameters, loading, and duty cycle shall be documented and repeated at each successive post-control source tes t to ensure that the engine is meeting the percent reduction limit. Whe n representative source sampling prior to the application of an emissions c ontrol technology or technique is not available, the APCO may approve th e use of a manufacturer’s uncontrolled emissions information o r source sampling from a similar, uncontrolled engine.

(3) The owner of an Internal Combustion Engine that uses percent emission reduction to comply with the NO x emission limits of subsection (C)(1) shall provide an accessible inlet and outlet on the external control device or the engine as appropriate for taking emission samples and as appr oved by the APCO.

(4) Engine Monitoring Requirements

The owner of any engine subject to this rule shall:

(a) Properly operate and maintain each engine as re commended by the engine manufacturer or emission control system supplier.1160.1

- 12 MDAQMD Rule 1160.1 Internal Combustion Engines in Agricultural Operati ons (b) Monitor the operational characteristics of each engine as recommended by the engine manufacturer or emission control system supplier.

(c) Install and operate a non-resettable hour meter . In lieu of installing a nonresettable hour meter, the owner of an engine may u se an alternative device, method, or technique, in determining operat ing time provided that the alternative is approved by the APCO and CARB an d is allowed by permit or Rule 114 registration condition. The own er of the engine shall properly maintain and operate the hour meter or alt ernative device in accordance with the manufacturer’s instructions.

(d) The owner of an Spark-Ignited Internal Combusti on Engine that has been retrofitted with a NO x Exhaust Control that has not been certified in accordance with subsection (D)(4) Exhaust Control S ystem Certification Requirements, or a Compression-Ignited Engine that has been retrofitted with a NO x Exhaust Control shall use a portable NO x analyzer to take NO x emission readings to demonstrate compliance with th e emission requirements of subsection (C)(1), in compliance wi th the following:

(i) The owner of a Compression-Ignited Engine that is subject to the limits/standards of subsection (C)(1), shall use a portable NO x analyzer to take NO x emission readings at least once every six (6) months that the engine is operated. (ii) The owner of any other engine that has been re trofitted with a NO x Exhaust Control shall use a portable NO x analyzer to take NO x emission readings at least once every twenty-four ( 24) months that the engine is operated. (iii) All emission readings shall be taken with the engine operating either at conditions representative of normal opera tions or conditions specified in the permit or Rule 114 regi stration. (iv) The NO x analyzer shall be calibrated, maintained, and oper ated in accordance with the manufacturer’s specifications a nd recommendations or a protocol approved by the APCO. (v) All NO x emissions readings shall be reported to the APCO i n a manner approved by the APCO. (vi) NO x emission readings taken pursuant to this section s hall be averaged over a fifteen (15) consecutive-minute per iod by either taking a cumulative fifteen (15) consecutive-minute sample reading or by taking at least five (5) readings eve nly spaced out over the fifteen (15) consecutive-minute period. (vii) A NO x emission reading violation as determined by the po rtable NO x analyzer shall constitute a violation of this rule

. (5) Recordkeeping

(a) The owner of an engine subject to the requireme nts of subsection (C)(1) of this rule shall maintain an engine operating log to demonstrate compliance with this rule. This information shall be retained for a period of at least five (5) years, shall be readily available, and be made available to theMDAQMD Rule 1160.1 1160.1-13

Internal Combustion Engines in Agricultural Operati ons

APCO upon request. The engine operating log shall include, on a monthly basis, the following information:

(i) Total hours of operation; (ii) Type of fuel used; (iii) Maintenance or modifications performed; (iv) Monitoring data; (v) Compliance source test results; (vi) Any other information necessary to demonstrate compliance with this rule; and (vii) The quantity (cubic feet of gas or gallons of liquid) of fuel used.

(b) An owner claiming an exemption under subsection (E)(2) or subsection (E)(3) shall maintain annual operating records. Th is information shall be retained for at least five (5) years, shall be read ily available, and provided to the APCO upon request. The records shall includ e, but are not limited to, the following:

(i) Total hours of operation; (ii) The type of fuel used; (iii) The purpose for operating the engine; (iv) For Emergency Standby Engines, all hours of no n-emergency and emergency operation shall be reported; and (v) Other support documentation necessary to demons trate claim to the exemption.

(6) Compliance Testing

The owner of an engine subject to the requirements of subsection (C)(1), shall comply with the following requirements, except for an engine specified in subsection (D)(2)(a):

(a) Demonstrate compliance with applicable limits, ppmv or percent reduction, in accordance with the test methods in s ection (G), as specified below:

(i) By the applicable date specified in subsection (C)(1)(a), subsection (C)(1)(b), and at least once every twenty-four (24) months thereafter. (ii) By the applicable date specified in subsection (C)(1)(a), subsection (C)(1)(b), and at least once every sixty (60) month s thereafter, for a Spark-Ignited engine that has been retrofitted wi th a catalytic emission control device. (iii) A portable NO x analyzer may be used to show initial compliance with the applicable limits/standards in subsection (C)(1) for spark ignited engines, provided the following criteria ar e met, and a source test is conducted within twelve (12) months from the required compliance date.1160.1

- 14 MDAQMD Rule 1160.1 Internal Combustion Engines in Agricultural Operati ons a. A minimum of fifteen (15) minutes of runtime mus t be measured with data recorded at a minimum of fifteen (15), evenly spaced time intervals. Compliance is to be determined with the arithmetic average of the oxyge ncorrected data. b. The NO x analyzer shall be calibrated, maintained, and operated in accordance with the manufacturer’s specifications and recommendations or a protocol ap proved by the APCO. Analyzer calibration records shall be made available at the District’s request. c. The NO x analyzer shall be checked with USEPA protocol span gas at the beginning and end of each test day. The results of these checks shall be recorded and copie s submitted to the District with each engine test. I f the NO x analyzer exhibits more than a ten (10) percent devi ation from the span check, the instrument must be re-cali brated. Any analysis performed prior to an end-of-day span check failure shall be void. d. The test results of each engine, including span check results, shall be submitted to the District within thirty (30) days of the test date. Test results shall clearly identify the engine tested including owner, Location, permit or registration number, manufacturer, model, and seria l number. e. The NO x analyzer utilized for each check shall be clearly identified in the material submitted with the test results. Identification shall include manufacturer and seria l number of the analyzer used, and the last calibration date

. (b) Conduct emissions source testing with the engin e operating either at conditions representative of normal operations or c onditions specified in the permit or Rule 114 registration. For emissions source testing performed pursuant to subsection (F)(6) for the pur pose of determining compliance with an applicable standard or numerical limitation, the arithmetic average of three (3), thirty (30), conse cutive minute test runs shall apply. If two (2) of three (3) runs are abov e an applicable limit, the test cannot be used to demonstrate compliance with an applicable limit. VOC shall be reported as methane. VOC, NO x , and CO concentrations shall be reported in ppmv, corrected to fifteen (15 ) percent oxygen. For engines that comply with a percent reduction limit in Table 1, the percent reduction of NO x emissions shall also be reported.

(c) In addition to other information, the source te st protocol shall describe which critical parameters will be measured and how the appropriate range for these parameters shall be established. The ran ge for these parameters shall be incorporated into the I&M Plan.

(d) Engines that are limited by permit or Rule 114 registration condition to be fueled exclusively with Public Utilities Commission Quality Natural GasMDAQMD Rule 1160.1 1160.1-15

Internal Combustion Engines in Agricultural Operati ons

shall not be subject to the reoccurring source test requirements of subsection (F)(6) for VOC emissions.

(e) Representative Testing

For Spark-Ignited Internal Combustion Engines, in l ieu of compliance with the applicable requirements of subsection (F)( 6), compliance with the applicable emission limits in subsection (C)(1) sha ll be demonstrated by submittal of annual emission test results, within t hirty (30) days of the test date, to the District, from a unit or units that re presents a specified group of units, provided all of the following are require ments are satisfied:

(i) The units are located at the same Facility; (ii) The units were produced by the same manufactur er, have the same model number or other manufacturer’s designation in common, and have the same rated capacity and operating spec ifications; (iii) The units are operated and maintained in a si milar manner; and (iv) At least twenty (20) percent of the total numb er of units are tested during each annual test cycle. (v) The District, based on documentation submitted by the Facility: a. Determines that the margin of compliance for the identical units tested is significant and can be maintained o n an ongoing basis; or b. Determines based on a review of sufficient emiss ions data that, though the margin of compliance is not substa ntial, other factors allow for the determination that the variability of emissions for identical tested units is low enou gh for confidence that the untested unit will be in compli ance. These factors may include, but are not limited to, the following: 1. Historical records at the tested unit showing consistent invariant load; 2. Fuel characteristics yielding low variability an d therefore assurance that emissions will be constant and below allowable levels; and/or 3. Statistical analysis of a robust emissions data set demonstrates sufficiently low variability to convey assurance that the margin of compliance, though small, is reliable.

(f) Should any of the representative units exceed t he required emission limits, or if the District notifies the operator that the c riteria in subsection (F)(6)(e) has not been fulfilled, each of the units in the group shall individually demonstrate compliance by emissions te sting. Failure to complete emissions testing within ninety (90) days of the failed test shall result in the untested units being in violation of this rule. After compliance with the requirements of subsection (F)( 6)(e) has been demonstrated, subsequent source testing shall be pe rformed pursuant to subsections (F)(6)(a) through (F)(6)(c).1160.1

- 16 MDAQMD Rule 1160.1 Internal Combustion Engines in Agricultural Operati ons 

### (G) Test Methods

Compliance with the requirements of subsection (C)( 1) shall be determined, as required, in accordance with the following test procedures or any other method approved by USEPA and the APCO:

(1) Oxides of nitrogen - EPA Method 7E, or ARB Meth od 100.

(2) Carbon monoxide - EPA Method 10, or ARB Method 100.

(3) Stack gas oxygen - EPA Method 3 or 3A, or ARB M ethod 100.

(4) Volatile organic compounds - EPA Method 25A or 25B, or ARB Method 100.

(5) Operating horsepower determination - any method approved by EPA and the APCO.

See SIP Table at http://www.mdaqmd.ca.gov/Modules/S howDocument.aspx?documentid=45