Kids Blowing Bubbles

Frequently Asked Questions

We can help

Haven't found what you are looking for? Call or email Helpline for assistance.

Yes, the same provisions apply to TP-901.

It is the tank with the highest ratio of surface area to tank volume in the fuel tank family.

No. The engine or equipment must simply be operated for 15 minutes prior to hot soak.

The canister should be positioned in a position comparable to where it would normally be found on equipment.

Yes, the engine with complete evaporative emission control system can be tested without the equipment chassis.

Manufacturers may only use a different test fuel if pre-approved by the Executive Officer as part of an alternative test procedure.

Yes, CARB will accept data generated with Indolene Clear as referenced in 40 CFR 1065.710(c).

Any alternative test procedure shall only be used if prior written approval is obtained from the CARB. In order to secure the CARB's approval of alternative test procedures, the applicant is responsible for demonstrating to the CARB's satisfaction that the alternative test procedures are equivalent to the required test procedures. Alternative test procedures may be submitted to the following address:

California Air Resources Board
Monitoring Laboratory Division
P.O. Box 2815
Sacramento, CA 95812
Attn. Division Chief

California Code of Regulations, title 13, section 2766(a) provides an exemption from the requirements of section 2755 for metal tanks, coextruded multilayer tanks, and structurally integrated nylon tanks on SORE equipment with engine displacement less than 80 cc. Section 2755 contains the permeation emissions performance standard for equipment that use engines with displacement less than or equal to 80 cc.

This exemption does not apply to any fuel tank for use on SORE equipment with engine displacement greater than 80 cc. Permeation emissions data or the Executive Order number of a certified fuel tank must be provided in certification applications for equipment using engines with displacement greater than 80 cc meeting the design standards of Cal. Code 11/9/2015 Page 15 of 16 Regs., title 13, section 2754(b) beginnin

Yes. When it comes to using two carbon canisters on a separate two tank system, CARB approves the use of one canister for each separate tank as long as the canister’s working capacity is compatible to the size of the tank.

However, when it comes to using multiple canisters in sequence for one large fuel tank, CARB would require that the canister manufacturer apply for a new component EO under the innovative products program. Canisters in sequence must be tested per TP-902 and the working capacity data should be submitted with the request for a new component EO. As with single carbon canister EOs, the working capacity of the canisters in sequence should determine the maximum fuel tank capacity.

Yes it is acceptable to not use a contrasting color on a component label as long as the label is visible from 46 cm.

Yes it is acceptable for the component label to be obscured by another piece of the equipment as long as the equipment certification label is visible and states that the equipment is certified to California standards.

Manufacturers using a component whose EO has been revoked will be required to stop installing that component on engines or equipment once the 11/9/2015 Page 14 of 16 EO is revoked. If they are unable to substitute another certified component or otherwise meet the requirements set forth in sections 2754 through 2757 of the regulation, they can apply for a variance pursuant to section 2768.

The warranty covers the evaporative emission system components. The EO holder is responsible for all components. (See Cal. Code Regs., title 13, sections 2760(d) and 2764 of the regulation)

This is acceptable; however, the manufacturer applying for certification will ultimately be responsible. In other words, if Company A is the certification holder, but Company B's name is on the warranty statement, ARB will hold Company A responsible.

Yes. The fuel hose permeation requirement is not lowered when data is generated at test temperatures greater than 40 °C.

For component certification under Section 2767.1, CARB requires that emissions data from each of the five samples comply with the specified performance requirement. CARB will ensure that each data point is below the specified requirement and that the specified test method was used.

Section 2767.1 requires the manufacturer to submit emissions data from a minimum of 5 component samples. Multiple samples of a component that show compliance with specified performance requirements provide CARB with a greater assurance that the component will perform as intended.

An Executive Order can be issued for an individual component or for a range of component sizes. The manufacturer must specify the range in the request for component certification along with the minimum barrier thickness.

No. Section 2767.1 specifically requires a minimum of five samples.

No. A component Executive Order is valid until revoked.

In general, 13 CCR Section 2767.1 requires the manufacturer to submit supporting documentation that quantifies the emissions data from 5 component samples, including the test method(s) used to generate the data. The manufacturer needs to provide this information in a letter on company letterhead to CARB requesting component certification. An authorized company representative must sign the letter. The manufacturer should also submit a sample of the component, drawings, installation and maintenance instructions, and identify limits or conditions on component usage. The manufacturer may elect to provide additional information regarding the materials used in the design and construction of the component. The following requirements are specific to each type of component. Deviation from these requirements constitutes an alternative test procedure and requires pre-approval.

Fuel Hose Component Certification

  • Fuel hoses tested must have the smallest inside diameter for the production range;
  • Testing must be conducted at a constant 40C, or higher;
  • Test fuel used must be Cert fuel, Indolene, CE10, or CM15; and
  • Permeation rate must be measured following SAE J1737.

Fuel Tank Component Certification

  • Fuel tanks tested must have the smallest ratio of tank volume to internal surface area for the production range;
  • Testing must be conducted at a constant 40C ;
  • Test fuel used must be Phase II Cert fuel, Indolene, LEV III Certification Gasoline Fuel (E10) – with approval, or EPA Certification gasoline with 10 percent ethanol (IE10) – with approval; and
  • Permeation rate must be measured following TP-901.

Carbon Canister Component Certification

  • Working capacity must be measured following TP-902, including durability testing prior to measurement of working capacity;
  • Canister must be loaded with butane mixed 50/50 by volume with air or nitrogen; and
  • Manufacturer must specify the largest tank from which the carbon canister can control vapors and still meet the performance requirements in TP-902.

No. A manufacturer needs only to provide a letter, signed by an authorized Company representative, requesting component certification.

Yes, for SSIE and LSIE (<1 Liter) equipment, manufacturers may use a combined label for equipment that meets both U.S. EPA and ARB evaporative emission requirements. Manufacturers shall include all of the California label requirements per section 2759. Staff may also accept the addition of the following U.S. EPA information:

  1. For the label heading, “Emission Control Information” may be substituted for “Important Emissions Information.”
  2. For a design-based certification product label, the addition of “Using Certified Components” at the end of the compliance statement.
  3. For the combined compliance statement:

(Manufacturers may use a similar structure for SSIE exhaust and LSIE <1 Liter exhaust and evap labels.)

2009 and Later Model Years

For 2009 and later model years, the evaporative families that are certified under 11/9/2015 Page 10 of 16 the small production volume tank exemption must meet the following requirements:

  1. All units must be labeled in accordance with the FAQ 1-40 language:

  2. If the projected 50-state sales is <4000 units, manufacturers do not have to submit any additional documentation to demonstrate that their total California sales is 400 or fewer units (since manufacturers’ data suggests that typical California sales are less than 10 percent of 50-state sales).
  3. If the projected 50-state sales is ≥ 4000 units,
    1. Recommended Option: Manufacturers print and use up to 400 small production volume tank exemption labels only. In addition, a serial number must be included on each label to ensure that the total number of labels that are issued does not exceed 400 units.
    2. Alternatives: If manufacturers choose not to limit the small production volume tank exemption labels to 400 or fewer units, they are required to either i.) submit an annual year-end actual California sales report for a period of 5 years from the beginning of the specific model year, OR ii.) obtain prior CARB approval on an alternate method of assurance not presented in this response.

To assist in the certification process, manufacturers must provide a description of how they plan to demonstrate that their total California sales of a particular fuel tank is 400 or fewer units per model year in the Additional Comments page (item 66) of the certification application.

2006 – 2008 Model Years

Manufacturers who have already certified for 2006 and 2007 model years under the small production volume tank exemption do not have to submit any additional documentation.

Manufacturers who have applied or are applying for 2008 small production volume tank exemptions for their 50-state evaporative families and have projected 50-states sales ≥ 4000 units will be required to submit a year-end actual California sales report within 90 days after the end of the model year (no later than March 31, 2009). Manufacturers that have projected 50-states sales of <4000 units do not have to submit any additional documentation.

As per Section 2759, equipment manufacturers (and engine manufacturers where applicable) must include a label on their equipment indicating that the equipment conforms to California regulations. However, Section 2759(c)(4)(E), the unconditional statement of compliance, should read:


The requirements of Section 2759(c)(4)(A), (B), and (D) are still in effect for the label, as is the remainder of Section 2759.

13CCR, section 2754 states that approval by the Executive Officer is required if actively purging canisters that do not meet the requirements of the regulation, such as passively purged carbon canisters, are used.

A manufacturer can certify to the performance standards of 13CCR, section 2754 (a), or to the design standards of 13 CCR section 2754 (b) with a passively purged carbon canister if the Executive Officer approves the running loss determination before the certification process. For a manufacturer certifying a passively purged system, adequate test data must be included in the certification application that allows an engineer to conclude that running loss emissions are not freely emitted into the atmosphere unattenuated during engine operation. At a minimum, the running loss demonstration test data needs to show that the evaporative system could handle a running loss event after repeated diurnal cycles and is:

  • designed to control running loss emissions from being emitted into the atmosphere
    • Data example 1: For a carbon canister controlled fuel tank design, provide carbon canister capture and loss gravimetric measurements before and after a running loss event
    • Data example 2: Ambient and fuel tank head space pressure and vacuum measurements throughout a running loss event
  • Designed in a manner that protects the system from exposure to liquid fuel, extreme temperatures or pressures, or other conditions that would make the system less efficient or inoperable
    • Design example 1: Evidence fuel slosh is not interfering with carbon canister performance
    • Design example 2: Temperature shielding or air flow benefiting the evaporative emissions system
  • A CARB control number will be assigned to each approved running loss determination and should be referenced in a SORE equipment Executive Order 11/9/2015 Page 9 of 16 application. The running loss determination Executive Officer approval request package is sent to:
               Catherine Dunwoody, Chief
               Monitoring and Laboratory Division
               Air Resources Board
               P.O. Box 2815
               Sacramento, CA 95812

    At a minimum, the package should include a letter requesting the running loss determination, a functional description of the evaporative emission system, the test procedure, the test data, and an interpretation of the test results.


Active purge refers to the ambient air being drawn through a carbon canister by a vacuum created by the intake system. Passive purge refers to ambient air being drawn through a carbon canister by the vacuum created by normal diurnal temperature variations of the fuel tank temperature.

No, a manufacturer can choose a different CARB approved fuel for evaporative testing than the one used for exhaust testing.

An appropriate default equipment volume for SHED testing would be 3 ft3 for class I engines and 5 ft3 for class II engines.

Yes. According to 13 CCR 2759(a), emissions related and emissions critical parts must be properly labeled in order to identify equipment that meets applicable evaporative standards.

No, nominal fuel tank capacity excludes un-useable volume.

The engine manufacturer declares the maximum power rating in the exhaust certification submission.

The certificate holder is responsible for communicating to the producer of the finished product the terms of compliance with the Executive Order. The finished product can include configurations that emit at lower levels (e.g. smaller fuel tanks, larger capacity canisters) than the worst case tested and documented in the certification submission.

Not until the 2006 engine manufacturer model year.

CARB uses the detailed information for emissions inventory calculations.

Yes. A manufacturer may report just the base engine/equipment model(s), provided all variations of the base model are equipped with identical evaporative controls. The naming convention for base engine/equipment model(s) reported must contain sufficient common identifiers to associate specific model variation to its appropriate base model. For design based certification, manufacturers must report the component(s) (via reporting the component Executive Order number) associated with each engine model in the Model Summary page of the certification application.

13 CCR 2759 (c)(4)(C) applies here. Fuel hose should be acceptable for 2006 MY equipment.

13 CCR Section 2759 (h) applies here. Although ARB can approve alternate labels, the manufacturer must have the DOM listed on the emission label.

13 CCR Section 2759 (h) applies here. Although ARB can approve alternate labels, the manufacturer must have the DOM listed on the emission label.

The retest must be performed on the same engine and/or equipment that generated the original test results. No additional preconditioning is required if the fuel system has continuously contained fuel subsequent to the original test.

Good engineering practices are used to calculate surface areas for irregular shaped tanks.

A list of these equipment types is provided on the following webpage: The federal Clean Air Act prohibits California from regulating new construction or farm equipment rated below 175 horsepower. Definitions for construction equipment and farm equipment are given in 40 CFR Part 1074.5. The equipment types that are in these categories are therefore called “preempt.”

In years that you are required to meet fuel hose permeation standards only, the evaporative family code can be omitted from the label. However, the label must still contain an unconditional statement of compliance for evaporative emissions.

The effective date applies to the model year of the generator.

Yes, 13 CCR Section 2753 (d) applies.

Yes. However, the first two characters of the evaporative family code must be as specified by CP-902.

As defined in Cal. Code Regs., title 13, section 2752(a)(9), “Evaporative Family” means a class of off-road engines or equipment that are grouped together based on similar fuel system characteristics as they relate to evaporative emissions. For equipment less than or equal to 80 cc, the engine family and evaporative family are considered equivalent. For integrated equipment greater than 80 cc the engine family and the evaporative family may be considered equivalent at the manufacturer’s discretion

Footnote 4 was inadvertently removed from proposed 15-day modifications, published May 14, 2004, when the regulations were finally approved by the Office of Administrative Law. The footnote read as follows: “4 Applies to small production volume tanks exempted pursuant to section 2766.”

Yes. For the model years when only a low permeation hose is required, the manufacturer can omit the evaporative code from the label. However, the label must still contain an unconditional statement of compliance.

Manufacturers meeting the small production volume exemption in Section 2766 must certify equipment annually pursuant to Section 2753 (d). However, equipment is not required to be configured with low permeation fuel hoses and carbon canisters or conform to fuel cap performance standards until model year 2010.

No. Compression-ignited engines are not regulated in the small offroad engine regulations.

No. The staff report and the final statement of reasons clearly describes ARB’s intent to only allow the exemption for engines greater than or equal to 225 cc.

Yes, running loss emissions that are combusted are considered controlled.

Yes.  Any changes to a certified evaporative emission control system will require the certification holder to submit a running change request.

No. The regulations do not specify the technology that must be used.

For equipment manufactured prior to or during a specific model year, the engine or equipment must comply with the respective exhaust and evaporative standards in effect for that model year in which it was produced. In the example described above, as long as the 2007 model year engine was compliant with the 2007 model year exhaust standards, and the 2008 model year equipment is compliant with 2008 model year evaporative requirements, a 2008 model year evaporative certification could be issued for the equipment.

The EMEL and EFELD are only applicable when a manufacturer is participating in the averaging and banking provisions of section 2754.1. When a manufacturer chooses to certify engines using the regulatory provisions for averaging and banking, the level being certified is the EFELD and not the EMEL. However, the EMEL for each model is the model’s effective emission standard.

Yes. Manufacturers can use an integrated exhaust and evaporative label with the last two characters of the exhaust family code representing the evaporative family.

Although this is not a requirement, a fuel cap manufacturer may voluntarily choose to request an CARB approval number (not a component EO) for their fuel cap design if they are selling the same fuel cap to a number of equipment manufacturers. Then, the fuel cap manufacturer can provide the equipment manufacturer with the CARB approval number to list in their certification application instead of providing the design diagram. For fuel cap manufacturers that would like to request an CARB approval number for their fuel cap design, please provide a letter along with the supporting information specified in Question 1-5.a above to the following address: Ms. Annette Hebert, Chief Emissions Compliance, Automotive Regulations and Science Division 9480 Telstar Ave., Suite 4 El Monte, CA 91731

The intent of 13 CCR 2756(a) is to ensure that the fuel cap remains attached to the tank, equipment, or engine for the full useful life of the small offroad engine or equipment under normal use. To meet the requirement of 13 CCR 2756(b), a description and an evaluation of how the user feedback and vapor seal are established should be included in the certification application. Fuel caps used on systems that pass a diurnal performance test are considered compliant with the vapor seal requirement. In the certification application, the manufacturer must describe how their fuel cap meets the performance standards in 13 CCR 2756(a) and 2756(b) by providing a design diagram. Please provide the fuel cap description on page 42 for performance-based, page 44 for design-based, and page 46 for small production volume tank manufacturers. If necessary, CARB may request manufacturers to submit fuel cap and tether samples for evaluation. As an alternative, if an equipment manufacturer is using the same fuel cap design in a number of certification applications, they may choose to submit the fuel cap design to DMS once and get an CARB approval number (not a component EO) for that specific design. Then, as long as there are no changes, manufacturers can just list the CARB approval number on future applications instead of providing the design diagram.

Yes. In any case where a manufacturer applies for engine and equipment certification and uses a carbon canister that meets the requirements of the regulations, the manufacturer must still provide an engineering description of the evaporative emission system as part of the certification application. The description should describe how vented tank emissions are prevented from being emitted into the atmosphere during engine operation. In addition, Executive Officer approval is required for running loss determinations on evaporative emissions systems using a passive carbon canister. Test data is necessar

There are no specific requirements to control emissions from the carburetor. However, controlling the emissions from the carburetor will provide a greater margin of compliance.

These can be a significant source of permeation emissions if uncontrolled. Vapor hoses are not required to meet the 15 g/m2 /day permeation standard. However, CARB recommends using vapor hoses that do meet the standard to minimize emissions.

No. However, the end user is prohibited from tampering with certified control systems pursuant to California Health and Safety Code Section 43008.6.


Have you ever wondered what a baghouse is or what NMOG stands for?