RICE NESHAP Applicability Tool After reading the information on this page, use the RICE NESHAP Tool to determine the federal requirements for your unit. Workshop/Webinar: EPA's New Air Quality Regulations for Reciprocating Internal Combustion Engines (RICE); Jan. 11 & 18, 2012. More information.

Stationary Reciprocating Internal Combustion Engines (RICE)

A stationary reciprocating internal combustion engine (RICE) is any internal combustion engine which uses reciprocating motion to convert heat energy into mechanical work and is not mobile. Stationary reciprocating engines differ from mobile reciprocating engines in that they are not used in road vehicles or nonroad mobile applications such as tractors, bulldozers, mowers, cranes, etc. Some engines are less easily categorized, for example, a generator mounted on a pallet or a trailer would not be considered stationary unless it will stay at a single site for at least a full year or full season, for a seasonal source (more information on stationary, nonroad, transportable, etc.).

There are two basic types of stationary reciprocating engines - spark ignition and compression ignition. Spark ignition engines use a spark (across a spark plug) to ignite a compressed fuel-air mixture. Typical fuels for such engines are gasoline and natural gas. Compression ignition engines compress air to a high pressure, heating the air to the ignition temperature of the fuel, which then is injected. The high compression ratio used for compression ignition engines results in a higher efficiency than is possible with spark ignition engines. Diesel fuel oil is normally used in compression ignition engines, although some are dual-fueled (natural gas is compressed with the combustion air and diesel oil is injected at the top of the compression stroke to initiate combustion).

Several million stationary reciprocating engines are in use throughout the U.S. In general industry, these engines provide shaft power to drive process equipment, compressors, pumps, standby generator sets and other machinery. Agricultural uses are similar, with many engines driving irrigation pumps. Reciprocating engines find wide application in municipal water supply and wastewater treatment and in commercial and institutional emergency power generation.

The information below is organized by the following topics:

• Air Regulations
  • Standards of Performance for Stationary Spark Ignition Internal Combustion Engines (40 CFR 60 Subpart JJJJ)
  • Standards of Performance for Stationary Compression Ignition Internal Combustion Engines (40 CFR 60 Subpart IIII)
  • National Emission Standards for Hazardous Air Pollutants (NESHAP) for Reciprocating Internal Combustion Engines (40 CFR 63 Subpart ZZZZ)
• Spill Prevention, Control and Counter Measures
• Other Resources

Air Regulations

Manufacturers and owners of stationary reciprocating internal combustion engines (RICE) are affected by federal air pollution regulations promulgated in stages starting in 2004. These include standards, called New Source Performance Standards (NSPS) for both stationary spark and compression (diesel) ignition engines. Specifically they are:

• Standards of Performance for Stationary Spark Ignition Internal Combustion Engines (40 CFR 60 Subpart JJJJ),
• Standards of Performance for Stationary Compression Ignition Internal Combustion Engines (40 CFR 60 Subpart IIII)
• National Emission Standards for Hazardous Air Pollutants (NESHAP) for Reciprocating Internal Combustion Engines (RICE) (40 CFR 63 Subpart ZZZZ)
  

Overview. These rules became effective on March 18, 2008, and apply to new, modified and reconstructed stationary spark ignition (SI) internal combustion engines (ICE), regardless of size and combusting any fuel. This rule does not apply to combustion turbines. Emissions are controlled to levels achievable by Best Demonstrated Technology (BDT). The regulated pollutants are NOX, CO and VOC, plus a sulfur limit on gasoline.
For engine owners/operators the NSPS rules include two alternative compliance approaches:

1. Comply by purchasing an engine certified by the manufacturer.
2. Comply by meeting emission limits for an engine not certified by the manufacturer.

Who do the SI rules apply to?

• Manufacturers of stationary SI engines
• Remanufactures of stationary SI engines
• Owners/Operators of stationary SI engines

What are the SI standards?

Emission Standards for Manufactures. Tables 1 and 2 outline the emissions standards that manufacturers must certify that their engines meet.

Table 1. NOX, HC, NMHC and CO Emission Standards for Manufacturers Stationary SI Engines ≤19 kW (25 hp) Manufactured after July 1, 2008.

Table 2. NOX, HC, NMHC and CO Emission Standards for Manufacturers of Stationary Non-Emergency SI Gasoline Engines >19 kW (25 hp) and Rich Burn LPG Engines >19 kW (25 hp)

Notes:

Gasoline-fired SI engines must use gasoline meeting the requirements of 40 CFR 80.195 (regulation of fuels and fuel additives), including a maximum sulfur content of 80 ppm.

Manufacturers of gasoline or LPG rich burn emergency engines must certify such units to the standards in 40 CFR Part 90 (<130 hp) or Part 1048 (≥130 hp).

Emission Standards for Remanufactures. The final NSPS standards (from tables above) also apply to stationary engines manufactured before July 1, 2007 for hp > 500 or July 1, 2008 for hp 25<hp<500 that have been modified or reconstructed after June 12, 2006. For the purposes of this NSPS, a stationary engine that has been overhauled as part of a maintenance program is not considered to have been modified if there is no increase in the engine's emissions.

Emission Standards for Owners/Operators. Tables 3 and 4 apply to owners and operators of the specified engine types that commence construction after June 12, 2006 and that are manufactured after the applicable dates. For the purposes of this NSPS, the date that construction commences is that date the engine is ordered by the owner or operator.

Table 3. NOX, HC, NMHC and CO Emission Standards for Owners/Operators of Stationary Non-Emergency SI Natural Gas Engines 19<kW<75 (25<hp<100) and Lean Burn LPG Engines 19<kW<75 (25<hp<100)

[Optional manufacturer certification]

Table 4. NOX, CO and VOC Emission Standards for Owners/Operators of Stationary Non-Emergency SI Engines ≥100 hp (except gasoline and rich burn LPG), Stationary SI Landfill/Digester Gas Engines, Stationary Emergency >25hp

[Optional manufacturer certification]

Notes:

The emission standards applicable to emergency engines between 25 HP and 130 HP are in terms of NOx+HC.

Owners and operators of stationary non-certified SI engines may choose to comply with the emission standards in units of either g/HP-hr or ppmvd at 15 percent O2.

What are the SI compliance requirements?

The following summarizes requirements for manufacturers and owners and operators of Stationary Spark Ignition Internal Combustion Engines (SI ICE).

Manufacturers. Manufacturers that are required to certify their engines must follow the certification and testing procedures in 40 CFR Part 90 or 1048, as applicable.

Owners/Operators. Owners/operators using any engines ≤25 hp or gasoline or rich burn LPG engines >25 hp must demonstrate compliance by using engines certified under 40 CFR Part 90 or 1048, as applicable.

Owners/operators using engines >25 hp using fuels other than gasoline and that are not rich burn LPG engines >25 hp must demonstrate compliance by either using an engine certified to the applicable standards or by conducting an initial performance test (some engine sizes require periodic performance tests).

Owners/operators must keep maintenance records for all engines subject to the NSPS, and a Maintenance Plan is required for non-certified engines, including certified engines operating in a non-certified manner. Owners/operators of certified engines who do not follow the manufacturer's emission-related operation & maintenance procedures are considered to be operating non-certified engines, subject to performance testing.

Owners/operators of certified engines <100 hp that are operating in a non-certified manner are not required to conduct performance tests; however, owners/operators are required to maintain and operate the engines in a manner consistent with good practices to minimize emissions.

Owners/operators of certified engines ≥100 hp≤500 that are operating in a non-certified manner must conduct performance tests within the first year of engine operation.

Owners/operators operating certified engines >500 hp in a non-certified manner must conduct performance tests within the first year of operation and every 8760 hours of operation or 3 years thereafter, whichever comes first.

Recordkeeping and Reporting Requirements

NSPS Subpart JJJJ recordkeeping and reporting requirements include:

• Owners/operators of all engines are required to maintain records of proper maintenance and non-certified engines must have a maintenance plan.
• Initial notification is required for engines >500 hp that are non-certified.
• Owners/operators of emergency engines are required to keep records of their hours of operation.
• Owners/operators who are required to conduct performance testing on engines must report the results within 60 days of each performance test.
  

[Note: Compression Ignition Engines Are Virtually Always Diesel-fired Engines]

Overview. On July 11, 2006, the Environmental Protection Agency (EPA) published a rule to reduce emissions of air pollutants from stationary compression ignition (CI) internal combustion engines (stationary diesel engines). These new standards, known as New Source Performance Standards (NSPS), limit emissions of nitrogen oxides (NOx), particulate matter (PM), carbon monoxide (CO), and non-methane hydrocarbons (NMHC) from stationary diesel internal combustion engines. Sulfur oxides (SOx) will also be controlled through the use of low sulfur fuel. The emissions standards are generally modeled after EPA's standards for nonroad and marine diesel engines.

For engine owners/operators the NSPS rules include two alternative compliance approaches:

1. Comply by purchasing an engine certified by the manufacturer.
2. Comply by meeting emission limits for an engine not certified by the manufacturer.

Who do CI rules apply to?

• Manufacturers of 2007 and later model year compression ignition (CI) ICE with a displacement of less than 30 liters per cylinder and certain model year fire pump engines.
• Owners/Operators of stationary compression ignition internal combustion engines (CI ICE) that commence construction, reconstruction, or modification after July 11, 2005.
  

Exceptions:

• Stationary CI ICE manufactured prior to April 1, 2006, that are not fire pump engines are not subject to the final rule, unless the engines are modified or reconstructed after July 11,2005.

Does not apply to:

• Stationary CI ICE being tested at a stationary CI ICE test cell/stand
• Owners and operators, as well as manufacturers, may be eligible to request an exemption for national security
• ICE's exempt per 40 CFR parts 1068, subpart C, 89, subpart J, or 94, subpart J

What are the CI standards?

Fuel standards for Owners/Operators.For owners/operators of a CI ICE (40 CFR 60.4207) the following fuel standards apply:

• Beginning Oct. 1, 2007- Low Sulfur Diesel (LSD) 500 ppm may only be used in subject engines. (40 CFR 80.510 (a))
• Beginning Oct. 1, 2010- CI ICE's with a displacement of <30 liters per cylinder, only Ultra Low Sulfur Diesel (ULSD) 15 ppm may be used. (40 CFR 80.510(b))
• Beginning June 1, 2012, owners and operators of stationary CI ICE with a displacement of greater than or equal to 30 liters per cylinder must purchase fuel that meets a maximum per-gallon sulfur content of 1,000 parts per million (ppm).

Emission Standards for Owners/Operators. Table 5 shows emission standards for owners/operators of CI ICE.

Table 5. Emission Standards for Owners and Operators of Stationary CI ICE

Emission Standards for Manufacturers. Stationary CI ICE manufacturers must certify their 2007 model year and later engines with a displacement of <30l/cyl. See Table 6 for an overview. To read more about emission standards for manufacturers see the rule, or contact the Small Business Assistance Program for details.

Table 6. Emission Standards for Manufacturers of CI ICE

What are the CI compliance requirements?

Documentation. CI ICE owners/operators are required to have documentation to demonstrate compliance. Required compliance documentation for non-emergency or fire pump engines is shown in Table 7.

Table 7. CI ICE Owner/Operator Required Documentation

Monitoring Requirements. The following are monitoring requirements for owner and operators of an CI ICE (40 CFR 60.4209):

• Emergency engine – must install non-resettable hour meter prior to startup
• For diesel particulate filter – must install a backpressure monitor

Recordkeeping and Reporting Requirements

There are notification, reports, and record keeping requirements if you are an owner/operator of a CI ICE (40 CFR 60.4214).

Initial Notification is required if a non-emergency ICE falls in the following category:

• Non-emergency stationary CI ICE that are greater than 3,000 HP or;
• Have a displacement of greater than or equal to10 liters per cylinder or;
• Are pre-2007 model year engines that are greater than 175 HP and not certified.

The Initial Notification must be submitted to EPA's Administrator and must include the following:

• Name and address of the owner or operator
• The address of the source
• Engine info (make, model, engine family, serial number, model year maximum engine power, and engine displacement
• Emission control equipment
• Fuel used.

Emergency stationary CI ICE notification requirements are:

• No initial notification
• Must maintain records of operation of engine in emergency and non-emergency service (e.g., maintenance) as recorded with the non-resettable hour meter
  
  

National Emission Standards for Hazardous Air Pollutants for Reciprocating Internal Combustion Engines (RICE)

Overview. In addition to the New Source Performance Standards (NSPS) rules for Stationary ICE, there are National Emissions Standards for Hazardous Waste (NESHAP) that regulate emissions from all sizes of stationary reciprocating internal combustion engines (RICE) at both major and area sources of hazardous air pollutants. EPA estimates that more than 1 million stationary reciprocating internal combustion engines are covered by the RICE NESHAP rule, including engines used for:

• Power generation (including emergency backup power)
• Oil and gas production and transmission
• Pumping water (wastewater, irrigation, fire suppression)
• Industrial process (compressors, rock crushers, welders)

• In 2004, EPA promulgated rules covering engines greater than 500 HP located at major sources (Federal Register, June 15, 2004).
• In 2008 EPA promulgated rules covering new engines less than or equal to 500 HP located at major sources plus all new engines at area sources (Federal Register, January 18, 2008).
• In 2010, EPA promulgated rules covering existing engines less than or equal to 500 HP located at major sources, all existing engines at area sources, and existing non-emergency compression-ignition (CI) engines greater than 500 HP at major sources. The 2010 final rules included:
  • National Emission Standards for Hazardous Air Pollutants for Compression-Ignition (Diesel) Reciprocating Internal Combustion Engines (CI RICE) (Federal Register, March 3, 2010).
  • National Emission Standards for Hazardous Air Pollutants for Spark-Ignition (Natural Gas) Reciprocating Internal Combustion Engines (SI RICE) (Federal Register, August 20, 2010).

Who do the RICE NESHAP rules apply to?

A diagram summarizing the applicability of the various EPA rulings regarding RICE NESHAP is shown in Figure 1.

Figure 1. Affected Sectors of the 2004, 2008 and 2010 RICE Rules Promulgated by EPA

Key RICE NESHAP Dates: Initial applicability notifications for engines subject to 2010 amendments were due by: August 31, 2010: Existing CI RICE February 16, 2011: Existing SI RICE Compliance dates: June 15, 2007: Existing RICE >500 HP at major sources (except non-emergency CI >500 HP at major sources) May 3, 2013: Existing CI RICE (except emergency CI >500 HP at major sources October 19, 2013: Existing SI RICE ≤500 HP at major sources and all HP at area sources Upon startup for new engines

RICE NESHAP is applicable to the following engine sizes, manufacture date, and location:

• Engines >500 HP at major source
  • Existing if constructed before December 19, 2002
  • New if constructed on or after December 19, 2002
  • Reconstructed if reconstruction began after December 19, 2002
• Engines ≤500 HP located at major source of HAP, and engines of all HP located at an area source of HAP
  • Existing if constructed before June 12, 2006
  • New if constructed on or after June 12, 2006
  • Reconstructed if reconstruction began after June 12, 2006
• Existing emergency engines located at residential, institutional, or commercial area sources are not covered
• Engine must meet subpart ZZZZ definition of emergency engine

What are the RICE NESHAP standards?

The following provides information on the latest EPA regulatory actions; the rulings promulgated on March 3, 2010 and August 20, 2010 for both spark ignition (SI) and compression ignition (CI) reciprocating internal combustion engines (RICE).

CI RICE NESHAP.

In February, 2010, the EPA provided a final ruling on NESHAP for RICE. This ruling affects existing stationary diesel engines. Final compliance is May 3, 2013. However, an initial notification of applicability needs to be received by the EPA before August 31, 2010.

The rule is intended to reduce emissions of toxic air pollutants such as formaldehyde, acetaldehyde, acrolein, methanol and other air toxics from several categories of previously unregulated stationary engines.

The rule is applicable to following categories of diesel engines:

• Engines used at "area sources" of air toxics emissions and constructed or reconstructed before June 12, 2006
• Engines used at "major sources" of air toxics emissions, have a site rating of less than or equal to 500 hp, and constructed or reconstructed before June 12, 2006
• Engines used at "major sources" of air toxics for non-emergency purposes, have a site rating of greater than 500 hp, and constructed or reconstructed before December 19, 2002

"Major sources" of air toxics are defined as those that emit 10 tons per year of a single air toxic or 25 tons per year of combined air toxics. "Area sources" are those sources that are not "major sources."

To help determine the applicability of the RICE NESHAP, use this Applicability Flowchart and EPA's Regulation Navigation Tool.

The affected stationary diesel engines must comply with CO emission limits or must be fitted with emission controls, such as diesel oxidation catalysts, to reduce CO emissions as shown in Table 8 and 9. The emission standards are in units of part per million (ppm) by volume, dry basis (ppmvd).

Table 8. Numerical Emission Standards for Existing Stationary CI RI Located at Major Sources

Table 9. Numerical Emission Standards for Existing Stationary CI RI Located at Area Sources

The rule also requires the use of ultra-low sulfur diesel fuel for stationary non-emergency engines greater than 300 hp with a displacement of less than 30 liters per cylinder. The regulation will be fully implemented by 2013.

The regulation includes a number of other provisions, including work practices for engine operators. Stationary engines above 300 hp must also be equipped with closed or open crankcase filtration system in order to reduce metallic HAP emissions. While the regulation does not mandate the emission control technology, the EPA designed the standards based on the capabilities of the diesel oxidation catalyst (DOC).

SI RICE NESHAP.

In August, 2010, the EPA provided a final ruling on National Emission Standards for Hazardous Air Pollutants (NESHAP) for Spark Ignition Reciprocating Internal Combustion Engines (SI RICE). This ruling primarily affects existing stationary gasoline and natural gas engines, but also addresses emissions from SI engines operating on other fuels. Final compliance is October 19, 2013. However, an initial notification of applicability needs to be received by the EPA before February 16, 2011.

The rule is intended to reduce emissions of toxic air pollutants such as formaldehyde, acetaldehyde, acrolein, methanol and other air toxics from several categories of previously unregulated stationary engines.

The rule is applicable to the following types of natural gas engines:

• Current spark ignition engines in use (not new)
  • 4 Stroke Lean Burn (4SLB) engines
  • 4 Stroke Rich Burn (4SRB) engines
  • Landfill or Digester Gas engines
  • 2 Stroke Lean Burn (2SLB) engines

To help determine the applicability of the RICE NESHAP, use this Applicability Flowchart.

The affected stationary spark ignition engines must comply with CO emission limits or must be fitted with emission controls, such as oxidation catalyst or non-selective catalytic reduction (NSCR), to reduce CO and formaldehyde emissions as shown in Table 10 and 11. The emission standards are in units of part per million (ppm) by volume, dry basis (ppmvd).

Table 10. Emission Standards for Existing Stationary SI Rice > 500 Hp Located at Major Sources of HAP

Table 11. Numerical Emission Standards For Existing Non-Emergency 4SLB Stationary SI Rice > 500 Hp Located at Area Sources of HAP And Existing Non-Emergency 4SRB Stationary SI Rice > 500 Hp Located at Area Sources of HAP

The rulings include a number of other provisions; including work practices, operating limitations, start up requirements and how to demonstrate compliance. While the regulation does not mandate the emission control technology, the EPA designed the standards based on the capabilities of oxidation catalysts and non-selective catalytic reduction.

RICE NESHAP Summary Tables.

Due to the complexity of the RICE NESHAP, the following tables have been included to further summarize the emission standards:

• Table 12 - Emission Standards - Existing RICE Located at Major Sources
• Table 13 - Emission Standards - Existing RICE Located at Area Sources
• Table 14 - Emission Standards - New RICE Located at Major Sources by existing and new RICE at both Major and Area Sources.

Table 12. Emission Standards - Existing RICE Located at Major Sources

Work Practice Standards include:

1. Change oil and filter every 500 hours of operation, or annually, whichever comes first.
2. Inspect air cleaner every 1000 hours of operation or annually, whichever comes first.
3. Inspect all hoses and belts every 500 hours of operator or annually, whichever comes first, replace as necessary.

Table 13. Emission Standards - Existing RICE Located at Area Sources

Management Practice Standards ensure that emission control systems are working properly. See the RICE NESHAP rule for details.

Table 14. Emission Standards - New RICE Located at Major Sources

What are the RICE NESHAP compliance requirements?

Table 15 summarizes the compliance requirements for various RICE, including initial emission performance testing, subsequent performance testing, operating limitations, maintenance requirements, notifications and recordkeeping.

Table 15. RICE Compliance Requirements Summary

Emission standards for new RICE located at area sources :

• Meet Stationary Engine NSPS
• CI: part 60 subpart IIII
• SI: part 60 subpart JJJJ

Cost of HAP Emission Controls. As an aid, the following are cost estimates for common pollution control mechanisms:

CI and SI lean burn engines

• Oxidation catalyst
  • Estimated capital cost:
  • CI: $27.4*HP - $939
  • SI 4SLB: $12.8*HP + $3,069
  • Estimated annual cost:
    • CI: $4.99*HP + $480
    • SI 4SLB: $1.81*HP + $3,442

SI 4SRB engines

• Non-selective catalytic reduction (3-way catalyst)
  • Estimated capital cost: $24.9*HP + $13,118
  • Estimated annual cost: $4.77*HP + $5,679

Recordkeeping and Reporting Requirements

RICE NESHAP requires end-users (facility operators) to report to their regional EPA office if their facility falls under the provisions stated in 40 CFR Part 63 Subpart ZZZZ (applies to both CI and SI RICE). This notification should have been submitted in writing by February 16, 2011 for SI engines and or August 31, 2010 for CI engines, or 120 days after you become subject to the relevant standard. Initial notification is the responsibility of the owner/operator of the source.

Additional notifications include:

• actual startup (15 days after actual startup)
• performance test (60 days prior to test)
• initial notification of compliance (60 days after compliance is demonstrated)

Compliance reports are submitted semiannually or annually, depending on the engine.

There is no official form required by the EPA, as long as the proper information is included. Example notification forms have been published by EPA:

• Initial Notification Example for Stationary Spark Ignition Reciprocating Internal Combustion Engines area source rule 40 CFR Part 63 Subpart ZZZZ
• Initial Notification Example for Stationary Reciprocating Internal Combustion Engines area source rule 40 CFR Part 63 Subpart ZZZZ

At the present time, only hard copies of the initial notification will be accepted.

Mailing addresses for the ten EPA regional offices can be found here.

Your state may have received delegated authority for RICE NESHAP notification. Use the Air Pollution State Resource Locator to check with your state environmental agency or local environmental authority to determine if they require notification in addition to notifying the EPA.

Spill Prevention, Control and Counter Measures

EPA promulgated the Spill Prevention, Control and Counter Measures (SPCC) rule to reduce the risk of damaging our waterways from oil spills. These rules are applicable to a very wide range of facilities and operations, including fuel oil storage tanks for boilers. The rule requires specific facilities to prepare, amend, and implement SPCC Plans. The SPCC rule is part of the Oil Pollution Prevention regulation, which also includes the Facility Response Plan (FRP) rule.

An SPCC Plan is required for facilities which due to their location, could reasonably be expected to discharge oil to surface water or adjoining shorelines and have:

• Total aboveground storage capacity of 1,320 gallons or more of oil (however, only containers or oil-containing equipment with a capacity equal to or greater than 55 gallons count toward the threshold); or
• A total oil underground storage capacity of 42,000 gallons or more (however, underground storage tanks subject to regulation under RCRA [40 CFR 280 or 281] are not included); or
• Been required by the EPA to prepare and implement an SPCC Plan.

The SPCC regulations require the facility owner/operator to prepare and implement an SPCC plan for their facility. This plan must be well thought out and prepared in accordance with good engineering practices. It must document the location of storage vessels, types of containment, dangers associated with a major release of material from the tanks, types of emergency equipment available at each site, and procedures for notifying the appropriate regulatory and emergency agencies.

To assist facility owners and operators with SPCC compliance, EPA has published a useful document: Spill Prevention, Control, and Countermeasure (SPCC) Regulation.

More resources on SPCC:

Applicable rules: 40 CFR 112.

Other Resources

Small Business Ombudsman/Small Business Environmental Assistance Program (SBO/SBEAP) List of Contacts. Use this resources to find compliance assistance in your state. This EPA program was established to help small businesses comply with air quality regulations. However, many of these state technical assistance programs have expanded their air quality focus to provide technical assistance in other environmental areas.

Compliance Guide to CI (Diesel) RICE NESHAP. Produced by Universal Emissions Technologies, covers exhaust system considerations, serviceable catalyst systems, maintenance free catalyst systems, and compliance catalyst monitor.

Final Air Toxics Standards for Compression Ignition Reciprocating Internal Combustion Engines. EPA fact sheet.

Final Air Toxics Standards for Spark Ignition Reciprocating Internal Combustion Engines. EPA fact sheet.

Does your engine need to be RICE NESHAP compliant? A step-by-step compliance guide produced by Universal Emissions Technologies.

Visit EPA's Technology Transfer Network for the latest on the RICE regulation, including rule, technical and implementation information.