Showing posts with label TEOM. Show all posts
Showing posts with label TEOM. Show all posts

Tuesday, July 27, 2021

EPA's cordwood test protocol for wood stoves moves forward

 AGH wrote to the EPA in June and again in early July, requesting public information about the stove testing that it is undertaking.  We had seen numerous references about the stove testing but could not find more details about it.  Rather than submitting a Freedom of Information request, which would likely provide a jumble of emails and miscellaneous documents, we urged the EPA to provide an overview.  Details about the EPA’s stove testing program are well known by HPBA insiders, and by staff at NESCAUM and NSERDA, yet we have consistently found that the EPA, nor those organizations, share information very well. This blog may be updated soon with rejoinders from experts who take issue with the EPA's narrative.  

This letter from the EPA partially explains how and why the EPA approved an IDC (ALT-140) test method without a full certification test report using that method.  NYSERDA and NESCAUM still have not produced certification level test data for their IDC method "although we [the EPA] understand that Alaska will be providing us with additional data demonstrating use of the ALT-140 for compliance testing."  

In the past 10 years, the EPA has rarely had any budget for lab testing, so its current budget of one million is significant.  AGH believes that its imperative for the EPA to develop its own data and not just rely either on industry or groups like NESCAUM and NYSERDA.  We reproduce below the email verbatim from Stef Johnson, leader of the EPA's Measurement Technology Group.  The photos were added by us.

July 20, 2021

Dear Mr. Ackerly: 

 

Thank you for the questions you forwarded in your July 9, 2021 email.  I appreciate the thoughtfulness of you questions and the opportunity to engage with you on this important topic.  In particular, I’d like to clarify the steps in EPA’s processes for: 


·         New Test Method Development and

·         Alternate Test Methods (ATM) 

 

New Test Method Development 

 

In the method development process, EPA creates new measurement methods for regulatory purposes.  In the case of EPA developing new test methods for wood heaters, EPA has embarked on a public process that engages stakeholders as we develop a new measurement method for this sector.  EPA’s Measurement Technology Group, the group I lead, began the process by convening a Roundtable consisting of manufacturers, Hearth Patio & Barbeque Association (HPBA) staff, state and local regulators, test lab technical staff, and multijurisdictional organization (MJO) representatives.  The Roundtable participants gathered to discuss the use and vetting of the Integrated Duty Cycle (IDC) method for certification of wood fired stoves and consider making that testing approach an EPA test method.   

 

After the January 2020 meeting where we discussed the IDC approach and the ASTM E3053 test approach, the agency determined that we would pursue development of the IDC as an EPA method.  We have been working in that direction ever since.  The process to conduct method precision testing of an IDC for wood heaters, one for hydronic heaters, one for forced-air furnaces, and one for pellet heaters is resource intensive and complex.   

 

EPA remains committed to transparency and open dialogue as we explore and develop new methods for compliance testing of wood heating appliances.  We have provided the Roundtable group information about our Quality Assurance Project Plan (QAPP), the IDC method for wood heaters -- the current subject of our trials, and the Tapered Element Oscillating Microbalance (TEOM) Standard Operating Procedures.  We have also shared supporting spreadsheets for using these methodologies.  We have posted this and other information in a public docket (EPA-HQ-OAR-2016-0130) and we have begun using this posted IDC, along with TEOM measurements in our contracted laboratory.     

 

The EPA is paying for 26 tests at PFS-
TECO testing in Portland, OR.

We are conducting 52 tests (26 paired tests) at a West Coast lab (PFS-TECO) and will be comparing those data to a duplicate effort that will be funded by NYSERDA and conducted at ClearStak laboratories in Connecticut.  Within each lab, we are doing paired testing to look at intra-laboratory variability -- known as repeatability testing.  We will be comparing the inter-lab variability (method reproducibility) between these bi-coastal sets of 26 test pairs.  This helps us understand the test method performance with respect to overall variability and informs our decisions as to the appropriateness of the test method for use with a given emissions standard.  EPA has committed nearly $1,000,000 to the West Coast portion of wood heater test method work, and to a study of TEOM precision to be done at EPA’s facility in Research Triangle Park, NC.  This type of data has never been collected for any wood burning appliance test method to date.   

 

All data we develop from our trials will be publicly available and placed into the same docket as the QAPP and IDC /TEOM methodologies.  We will convene the Roundtable after the wood heater precision testing is complete and we have data to discuss.  Certainly, there will be lessons learned along the way and improvements made.  As you may know, NYSERDA is also conducting wood heater precision testing, and we expect that they will make their data public.  East Coast testing will likely begin in mid-September.  We anticipate that a full data set will be available for discussion by in early 2022.  Again, this is for the development of a wood heater IDC compliance test method.  Finally, we will propose, take public comment, and finalize a new compliance test method.  All of this will be a public process, and all of the data will be available for review.   

NYSERDA is paying for 26 tests of
the same stoves at ClearStak in
Connecticut.  ClearStak offers
transparency in testing by video taping 
the tests but it is not known if these 
tests will be videotaped or if the tapes
will be released to the public.

 

Alternative Test Methods 

 

The Alternate Test Method (ATM) approval process is different than compliance test method development.   In the ATM process, the requestor is responsible for providing sufficient information to the agency to demonstrate that the proposed Alternate Test Method is appropriate for compliance testing purposes.   Requesting an ATM is an option available to any affected party. The proposed ATM must be deemed by the Measurement Technology Group to be appropriate with the final air pollution standard.  The entity requesting the ATM must demonstrate compliance with a Federal subpart regulated by 40 CFR Part 60, such as subparts AAA or QQQQ regulating wood burning residential heating appliances. 

 

EPA’s Measurement Technology Group receives requests for alternate means of compliance testing from affected source categories, from electric utilities to wood heater manufacturers and everything in between.  We are responsible for reviewing each request and make a technical determination about the appropriateness.  We either work in a direct back/forth manner with the requestor or we agree to the request with some stipulations. (You will note we listed several in our 2021 ALT-140 approval letter).  

 

In sum, the ATM approval process is a technical exchange with a requestor followed by a technical evaluation by my staff.  The goal is to approve compliance testing that meets a specific need and is appropriate for the compliance purpose as outlined in the rule.  While such evaluations may involve exchange of data between the requestor and EPA, each request is evaluated and assessed on a case-by-case basis.  

 

In situations where there is not any test method available, for example, EPA will evaluate the request differently than in situations where we have already approved an ATM.  With regard to ALT-140, we have had the opportunity to learn about the IDC development process through multi-party meetings from 2017 to 2020.  The information shared during this time about the IDC illustrated that this method provides a more rigorous test assessment of heater performance and therefore, provides a more conservative compliance demonstration approach.  Such conservative approaches (more difficult to pass the test) are nearly ideal for Alternate Test Method processes because one of our goals with the ATM process is to not relax the standard in any manner.   

 

That said, when EPA received Alaska’s request to approve an alternative test method for demonstrating compliance with the New Source Performance Standard Subpart AAA, Standards for New Residential Wood Heaters in December 2020, we were not aware of data that demonstrated that a wood heater could meet the emissions limit of the rule using the IDC.  Therefore, we asked Alaska to provide us with that information.  While what they provided to EPA is not an entire test report, it is credible enough for us to allow the use of the test method for compliance demonstration, where a compliance test must fully document all of the test method QA/QC details to satisfy EPA’s Office of Enforcement and Compliance Assurance (OECA)’s requirements.   

 

Finally, using an ATM itself is optional and my staff ensures that all alternative methods are equivalent or more stringent than the test method in the EPA regulation.  No one need ask to use one unless they decide that it is in their interest to do so.   In the case of the Alaska request, EPA’s approval of ALT-140 provides a cord wood compliance pathway for manufacturers wishing to sell in the Fairbanks-North Star area.  They are also free to conduct crib fuel tests and sell crib fuel tested units in that area.   

 

Finally, EPA has received 5 spreadsheets from NYSERDA/NESCAUM in support the Alaska ALT-140 request and they are available upon request.  To date, EPA has not received any other NYSERDA/NESCAUM test data used for their IDC method development purposes, although we understand that Alaska will be providing us with additional data demonstrating use of the ALT-140 for compliance testing.  

 

I hope this has been helpful for your understanding.   

 

Very sincerely, 

 

Steffan Johnson

Leader - Measurement Technology Group

US Environmental Protection Agency (EPA)



Related stories

Nine states urge the EPA to revoke the ASTM cordwood method (May 2021)

EPA announces overhaul of wood stove certification process (April 2021)

AGH response to NESCAUM report on wood stoves (March 2021)

EPA and states vigorously defend audits of wood stoves (Sept. 2020)

EPA finds lapses in cordwood certification testing (July 2019)



Tuesday, March 5, 2019

Wood stove industry faces unified opposition to deregulation

A 2018 portrait of the Western
Governors Association who
oppose delays in the NSPS timeline.

Amid the scores of comments filed in response to the EPA’s proposal to weaken Obama-era wood stove and boiler regulations, not a single state came out in support of the Trump Administration’s proposals.  

Attorney Generals from eleven states (CT, IL, MA, MD, MN, NJ, OR, NY, RI, VT & WA) filed detailed comments and are likely prepared to sue if the EPA tries to weaken the existing regulations.  Even Alaska and the Western Governors Association is backing the Obama-era timeline. A more troubling sign for the wood stove and boiler industry is an energized, engaged and knowledgeable array of states, air agencies and non-profit organizations that have lined up to oppose virtually all the changes that the stove and boiler industry is seeking from the Administration.

“We are seeing a polarization of stakeholders who once used to make alliances and find common ground,” said John Ackerly, President of the Alliance for Green Heat, an independent non-profit that promotes cleaner and more efficient wood and pellet heating. “The Trump Administration efforts has energized states and unified them across a range of issues, from compliance deadlines, to test methods, to regulation of wood pellet composition, to warranties and audits for stoves,” Ackerly said.

Key excerpts of stakeholder comments which this analysis is based on can be found here for those who don't want to download and read through hundreds of pages of comments.
John Ackerly, head of the Alliance
for Green Heat.  Photo courtesy of
Popular Mechanics magazine.

Trump Administration proposes a delay

The biggest issue on the table is whether the EPA will extend a deadline and allow retailers to sell dirtier wood boilers and furnaces – and possibly wood stoves – until 2022 instead of 2020. The EPA has indicated an interest to provide this relief to wood boiler and furnace manufacturers and retailers, but time is running is out and the agency has been moving slowly on this issue.  It’s also unclear if states would be able to get an injunction to prevent such a move while it was being litigated.  

Scores of comments submitted to the EPA depict an industry that has few friends standing up for it outside its own network of manufacturers and retailers.  Attorney generals from three states with Republican governors – Maryland, Massachusetts and Vermont – sided with democratic-led states in opposing any delay in stricter emission standards taking effect.  

Among industry, there is widespread unity to allow retailers two more years to sell Step 1 boilers, furnaces - and stoves - that are set to go off the market in May 2020, although a handful of small manufacturers and importers support the existing timeline.  

While manufacturers argue forcefully that they need a two-year sell-through, they are also having to assure their retailers that they will have 2020 compliant products.  For example, in comments submitted to the EPA, Jotul says it faces dire economic consequences with $2.5 million in raw cast iron at stake if a 2-year sell-through is not granted.  But in an industry magazine read by retailers, Jotul says they are doing “very well” certifying their 2020 models and expect to release their new 2020 models later this year.  Based on the EPA’s list of certified wood stoves, it appears that Jotul is one of the manufacturers who is far behind schedule, as they do not yet have a single 2020 compliant stove on the list.  Industry sources have said that the list of EPA certified stoves far underestimates the preparedness of many manufacturers who may be waiting to submit test data for 2020 compliant stoves until they are closer to the required date.
Richard Corey, CEO of
California's Air Resources
Board

While northeast and northwest states have been the principal state actors, California is making a big investment in challenging the EPA's deregulatory proposals.  They filed extensive comments to both the Proposed Rule Making (PRM) and the Advance Notice of Proposed Rule Making (ANPRM).  They and many of other states challenge the legality of the EPA's approach, setting the scene for what is likely to be a legal battle.  They argue:

"The [EPA's] requests for information with respect to the emission limit for wood heaters do not request the right information, are biased and outcome seeking towards collecting evidence for weakened standards and miss the opportunity to collect the data necessary to perform an accurate and complete economic and regulatory impact analysis.  Asking “whether Step 2 is achievable at a reasonable cost” is not the correct framing of the question. The answer to this question seems predetermined, particularly for those who ostensibly have “been unable to design a wood heater to meet the Step 2 standard.”
Letita James, the Attorney
General of New York, is the
lead among eleven attorney
generals opposing a sell-
through and other changes.

Perhaps the most detailed argument for a two-year sell-through came from North East Distributors, one of the largest distributors of stoves made by many manufacturers.  They say that they “are in favor of manufacturers having to meet the May 15, 2020 deadline for stopping production of non-2020 compliant models" but against "holding distributors and retailers to the same May 15, 2020 deadline for sales of already manufactured products. Having the one date for all entities (manufacturers, distributors, and retailers) inhibits the results you are trying to accomplish.” 

A push to deregulate outdoor wood boilers

The main regulatory focus has been on a sell-through for outdoor wood boilers, also known as hydronic heaters, and inexpensive indoor wood furnaces.  Leaders of those companies have been testifying to Congress and lobbying the administration. 

For central heaters like boilers and furnaces, the main industry association, the Hearth, Patio and Barbecue Association (HPBA) is calling on the EPA to “repeal those standards altogether.”  Strengthening emission standards for wood boilers and furnaces was one of the largest goals of the 2015 New Source Performance Standards (NSPS), and this call to deregulate that industry altogether represents a new front in the widening gulf between industry, states and air quality agencies.  

HPBA's John Crouch, an
architect and mediator of
HPBA policies.
US Stove, the dominant manufacturer of indoor wood furnaces is also calling on the EPA to repeal emission standards for furnaces because the “economic feasibility of meeting the standards is impractical” and the emission levels are “preposterous and unrealistic.”  However, a far smaller competitor, Lamppa Manufacturing already has a furnace that meets the 2020 standards.

When it comes to outdoor wood boilers, fringe voices are not uncommon. There is a group of retailers and consumers supporting the “Hawken Proposal”, which calls for getting rid of federal emission standards for outdoor boilers altogether and letting states and municipalities voluntarily adopt standards.  The proposal is being led by Hawken Energy, a Missouri based company that believes the federal government should not interfere with how people heat their homes. 

In contrast, Central Boiler took a more moderate position and refrained from calling on the EPA to repeal Step 1 and/or Step 2 standards, instead asking the agency to “revisit the cost effectiveness and feasibility of the Step 2 emission limit.”

Lack of enforcement undermines certified boilers
 
Warren Walborn, CEO of Hawken
Energy with Rep. Bill Huizenga (R-MI).
An important concern among the outdoor wood boiler community is that the EPA has no enforcement capability to rein in the many manufacturers of unregulated outdoor boilers.  Yoder Outdoor Furnace, a HeatMaster retailer in Virginia said, “until [EPA] enforcement actually happens no manufacturer can afford to invest heavily in testing as these cheap illegal models will not allow them to recoup costs.”  That sentiment was echoed in many comments from industry, and it would seem to be an issue of concern to states and air quality agencies as well.  However, states and air quality agencies did not mention this problem in their comments.  

By opening the door to changes in the compliance timeline for stricter emission standards, the EPA may have built far more momentum for a new NSPS process in 2023.  The NSPS is supposed to be reviewed every eight years, and states and groups are likely to sue again to keep the EPA to that timeline.  Virtually all the states and air quality agencies engaged in fighting EPA’s proposed changes are now calling for far-reaching changes in the 2023 NSPS. If a democrat is in the White House in 2023, this momentum may result in even stricter emission limits and test method changes.  A group of eleven Attorney Generals said the 2020 emission standards are already “too lax.” If President Trump is re-elected, industry is likely to keep the upper hand and consolidate its goals, barring defeats in court.
Lisa Rector, a leader at
NESCAUM on wood
smoke reduction.


In addition to seeking input on granting a two-year sell-through for retailers for boilers and furnaces, and possible stoves, the EPA identified a half a dozen other issues for which it wanted feedback, from cordwood test methods to compliance testing.

The transition to cord wood testing

One area on which industry, states, air quality agencies and other groups all agree is the need to move toward testing and certification that more closely represents in-field operating conditions and performance.  This means testing and certifying stoves with cordwood, instead of crib wood (2x4s and 4x4s), capturing start-up emissions and potentially making even more structural changes to how stoves are tested.  The agreement may end there, however, as states and air quality agencies have now coalesced behind a test protocol being developed by Northeast States for Coordinated Airshed Management (NESCAUM) and the New York State Energy and Research Development Authority (NYSERDA), called the Integrated Duty Cycle (IDC) method.  Industry is firmly behind the ASTM E3053 method that they developed through a consensus-based process from 2015 to 2018. 

VP Berger, one of Hearth &
Home Technologies senior
leaders on NSPS issues.
Neither side is proposing a rapid change to mandatory cord wood testing.  States and air quality agencies are looking to the next NSPS in 2023 to consolidate their positions and interests.  The State of Oregon, home to most of the test labs and the very first certification testing in the mid 1980s, submitted comments that were particularly critical of ASTM methods.  

Hearth & Home Technologies (HHT), whose comments were often more moderate than some of their peers, said, “HHT recommends using ASTM E3053 until such time there is data showing that the ASTM method doesn’t replicate real-world cord wood emissions or that a new Federal Reference Method is needed.” 

States want labs to start using TEOMs immediately

While states and air quality agencies say that they do not want to change the existing NSPS and believe that any changes to testing and emission standards should be taken up in the 2023 NSPS.  However, they are calling on EPA to “adopt a requirement now, to take immediate effect, for the concurrent use of a tapered element oscillating microbalance (TEOM) test method to measure real-time particulate matter (PM), using the NESCAUM Standard Operating Procedures.”  Such a requirement would seem to involve a change to the current NSPS, unless it were a voluntary measure that labs could undertake as part of a research effort outside of it.

Third-party certification of stoves 

Once stoves or boilers are tested by third party labs, those labs currently send the test reports to the EPA for review and then the EPA issues the certification allowing the manufacturer to make and sell the appliance.  

Industry urged the EPA to ask for comments about a change in this process, whereby the lab would test the appliance and grant the certification, bypassing review by the EPA. Industry points to delays and backlogs at the EPA enforcement office, which takes up to 90 days to grant certificates once the lab provides the necessary documentation.  
 EPA officials, including Amanda
Aldridge and Rochelle Boyd, listen
to testimony on Dec. 17, 2018
on proposals to revise the NSPS.

Again, states and air quality agencies have lined up to oppose this proposal, arguing that the same lab that is paid by the manufacturer to test the stove should not be paid by the manufacturer to issue the certification.  With cutbacks to EPA funding, it does not appear likely that the EPA would hire additional people to help streamline the certification process and at the same time provide other oversight and enforcement of the NSPS, such as cracking down on manufacturers of uncertified outdoor wood boilers. 

Compliance audit testing

Another topic on which the EPA solicited comments is how and when stoves could be retested and audited for emissions compliance.  Auditing the accuracy of the lab that did certification testing of a pellet stove is far easier, as the variability of emissions in pellet stoves is not nearly as great as in wood stoves.  Industry, led by HPBA and Central Boiler, took the position that an audit test should only happen “where there is suspected fraud in certification test results” not random spot checks.  HPBA took an even stronger position, saying that EPA should “prohibit audit testing for appliance categories until there has been a determination on variability for the applicable test.”
Blaze King's Chris Neufeld, an
ardent promoter of catalytic stoves.

Others in industry, such as Hearth & Home Technologies, took the position that if a stove is to be audited, it should be done by the same lab that tested it initially or another lab chosen by the manufacturer.  

States and air quality agencies are taking a uniform position that “only an independent, third-party lab should be selected to conduct all compliance audit testing so that there is consistency across the program and that a lab that conducts certification testing is not permitted to conduct audit testing.” NESCAUM proposed that Brookhaven National Lab be designed as the independent lab.

Warranty requirements

Currently, the NSPS has warranty requirements for catalytic stoves, but not for non-catalytic stoves.  The industry position is that the NSPS should not have any warranty requirements. Hearth & Home Technologies commented that “all manufacturers already have warranty language... [and] whether the EPA required it or not, it is standard warranty language for an appliance.”

This topic drew less attention from states and air agencies, but most supported the retention of warranty language for cat stoves and the addition of warranty requirements for non-cats, “particularly ones for key components related to controlling emissions from the device (including, among others, tubes).”  Blaze King, a vocal leader on this issue, agreed that if any type of stove is required to provide warranty language, then all stoves should have that requirement.   
Steve Muzzy, head of Central Boiler.


Different emission standards for pellet and cordwood appliances

Some industry players see a solution to emission standards by holding pellet appliances, and possibly also catalytic appliances, to a stricter standard.  Central Boiler charged that the EPA was “negligent” to hold stick wood and pellet appliances to the same emission standard.

HPBA and industry leader Hearth & Home Technologies are not calling for a bifurcation of emission standards based on fuel type or whether a stove has a catalyst.  The first NSPS in 1990 originally set a 7.5 gram an hour standard for non-cat stoves and a 4.1 standard for catalytic stoves.  States and air agencies also do not support setting separate emission levels based on fuel or inclusion of a catalyst.  Tim Ballo, an Earth Justice attorney, commented, “EPA’s observation that more pellet stoves meet the Step 2 standards than crib or cord wood stoves does not support the adoption of weaker emission standards for crib or cord wood-fired heating devices.”
Bret Watson says Jotul is
doing "very well" in
certifying their 2020 models.

In an exasperated and testy comment, Blaze King accused Jotul of working with the State of Maine to “spread false, misleading and out of date information in an effort to secure market share.”  Jotul has been a strong advocate for non-catalytic stoves and was instrumental in distributing a form letter to retailers to submit to the EPA that severely criticized catalytic technologies.  An unspoken rule in the stove industry is never to criticize another manufacturer by name, but the Blaze King feud with Jotul has only become more intense as the NSPS revision process increased the stakes of the game.  It should be noted that in Jotul’s official comments to the EPA, they did not call for a bifurcation of emission standards. 

A renewable, low carbon energy source

The role of wood and pellets as a renewable, low carbon fuel is virtually lost by the EPA, industry, states and air agencies.  Technically, the renewability of wood plays no legal role in setting emission regulations or other EPA policies governing wood and pellet heating.  However, many industry comments referred to the important role that wood heating plays in the lives of rural, lower income households, allowing them an affordable alternative to fossil fuel heating.  While it didn't appear in their comments, many of the states urging the EPA to maintain cleaner emission standards are also providing incentives for more deployment of wood and pellet heaters.  New York, Vermont, Massachusetts, Maryland and others all have programs aimed at strengthening modern wood heating.  The Alliance for Green Heat was founded to promote the role of biomass as a low carbon fuel source and has tried to gain industry support for innovation leading to the automation of wood stoves.  But for now, the sides have been drawn on this issue based mostly on affordability vs. cleanliness, not on carbon.

What comes next?

The EPA has said that it may make a decision on whether to grant wood boilers and furnaces a two-year sell through in the spring of 2019.  As for all the other issues, including a two-year sell-through for stoves, they have only issued an advance notice and still have to decide if they will issue a formal proposal.  That proposal would also be followed by a public comment period and it is difficult to imagine a scenario that the EPA could announce any “relief” for manufacturers before winter of 2019/2020.
Bill Wehrum, in charge of weakening
air pollution rules at the EPA for the
Trump Administration, has little time
to deliver on wood heaters.

Industry came close to securing a more robust compliance extension from Congress in 2018 but fell short in the Senate.  With Democrats now in charge of the House, Congressional support for weaker or delayed emission standards is not an option in 2019 or 2020.

Clearly, the attempt to dilute the NSPS by the Trump Administration has coalesced and unified states and air agencies behind positions developed by NESCAUM and others.  They are looking to 2023 to regain the ascendancy that they lost under Administrator Pruitt and Wheeler’s leadership at the EPA.  If democrats take the White House in 2022, rewriting the NSPS starting in 2023 could be a possibility.  But a democratic White House and EPA would, in turn, energize Republican governors who seem to have been complacent during this comment process.  Under Republican Governor LePage, Maine was the one state that was emerging as a vocal supporter of the EPA’s deregulation of wood appliances, but during the comment process, a Democratic Governor was elected.  

At this point, time is critical as May 2020 approaches. It appears that the issue was not important enough for the EPA to put on a faster track and members of Congress supporting the hearth industry were not able to change that.  With a little more than a year to go, the question is – is it too late anyway?