This week's All Things Chemical™ Podcast will be of interest to readers of the Pesticide Law & Policy Blog®. A brief description of the episode written by Lynn L. Bergeson is below.
This week I sat down with James Aidala, B&C’s Senior Government Affairs Consultant, to catch up on what the U.S. Environmental Protection Agency’s (EPA) Office of Pesticide Programs (OPP) is up to and to get a sense of what we might expect to develop over the remainder of the year. As a former Assistant Administrator of what is now the Office of Chemical Safety and Pollution Prevention, Jim’s thoughts and analyses are always spot on.
We discuss leadership within OPP, which is transitioning. Not surprisingly, who holds the position of Office Director is always of great interest to the agricultural and biocidal chemical communities.
We also touch upon a number of high-profile pesticide science policy debates about substances, some of which have been raging literally for years. These substances include dicamba, glyphosate, and chlorpyrifos. The legal and scientific administrative and judicial reviews under way in the United States and internationally are fascinating, precedent setting, and closely watched.
Our conversation also includes a bit about the commercial agricultural chemical community. Industry consolidation and international trade issues continue to challenge the commercial landscape, and they make keeping up with these issues all the more important.
ALL MATERIALS IN THIS PODCAST ARE PROVIDED SOLELY FOR INFORMATIONAL AND ENTERTAINMENT PURPOSES. THE MATERIALS ARE NOT INTENDED TO CONSTITUTE LEGAL ADVICE OR THE PROVISION OF LEGAL SERVICES. ALL LEGAL QUESTIONS SHOULD BE ANSWERED DIRECTLY BY A LICENSED ATTORNEY PRACTICING IN THE APPLICABLE AREA OF LAW.
By Lisa M. Campbell, Lisa R. Burchi and Barbara A. Christianson
On July 6, 2020, the U.S. Environmental Protection Agency (EPA) announced that it approved amended labels for two products, Lysol Disinfectant Spray (EPA Reg. No. 777-99) and Lysol Disinfectant Max Cover Mist (EPA Reg. No. 777-127), based on laboratory testing that shows the products are effective against SARS-CoV-2. These are the first products for which EPA has reviewed laboratory testing data and approved label claims against SARS-CoV-2.
In January 2020, at the beginning of the SARS-CoV-2 public health emergency, EPA activated its Emerging Viral Pathogens guidance (Guidance), This Guidance was developed in April 2016 to set forth procedures for EPA to respond to the potential need for products to combat emerging viral pathogens that are not on EPA-registered disinfectant labels. The Guidance allows product registrants to make limited claims of their product’s efficacy against SARS-CoV-2, provided in part that there are efficacy data that have already been reviewed by EPA and demonstrate their products are effective against harder-to-kill viruses than SARS-CoV-2.
Since activating its Guidance for the first time, EPA has reviewed amendments for already EPA-registered surface disinfectants on an expedited basis and developed a list -- List N -- of products that meet its criteria under the Guidance for use against SARS-CoV-2. List N currently includes 431 products and is updated weekly. In many cases, EPA states that it was able to approve claims in as little as 14 days.
This week, EPA updated the entries for the two Lysol products on List N to indicate they have now been tested directly against SARS-CoV-2. This is significant since they are the first List N products for which EPA has reviewed laboratory testing data specifically against SARS-CoV-2, and not listed based on EPA’s determination that a product can be used against SARS-CoV-2 because of the product’s effectiveness against a harder-to-kill virus.
EPA states that it expects to approve such claims for additional List N products in the coming weeks.
By Lisa M. Campbell, Timothy D. Backstrom, and Carla N. Hutton
The U.S. Environmental Protection Agency (EPA) announced on July 2, 2020, that it has registered NSPW Nanosilver (a new nanosilver formulation) to suppress odor-causing bacteria and algae, fungus, mold, and mildew that can cause deterioration or staining in textiles. Textiles that may be treated with NSPW Nanosilver include fabrics, sportswear, footwear, linens, and awnings. NSPW Nanosilver is the active ingredient in the pesticide product POLYGUARD-NSPW MASTER BATCH (Polyguard). The NSPW Nanosilver in Polyguard will be embedded within beads or pellets of a polymeric material in a “master batch,” and these beads of pellets will then be incorporated into treated textiles through a closed-loop manufacturing process. EPA states that once the beads or pellets containing NSPW Nanosilver are introduced into this manufacturing process, no beads or pellets can escape into the environment. EPA also states that the available data indicate that the leach rate of nanosilver from NSPW Nanosilver-treated textiles is below the limit of detection.
The same type of nanosilver was the active ingredient in another product that EPA previously conditionally registered under FIFRA Section 3(c)(7)(C) in 2015. The U.S. Court of Appeals for the Ninth Circuit issued a decision vacating that conditional registration because the court concluded that the mandatory public interest finding by EPA was not adequately supported by the administrative record. According to EPA, the new registration for NSPW Nanosilver involves a modified use pattern that will limit exposures compared to the product that received the previously vacated conditional registration. Based on additional data that the applicant has submitted to support the use pattern as modified, EPA has prepared an updated risk assessment for NSPW Nanosilver and has determined based on that risk assessment that the product as modified meets the standard for an unconditional registration under FIFRA Section 3(c)(5). Materials supporting this action will be posted in Docket ID EPA-HQ-OPP-2020-0043.
Registering any new metallic silver product that satisfies the EPA criteria for classification as nanosilver for use as an antimicrobial pesticide presents special challenges, because EPA has adopted a policy that it will construe each new nanosilver product as a new pesticidal active ingredient. The predecessor to NSPW Nanosilver (Nanosilva) was granted a conditional registration, a procedure that EPA uses when there are data gaps that must be filled before EPA is ready to make the determinations that would support issuance of an unconditional registration. EPA may only issue a conditional registration for a product containing a new pesticidal active ingredient when EPA makes a determination that “use of the pesticide is in the public interest,” and the Ninth Circuit Court determined that EPA did not compile an administrative record adequate to support that finding.
Colloidal metallic silver products that meet the definition of nanosilver were first synthesized in the late 19th century. Some industry stakeholders question whether the differences between different pesticide products that satisfy the EPA definition of nanosilver are sufficiently great to treat each new product as a new active ingredient, but it is also clear that the size and shape of the particles in these products do vary. In this instance, EPA has determined that the supporting data for the application allow EPA to issue an unconditional registration. Accordingly, the legal issue on which the Ninth Circuit based its prior decision to vacate the conditional registration for Nanosilva is not pertinent to the current registration decision. Given the challenge to the prior registration decision, it will be important to monitor any opposition to the newly issued registration.
By Lisa M. Campbell, Timothy D. Backstrom, and James V. Aidala
On June 3, 2020, the U.S. Court of Appeals for the Ninth Circuit (Ninth Circuit) issued an opinion in National Family Farm Coalition v. EPA, No. 19-70115, vacating the U.S. Environmental Protection Agency’s (EPA) 2018 decisions to extend the conditional registrations for three reduced volatility dicamba herbicides, Bayer’s XtendiMax, Corteva’s FeXapan, and BASF’s Engenia.
The manufacturers of these dicamba products designed them to facilitate control of glyphosate resistant weeds in strains of soybeans and cotton that have been genetically modified to be dicamba tolerant (DT). Although the manufacturers intended these dicamba products to be less volatile and less susceptible to drift into adjacent non-target areas than previous formulations of dicamba, there were nonetheless many complaints that the products cause damage to non-tolerant crops and other vulnerable vegetation. The Petitioners that challenged EPA’s decision to extend the conditional registrations for these reformulated dicamba products include a group representing small farmers who claim that the new dicamba products have damaged their crops (National Family Farm Coalition) and several non-governmental organizations that routinely oppose new pesticide registrations (the Center for Food Safety, the Center for Biological Diversity, and Pesticide Action Network North America).
Although the case included some allegations by the Petitioners that EPA did not comply with the requirements of the Endangered Species Act, the court did not reach those issues. The court found unanimously that EPA’s decision to extend the conditional registrations for the three dicamba herbicides did not satisfy the requirements of the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA). Specifically, the court found that the administrative record compiled by EPA did not include “substantial evidence” supporting EPA’s determination that registering the new uses “would not significantly increase the risk of any unreasonable adverse effects on the environment.” EPA is required under FIFRA Section 3(c)(7)(B) to make this determination to grant a conditional registration of new uses of a currently registered pesticide. The court concluded that EPA could not make this required determination because, the court stated, the record shows that EPA “substantially understated the risks that it acknowledged” and also “entirely failed to acknowledge other risks.”
According to the court, EPA made six material errors in its analysis supporting the registrations. First, the court stated that EPA understated the amount of acreage planted with DT crops in 2018, and consequently also underestimated the amount of the new dicamba products that would be applied that year, even though the decision to extend the conditional registrations for the new dicamba products was not issued until the end of the 2018 growing season. Second, in the court’s view, EPA improperly found that the number of complaints concerning damage to non-target crops and vegetation by the new dicamba products might be over-reported when the record included overwhelming evidence that non-target damage was being under-reported. Third, the court stated that EPA refused even to estimate how much damage to non-target vegetation would be caused by the new dicamba products when the record contained sufficient information for EPA to make such an estimate. Fourth, according to the court, EPA refused to acknowledge the substantial risk of non-compliance with the large number of detailed restrictions set forth in the 40-page approved label, although the court found that “there was substantial evidence that even conscientious applicators had not been able to consistently adhere to the label requirements.” Fifth, the court believes EPA failed to acknowledge the anti-competitive effect of the new technology, which encourages other growers to use DT crops even if they do not use the new dicamba products, to avoid damage from nearby applications. Sixth, according to the court, EPA failed to acknowledge the social cost being caused in small communities where damage caused by use of the new dicamba products has turned formerly amicable neighbors against each other.
Based on all of these purported deficiencies, the court held that EPA’s rationale for determining that the risk of unreasonable adverse effects would not be significantly increased by the new dicamba uses, and that the registration for the new dicamba products could therefore be extended for two additional years, was not supported by “substantial evidence” in the administrative record taken as a whole. The court also held that remanding the matter to EPA for further action without vacatur would not be appropriate because EPA did not satisfy the requirement to extend the conditional registrations. Instead, the court simply vacated the registrations and invited EPA to try again. The court acknowledged that such a decision would cause disruption, especially for those growers that have already purchased DT seeds and dicamba herbicides for this year's growing season, but concluded that no remedy other than vacatur would be appropriate given the deficiencies in the administrative record.
When FIFRA was amended to allow new pesticide products to be “conditionally” registered even though the applicants had not submitted data to satisfy all applicable requirements, the focus was primarily on allowing registration of new products that are “substantially similar” to already registered products. FIFRA Section 3(c)(7) also allows conditional registrations to be issued for new uses of existing active ingredients and for new active ingredients without all required data if EPA has sufficient information to make certain findings while it waits for additional data, but requires that EPA be able to determine that certain requirements can be met even though not all of the supporting data that will ultimately be needed are yet available.
This court’s decision illustrates the type of problems that can occur when EPA issues a conditional registration for new products that are not “substantially similar” to registered products. The court’s view of the sufficiency of the record in this case sets a high bar for the determinations that must support other types of conditional registrations. This problem was previously illustrated when a reviewing court vacated a new registration for a new nanosilver product even though there were already registered nanosilver products. In that case, because EPA chose as a matter of policy to characterize the product as a new active ingredient, it was required to make a “public interest” determination under FIFRA Section 3(c)(7)(C). When the administrative record was deemed insufficient to support this mandatory determination, the reviewing court vacated the registration.
In the case of the new dicamba products, to grant conditional registrations for new uses of an existing active ingredient, EPA was required to determine that the new uses on DT soybeans and cotton would not “significantly increase the risk of unreasonable adverse effects on the environment” under FIFRA Section 3(c)(7)(B). The court found the record supporting this mandatory determination to be insufficient, resulting in the court’s vacatur of EPA’s decision. These two reviewing courts have taken a relatively deep dive into the administrative record supporting a conditional registration for a new use of an existing active ingredient or a new active ingredient in evaluating whether substantial evidence in the record supports the determinations required by FIFRA. Whether future decisions will maintain such a stringent evidentiary standard will be important to monitor.
By Timothy D. Backstrom, James V. Aidala, and Kelly N. Garson
On April 23, 2020, the Supreme Court ruled that pollution traveling indirectly to rivers and streams through groundwater can be covered by the Clean Water Act’s (CWA) permitting requirements. The case, County of Maui, Hawaii v. Hawaii Wildlife Fund, et al, 590 U.S. (2020), concerned whether pollutants discharged from a point source into groundwater, a non-point source, and then conveyed into navigable waters fall within permitting requirements of the CWA. In a 6-3 Opinion delivered by Justice Breyer, the Court held that the CWA “requires a permit when there is a direct discharge from a point source into navigable waters or when there is the functional equivalent of a direct discharge.” Slip op. at 15.
Under the CWA, a point source is a discernable conveyance such as a pipeline and other conduit, including wells (the Court notes that wells ordinarily result in discharge of pollutants through groundwater). Slip op. at 13. The case at issue concerned the County of Maui’s (Maui) operation of a wastewater reclamation facility that collected and partially treated sewage before pumping the treated water into four underground injection wells. From the wells, the treated water traveled half a mile through groundwater into the Pacific Ocean, a navigable water. Maui had not obtained a permit for the discharge, and in 2012, several environmental groups brought a citizens’ CWA lawsuit against the county.
The legal question of whether the CWA’s permitting program covers pollution that travels from a point source, like a factory discharge pipe or a containment pond, through groundwater before reaching a downstream water has major implications for industries ranging from agriculture to oil and gas. The Court’s “functional equivalent” standard for the reach of federal regulation is an interpretation that is narrower than the one sought by environmentalists and endorsed by the Ninth U.S. Circuit Court of Appeals, but the Court declined to defer to the U.S. Environmental Protection Agency’s (EPA) 2019 Interpretative Statement. 84 Fed. Reg. 16810, 16824 (April 2019).
EPA’s Interpretive Statement supported the argument of Maui and the U.S. Solicitor General that if any non-point source lies between the point source and the navigable water, a permit is not required for the release. Groundwater and non-point pollution that is generated, for instance, by rainwater runoff is not covered by the CWA and is regulated by the states. The Court rejected this interpretation, posing the question: “If that is the correct interpretation of the statute, then why could not the pipe’s owner, seeking to avoid the permit requirement, simply move the pipe back, perhaps only a few yards, so that the pollution must travel through at least some groundwater before reaching the sea?” Slip op. at 10. The Court held that “to follow EPA’s reading would open a loophole allowing easy evasion of the statutory provision’s basic purposes. Such an interpretation is neither persuasive nor reasonable.” Slip op. at 12.
The Court did not adopt the “fairly traceable” standard supported by the environmental groups and the Ninth Circuit either, as its scope would be too broad, and would interfere too seriously with states’ traditional and intended regulatory authority over groundwater and non-source pollution. Slip op. at 7-8.
The “functional equivalent of a direct discharge” standard will require a permit for discharge from any point source directly into navigable waters, and from point sources when the discharge “reaches the same result through roughly similar means.” The Court identified seven factors that may be relevant in determining whether the discharge comes “from” a point source:
(1) transit time, (2) distance traveled, (3) the nature of the material through which the pollutant travels, (4) the extent to which the pollutant is diluted or chemically changed as it travels, (5) the amount of pollutant entering the navigable waters relative to the amount of the pollutant that leaves the point source, (6) the manner by or area in which the pollutant enters the navigable waters, (7) the degree to which the pollution (at that point) has maintained its specific identity. Slip op. at 16.
The Court notes that time and distance will be important factors in many (though potentially not all) cases. For example, a distance of a few feet is concretely within the scope of the permitting requirement; a distance of 50 miles that may take a year for the water and perhaps mixing with other materials before reaching the navigable water is indeterminate.
The Court stated that the “functional equivalent” standard will essentially maintain EPA’s longstanding interpretation of the 1972 water law’s requirements prior to the 2019 Interpretive Statement that sought to narrow its reach. The Court further acknowledges that the new standard may expand the scope of the CWA as it applies to wells and septic systems, but does not expect an “unmanageable expansion” of the permitting program, and expects that EPA and the states will mitigate harms and initiate a best practices permitting policy, and that judges will exercise discretion mindful of the complexities of indirect discharges. Slip op. at 18.
The decision of the Supreme Court to construe National Pollutant Discharge Elimination System permitting requirements to extend to indirect discharges that originate at a point source but travel through groundwater before reaching navigable waters was not particularly surprising. Reviewing courts have generally been mindful that completely excluding all discharges to groundwater from permitting might encourage dischargers to use discharges to groundwater to evade otherwise applicable control requirements. Nonetheless, it was somewhat surprising when the Court created a new “functional equivalence” standard that was not specifically advocated by the litigants.
Although the Court clearly intended to adopt a construction that was less expansive than the “fairly traceable” standard adopted by the Ninth Circuit, EPA and the states will have to determine how the seven potentially relevant factors identified by the Court will be utilized in determining when a permit will be required for indirect discharges. EPA and the states will also have discretion to determine whether there are other “potentially relevant factors applicable to factually different cases” as anticipated by the Court. Slip op. at 16. This case involved deliberate discharges of municipal wastewater to underground injection wells, but future policy disputes and litigation are likely to focus on indirect discharges that are more inadvertent in character. Activities of particular interest include indirect discharges from agriculture, and indirect discharges from impoundments that have been used to collect coal ash, mining tailings, and other types of industrial waste.
In the absence of Congressional intervention to codify clearly what is required, the courts can only do so much. The Supreme Court has concluded that Congress could not have intended to create a loophole in the water permitting scheme so large as to encourage deliberate evasion, but it falls now to EPA and the states to determine what sort of indirect discharges are “functionally equivalent” to a direct discharge. Although the Court has afforded considerable latitude to permitting agencies in deciding how to effectuate the new standard, the decision will most likely lead to a new round of contentious litigation before a policy for permitting of indirect discharges can ultimately be adopted.
Bergeson & Campbell, P.C. (B&C®) is pleased to release a timely episode of the All Things Chemical™ podcast, “Chemical Distribution in the Time of COVID-19 — A Conversation with Eric R. Byer, NACD.” In this episode, Lynn L. Bergeson, Managing Partner, B&C, and Eric Byer, President and CEO of the National Association of Chemical Distributors (NACD), sat down to discuss current challenges facing small and large chemical distributors, and how NACD member companies are able to continue to distribute much needed chemical products, including sanitizers and other cleaning products, in response to the pandemic.
Lynn and Eric’s conversation focuses on unique “in the moment” issues and a broad range of federal, state, and international issues on which NACD is focused, including extending the Chemical Facility Anti-Terrorism Standards (CFATS) program, Toxic Substances Control Act (TSCA) implementation initiatives, and the impact of tariffs on imports from China on NACD member companies. Eric is an amazing leader of an essential trade association, and this conversation provides insights into his success as President and CEO of NACD.
The full podcast episode is available to stream online, where listeners can also find the recent podcast “COVID-19, FIFRA, and EPA — A Conversation with Lisa Campbell” Additional updates on chemical regulatory activity related to COVID-19 can be found on B&C’s Pesticide Law and Policy Blog® and on the Regulatory Developments page of B&C's website, including these recent updates:
All Things Chemical™ engages listeners in intelligent, insightful conversation about everything related to industrial, pesticidal, and specialty chemicals and the law and business issues surrounding chemicals. B&C’s talented team of lawyers, scientists, and consultants will keep listeners abreast of the changing world of both domestic and international chemical regulation and provide analysis of the many intriguing and complicated issues surrounding this space. All Things Chemical™ is available now on iTunes, Spotify, Stitcher, and Google Play Music. Subscribe so you never miss an episode.
Register now for the American Bar Association (ABA) webinar “Navigating the Jurisdictional Tightrope Between Biopesticides, Biostimulants, and Related Emerging Technologies” with Bergeson & Campbell P.C. (B&C®) professionals deconstructing the jurisdictional boundaries distinguishing pesticides, biopesticides, plant regulators, biostimulants, and related technologies. The webinar will focus on draft EPA guidance intended to clarify the lines between and among those products that are subject to FIFRA registration as plant regulators and those biostimulant products not subject to FIFRA registration. The webinar also will focus on new and evolving chemistry and technology issues that may blur some jurisdictional lines or potentially move products from one category to another. Lynn L. Bergeson, Managing Partner, B&C; Lisa R. Burchi, Of Counsel, B&C; and Sheryl Dolan, Senior Regulatory Consultant, B&C, will present.
By Heather F. Collins, M.S. and Barbara A. Christianson
On February 12, 2020, the U.S. Environmental Protection Agency (EPA) announced the availability of 11 products that have been approved for use to disinfect surfaces against the emerging multidrug-resistant fungus Candida auris (C. auris). C. auris can cause severe infections and spreads easily among hospitalized patients and nursing home residents. The 11 products are approved for use against C. auris to disinfect surfaces in hospitals, nursing homes, and other healthcare facilities, to help reduce patient infections. There were no antimicrobial pesticide products registered specifically for use against C. auris prior these new use registrations.
EPA worked in collaboration with the Centers for Disease Control and Prevention (CDC) and other federal partners to ensure that the products would be effective against C. auris. Previously, on October 16, 2019, EPA had granted public health exemptions under the provisions of section 18 of the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) as amended, to the CDC, for uses of antimicrobial products, on hard, nonporous surfaces in healthcare settings for disinfection from C. auris.
The 11 products that are now registered for use against C. auris are:
- Avert Sporicidal Disinfectant Cleaner (EPA Reg. No. 70627-72);
- Blondie (EPA Reg. No. 67619-24);
- Dagwood (EPA Reg. No. 67619-25);
- Micro-Kill Bleach Germicidal Bleach Wipes (EPA Reg. No. 37549-1);
- Oxivir 1 (EPA Reg. No. 70627-74);
- Oxivir 1 Wipes (EPA Reg. No. 70627-77);
- Oxivir Wipes (EPA Reg. No. 70627-60);
- Oxycide™ Daily Disinfectant Cleaner (EPA Reg. No. 1677-237);
- Virasept (EPA Reg. No. 1677-226);
- Wonder Woman Formula B Germicidal Wipes (EPA Reg. No. 9480-12); and
- Wonder Woman Formula B Spray (EPA Reg. No. 9480-10).
Because there are few products with C. auris claims at this time, CDC and EPA have identified additional products that are effective against C. auris. Although these products do not yet have formal EPA-registered claims for C. auris, testing at CDC has confirmed they are effective against C. auris. The label on the product will not include instructions for C. auris. CDC guidance states to “follow the instructions provided for C. albicans, if included, or else follow those for fungicidal activity.” These products include:
- Oxivir TB Spray (EPA Reg. No. 70627-56); and
- PDI Super Sani-Cloth (EPA Reg. No. 9480-4).
The CDC Guidance further states that, if none of the above-listed products are available, or any of the EPA-registered products that are newly approved for the specific claims against C. auris, CDC recommends use of an EPA-registered hospital-grade disinfectant effective against Clostridioides difficile spores, because CDC believes these products have been used effectively against C. auris (List K).
Additional information on C. auris is available on EPA’s website and CDC’s website.
By Lisa M. Campbell, Timothy D. Backstrom, and James V. Aidala
On February 6, 2020, Corteva Agriscience (Corteva), announced it will discontinue all production of the organophosphate (OP) insecticide chlorpyrifos by the end of the year. Corteva and its corporate predecessor, Dow AgroSciences, have been the principal global manufacturers of chlorpyrifos. Corteva announced that its decision to stop selling chlorpyrifos was based entirely on financial considerations. This announcement came on the same day that Corteva had previously agreed it would end further sales of chlorpyrifos in California, and less than a week after the date the European Union (EU) ended all sales of chlorpyrifos in member states. These actions followed a number of prior actions taken by other national and state governments to ban or severely restrict chlorpyrifos. Corteva emphasized in its public statements that the science demonstrates that chlorpyrifos can be safely used, but that the company made a business decision based on the declining markets for the product. In an interview reported by the Washington Post, Susanne Wasson, Corteva's President for Crop Protection said, “It’s a tough decision for us to make, but we don’t feel like it’s viable going forward.” In other statements, Corteva noted that in the last ten years their share of the global chlorpyrifos market had declined from 75% to less than 20%.
Chlorpyrifos has been registered for use in the U.S. for over 50 years, but has become increasingly controversial in the dozen years since the Pesticide Action Network of North America and the Natural Resources Defense Council filed a petition in 2007 to cancel all registrations and revoke all tolerances for chlorpyrifos. Following a protracted court battle and a decision by the Ninth Circuit Court of Appeals to force the U.S. Environmental Protection Agency (EPA) to take final administrative action concerning the 2007 petition, EPA proposed near the end of the Obama Administration to revoke all existing tolerances for chlorpyrifos. A significant basis for this proposal was a controversial decision by a panel of EPA scientists that the default tenfold safety factor established by the Food Quality Protection Act (FQPA) for infants and children, which EPA had previously waived based on studies establishing a threshold for acetylcholinesterase (AChE) inhibition, should be reinstated.
The new EPA safety factor determination was based in large measure on epidemiology studies that reported an association between exposure to chlorpyrifos at levels below the presumed threshold for AChE inhibition and adverse neurodevelopmental effects in children. Many industry scientists disputed the scientific basis for this EPA determination because confounding exposures and methodological biases in the epidemiology studies may have influenced the reported association with neurodevelopmental effects and because the EPA determination made unprecedented use of epidemiology data. Beyond the effect on chlorpyrifos, the EPA decision will likely continue to be controversial because EPA included a similar safety factor determination for all OP pesticides, even though the mechanism responsible for the reported neurodevelopmental effects attributed to chlorpyrifos has not been identified and the other OP products were not studied in the epidemiology studies.
In the first year of the Trump Administration, EPA Administrator Scott Pruitt decided not to adopt EPA’s previously proposed tolerance revocation and instead to deny formally the 2007 petition, citing unresolved scientific issues. This reversal of course, however, was not accompanied by any new scientific assessment or by any explicit revision of the prior FQPA safety factor determination. Later, the California Department of Pesticide Regulation (DPR) decided to designate chlorpyrifos as a Toxic Air Contaminant, a decision that was noteworthy because it was based primarily on new toxicology studies that DPR stated reported neurodevelopmental effects well below the threshold for AChE inhibition. DPR deemphasized the epidemiology data relied on in the EPA safety factor determination in its decision. Although EPA later stated that it would address these new toxicology studies as part of an accelerated registration review process, there were intervening decisions by the EU and by California to ban new sales, which may have contributed to Corteva’s February 6, 2020, decision to cease chlorpyrifos production.
The decision by Corteva to cease manufacturing chlorpyrifos reminds us that the decision to continue marketing any chemical substance cannot be based solely on the scientific data, but must also consider the regulatory climate and the economic viability of the product. For those of us with a long memory, the decision by Corteva is reminiscent of the decision nearly 40 years ago by the Dow Chemical Company to pull the plug on 2,4,5-T and silvex, after Dow had expended millions of dollars and many years of effort to contest an emergency suspension and subsequent cancellation of these herbicides. Dow made this decision even though it believed that the available data demonstrated the safety of those products.
By Lynn L. Bergeson and Carla N. Hutton
The U.S. Environmental Protection Agency (EPA) announced on February 12, 2020, that it is seeking public input on a proposal to incorporate a new nanosilver pesticide product into textiles to combat odors, discoloration, and other signs of wear. The proposed registration decision is for NSPW Nanosilver, and the proposed pesticide product, Polyguard-NSPW Master Batch (Polyguard), will be incorporated into textiles to suppress bacteria, algae, fungus, mold, and mildew, which cause odors, discoloration, stains, and deterioration. According to EPA, based on its human health and ecological risk assessment, it has preliminarily determined that the new active ingredient in Polyguard meets the regulatory standard under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) for use as a materials preservative in textiles. EPA invites public comment on its proposal and preliminary findings. Comments are due March 13, 2020. More information is available in Docket ID EPA-HQ-OPP-2020-0043.
EPA notes that NSPW Nanosilver was the active ingredient in a previous conditional registration that it granted in 2015, for use as a materials preservative in textiles and plastics. As reported in our May 31, 2017, memorandum, that decision was challenged, and the U.S. Court of Appeals for the Ninth Circuit “vacated it on grounds that EPA’s public interest finding for granting the registration was without support in the record.” EPA states that the currently proposed product “is solely for use in specified textiles; therefore, Polyguard will have a more limited use authorization than the previously vacated conditional registration.” EPA notes that Polyguard will be formulated as a master batch, meaning that NSPW Nanosilver would be embedded within plastic beads or pellets, in contrast to the previous product registration, which was in the form of a liquid suspension.