By Timothy D. Backstrom and Lisa M. Campbell
On September 19, 2018, the California Department of Pesticide Regulation (DPR) proposed a regulation to designate chlorpyrifos as a toxic air contaminant (TAC). DPR states that this proposal is being presented “after an extensive period of scientific and public review.” The proposed rule is based on a final evaluation issued in July 2018, in which DPR’s Human Health Assessment (HHA) Branch determined that chlorpyrifos meets the quantitative criteria for designation as a TAC. To make that determination, DPR utilized an inhalation reference concentration (RfC) based on new animal studies with chlorpyrifos that reported neurodevelopmental effects at exposure levels well below the threshold for acetylcholinesterase (AChE) inhibition. More information on DPR’s final TAC evaluation is available in our blog item "California DPR Releases Final Toxic Air Contaminant Evaluation for Chlorpyrifos." In August 2018, DPR posted the Scientific Review Panel on TAC’s findings on chlorpyrifos and the Director’s Proposed Determination Concerning Chlorpyrifos as a TAC.
The U.S. Environmental Protection Agency (EPA) previously issued a determination that the default 10X safety factor for infants and children established by the Food Quality Protection Act (FQPA) should be retained for chlorpyrifos. This determination was based primarily on epidemiology studies that purported to show adverse neurodevelopmental outcomes in humans at exposure levels below the threshold for AChE inhibition, but the methodology used in these epidemiology studies has been harshly criticized by the pesticide industry. In contrast, the DPR TAC proposal is predicated on a determination that new animal studies with chlorpyrifos report neurodevelopmental effects below the threshold for AChE inhibition, and DPR views the epidemiology studies utilized by EPA to make its FQPA determination as providing corroboration for the animal data. At this juncture, it is not clear how EPA will characterize the new animal data concerning chlorpyrifos. In any case, questions are likely to remain concerning EPA’s use of data concerning chorpyrifos to establish the FQPA safety factor for other organophosphate (OP) pesticides.
More information on chlorpyrifos issues and California DPR regulations is available on our blog.
By Lisa M. Campbell and Timothy D. Backstrom
In July 2018, the California Environmental Protection Agency’s Department of Pesticide Regulation (DPR), Human Health Assessment (HHA) Branch, issued its final toxic air contaminant (TAC) evaluation of chlorpyrifos. This final TAC evaluation updates the December 2017 draft evaluation of chlorpyrifos as a TAC for the Scientific Review Panel (SRP) which updated the August 2017 draft and was reviewed by the SRP on TACs, and incorporates certain changes based on SRP recommendations. As part of their review of the December 2017 draft, the SRP recommended “additional and detailed review of developmental neurotoxicity studies, in particular recent in vivo animal studies as well as a more in depth analysis of human effects of chlorpyrifos” and “that DPR reevaluate the critical endpoints, the associated [(uncertainty factors (UF)], and the resulting [reference concentrations (RfC)] and [reference doses (RfD)] for each endpoint.”
DPR determines that a pesticide is a TAC for a non-cancer adverse effect if the projected air concentrations associated with use of the pesticide are more than one tenth of the inhalation RfC established based on animal toxicity and epidemiology data. In the draft TAC evaluation for chlorpyrifos, DPR utilized the threshold for red blood cell acetylcholinesterase (AChE) inhibition in humans and a target margin of exposure (MOE) of 100, including a factor of 10 intended to account for potential neurodevelopmental effects below the threshold for RBC AChE inhibition. In the final TAC evaluation for chlorpyrifos, DPR increased the MOE for AChE inhibition to 300, based on deficiencies in the human inhalation parameters used to model the threshold for AChE inhibition.
In addition, the final TAC evaluation establishes a new No Observed Effect Level (NOEL) for neurodevelopmental effects in animal studies with chlorpyrifos reported at exposure levels well below the threshold for AChE inhibition. Based on this NOEL, DPR has derived a new inhalation RfC for neurodevelopmental effects, using a standard MOE of 100 consisting of 10X for interspecies sensitivity and 10X for intraspecies variability. This new inhalation RfC based on neurodevelopmental effects in animal studies is about one-half the revised inhalation RfC based on the threshold for AChE inhibition. Because the modeled spray drift air concentrations for chlorpyrifos are more than one tenth of this new inhalation RfC, DPR concludes “that chlorpyrifos meets the criteria to be listed as a TAC pursuant to the law of California.”
In the final TAC evaluation for chlorpyrifos, DPR concluded that there is sufficient evidence from animal studies to establish a new NOEL for neurodevelopmental effects, which is well below the level that has been shown to cause AChE inhibition in the same animals. Although the U.S. Environmental Protection Agency (EPA) has previously issued a determination that the default 10X safety factor for infants and children established by the Food Quality Protection Act (FQPA) should be retained for chlorpyrifos, this determination was based on epidemiology studies that purported to show adverse neurodevelopmental outcomes in humans at exposure levels below the threshold for AChE inhibition. The methodology used in these epidemiology studies has been harshly criticized by the pesticide industry. DPR views these epidemiology studies as providing corroboration, but the new DPR risk assessment is predicated instead on DPR’s view that animal studies with chlorpyrifos report neurodevelopmental effects below the threshold for AChE inhibition. The DPR risk assessment based on these animal studies uses a standard MOE of 100. How EPA may or may not view DPR’s conclusion is not known. In light of the August 9, 2018, decision by the U.S. Court of Appeals for the Ninth Circuit (Ninth Circuit) directing EPA to proceed with revocation of all tolerances and cancellation of all registrations for chlorpyrifos, the effect of the DPR conclusion on EPA actions is not clear. Nevertheless, it is worth noting that, because the mechanism by which chlorpyrifos would cause such neurodevelopmental effects is unknown and is below the level that causes AChE inhibition, any presumption by EPA that other organophosphate (OP) pesticides may cause the same type of effects will likely be vigorously disputed by industry on scientific grounds.
Please see our blog item Ninth Circuit Directs EPA to Revoke all Tolerances and Cancel All Registrations for Chlorpyrifos for more information on the Ninth Circuit’s August 9, 2018, decision.
By Lisa M. Campbell and Margaret R. Graham
On April 23, 2018, the California Department of Pesticide Regulation (DPR) circulated a presentation entitled “Top 10 Agricultural Pesticide Use Violations of 2017” that identifies the top ten agricultural most common pesticide use violations of 2017 in California. The violations are listed from the least common (#10) to the most common (#1):
10. Handler Training, regulated under Title 3 of the California Code of Regulations (C.C.R.) § 6724(b-e). Examples of handler training violations listed in the presentation are: not updating employee training on a new pesticide handled; and not training employees prior to them mixing, loading, or applying pesticides.
9. Availability of Labeling, regulated under 3 C.C.R. § 6602. Examples of labeling availability violations listed in the presentation are: not having relevant Special Local Needs (SLN) labeling at the site when mixing, loading, or applying; and not having the labeling booklet on-site when mixing, loading, or applying.
8. Handler Decontamination Facilities, regulated under 3 C.C.R. § 6734. Examples of these types of violations listed in the presentation are: a handler using a backpack sprayer and not carrying a pint of eyewash when the label requires eye protection; and handlers using hand sanitizer instead of soap and water.
7. Service Container Labeling, regulated under 3 C.C.R. § 6678. Examples of service container labeling violations listed in the presentation are: not including the signal word on a service container label; and only putting the name of the pesticide on the service container.
6. Hazard Communication for Fieldworkers, regulated under 3 C.C.R. § 6761. Examples of these types of violations listed in the presentation are: not completing the required fields on the displayed Pesticide Safety Information Series (PSIS) A-9 leaflet; and not providing Safety Data Sheets (SDS) for the pesticides listed on the pesticide use records.
5. Annual Registration with County Agricultural Commissioner by Anyone Who Intends to Advertise, Solicit, or Operate as a Pest Control Business in California, regulated under California Food and Agriculture Code (FAC) § 11732. An example of a violation is not registering with the county in which such a business intends to work prior to performing pest control activities.
4. Application-Specific Information (ASI) for Fieldworkers, regulated under 3 C.C.R. § 6761.1. Examples of violations listed in the presentation are: not including the start and stop times, Restricted Entry Interval (REI), or active ingredient in the displayed information; and not displaying the ASI before fieldworkers work in a treated field.
3. Emergency Medical Care Requirements, regulated under 3 C.C.R. § 6726. Examples of violations listed in the presentation are: not taking employees suspected of a pesticide illness to the doctor immediately; and not posting the name, address, and phone number of the medical facility at the worksite or in the work vehicle before employees begin handling pesticides.
2. Personal Protective Equipment (PPE) Requirements, regulated under 3 C.C.R. § 6738. Examples of violations listed in the presentation are: storing PPE in the same place pesticides are stored; and not cleaning PPE and checking for wear after each use.
1. Labeling and Permit Condition Compliance, regulated under FAC § 12973. Examples of violations listed in the presentation are: not following label-required buffer zone, set back distance, or vegetative buffer strip requirements; and applying a pesticide to a site or crop not listed on the labeling.
DPR states that it “recommends and encourages continuing education (CE) course sponsors [to] integrate this information into … future CE courses,” and asks for help “in promoting lawful pesticide use practices by encouraging [CE] attendees to review these agricultural pesticide use violations as they relate to their operations, to assure they are in compliance with federal and California pesticide use requirements.”
By Lisa R. Burchi and Lisa M. Campbell
On January 3, 2018, the California Department of Pesticide Regulation (DPR) issued Notice 2018-01: Expanding Use of Pesticide Products Under Reevaluation. Under Notice 2018-01, effective immediately, DPR will not act upon an Application for Pesticide Registration or an Application to Amend a Pesticide Product if it determines the registration or acceptance would potentially “expand use” of an active ingredient or pesticide product currently under reevaluation until the conclusion of the reevaluation.
DPR states that it commences a reevaluation of an existing registered pesticide when it finds, based on an investigation of all reported episodes and information received, that a significant adverse impact to human health or the environment has occurred or is likely to occur. DPR states that the policy set forth in Notice 2018-1 is needed for pesticides under reevaluation because until DPR reviews existing data for substances under reevaluation, determines whether additional data to satisfy reevaluation data requirements must be submitted, and then receives and assesses additional data applicable to the reevaluation that can mitigate the concern that prompted the initiation of the reevaluation, DPR “is not in a position to determine that an expanded use will not cause a ‘significant adverse environmental impact,’ as required under its certified regulatory program (3 CCR section 6254).” Once the reevaluation process is completed, DPR states that it will then be in a position, in light of its reevaluation determination, to consider applications for product registration or amendment.
Scope of Notice 2018-1
DPR is currently reevaluating certain pesticide products containing the following active ingredients:
- Copper-based antifouling paints (copper oxide, copper hydroxide, and cuprous thiocyanate);
- Diazinon; and
- Nitroguanidine neonicotinoids (imidacloprid, thiamethoxam, clothianidin, and dinotefuran).
This notice applies to new pesticide products that include these active ingredients, including supplemental distributor registrations (subregistrations) and amendments to currently registered pesticide products, when “expanding use” of the active ingredient relevant to the concern that prompted the reevaluation.
Specifically, DPR states in Notice 2018-1 that it interprets the following types of actions, related to a new or amended product containing the active ingredient under reevaluation, as examples of “expanding use”:
- A proposed new pesticide product, including any Special Local Needs registration or Experimental Use Permit, with a label bearing uses or exposure scenarios relevant to the concern that prompted the reevaluation. This includes any product label that is identical or substantially similar to a currently registered product in California.
- Amendment of a currently registered product to add or modify uses or exposure scenarios relevant to the concern that prompted the reevaluation, even if such use is already on other currently registered pesticide products in California. Examples of such changes include:
- New or modified uses (e.g., new crops, pests, or use sites);
- New or modified use patterns (e.g., adding aerial, aquatic, soil applications, or outdoor use);
- Significant formulation changes (unless prompted by the reevaluation);
- Increased application rates or total use amount allowed (e.g., acreage or frequency of application); and
- Other label additions or changes that may increase pesticide exposure in a manner that is relevant to the basis for the reevaluation.
This notice does not preclude expanded use of a product if the expansion is not consistent with uses or exposure scenarios relevant to the concern that prompted the reevaluation. As an example, DPR states that an application containing an active ingredient that is under reevaluation over concerns regarding exposure to wildlife would not be precluded under this notice as an expanded use is if the product is labeled solely for indoor use, with no potential wildlife exposure.
DPR also acknowledges that a pest management or public health need could arise during a reevaluation that would support the issuance of an Emergency Exemption request under Section 18 of the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA). In those cases, with regard to the potential applicability of Notice 2018-1, DPR states that it “will assess the request by relying on currently available information and risk mitigation strategies.”
DPR’s reevaluation process can take years to complete, so not only are pending affected submissions for products containing the active ingredients at issue effectively frozen, but future submissions for active ingredients newly entering the reevaluation process could be halted potentially for lengthy periods of time, despite the fact that DPR may ultimately determine that any identified “expanded uses” do not cause a significant adverse environmental impact. It is an initiative that many in industry are monitoring closely.
More information on other California DPR-related issues is available on our blog under key phrase California DPR.
By Lisa M. Campbell and Lisa R. Burchi
On May, 24, 2017, the California Department of Pesticide Regulation (DPR) issued guidance regarding its Notice 2015-13 to applicants registering pesticide impregnated materials bearing pesticide claims to be sold and distributed into or within California, per Notice 2015-13, issued December 11, 2015. Each retailer (or authorized representative) of an affected product must submit an Application for Pesticide Registration (DPR-REG-030) to DPR by July 1, 2017.
The guidance includes information on the registration requirements, as well as:
More details on the requirements are available in our blog items California Issues Notice Requiring Registration for Products Made From Pesticide Impregnated Materials and Bearing Pesticide Claims and California DPR Extends Filing Date to Register Pesticide Impregnated Products.
By Lisa M. Campbell and Lisa R. Burchi
On February 22, 2017, the California Department of Pesticide Regulation (DPR) announced it was extending the filing date for applications to register products made from pesticide impregnated materials bearing pesticide claims from March 1, 2017, to July 1, 2017. Specifically, each retailer (or authorized representative) of an affected product must submit an Application for Pesticide Registration (DPR-REG-030) to DPR by July 1, 2017. DPR’s California Notice 2015-13 issued on December 11, 2015, informed pesticide product registrants and stakeholders of DPR’s intention to register products made with pesticide impregnated materials and bearing pesticide claims.
The February 22 notice also states the following in terms of the requirements:
- Each company with products made from pesticide impregnated material and sold under their own company name into or within California is required to register the product(s) as a pesticide;
- The product must bear a federally approved pesticide label; DPR will assign a separate California-only registration number for purposes of tracking sales and use of the products in California;
- Each company will need to obtain at least one registration for each use category of product sold (e.g., the apparel use category includes wearable items such as jackets, shirts, hats, socks, pants, and shorts; the non-apparel use category includes non-wearable items such as bedding, tents, seat covers, chopping blocks, shower curtains, and mouse pads); and
- If items are impregnated with different pesticides or different percentages of the same pesticide, separate registrations will be required.
The requirements set forth in this notice do not apply to products that satisfy the requirements to be a treated article, including the requirement that any claims be related to protection of the article/substance itself. The notice applies instead to those pesticide impregnated materials that include pesticidal claims that are not limited to protection of the material. More information on the December 2015 notice is available in our blog item California Issues Notice Requiring Registration for Products Made From Pesticide Impregnated Materials and Bearing Pesticide Claims.
By Lisa R. Burchi and Lisa M. Campbell
On December 11, 2015, the California Department of Pesticide Regulation (DPR) issued California Notice 2015-13 that will require each person/company with products made from pesticide impregnated material that are sold into or within California under their own company name to register their product(s) as a pesticide. Examples of pesticide impregnated materials affected by this Notice include apparel (e.g., jackets, shirts, hats, socks, pants, shorts) and non-apparel (e.g., bedding, tents, seat covers, chopping blocks, shower curtains, mouse pads) that make pesticidal claims.
The requirements will be effective November 1, 2016.
DPR currently registers a number of pesticide impregnated textiles bearing pesticidal claims. DPR notes that while these products have been registered either by the manufacturer of the pesticide impregnated material or by the company impregnating the bolts of fabric or clothing, individual companies selling items made from pesticide impregnated textiles were not required to register the materials. Instead, such companies were required only to obtain a pesticide broker’s license from DPR. Under DPR’s new policy, “obtaining a broker’s license will no longer be sufficient for companies selling products under their own company label” (emphasis in original). DPR states it is making this change to “facilitate tracking the use of these products in California and aid in the understanding of potential impacts on water quality and human health.”
With regard to registration requirements for pesticide impregnated products, DPR states that the number of registrations required will depend on several factors, including whether there are different pesticide active ingredients, different percentages of active ingredients, different types of fabrics, and/or different product uses. DPR states that if the product contains the same type and percentage of active ingredient, one registration can be used to cover various types of pesticide impregnated apparel or non-apparel product use categories, but such determination will be made on a case-by-case basis. As an example of products requiring separate registrations, DPR states: “If, for example, a person/company sells apparel impregnated with 0.52% of the active ingredient permethrin and other apparel impregnated with 0.48% of the active ingredient permethrin, two separate apparel registrations will be required because they contain different percentages of active ingredient. The same holds true for a category of non-apparel products.”
This Notice is a significant change in policy, and will impose potentially complicated and costly registration requirements on companies that sell pesticide impregnated material under their own company name but are not necessary familiar with pesticide registration requirements. The number of new registrations that could be required could be substantial considering the number of factors DPR has specified that could trigger separate registrations.
Importantly, DPR clarifies that this Notice is not intended to change its general policy exempting from registration those products that satisfy the requirements to be a treated article. DPR notes that for treated articles, the pesticide, and any related claims, must be related to protection of the article/substance itself. These products are thus distinguishable from pesticide impregnated materials that include pesticidal claims that are not limited to protection of the material.
By Lisa R. Burchi
The California Department of Pesticide Regulation (DPR) has extended, from February 27, 2015, to Friday, March 13, 2015, the submission of written comments following DPR’s January 14, 2015, Registration Fee Workshop where DPR discussed the potential increase in registration fees for pesticide products pursuant to Food and Agricultural Code (FAC) § 12812(a).
Under the proposal, DPR would increase fees for applications and renewals from $750 to $1,150, decrease fees for certain label amendments supported by scientific data from $100 to $25, and create a new fee of $25 for label amendments not supported by scientific data, including substantive label amendments, non-substantive label amendments, label changes required by the U.S. Environmental Protection Agency or any other federal or state agency, amendments to the formulation of the pesticide product, and notifications.