Pesticide registration, cancellation, etc.: Simazine,


[Federal Register: June 21, 2006 (Volume 71, Number 119)]


[Page 35669-35671]

From the Federal Register Online via GPO Access []



[EPA-HQ-OPP-2005-0151; FRL-8065-2]

Simazine; Reregistration Eligibility Decision; Notice of Availability

AGENCY: Environmental Protection Agency (EPA).

ACTION: Notice.

SUMMARY: This notice announces the availability of EPA's Reregistration Eligibility Decision (RED) for the chlorinated triazine pesticide simazine, and opens a public comment period on this document, related risk assessments, and other support documents. Simazine is a systemic herbicide that is usually applied to soil, absorbed through leaves and roots, and acts by inhibiting photosynthesis within the targeted plant. It is widely used as a selective herbicide to control most annual grasses and broadleaf weeds before they emerge or after removal of weed growth. EPA has reviewed simazine through the public participation process that the Agency uses to involve the public in developing pesticide reregistration and tolerance reassessment decisions. Through these programs, EPA is ensuring that all pesticides meet current health and safety standards.

The Agency is concurrently issuing for public comment the Triazine Cumulative Risk Assessment; see EPA-HQ-OPP-2005-0481 in the Notice section of this issue of the Federal Register.

DATES: Comments must be received on or before August 21, 2006.

ADDRESSES: Submit your comments, identified by docket identification (ID) number EPA-HQ-OPP-2005-0151, by one of the following methods:

Federal eRulemaking Portal:

Follow the on-line instructions for submitting comments.

Mail: Office of Pesticide Programs (OPP) Regulatory Public Docket (7502P),

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Environmental Protection Agency, 1200 Pennsylvania Ave., NW., Washington, DC 20460-0001.

Delivery: OPP Regulatory Public Docket (7502P), Environmental Protection Agency, Rm. S-4400, One Potomac Yard (South Building), 2777 S. Crystal Drive, Arlington, VA. Deliveries are only accepted during the Docket's normal hours of operation (8:30 a.m. to 4 p.m., Monday through Friday, excluding legal holidays). Special arrangements should be made for deliveries of boxed information. The Docket telephone number is (703) 305-5805.

Instructions: Direct your comments to docket ID number EPA-HQ-OPP- 2005-0151. EPA's policy is that all comments received will be included in the docket without change and may be made available on-line at, including any personal information

provided, unless the comment includes information claimed to be Confidential Business Information (CBI) or other information whose disclosure is restricted by statute. Do not submit information that you consider to be CBI or otherwise protected through or e- mail. The Federal website is an ``anonymous access'' system, which means EPA will not know your identity or contact information unless you provide it in the body of your comment. If you send an e-mail comment directly to EPA without going through, your e-mail address will be automatically captured and included as part of the comment that is placed in the docket and made available on the Internet. If you submit an electronic comment, EPA recommends that you include your name and other contact information in the body of your comment and with any disk or CD-ROM you submit. If EPA cannot read your comment due to technical difficulties and cannot contact you for clarification, EPA may not be able to consider your comment. Electronic files should avoid the use of special characters, any form of encryption, and be free of any defects or viruses.

Docket: All documents in the docket are listed in the docket index. Although listed in the index, some information is not publicly available, e.g., CBI or other information whose disclosure is restricted by statute. Certain other material, such as copyrighted material, is not placed on the Internet and will be publicly available only in hard copy form. Publicly available docket materials are available either in the electronic docket at ,or, if only available in hard copy, at the OPP

Regulatory Public Docket in Rm. S-4400, One Potomac Yard (South Building), 2777 S. Crystal Drive, Arlington, VA. The hours of operation of this Docket Facility are from 8:30 a.m. to 4 p.m., Monday through Friday, excluding legal holidays. The Docket telephone number is (703) 305-5805.

FOR FURTHER INFORMATION CONTACT: Diane Sherman, Special Review and Reregistration Division (7508P), Office of Pesticide Programs, Environmental Protection Agency, 1200 Pennsylvania Ave., NW., Washington, DC 20460-0001; telephone number: (703) 308-0128; fax number: (703) 308-8005; e-mail address:


  1. General Information

    1. Does this Action Apply to Me?

      This action is directed to the public in general, and may be of interest to a wide range of stakeholders including environmental, human health, and agricultural advocates; the chemical industry; pesticide users; and members of the public interested in the sale, distribution, or use of pesticides. Since others also may be interested, the Agency has not attempted to describe all the specific entities that may be affected by this action. If you have any questions regarding the applicability of this action to a particular entity, consult the person listed under FOR FURTHER INFORMATION CONTACT.

    2. What Should I Consider as I Prepare My Comments for EPA?

      1. Submitting CBI. Do not submit this information to EPA through or e-mail. Clearly mark the part or all of the information that you claim to be CBI. For CBI information in a disk or CD ROM that you mail to EPA, mark the outside of the disk or CD ROM as CBI and then identify electronically within the disk or CD ROM the specific information that is claimed as CBI. In addition to one complete version of the comment that includes information claimed as CBI, a copy of the comment that does not contain the information claimed as CBI must be submitted for inclusion in the public docket. Information so marked will not be disclosed except in accordance with procedures set forth in 40 CFR part 2.

      2. Tips for preparing your comments. When submitting comments, remember to:

      i. Identify the document by docket number and other identifying information (subject heading, Federal Register date and page number).

      ii. Follow directions. The agency may ask you to respond to specific questions or organize comments by referencing a Code of Federal Regulations (CFR) part or section number.

      iii. Explain why you agree or disagree; suggest alternatives and substitute language for your requested changes.

      iv. Describe any assumptions and provide any technical information and/or data that you used.

      v. If you estimate potential costs or burdens, explain how you arrived at your estimate in sufficient detail to allow for it to be reproduced.

      vi. Provide specific examples to illustrate your concerns, and suggest alternatives.

      vii. Explain your views as clearly as possible, avoiding the use of profanity or personal threats.

      viii. Make sure to submit your comments by the comment period deadline identified.

  2. Background

    1. What Action is the Agency Taking?

      Under section 4 of the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA), EPA is reevaluating existing pesticides to ensure that they meet current scientific and regulatory standards. EPA has completed a Reregistration Eligibility Decision (RED) for the chlorinated triazine pesticide, simazine, under section 4(g)(2)(A) of FIFRA. Simazine is widely used as a selective herbicide and registered for use on a variety of food and feed crops, including, but not limited to, fruit and nut crops in addition to corn. Simazine can also be applied at forestry sites and on turfgrass grown commercially for sod. Simazine is registered for residential use on turfgrass including both commercial use on recreational lawns such as golf courses and commercial or homeowner use on lawns. An algaeicide use exists for ornamental ponds and aquariums of 1,000 gallons or less. End-use products containing simazine are formulated as pellets/tablets, dry flowables, emulsifiable concentrates, flowable concentrates, and ready- to-use liquids. These product formulations may be applied on the ground by broadcast across an area, as a spot treatment, or in rows, which is also referred to as band treatment.

      The simazine RED presents the Agency's conclusions on the risks posed by exposure to simazine alone; however, section 408(b)(2)(D)(v) of the Federal Food, Drug and Cosmetic Act (FFDCA) directs the Agency also to consider available information on the cumulative risk from substances sharing a common

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      mechanism of toxicity. Simazine shares a neuroendocrine mechanism of toxicity, which results in both reproductive and developmental consequences, with the structurally-related chlorinated triazine pesticides atrazine and propazine. Because these chlorinated triazine pesticides share a common mechanism of toxicity, the Agency evaluated the cumulative risk posed by this group while making final reregistration eligibility decisions on individual chlorinated triazines.

      EPA has determined that the data base to support reregistration is substantially complete and that products containing simazine are eligible for reregistration provided the risks are mitigated either in the manner described in the RED or by another means that achieves equivalent risk reduction. Upon submission of any required product specific data under section 4(g)(2)(B) and any necessary changes to the registration and labeling (either to address concerns identified in the RED or as a result of product specific data), EPA will make a final reregistration decision under section 4(g)(2)(C) for products containing simazine.

      EPA must review tolerances and tolerance exemptions that were in effect when the Food Quality Protection Act (FQPA) was enacted in August 1996, to ensure that these existing pesticide residue limits for food and feed commodities meet the safety standard established by the new law. Tolerances are considered reassessed once the safety finding has been made or a revocation occurs. EPA has reviewed and made the requisite safety finding for the simazine tolerances included in this notice.

      EPA is applying the principles of public participation to all pesticides undergoing reregistration and tolerance reassessment. The Agency's Pesticide Tolerance Reassessment and Reregistration; Public Participation Process, published in the Federal Register of May 14, 2004, (69 FR 26819)(FRL-7357-9) explains that in conducting these programs, EPA is tailoring its public participation process to be commensurate with the level of risk, extent of use, complexity of issues, and degree of public concern associated with each pesticide. Due to its refined risk assessment and the relatively limited risk management issues associated with this pesticide, simazine was reviewed through the modified four-phase process. Through this process, EPA worked extensively with stakeholders and the public to reach the regulatory decisions for simazine.

      The reregistration program is being conducted under Congressionally mandated time frames, and EPA recognizes the need both to make timely decisions and to involve the public. The Agency is issuing the simazine RED for public comment. This comment period is intended to provide an additional opportunity for public input and a mechanism for initiating any necessary amendments to the RED. All comments should be submitted using the methods in ADDRESSES, and must be received by EPA on or before the closing date. These comments will become part of the Agency Docket for simazine. Comments received after the close of the comment period will be marked ``late.'' EPA is not required to consider these late comments.

      The Agency will carefully consider all comments received by the closing date and will provide a Response to Comments Memorandum in the Docket and If any comment significantly affects the document, EPA will also publish an amendment to the RED in the Federal Register. In the absence of substantive comments requiring changes, the simanzine RED will be implemented as it is now presented.

    2. What is the Agency's Authority for Taking this Action?

      Section 4(g)(2)(A) of FIFRA, as amended, requires the Aministrator to make ``a determination as to the eligibility for reregistration (i) for all active ingredients subject to reregistration under this section for which tolerances or exemptions from tolerances are required under the Federal Food, Drug, and Cosmetic Act (21 U.S.C. 301 et seq.), not later than the last date for tolerance reassessment established under section 408(q)(1)(C) of that Act (21 U.S.C. 346a(q)(1)(C)) . . . .''

      Section 408(q) of the FFDCA, 21 U.S.C. 346a(q), requires EPA to review tolerances and exemptions for pesticide residues in effect as of August 2, 1996, to determine whether the tolerance or exemption meets the requirements of section 408(b)(2) or (c)(2) of FFDCA. This review is to be completed by August 3, 2006. A tolerance or exemption meets the requirements of section 408(b)(2) or (c)(2), respectively, if ``the Administrator determines [the pesticide chemical residue] is safe'', i.e., ``that there is a reasonable certainty that no harm will result from aggregate exposure to the pesticide chemical residue, including all anticipated dietary exposures and all other exposures for which there is reliable information.'' 21 U.S.C. 346a(b)(2)(A), (c)(2)(A). In making this safety finding, FFDCA requires the Administrator to consider, among other factors, ``available information concerning the cumulative effects of such residues and other substances that have a common mechanism of toxicity . . . .'' 21 U.S.C. 346a(b)(2)(D)(v), (c)(2)(B).

      List of Subjects

      Environmental protection, Pesticides and pests.

      Dated: June 9, 2006. Debra Edwards, Director, Special Review and Reregistration Division, Office of Pesticide Programs.

      [FR Doc. E6-9462 Filed 6-20-06; 8:45 am]

      BILLING CODE 6560-50-S