United States Prevention, Pesticides EPA OPP-2005-0293 Environmental Protection And Toxic Substances June 14, 2006 Agency (7508C) _________________________________________________________________ Reregistration Eligibility Decision for Cypermethrin (revised 01/14/08) List B Case No. 2130 TABLE OF CONTENTS Cypermethrin Reregistration Eligibility Decision Team .......................................................... 5 Glossary of Terms and Abbreviations ........................................................................................ 6 Executive Summary...................................................................................................................... 8 I. Introduction ................................................................................................................... 14 II. Chemical Overview........................................................................................................ 15 A. Regulatory History.................................................................................................. 15 B. Chemical Identification .......................................................................................... 16 C. Use Profiles .............................................................................................................. 17 III. Summary of Cypermethrin Risk Assessments..................................................... 18 A. Human Health Risk Assessment............................................................................ 19 1. Toxicity ...............................................................................................................................................19 2. FQPA Safety Factor...........................................................................................................................21 3. Dermal Absorption ............................................................................................................................22 4. Dietary Exposure ...............................................................................................................................22 a. Acute Dietary Exposure (food only).................................................................................................22 b. Chronic Dietary Exposure (food only) ........................................................................................23 5. Drinking Water Exposure.................................................................................................................23 6. Residential Exposure and Risk.........................................................................................................23 a. Residential Handler Risk ..................................................................................................................24 b. Residential Post-application Risk ................................................................................................24 7. Aggregate Exposure and Risk (food, drinking water, and residential).........................................25 a. Acute Aggregate Risk (food and drinking water) ...........................................................................25 b. Short-term Aggregate Risk (food, drinking water, and residential).........................................26 c. Chronic Aggregate Risk (food and drinking water) .......................................................................26 8. Occupational Exposure and Risk .....................................................................................................26 a. Occupational Handler Risk...............................................................................................................27 b. Occupational Post-application Risk ............................................................................................28 9. Human Incident Data ........................................................................................................................28 B. Environmental Risk Assessment ........................................................................... 29 1. Environmental Fate and Transport .................................................................................................29 2. Ecological Risk ...................................................................................................................................30 a. Risk to Aquatic Organisms ...............................................................................................................30 b. Risk to Terrestrial Organisms .....................................................................................................37 c. Ecological Incidents ...........................................................................................................................39 d. Endangered Species Concerns .....................................................................................................39 IV. Risk Management, Reregistration, and Tolerance Reassessment Decision ...... 41 A. Determination of Reregistration Eligibility and Tolerance Reassessment........ 41 B. Public Comments and Responses .......................................................................... 41 C. Regulatory Position................................................................................................. 42 1. Food Quality Protection Act Findings .............................................................................................42 2. Endocrine Disruptor Effects .............................................................................................................43 3. Cumulative Risks ...............................................................................................................................43 D. Tolerance Reassessment Summary ....................................................................... 44 E. Regulatory Rationale.............................................................................................. 45 1. Human Health Risk Mitigation ........................................................................................................46 2. Environmental Risk Mitigation ........................................................................................................48 3. Benefits of Cypermethrin Use and Available Alternatives.............................................................56 V. What Registrants Need to Do ....................................................................................... 56 A. Manufacturing Use Products................................................................................. 57 1. Additional Generic Data Requirements...........................................................................................57 Page 3 of 113 2. Labeling Requirements .....................................................................................................................57 3. Spray Drift Management ..................................................................................................................57 B. End-Use Products.................................................................................................... 57 1. Additional Product-Specific Data Requirements.................................................................................57 2. Labeling for End-Use Products .............................................................................................................58 APPENDIX A. Uses of Cypermethrin Eligible for Reregistration......................................... 79 APPENDIX B. Table of Generic Data Requirements and Studies Used to Make the Reregistration Decision for Cypermethrin............................................................................... 88 APPENDIX C: Technical Support Documents....................................................................... 93 APPENDIX D. Citations Considered to be Part of the Data Base Supporting the Reregistration Eligibility Decision............................................................................................. 95 APPENDIX E: Generic Data Call-In..................................................................................... 112 APPENDIX F: Product Specific Data Call-In....................................................................... 113 Page 4 of 113 Cypermethrin Reregistration Eligibility Decision Team Office of Pesticide Programs: Environmental Fate and Effects Risk Assessment Miachel Rexrode José Luis Meléndez Health Effects Risk Assessment William H. Donovan Pamela M. Hurley John Doherty Seyed Tadayon Biological and Economic Analysis Division Alan Halvorson Registration George LaRocca Risk Management Yan Donovan Véronique LaCapra Dirk V. Helder Page 5 of 113 Glossary of Terms and Abbreviations AGDCI Agricultural Data Call-In ai Active Ingredient aPAD Acute Population Adjusted Dose AR Anticipated Residue BCF Bioconcentration Factor CFR Code of Federal Regulations cPAD Chronic Population Adjusted Dose CSF Confidential Statement of Formula CSFII USDA Continuing Surveys for Food Intake by Individuals DCI Data Call-In DEEM Dietary Exposure Evaluation Model DFR Dislodgeable Foliar Residue DWLOC Drinking Water Level of Comparison. EC Emulsifiable Concentrate Formulation EDWC Estimated Drinking Water Concentration EEC Estimated Environmental Concentration EPA Environmental Protection Agency EUP End-Use Product FDA Food and Drug Administration FIFRA Federal Insecticide, Fungicide, and Rodenticide Act FFDCA Federal Food, Drug, and Cosmetic Act