Active Ingredient: 1,3-Dichloropropene (Telone)
Human Health Risk Assessment and Mitigation
Documents and Activities

Risk Characterization Documents (RCDs) estimate the nature and likelihood of adverse health effects in humans who may be exposed to pesticides.

• December 2022 - Exposure Estimates, Margins of Exposure, and Cancer Risk Estimates for Tarp Cutters Exposed to 1,3-Dichloropropene (PDF)
• June 2017 - Revision of Human Equivalent Concentrations, Margins of Exposure, Air Unit Risk and Cancer Risk Values for Occupational Seasonal, Annual and Lifetime Exposure Scenarios (PDF)
• October 2016 – Updated (No December Applications Allowed) Simulation of Cancer Risks Associated with Different Township Cap Scenarios of Merced County for 1,3-Dichloropropene (PDF)
• December 2015 – Risk Characterization Document (PDF)
  • February 2023 – Erratum Table IV.8 (PDF)
• August 2015 – Draft Risk Characterization Document (PDF)
  • November 2016 – Responses to comments by Registrant (PDF)
  • September 2016 – Responses to comments by Dr. Weisueh A. Chiu (PDF)
  • September 2016 – Responses to comments by Dr. Richard A. Fenske (PDF)
  • September 2016 – Responses to comments by Dr. Urmila P. Kodavanti (PDF)
  • September 2016 – Responses to comments by U.S. EPA (PDF)
  • August 2016 – Responses to comments by OEHHA (PDF)
• January 1997 – Risk Assessment (PDF)
• July 1994 – Human Exposure Assessment (PDF)

Other Documents

• August 2017 – Methyl Bromide, 1,3-Dichloropropene, and Chloropicrin Air Monitoring Results for 2010-2016
• July 2017 - Responses to the European Food Safety Authority-Member State Draft Risk Assessment on 1,3-Dichloropropene (PDF)
• November 2016 – Summary of Ambient Air Monitoring for 1,3-Dichloropropene, Methyl Bromide and Chloropicrin, 2010-2015 (PDF)
• August 2016 – Calculation of Intermediate-Term Residential Exposures Using Measured Air Concentrations from the Ambient Air Monitoring Network (PDF)
• August 2015 – Variability in Simulated Chloropicrin and 1,3 Dichloropropene Volatilization from High Density Polyethylene and Totally Impermeable Film Tarped Broadcast Applications (PDF)
• May 2015 – Summary of Ambient Air Monitoring for 1,3-Dichloropropene, Methyl Bromide and Chloropicrin, 2010 - 2014
• September 2014 – Methyl Bromide and 1,3-Dichloropropene Air Monitoring Results
• August 2014 – Evaluation of "2013 Pesticide Use Data of Adjusted Pounds 1,3-Dichloropropene in California," Submitted by Dow AgroSciences on 04/25/14 (PDF)
• August 2014 – Comparison of One-Year Township Monitoring Results from Merced to SOFEA Simulation Results (PDF)
• June 2014 – Calculations of Use Adjustment Factors for 1,3-Dichloropropene with the Use of Totally Impermeable Film for Strip Shank Applications (PDF)
• June 2014 – HYDRUS Estimates of Cumulative 1,3-Dichloropropene and Chloropicrin Emissions from Low Permeability Tarp Strip Applications (PDF)
• May 2014 – How to Calculate the Application Factor for New 1,3-Dichloropropene Application Methods (PDF)
• October 2013 – Results from Sampling for Phosgene Using Salad Devices Positioned on Tarped Bedded Field Treated with Chloropicrin and 1,3-Dichloropropene (PDF)
• May 2013 – Analysis of 1,3-Dichloropropene Emissions for Field One in the Lost Hills Study Considering High Flux Densities from the Bare Ground Near the Tarp Edge (PDF)
• April 2013 – Calculation of Use Adjustment Factors for 1,3-Dichloropropene with the Use of Totally Impermeable Film for Broadcast Shank Applications (PDF)
• March 2013 – Correction of Cumulative Volatilization Percentages as found in [0199-0138] (PDF)
• February 2013 – HYDRUS Simulation of Chloropicrin and 1,3-Dichloropropene Transport and Volatilization in the Lost Hills Fumigation Trials (PDF)
• December 2012 – Reanalysis of Lost Hills Data for Consistency and Error Detection (PDF)
• December 2011 – Compilation of Studies Estimating Near Surface Concentrations of 1,3-Dichloropropene or Chloropicrin (PDF)
• January 2011 – Simulation of Three Untarped 1,3-Dichloroproprene Flux Studies using HYDRUS (PDF)
• December 2009 – Subchronic 1,3-Dichloropropene Air Concentration Estimates (PDF)
• December 2009 – Calculation of Screening Concentrations for 1,3-Dichloropropene (PDF)
• September 2009 – Review of Proposed Update to the California Management Plan (PDF)
• January 2009 – Preliminary Evaluation of Dow AgroSciences Proposed Update to the California Management Plan: 1,3-Dichloropropene (July 15, 2008) (PDF)
• June 2008 – Use of LEACHM Model, LEACHP Version to Predict Volatilization Component of a Pesticide Lost from a Field Application (PDF)
• April 2008 – Summary of Ambient Air Monitoring for Methyl Bromide and 1,3-Dichloropropene
• March 2008 – Calculation of Method Use Fractions for 1,3-Dichloropropene (PDF)
• September 2007 – Report on Ambient Air Monitoring For Methyl Bromide and 1,3-Dichloropropene In Ventura County during June, July and August 2006
  • Appendix A-E
• April 2007 – Simulation of Concentrations and Exposure Associated with Updated Township Caps for Merced County for 1,3-Dichloropropene (PDF)
• March 2007 – Simulation of Concentrations and Exposure Associated with Dow AgroSciences - Proposed Township Caps for Merced County for 1,3-Dichloropropene (PDF)
• March 2007 – Simulation of Concentrations and Exposure Associated with Dow AgroSciences - Proposed Township Caps for Ventura County for 1,3-Dichloropropene (PDF)
• December 2006 – Estimating Residential Mobility for the Assessment of Lifetime Exposure to 1,3-Dichloropropene (PDF)
• November 2006 – Report on Ambient Air Monitoring For Methyl Bromide and 1,3-Dichloropropene In Ventura County during August and September 2005
  • Figures, Laboratory Report, Photos
• June 2005 – >Monitoring a 1,3-Dichloropropene/Metam Sodium Application in Del Norte County
  • Appendices, Laboratory Method
• May 2005 – Interim Statewide Caps Analysis for 1,3-Dichloropropene (PDF)
• February 2005 – Variability in Daytime Stability Class Designation under Partly Foggy Conditions in a Monitoring Study (PDF)
• May 2004 – Evaluation of the Need to Revise the Occupational Exposure Assessment for 1,3-Dichloropropene (PDF)
• May 2004 – Pesticide Product Label Evaluation: Telone C-17 CA (PDF)
• May 2004 – Pesticide Product Label Evaluation: Telone C-35 CA (PDF)
• May 2004 – Pesticide Product Label Evaluation: Telone II CA (PDF)
• April 2004 – Review of Data to Support Request to Decrease Buffer Zone for 1,3-Dichloropropene to 100 Feet (Registration Tracking ID #204019, #204020, and #205697) (PDF)
• March 2004 – Revised Exposures to 1,3-Dichloropropene in Kern County Based on Corrected Data for the Summer 2001 Monitoring by the California Air Resources Board (PDF)
• January 2003 – Review of "Supporting Information for California Management Plan for Telone® and In-Line® Fumigants" from Dow AgroSciences (Assignment 03-0005) (PDF)
• September 2002 – Exposures to 1,3-Dichloropropene in Monterey and Santa Cruz Counties Based on the Fall 2001 Monitoring by the California Air Resources Board (PDF)
• September 2002 – Exposures to 1,3-Dichloropropene in Kern County Based on the Summer 2001 Monitoring by the California Air Resources Board (PDF)
• September 2002 – Exposures to 1,3-Dichloropropene in Kern County Based on the Summer 2000 Monitoring by the California Air Resources Board (PDF)
• August 2002 – Exposures to 1,3-Dichloropropene in Kern County Based on the Summer 2000 Monitoring by the California Air Resources Board (PDF)
• August 2002 – Annual Average Concentrations of 1,3-Dichloropropene Based on Monthly Use and Air Monitoring by the California Air Resources Board: Monterey/Santa Cruz and Kern Counties, 2000 And 2001 (PDF)
• August 2002 – Comments on Dow AgroSciences Memorandum Comparing Modeled and Measured 1,3-Dichloropropene Air Concentrations in Kern County (Data Package ID# 195675-E) (PDF)
• July 2002 – Exposures to 1,3-Dichloropropene in Kern County Based on the Fall 2001 Monitoring by the California Air Resources Board (PDF)
• June 2002 – Final Report for the 2001 Methyl Bromide and 1,3-Dichloropropene Air Monitoring in Kern County - Summer 2001
  • Appendices, Corrections
• June 2002 – Ambient Air Monitoring for Methyl Bromide and 1,3-Dichloropropene in Kern County – Summer 2001
  • Appendices
• June 2002 – Review of U.S. EPA Bystander Risk Estimates for a Proposed Buffer Zone Reduction for Telone Products (PDF)
• April 2002 – Exposures to 1,3-Dichloropropene in Monterey and Santa Cruz Counties Based on the Fall 2000 Monitoring by the California Air Resources Board (PDF)
• April 2002 – Exposures to 1,3-Dichloropropene in Monterey and Santa Cruz Counties Based on the Fall 2001 Monitoring by the California Air Resources Board (PDF)
• March 2002 – Final Report for the 2001 Methyl Bromide and 1,3-Dichloropropene Air Monitoring in Monterey and Santa Cruz Counties
  • Appendices
• March 2002 – Rotational Frequency of Fumigation of Fields Used for Annual Crops, Merced County, 1995-1999 (PDF)
• January 2001 – Comparison of the Final ARB Air Monitoring Results for 1,3-Dichloropropene to the Air Levels in RCD (Assignment # 01-0003) (PDF)
• January 2001 – Ambient Air Monitoring for Methyl Bromide and 1,3-Dichloropropene in Monterey and Santa Cruz Counties - Fall 2000
• December 2000 – Ambient Air Monitoring for Methyl Bromide and 1,3-Dichloropropene in Kern County - Summer 2000
  • Corrections
• November 2000 – Acute Exposure Values for Tree and Vine Applications of 1,3-Dichloropropene with Reduced Buffer Zone (PDF)
• October 1999 – Effect of Changes to the Distribution of Ambient Air Concentrations on the Distribution of Lifetime Exposures to 1,3-Dichloropropene (PDF)
• October 1997 – Report for 1996 Ambient Monitoring of Telone in Kern County
• November 1996 – Ambient Air Monitoring in Kern County for Telone (1,3-Dichloropropene) During DowElanco's Commercial Reintroduction, May- December, 1995
• November 1995 – Ambient Air Monitoring in Merced County for Telone (1-3-Dichloroproprene) During DowElanco's Commercial Reintroduction, March-April, 1995
• January 1994 – Ambient Air Monitoring in Monterey County for Telone II during DowElanco's Commercial Use Project, September and October, 1993
• April 1991 – 1,3-Dichloropropene Ambient Air Monitoring Data in Merced County, 1990
• August 1990 – Biological Monitoring of Dichloropropene: Air Concentrations, Urinary Metabolite, and Renal Enzyme Excretion (PDF)
• May 1988 – Pilot Study for Biological Monitoring of 1,3-Dichloropropene (In: Biological Monitoring for Pesticide Exposure, ACS Series 382: 215-230, 1989) (PDF)
• September 1987 – Exposure of Agricultural Employees to Increased Application Rates of 1,3-Dichloropropene in the Imperial Valley, 1986 (PDF)
• August 1987 – Biological Monitoring of 1,3-Dichloropropene (PDF)
• February 1985 – Air Exposure Monitoring of EHAP Personnel during a Telone II Soil Translocation Study in Fresno County (PDF)
• September 1984 – Exposure of Agricultural Employees to 1,2-Dichloropropane and 1,3-Dichloropropene (Telone & DD) in California, 1983 (PDF)
• May 1982 – A Study of Well Water in Selected California Communities for Residues of 1,3-dichloropropene, Chloroallyl Alcohol and 49 Organophosphate or Chlorinated Hydrocarbon Pesticides (PDF)
• January 1982 – Monitoring of Telone II during and Following Experimental Application by Shank Injection to Established Trees and Grapevines in California in 1980 and 1981 (PDF)
• July 1981 – A Study of Groundwater Sampled from Selected Areas in California in 1981 for Cis- and Trans-Chloroallyl Alcohols, the Primary Degradation Products of 1,3-Dichloropropene (Telone II) (PDF)
• June 1981 – Analysis of Water from Wells in Selected California Communities for Residues of 1,3-Dichloropropene, 27 Organophosphates, and 23 Chlorinated Hydrocarbons Used as Pesticides (PDF)
• February 1980 – Studies Concerning the Field Applications of Telone and DD in California in 1979 and the Ambient Air Concentrations of These Pesticides During and Following Application by Shank Injection into Soil in Fields (PDF)
• May 1978 – Occupational Illnesses and Injuries Due to Pesticides Containing 1,3-Dichloropropene as Reported by Physicians in California in 1976 and 1977 (PDF)
• May 1976 – Occupational Health Hazards of Exposure to 1,3-Dichloropropene (PDF)

RMDs identify pesticide exposures that require mitigation in order to further protect human health.

• March 2024 – Risk Management Directive for Occupational Bystander Cancer Risk From 1,3-Dichloropropene (1,3-D) (PDF)
• March 2024 – Comments on the January 2, 2024, Draft Risk Management Directive for Occupational Bystander Cancer Risk From 1,3-Dichloropropene and Responses (PDF)
• October 2021 - Risk Management Directive and Mitigation Guidance for Acute, Non-Occupational Bystander Exposure (PDF)
  • October 2021 - Comments on the Draft Risk Management Directive and Responses (PDF)
• October 2016 – Risk Management Directive and Mitigation Guidance for Cancer Risk (PDF)
• October 2016 – Comments on the Draft Risk Management Directive for 1,3-Dichloropropene (1,3-D) and Responses (PDF)
• September 2016 – OEHHA Comments on DPR's Draft Risk Management Directive (PDF)

• June 2024 - Update to OEHHA's Health-Based Recommendations to Mitigate Cancer Risk of Occupational Bystander Exposure to 1,3-Dichloropropene (PDF)
• December 2023 - OEHHA's Health-Based Recommendations to Mitigate Cancer Risk of Occupational Bystander Exposure to 1,3-Dichloropropene (PDF)
• December 2023 - Attachment to OEHHA Memorandum: "Health-Based Recommendations to Mitigate Cancer Risk of Occupational Bystander Exposure to 1,3-Dichloropropene" (PDF)
• December 2023 - DPR 22-005 Text of Final Regulations (PDF)
• November 2022 – Proposed Rulemaking for Health Risk Mitigation and Volatile Organic Compound Emission Reduction for 1,3-Dichloropropene
• January 2017 – Recommended Permit Conditions
• January 2017 – Oversight of Use Limits for 1,3-Dichloropropene Enforcement Letter (PDF)
• December 2016 – Memorandum of Understanding between Dow AgroSciences and DPR (PDF)
• October 2016 – Changes in the Management of 1,3-D and Frequently Asked Questions (PDF)
• October 2016 – Analysis of Agricultural Use and Average Concentrations of 1,3-Dichloropropene in Nine Communities of California in 2006 – 2015, and Calculation of a Use Limit (Township Cap) (PDF)
• February 2014 – Suspension of Exceptions to Township Limitations on Use
• February 2014 – Recommendation on Township Cap Exception Requests
• June 2013 – Recommended Permit Conditions
• January 2002 – California Management Plan: 1,3-Dichloropropene
• January 2002 – Dow AgroSciences Proposal for Refinement of 1,3-Dichloropropene Use in California Townships
  • DPR Response to Dow AgroSciences Proposal
• April 2001 – Managing 1,3-Dichloropropene (Telone) Chronic Risks (PDF)

Enforcement Letters

• January 2017 – ENF 2017-01 - Update to Volume 3, Restricted Materials and Permitting, Pesticide Use Enforcement Program Standards Compendium, 1,3-D Recommended Permit Conditions
• July 2016 – ENF 2016-20 - Update to Volume 3, Restricted Materials and Permitting, Pesticide Use Enforcement Program Standards Compendium, Correction to 1,3-D Recommended Permit Conditions
• September 2014 – ENF 2014-20 - Updates To Volume 3, Restricted Materials and Permitting, Pesticide Use Enforcement Program Standards Compendium: 1, 3-D Using Totally Impermeable Film for Strip Shank Applications
• May 2014 – ENF 2014-10 - Updates to Volume 3, Restricted Materials and Permitting: 1,3-Dichloropropene Pesticides (Field Fumigant) Recommended Permit Conditions
• July 2013 – ENF 2013-16 - Updates to Volume 3, Restricted Materials and Permitting: Chloropicrin and Chloropicrin With 1,3-Dichloropropene (Field Fumigant) Recommended Permit Conditions
• July 2013 – ENF 2013-15 - Updates to Volume 3, Restricted Materials and Permitting, Pesticide Use Enforcement Program Standards Compendium - 1,3-Dichloropropene Pesticides (Field Fumigant) Recommended Permit Conditions
• May 2013 – ENF 2013-06 - Volatile Organic Compound Emissions Reduction Methods Using Totally Impermeable Film (TIF) Tarpaulins
• April 2012 – ENF 2012-04 - Glove Requirement on Soil Fumigant Labels
• July 2008 – ENF 2008-21 - Volatile Organic Compounds (VOC) Field Fumigation Emission Reduction Regulations
• February 2008 – ENF 2008-002 (Amended) - Simultaneous Application of Pesticides with Conflicting Labeling Requirements
• January 2008 – ENF 2008-001 - Updates to Volume 3, Restricted Materials and Permitting, Pesticide Use Enforcement Program Standards Compendium
• September 2002 – ENF 2002-037 - Recommended Permit Conditions for Using 1,3-Dichloropropene Pesticides (Fumigant)
• December 2001 – ENF 2001-054 - Field Crop Site Designation on InLine® Soil Fungicide
• August 2001 – ENF 2001-040 - Suggested Permit Conditions for Using 1,3-Dichloropropene Pesticides (Fumigant) (PDF)
• June 2001 – ENF 2001-031 - Suggested Permit Conditions for Using 1,3-Dichloropropene Pesticides (Fumigant) (PDF)

• May 2024 - Pesticide Registration and Evaluation Committee Meeting Agenda (PDF)
  • Pesticide Registration and Evaluation Committee Meeting Minutes (PDF)
  • Presentation on 1,3-Dichloropropene Use Tracking Website Launch Overview
• March 2024 - Notice of Availability of Risk Management Directive for Occupational Bystander Cancer Risk of the Active Ingredient 1,3-Dichloropropene and Response to Comments (PDF)
• February 2024 - DPR’s 1,3-Dichloropropene Tarpaulin List (PDF)
• January 2024 - Regulations to Protect Non-Occupational Bystanders and Reduce Volatile Organic Compound Emissions
• November 2023 - DPR’s 1,3-Dichloropropene Tarpaulin List (Superseded February 2024) (PDF)
• September 2022 - Analysis of High Barrier Tarpaulin Cis-1,3-Dichloropropene Mass Transfer Coefficient Data Measured Under High Relative Humidity Conditions (PDF)
• January 2022 - Pesticide Registration and Evaluation Committee Meeting Agenda (PDF)
  • Pesticide Registration and Evaluation Committee Meeting Minutes (PDF)
  • Presentation on Air Monitoring of Workers During Loading and Application of Fumigants
• November 2021 – Pesticide Registration and Evaluation Committee Meeting Agenda (PDF)
  • Pesticide Registration and Evaluation Committee Meeting Minutes (PDF)
  • Presentation on Updates on the 1,3-Dichloropropene Mitigation Pilot Study
• October 2021 – Notice of Availability of Risk Management Directive for the Active Ingredient 1,3-Dichloropropene (PDF)
• March 2021 – Pesticide Registration and Evaluation Committee Meeting Agenda (PDF)
  • Pesticide Registration and Evaluation Committee Meeting Minutes (PDF)
  • Presentation on 1,3-D Pilot Project Update
• December 2020 – Pesticide Registration and Evaluation Committee Meeting Agenda (PDF)
  • Pesticide Registration and Evaluation Committee Meeting Minutes (PDF)
  • Presentation on 1,3-D Pilot Projects
• May 2020 – Pesticide Registration and Evaluation Committee Meeting Agenda (PDF)
  • Pesticide Registration and Evaluation Committee Meeting Minutes (PDF)
  • Presentation on 1,3-D Mitigation and Pilot Studies
• 2020 - Draft Mitigation Options for 1,3-Dichloropropene Pilot Program (PDF)
• 2019 - Public workshop on 1,3-dichloropropene (1,3-D) Oct. 17, 2019, Sacramento
  
  
  
• July 2018 – Pesticide Registration and Evaluation Committee Meeting Agenda (PDF)
  • Pesticide Registration and Evaluation Committee Meeting Minutes (PDF)
  • Presentation on the Development of Regulations for 1,3-Dichloropropene
• 2016 – 1,3-Dichloropropene: Hazard Identification and Risk Assessment for Occupational and Bystander Inhalation Exposure (PDF)
  • Poster (PDF)
• 2016 – Oncogenic Potency and Risk to Workers and the General Public from Inhaled 1,3-Dichloropropene (PDF)
  • Poster (PDF)
• November 2016 – Pesticide Registration and Evaluation Committee Meeting Agenda (PDF)
  • Pesticide Registration and Evaluation Committee Meeting Minutes (PDF)
  • Presentation on 1,3-Dichloropropene Mitigation
• December 2015 – Completion of Human Health Risk Assessment for the Active Ingredient 1,3-Dichloropropene (PDF)
• March 2014 – Pesticide Registration and Evaluation Committee Meeting Agenda (PDF)
  • Pesticide Registration and Evaluation Committee Meeting Minutes (PDF)
  • Presentation on 1,3-Dichloropropene Update (PDF)
• July 2009 – Bystander Exposure Assessment for the Pesticide 1,3-Dichloropropene (PDF)
• November 2008 – 1,3-Dichloropropene (Telone): Protecting Bystander & Worker Health (PDF)

• Pesticide Product Database
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  • Environmental Fate Reviews
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• OEHHA Proposition 65 Information
• U.S. EPA Pesticide Chemical Search
• PubChem-Chemical Information