UNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHINGTON, 

### D
.C
. 20460 OFFICE OF CHEMICAL SAFETY AND POLLUTION PREVENTION

MEMORANDUM Date : · April29, 2014 SUBJECT: Bispyribac-sodium: Tier I Review ofHuman Incidents PC Code: 078906 DP Barcode: 0419813 Decision No.: 487556 Petition No.: NA Registration No.: NA Regulatory Action: NA Case No.: NA Risk Assessment Type: NA TXR No.: NA CAS No.: 125401-92

-5 40CFR: NA MRID No.: NA 

### FROM : Elizabeth Evans, Environmental Protection Specialist 

# D Toxicology and Epidemiology Branch 

# CtJ.**~** Health Effects Division (7509P) 

# J and Shanna Recore, Industrial Hygienist ()
. "
. n Toxicology and Epidemiology Branch

### ~ Health Effect Division (7509P) THROUGH: David Miller, Acting Branch Chie4 J 

# Jttf_ ;<fdff, 'UJ ' 

### Cj Toxicology and Epidemiology Branch Health Effects Division (7509P) TO: Kelly Lowe, Risk Assessor Risk Assessment Branch I Health Effects Division (7509P) and Moana Appleyard, Chemical Review Manager Risk Management & Implementation Branch 5 Pesticide Re-evaluation Division (7508P) Summary and Conclusions There does not appear to be a concern at this time that would warrant further investiga tion, since there were no incidents involving bispyribac-sodium reported to either IDS or SENSORPesticides. The Agency will continue to monitor the incident information and if a concern is triggered, additional analysis will be included in the risk assessment.
Page 1 of4Detailed Review 

### I. ACTION REQUESTED This review is intended to fulfill our requirement to docket summaries of incident data that were reported to the Agency, as well as to ensure human incident data and the Agricultural Health Study (AHS) are part ofthe problem formulation phase of registration review. Reports of adverse health effects allegedly due to a specific pesticide exposure (i.e., an "incident") are largely self-reported and therefore, generally speaking, neither exposure to a pesticide or reported symptom (or the connection between the two) is validated or otherwise confirmed. Typica lly, causation cannot be determined based on incident data. However, incident information can be an important source offeedback to the Agency: incidents of severe outcome, or a suggested pattern or trend among less severe incidents, can signal the Agency to further investigate a particular chemical or product. Observational epidemiology studies relate the risk ofdisease, 

### e.g., cancer, and exposure to an agent such as a pesticide product in the general population or specific sub

-groups like pesticide applicators
. 

### II. BACKGROUND Bispyribac sodium was conditionally registered with the EPA for aquatic use in 2011
. The active ingredient is sodium 2,6-bis[( 4,6

-dimethoxypyrimidin

-2-yl)oxy]benzoate. TradewindTM are the formulations registered for use in aquatic systems. It is used for large-scale or whole water body control of submerged, emergent and floating- leafvegetation
. 1 For this evaluation, both the OPP Incident Data System (IDS) and the Centers for Disease Control and Prevention/National Institute for Occupationa l Safety and Health (CDC/NIOSH) Sentinel Event Notification System for Occupational Risk-Pesticides (SENSOR) databases were consulted for pesticide incident data on the active ingredient bispyribac-sodium (pc code: 078906). The purpose ofthe database search is to identify potential patterns in the frequency and severity of the health effects attributed to bispyribac

- sodium exposure . Bispyribac-sodium is not included in the AHS, and therefore this study does not provide information for this report. 

### III. RESULTS/DISCUSSION
a. IDS (Incident Data System) OPP's ID S includes reports of alleged human health incidents from various sources, including mandatory Federa l Insecticide, Fungicide and Rodenticide Act (FIFRA) Section 6(a)(2) reports from registrants, other federal and state health and environmental agencies, and individual consumers. Since 1992, OPP has compiled these reports in IDS. IDS contains reports from across the U.S. and most incidents have all relevant product information recorded. Reports submitted to the IDS represent anecdotal reports or allegations only, unless otherwise stated in the report. IDS records incidents in one oftwo modules: Main IDS and Aggregate IDS:

1 http: //dnr.wi.gov/lakes /plants/factsheets/8 ispyribacSodiumfactsheet.pdf Page 2 of4o Main IDS contains incidents resulting in higher severity outcomes and provides more detail with regard to case specifics. This system stores incident data for death, major and moderate incidents, and it includes information about the location, date and nature ofthe incident. Main IDS incidents involving only one active ingredient (as opposed to pesticide products with multiple active ingredients) are considered to provide more certain information about the potential effects ofexposure from the pesticide.
o Aggregate IDS contains incidents resulting in less severe human incidents (minor, unknown, or no effects outcomes). These are reported by registrants only as counts in what are aggregate summaries. For the Main IDS, from January 1, 2009 to January 15,2014, there were 0 incidents reported involving bispyribac-sodium in the database. In Aggregate IDS, from January 1, 2009 to January 15, 2014, there were 0 reported incident involving bispyribac-sodium in the database.


### b. SENSOR-Pesticides The SENSOR-Pesticides database covers 11 states from 1998-2010, although reporting varies from state to state. Cases ofpesticide-related illnesses are ascertained from a variety of sources, including: reports from local Poison Control Centers, state Department of Labor workers' compensation claims when reported by physicians, reports from State Departments of Agriculture, and physician reports to state Departments ofHealth. Although both occupational and non-occupationa l incidents are included in the database, SENSOR-Pesticides focuses on occupational pesticide incidents, and is ofparticular value in providing that information. The state coordinator at each ofthe 11 respective state Departments of Health conducts case followup activities such as obtaining medical records to verify symptoms and severity. Using standardized protocol and case definitions derived from poison center reporting, the state SENSOR-Pesticide coordinator enters the incident information into the state-based system which is sent to NIOSH annually to be aggregated. A query of SENSOR-Pesticides 1998-2010 identifies no cases involving bispyribac

-sodium (pc code 078906).


### c. Agricultural Health Study (AHS) The AHS is a high quality, prospective epidemiology study evaluating the link between pesticide use and various health outcomes including cancer. The AHS includes private and commercial pesticide applicators and their spouses. Ifthere are AHS findings relevant to a particular pesticide going through registration review, the Agency will ensure they are considered in the problem formulation/seeping phase ofthe process and, if appropriate, fully reviewed in the risk assessment phase ofthe process. The AHS includes information on use of 50 different pesticide active ingredients commonly used in agriculture
. Bispyribac-sodium is not included in the AHS, and therefore this study does not provide information for this report. Page 3 of4IV
. CONCLUSION There does not appear to be a concern at this time that would warrant further investigation, since there were no incidents involving bispyribac-sodium reported to either IDS or SENSOR

Pesticides. The Agency will continue to monitor the incident information and if a concern is triggered, additional analysis will be included in the risk assessment.

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