UNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASH IN GTON D

.C ., 20460 

### MAR 28 2016
OFFICE OF CHEMICAL SAFETY AND POLLUTION PREVENTION

MEMORANDUM SUBJECT: FROM:

THRU:

TO: Characterization of Propoxur Spot Treatments 

### Jonathan Becker Ph

.D. , Senior Science Advisor 

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# /3~ Biological Analysis Branch 

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Stephen Smearman, Economist**~** _**-/u..,~** Economic Analysis Branch 

## r'f'· Biolog ical and Economic Analys is 7503P) Cowell Cook, Acting Chief Biological Analysis Branch 

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Timothy Kiely , Chief

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# A~ Economic Analysis Branch vv\.t

. Biological and Economic Analysi ivision (750 Brittany Pruitt, Chemical Review Manager Kelly Sherman, Chief Risk Management and Implementation Branch III (RMIB Ill) Pesticide Re-Evaluation Division (7508P) Gabe Rothman, Environmental Scientist Hannah Yingling, Biologist Environmental Risk Branch 5 Environmental Fate and Effects Division (7507P)

PRODUCT REVIEW PANEL: 23 March2016

IThis memo estimates the amount of propoxur used in an outdoor spot treatment application and describes available information on the annual amount of propoxur used. This information will be used to help characterize the ecological risk assessment and will inform the risk management decision for this chemical. Amount ofpropoxur used for an outdoor spot treatment. Propoxur, a residual carbamate insecticide, can be used to treat small areas around structures. There are two types ofproducts labeled for this use - ready-to-use formulations (EPA Reg. No. 84396-I 2 and EPA Reg. No. 62I8-24) intended to be used in an undiluted form and concentrates (EPA Reg No. 86244-1) used to prepare small volumes of spray which are t hen applied using hand-held equipment. In all cases the finished spray is applied as a I or I. I percent solution. The Agency considers spot treatments to cover an area no larger than 1,000 square feet 1 • The volume of spray needed to treat this size ofarea varies depending on the application method used and the pest being controlled. For propoxur used to treat small areas around structures, B EAD estimates that this would require about one gallon of finished spray solution based on best professional judgement. The amount of active ingredient contained in one gallon of spray is calculated by multiplying the amount of product needed to produce I gallon of finished spray by the amount of active ingredient in a gallon of formulated product using any necessary unit conversion factors. In the case ofpropoxur, 0.094 pounds would be required to prepare one gallon of spray (using EPA Reg. No. 86244-I). 8 

### oz product 1 

### gal 1.5 

### lbs a. i. 0.9375 

### lbs a. i. 

### -------x x = ------- 

### gal finish solution 128 

### oz gal product galfinish solution Annual usage ofpropoxur. Nationally, the amount ofpropoxur used is small. Pesticide use reporting data from California indicate that about 200

- 300 pounds are used annually. 2 BEAD does not have current usage information for propoxur at a national level. The most recent summary is from 2009 , but was based on data from 200I

- 2003. 3 At that time, the amount of propoxur used in the professional management sector was estimated to be 8,000 to 9 ,000 pounds per year. Over the last decade there have been several insecticides registered for use on these sites. Additionally, the number ofregistered use sites for propoxur have been greatly reduced.

1 EPA, 2012. Standard Operating Procedures for Residential Pesticide Exposure Assessment. Office of Pesticide Programs, Office of Chemical Safety and Pollution Prevention, U.S. Environmental Protection Agency 2 CALDPR, 2014. Pesticide Use Reporting (PUR). California Department of Pesticide Regulation. Available at http :// www .cdpr.ca.gov/docs/pur/ purmain.htm 3 EPA, 2009. · Use and Usage Information/or Propoxur. Memo from A. Chiri and K. Stebbins , Biological and Economic Analysis Division to M. Wait and M. Goodis , Pesticide Re-evaluation Division, Office of Pesticide Programs, U.S. Environmental Protection Agency. 2Based on this , BEAD would expect that the amount of propoxur currently used nationally would be substantially less than the 200 1 and 2003 estimates.

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