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...**~** MEMORANDUM UN I TED STATES ENVIRONMEN TAL P ROTE CTIO N AGENCY WASHINGTON, O.C. 20460

Date: March 17, 20 1 5 OFFI CE OF CHE MIC AL S AFETY AND POLLU TIO N PREVEN TION

Subject: Sethoxydim. Tolerance Revision made for t h e Section 3 Registration of the Herbicide Sethoxydim on Grass Grown for Seed; Request for an Amended Use on Blueberry ; and Proposed Crop Group Conversion s . Update to Summary of Analytical Chemistry and Residue Data. PC Code: 12 1001 DP Barcode : 0425783 Decision No . : 487076 Registration No.: 7969

- 56 & 7969-58 Petition No.: 4 £ 8239 Regulatory Action: Section 3 Reg is tration Risk Assessment Type: NA Case No.: 2 600 TXRNo.: NA CAS No.: 740 5 1-80-2 MRID Nos.: 4 92 57702 40 CFR: § 18 0 .41 2 FROM:

THROUGH:

TO: Peter Savoia, Chemis Q

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# .,,.L -z.,,-Y- 1:.tl-___ / Risk Asses sment Branch (RAB) V Health Effect s Di v ision (7509P ) Michael S. Metzger, Branch

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# f'b Health Effect s Division (7509 ) Sidney Jacks on/Barbara Madden , RM 05 Minor Use and Emergency R esponse Branch Registration Di v ision (7505P) And Ronnie J. Bever , Risk Assessor Risk Assessme nt Branch (RAB) 

### VII Health Eff ects Division (7509P) A residue chemistry summary memo for the new use request of sethoxydim in/on a variety of crops was recently completed (D422744, P. Savoia, 12 / 18/ 2014). In the process of preparing the risk assessment for this action, the need for an update to the residue chemistry summary memo was identified . Accordingly , th e following sections replaces the corre sponding sections of the D ecember 18 , 2014 memorandum .

Page 1of3Sethoxydim Summary of Analytical Chemistry and Residue Data DP No. D425783 

### 2.0 Regulatory Recommendations Pending submission of a revised Section F and a revised Sectio n B to reflect the request tolerance revision, there are no residue chemistry cons iderations th at would preclude retaining the established strawberry tolerance in lieu of conversion to fruit, low growing b erry , s ubgroup I 3

- 07G: Strawberry ................................................ . ........ .. .. . ............ 10 ppm For the requested rapeseed subg roup 20A and sunflower subgroup 20B crop group conversions, each raw agricultural commodity (RAC) could b e potentially processed in to meal. Fo llowing the established meal tolerance of the representative crop , canola meal at 40 ppm for subgroup 20A and sunflower meal at 20 ppm for subgro up 208 , tole rances for the residues of sethoxyd im are also required for translation to the following commoditie s: Calendula, meal ..................................................................20 ppm Castor oil plant , meal ...................... . .................. .. ..............20 ppm Chinese tallowtree, meal .. . ................................. . ............... 20 ppm Cuphea, meal. ......... .. .. .. .................. . .................. . ............... .40 ppm Echium, meal ............ ... ..................................... ... ..............40 ppm Euphoriba, meal ......................................................... . ....... 20 ppm Evening primrose, meal ................ .. ................. ..... ....... . ..... 20 ppm Flax , meal ........................................................................... 40 ppm Hare's ear mu stard , meal ........................... : .... ....... ........... .40 ppm Jojoba, meal ................................................................. . ..... 20 ppm Lesquerella , meal ...................... .. ..................... . ................. 40 ppm Lunaria, meal ........... ...... .............. .. . .. .................................40 ppm Meadowfoam, meal. ...................... ... .................. ...... ..........40 ppm Milkweed, meal ....................... .. .. .......... ...... .. . ......... ......... . .40 ppm Mustard , meal ......... ...... .....................................................40 ppm N i ger seed, meal ............................................................ . .... 20 ppm Oil radish, meal.. ....... .. .................. .. .................................. .40 ppm Poppy seed, meal ............................................. .. . .. ............ .40 ppm Rose hip, meal ........ ......... .............. .. ................................... 20 ppm Sesame, meal. .....................................................................40 ppm Stokes aster, meal. .... ...... ....................................................20 ppm Sweet rocket culti vars, meal ............................................. .40 ppm Tallowwood .......................................................................20 ppm Tea o il plant, meal.. ..................... .. ..................... . ...............20 ppm Vernonia, meal ....... ...... ....... . .......... .. .................................. 20 ppm

Page 2of3Sethoxydim Summary of Analytical Chemistry and Residue Data DP No. 0 425783 2.2.2 Recommended Tolerances The tolerance express i ons spec ifi ed for sethoxydim have been reviewed and should be updated as fo llo ws based on HED's Interim Guidance on To le rance Express ions (S. Knizner, 05/27/2009). (a) General. To lerances are established for the herbicide set h oxy dim , including its metabolites and degradates , in or on the commodities in the table below. Complian ce wi th the to lera n ce levels specified below is to be determined by measuring only the sum of the herbicide 2-[ 1

- (ethoxyimino)b utyl ]- 5 -[ 2-(ethylthio )propy l]- 3-hydroxy -2- cyclohexen-1- one (CAS Reg. No. 74051-80 -2) and its m etabo lites containing the 2-cyc lohexen-1 -one moiety , ca lculated as the stoichiometric equivalent of sethoxydim, in or on the commodity. (c) Tolerances with regional registration. Tolerances with regional registration are esta bli shed, as defined in 

### § 180. l (l), for the herbicide sethoxydim, includin g its metab o lites and degradates, in or on the commoditi es in the table be low . Compliance with the tolerance leve ls specified below i s to be determined by measuring only the sum of the herbicide 2-[ 1- (ethoxyimino)butyl]-5-[2-( ethylthio)propyl]-3-hydroxy -2- cyclohexen

- l-one (CAS Reg. No. 74051-80-2) a nd its metabolites containing the 2-cyclohexen

- 1 -one moiety , calc ulated as the s toichiometric equivalent of sethoxydim, in or on the commodity.

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