ATTACHMENT_9_Coos_Bay_and_Roseburg_No_Application_Buffer_Areas.docx

DOCX document 34 KB Posted

Attached to
Roadside Herbicide Spot Spray Federal contract opportunity
Solicitation number
140L4323Q0198
Issued by
Department of the Interior Bureau of Land Management Oregon-Washington

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This document outlines no-application buffer areas and widths for herbicides used under a federal contract opportunity for roadside herbicide spot spraying. The table specifies buffer widths in feet for various herbicide applications near streams, wetlands, and ditches, with wider buffers required for perennial waters and those containing flowing or standing water. Applications will observe the most conservative buffer width for any herbicide in a combination. The related federal contract opportunity is a solicitation from the Bureau of Land Management Oregon-Washington seeking offers for roadside herbicide spot spraying services.

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ATTACHMENT 9_COOS BAY AND ROSEBURG NO APPLICATION BUFFER AREAS

Herbicide buffer distances – The following no-application buffers— which are measured in feet and are based on herbicide formula, stream type, and application method—will be observed during herbicide applications (Table 1). Herbicide applications based on a combination of approved herbicides will use the most conservative buffer for any herbicide included. Buffer widths are measured as map distance perpendicular to the bankfull for streams, the upland boundary for wetlands, or the upper bank for roadside ditches.

Table 1. No-application buffer widths1 in feet for herbicide application, by stream types and application methods.

Herbicide

Perennial Streams and Wetlands, and Intermittent Streams and Roadside Ditches with flowing or standing water present
Dry Intermittent Streams, Dry Intermittent Wetlands, Dry Roadside Ditches

Broadcast Spraying Spot Spraying

Hand Selective
Broadcast

Spraying Spot Spraying Hand Selective

Labeled for Aquatic Use

Aquatic Glyphosate
100
waterline
waterline
50
0
0
Aquatic Imazapyr
100
waterline
waterline
50
0
0
Aquatic Triclopyr-TEA
Not Allowed
15
waterline
Not Allowed
0
0
Aquatic 2,4-D (amine)
100
waterline
waterline
50
0
0

Low Risk to Aquatic Organisms

Aminopyralid
100
waterline
waterline
50
0
0
Dicamba
100
15
15
50
0
0
Dicamba + diflufenzopyr
100
15
15
50
0
0
Imazapic
100
15
bankfull elevation
50
0
0
Clopyralid
100
15
bankfull elevation
50
0
0
Metsulfuron methyl
100
15
bankfull elevation
50
0
0

Moderate Risk to Aquatic Organisms

Imazapyr
100
50
bankfull elevation
50
15
bankfull elevation
Sulfometuron-methyl
100
50
5
50
15
bankfull elevation
Chlorsulfuron
100
50
bankfull elevation
50
15
bankfull elevation

High Risk to Aquatic Organisms

Triclopyr-BEE
Not Allowed
150
150
Not Allowed
150
150
Picloram
100
50
50
100
50
50
Sethoxydim1
100
50
50
100
50
50
2,4-D (ester)
100
50
50
100
50
50

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