Attachment_11__No-application_buffer_widths.docx

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Noxious and Invasive Plant Treatment Services
Solicitation number
140L4324Q0005
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This document contains guidelines for herbicide application buffer widths to protect waterways and wetlands. It provides a table specifying no-application buffer widths in feet for various herbicide types based on the stream or wetland type and application method. Buffers range from waterline to 150 feet depending on the herbicide's risk level to aquatic organisms, with higher risk herbicides requiring wider buffers. The related federal contract opportunity is for Noxious and Invasive Plant Treatment Services on an Indefinite Delivery/Indefinite Quantity (IDIQ) basis with the Department of the Interior Bureau of Land Management offices in Oregon and Washington. The solicitation seeks a contractor to perform noxious and invasive plant treatments, following the buffer guidelines in the table, to control unwanted vegetation on public lands.

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Integrated Invasive Plant Management for the Coos Bay District Environmental Assessment Appendix A – Protection Measures

pp. 222-23 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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