Final Comprehensive Conservation Plan - U.S. Fish and Wildlife ...

Hakalau Forest National Wildlife Refuge
Comprehensive Conservation Plan
Lbs/acre EEC (ppb)
5.00 1839
6.00 2207
7.00 2575
8.00 2943
9.00 3311
10.00 3678
7.2.1.2.2 Cropland/facilities maintenance treatments
Field drift studies conducted by the Spray Drift Task Force, which is a joint project of several
agricultural chemical businesses, were used to develop a generic spray drift database. From this
database, the AgDRIFT computer model was created to satisfy USEPA pesticide registration spray
drift data requirements and as a scientific basis to evaluate off-target movement of pesticides from
particle drift and assess potential effects of exposure to wildlife. Several versions of the computer
model have been developed (i.e., v2.01 through v2.10). The Spray Drift Task Force AgDRIFT®
model version 2.01 (SDTF 2003, AgDRIFT 2001) would be used to derive EECs resulting from drift
of pesticides to refuge aquatic resources from ground-based pesticide applications >25 feet from the
high water mark. The Spray Drift Task Force AgDRIFT model is publicly available at
http://www.agdrift.com. At this website, click “AgDRIFT 2.0” and then click “Download Now” and
follow the instructions to obtain the computer model.
The AgDRIFT model is composed of submodels called tiers. Tier I Ground submodel would be used
to assess ground-based applications of pesticides. Tier outputs (EECs) would be calculated with
AgDRIFT using the following input variables: max application rate (acid basis [see above]), low
boom (20 inches), fine to medium droplet size, EPA-defined wetland, and a
≥25-foot distance (buffer) from treated area to water. No croplands exist for Hakalau Forest NWR.
7.2.2 Use of information on effects of biological control agents, pesticides, degradates, and
adjuvants
NEPA documents regarding biological and other environmental effects of biological control agents,
pesticides, degradates, and adjuvants prepared by another federal agency, where the scope would be
relevant to evaluation of effects from pesticide uses on refuge lands, would be reviewed. Possible
source agencies for such NEPA documents would include the Bureau of Land Management, US
Forest Service, National Park Service, US Department of Agriculture-Animal and Plant Health
Inspection Service, and the military services. It might be appropriate to incorporate by reference
parts or all of existing document(s). Incorporating by reference (40 CFR 1502.21) is a technique
used to avoid redundancies in analysis. It also would reduce the bulk of a Service NEPA document,
which only would identify the documents that are incorporated by reference. In addition, relevant
portions would be summarized in the Service NEPA document to the extent necessary to provide the
decision maker and public with an understanding of relevance of the referenced material to the
current analysis.
In accordance with the requirements set forth in 43 CFR 46.135, the Service would specifically
incorporate through reference ecological risk assessments prepared by the US Forest Service
G-22 Appendix G. Integrated Pest Management