A06_Detailed_Specifications.docx

DETAILED SPECIFICATIONS

HERBICIDE APPLICATION

2022 Owyhee Desert Herbicide Weed Treatment

1. Target Species: Hoary cress, and Scotch thistle Additional noxious weed species found within the designated contract boundary, and susceptible to chemical intended for use, will also be treated.

2. Treatment Area: 972 acres including up to approximately 67 acres of streams and reservoirs have the potential for water present and will require the use of both aquatic herbicide and adjuvant. Treatment areas vary in the amount of noxious weeds that are within the polygon. Actual weed treatments will be less than that of the treatment area itself.

3. Location of Work Site: Project area is located approximately 45 miles East of Paradise Valley. The Legal Description for the treatment area is: T44N R45E, T43N R45E, T42N R45E, T42N R46E, T43N R46E, T42N R47E, T42N R48E, T41N R48E, T41N R49E, T42N R49E, T43N R49E, T43N R50E, T44N R49E, T44N R48E. See Attached Location Maps.

Access to Work Site: Public or private access roads damaged by the Contractor shall be restored, at the Contractor’s expense, to the same condition they were in at the commencement of work.

4. Approximate Performance Period: Period of performance is estimated and timing of treatments will need to be flexible in order to maximize the effects on target weed species. The anticipated treatment window for this project is May 16 to June 16 and the Contractor must be available during that time period.

5. Requirements of Equipment to be supplied by the Contractor: Sufficient to meet specifications of the contract.

6. Loading Facilities: Use of any loading area on federal or private land, shall be arranged by and at the discretion and risk of the contractor.

7. Work Crew Requirements: Work crew for handling and mixing of chemical and loading equipment shall be furnished by the Contractor.

8. Requirements of Chemical to be supplied by the Contractor: Herbicide, surfactant, and dye shall be used and selected from the attached lists of Approved Herbicide Formulations and Approved Adjuvants for use on BLM land. Colorant/dye must be visible for 3 days after application.

10. Rate of Application:

· Terrestrial Tank Mix: 2,4-D (Alligare 2,4-D or equivalent) 64 ounces/acre (1.9 lb ae/acre) + surfactant (Rate as specified on label and compatible with herbicide) + Dye.

· Aquatic Mix: Aquatically approved 2,4-D (Alligare 2,4-D or equivalent) at 64 ounces/acre (1.9 lb ae/acre) + Aquatically approved surfactant (Rate as specified on label and compatible with herbicide) + Dye.

Quote must include both tank mixes.

11. Remarks and Other Requirements: Apply the spray solution in properly maintained and calibrated equipment capable of delivering the desired volume. Controlling drift is the responsibility of the Applicator. If there is potential for harm to non-target native species due to broadcast spraying certain areas the contractor MUST spot spray the target species in those given areas.

The Owyhee Desert herbicide weed treatment area consists predominately of roadside application with the exception of an approximately 200-acre area in Northeastern portion of the contract. To the best of the Government’s knowledge known access issues related to private landowner permissions or washed-out roads were avoided. However, the Government cannot guarantee additional issues may not arise due to previously undocumented or changing conditions (i.e. fire activity, previously unreported washouts, or overgrown roads) and access restrictions (i.e. locked gates). Even if access is limited, contractor is expected to travel these areas for treatment. Terrain varies from relatively flat 2-5% slope to rolling hills ranging from 10-20% slope. Soils are a shallow loam. Elevation ranges from 5000 to 5600 feet. Vegetation consists of dense patches of Wyoming big sagebrush, Thurber’s needlegrass, bluebunch wheatgrass, Sandberg’s bluegrass, Indian paintbrush, globemallow, and phlox. Other alkaline tolerant shrubs like rubber rabbitbrush, fourwing saltbush, and spiny hopsage can also be found in the plant community in small isolated patches.

For areas where water is present during the time of application, the buffers for non-aquatically formulated herbicides will be maintained at 10 feet for application by handgun and 25 feet for application with boom equipment. Spraying up to the water’s edge (within the buffer) will require use of aquatic formulated herbicide and surfactant.