Silver Lake Waushara County, Wisconsin 2016 AIS Aquatic Pesticide Application Report

Transcription

1 Silver Lake Waushara County, Wisconsin 2016 AIS Aquatic Pesticide Application Report Initial Treatment Tracks 5/26/2016 Second Treatment Tracks 7/21/2016 Third Treatment Tracks 9/1/2016 Prepared By: Prepared For: Silver Lake Management District P.O. Box 302, Wautoma, WI October 2016

2 AQUATIC PESTICIDE APPLICATIONS: Clean Lakes, Inc. (CLI) was contracted by the Silver Lake Management District (SLMD) (the District) to perform aquatic pesticide (herbicide) applications to infestations of Eurasian Watermilfoil (EWM) and its hybrid (HWM) in the project areas outlined below, in compliance with the published Wisconsin Department of Natural Resources (WDNR) Aquatic Invasive Species (AIS) Treatment Protocols, the March 13, 2012 coverage under the Wisconsin Pollutant Discharge Elimination System (WPDES) General Permit for Aquatic Plant, Algae and Bacteria authorizing coverage for CLI, and the April 22, 2016 Wisconsin DNR Permit Approval issued to the District (included as part of the attached Aquatic Pesticide Application Plan (APAP)). The appropriate logs of the work performed, and map of the locations of AIS colonies treated are both included in this report. AQUATIC HERBICIDES USED: The aquatic herbicide used was SePRO s SonarOne pelletized fluridone, EPA Registration Number (Label and MSDS included as part of the attached Aquatic Pesticide Application Plan (APAP)). TREATMENT SCHEDULE: The aquatic pesticide applications were performed on Thursday, May 26 th, Thursday, July 21 st, and Thursday, September 1 st, EQUIPMENT USED: CLI s technologically advanced equipment included a 21 foot Carolina Skiff DLX with a Vortex gas powered spreader system coupled with a Lowrance HDS-9 for SonarOne (pelletized fluridone) herbicide applications. The aquatic vegetation treatment area shapefiles provided by Onterra were loaded into the on board computer systems for vessel guidance and herbicide 2 of 12

3 application data recording. The treatment tracks were automatically recorded via the vessel s GPS guidance system supported by web based GIS software for the production of the final treatment area maps to document the treatment areas included within this report. Digital data files were provided to Onterra per the transmittal of spatial data requirements outlined above, and are included in this report in the form of treatment maps. Completed APM herbicide treatment records were submitted to the WDNR, the District, and Onterra following each of the three treatment projects. CLI provided the required support equipment for material handling (unloading truck, loading boat) as well as support trucks for the vessels assigned to the project. The aquatic herbicides were delivered by Northwoods Distribution Services, Inc. of Rhinelander, WI in 20 pound pail containers and were transferred to CLI s application vessel. PERMIT COMPLIANCE: The District provided the required Permits and approvals for the herbicide treatments from the Wisconsin Department of Natural Resources as outlined and included in the attached APAP. CLI obtained coverage for aquatic plant control activities under the Statewide Wisconsin Pollutant Discharge Elimination System (WPDES) General Permit (#WI Clean Lakes, Inc. Statewide Treatments/FIN 46219) that provided authorization for the herbicide applications. Visual Check Record: Compliance with the WPDES permit requires a visual check be performed at a representative location during or soon after plant control activities. A visual check was carried out by Amy Kay, Andrew McNabb and Juraj Juricevic (Wisconsin Commercial Pesticide Applicators) at multiple representative locations within the treatment area during the applications. During and immediately following the herbicide applications no adverse conditions were observed. Adverse Incidents are defined as death or distress of non-target organisms, disruption of wildlife habitat, risk to recreational activities, risk to human health, etc. Pesticide Application Control: To ensure that CLI did not exceed the pesticide label maximum rate, licensed and certified applicators performed aquatic herbicide 3 of 12

4 applications. Application equipment was maintained and calibrated prior to the application to ensure effective pesticide application. Maintenance of herbicide application equipment ensured that no unintended discharges occurred. PUBLIC NOTIFICATION/POSTING PESTICIDE TREATMENT AREA WARNING SIGNS: The properties within and adjacent to treatment areas (entire lake), and public launching sites were posted with the approved WDNR Warning signs prior to treatment by CLI. There are no swimming, or fishing use restrictions, there is an irrigation precaution directing residents to not use the water until notified by the District. Herbicide concentration monitoring samples must come back with less than 5 parts per billion SonarOne (pelletized fluridone) prior to lifting the irrigation precaution. The Warning signs need to be posted until the water use restriction has expired and the District is responsible for removing and disposing of/recycling as appropriate. The District published all other notices per the treatment requirements. EQUIPMENT DECONTAMINATION PROCEDURES: Equipment decontamination measures were performed prior to entering Silver Lake and prior to exiting the boat launching site and moving CLI s vessel to another waterbody per the current decontamination procedures (Reference NR40). 4 of 12

5 Treatment Site Layout (Onterra, LLC.) 5 of 12

6 Initial Treatment Site Area Data & Herbicide Application Rate Provided by Onterra May 25, 2016 Initial Treatment Tracks 5/26/ of 12

7 Second Treatment Site Area Data & Herbicide Application Rate Provided by Onterra July 13, 2016 Second Treatment Tracks 7/21/ of 12

8 Third Treatment Site Area Data & Herbicide Application Rate Provided by Onterra August 25, 2016 Third Treatment Tracks 9/1/ of 12

9 Application strategy for each treatment was as directed and supported during treatment by the herbicide manufacturer (SePRO). For the first application in sites A-16, B-16, C-16 and D-16, paths were created around the outside of the shapefile (treatment area) and then filled in using waving motions throughout the plot. For treatment area E-16 a smooth quick couple of loop paths were made as the treatment area was small and a lesser amount was needed in this location. The same strategy occurred in the following two treatments, however less product was required and therefore less paths were required to apply product. SUBMERGED AQUATIC VEGETATION (SAV) MAPPING: A Lowrance HDS Digital Echosounder System with a Structure Scan Module was used to record data of the Submerged Aquatic Vegetation (SAV) profile in the control plots during the initial and final treatments. Data was collected in both the.slg (traditional sonar on HDS line) and the.sl2 (multi-channel structure scan) formats. The data collected was then uploaded to a data processing website for time of treatment processing of SAV data in the treatment plots. The SAV data collected (coverage, height in the water column, and bio-volume) was performed in order to support CLI s best management practices and the use of best available technologies as well as post-treatment efficacy evaluations. The map images generated from the initial treatment in May and the final treatment in September can be seen below. The full SAV reports are attached to this Aquatic Pesticide Application Report. 9 of 12

10 Silver Lake SAV Map Images 10 of 12

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12 Attachments: Silver Lake CIBioBase SAV Reports for May 26 th, and September 1 st, WDNR Aquatic Plant Management Herbicide Treatment Records for May 26 th, July 21 st, and September 1 st, Silver Lake, 2016 Aquatic Pesticide Application Plans (APAPs) that include: o Wisconsin DNR Approval Letter & Permit Application o Product Label and MSDS for SonarOne o Site Specific Safety Plans for the projects, May, July and September, 2016 END OF PESTICIDE APPLICATION REPORT (See Attachments) 12 of 12