Shorty, call your closest weather reporting station and get the winds for the time period before and after they sprayed. ALL chemicals for Ag use have Labeled max wind for application-seldom do the applicators follow that to a T but they should have NEVER sprayed upwind of your pond anyway-that's your way out if needed.
Max wind for application is 5 mph, the Lincoln Airport history had a recorded wind speed of 9 mph at 6:54 am and had climbed to 14 mph by 10:54 AM. The Company said they started spraying the 180 acres around our place at 7am. The Lincoln Airport is 15 miles straight south of us.
We also had a record high that day, it was sunny and 85 degrees by 11:54 am. One of my coworkers who used to farm said that with the sun and wind the spray may have "atomized" and been carried by the wind as it was drying. The smell was really bad when I got home, it still smelled bad when the NEDQ was out here sampling and taking DO measurements.
