Very troubling findings in a recent research on pesticides found in Sand Lance which are fish eaten by many higher level predators. Please do not use pesticide sprays like this for carpenter ants and other insects. You likely are poisoning yourself and the environment.
An intriguing sidelight of the Kwiaht study is a finding that sand lances collected closest to Admiralty Inlet, the entrance to Puget Sound, were on average twice as contaminated with pyrethroid pesticides as sand lances collected on the north side of San Juan County closest to the Fraser River plume.
https://www.sanjuanjournal.com/news/over-the-counter-pesticides-found-in-islands-forage-fish/