For citizens who might have spotted city trucks on the locally beloved biking path last week, there’s nothing to fear — Kirkland was simply working to control dust on the Cross Kirkland Corridor.

The former rail line, which stretches through the heart of the city from Totem Lake to the South Kirkland Park & Ride, was reworked as a biking and walking path beginning in summer 2013.

Much of the trail is gravel, making dry conditions a problem throughout the summer months.

The city used a calcium chloride product called Boost, which is produced from natural, renewable resources, to keep dust to the minimum. According to a city release, Boost is also used to de-ice city roads in the winter, and is essentially salt and water — completely harmless to humans.