Thats nowhere near enough for a crew of workers using leafblowers - which can be around 1 kw each. Weed wackers and lawnmowers are the same or more.
It is plenty for a crew of builders using impact drivers, drills, screwdrivers, nail guns, etc. though.
However, if the truck is electric, with a 100kWh battery, the 10-20 kWh used by the workers equipment during the day is a pretty small chunk of the total range.