The students at Guilford High School were dismissed early on Wednesday because of a small fuel truck rollover.
Students were dismissed from the building at 605 New England Rd. at around 1 p.m.
The school superintendent said the students were dismissed "mainly due to logistics" because the high school is new and still undergoing some construction in the parking area and sports fields.
The fuel truck was helping with the construction was driving on a paved road and making its way onto a smaller road when it tipped over, the superintendent said.
Wreckers and fire trucks were needed to get the truck upright.
The superintendent said it was going to take up a lot of space and impact the school bus pickup area, so the students were dismissed early so it wouldn't impact dismissal for the middle and elementary schools.
Department of Energy & Environmental Protection said the truck belongs to Taylor Oil Co. of New England and it was carrying 1,700 gallons of fuel oil in the cargo tank and 25 gallons of diesel in the saddle tank.
Less than 10 gallons of fuel spilled from the cargo tank.
Officials said the leak is very slow, coming from the dome covers and there is containment around the truck to catch the fuel.
McVac was hired to evacuate the tanks and remediate the soil.
No injuries were reported. School will resume as normal on Thursday.
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