WEBSTER— The Webster Lake Association has asked the state Highway Department to fence off a short stretch of Route 193 along Webster Lake where tractor-trailer trucks sometimes park overnight.

“Trucks park overnight, the drivers leave them running, and oil and gas spills occur,” said Paul LaFramboise, chairman of the association’s environmental committee. “We don’t want to see the large tractor-trailers parking in areas where leaks would go into the lake.”

Mr. LaFramboise said a truck that parked in the area two weeks ago left behind a tire and a small diesel fuel spill.

“It’s been a constant problem,” he said.

Although the spills have been minor and have not required cleanup, the potential exists for serious problems, he said.

“If nothing is done, the next time a truck might spill a chemical load or its entire fuel tank,” Mr. LaFramboise said.

The slender gravel patch along Route 193 (Thompson Road) is just south of the Interstate 395 on- and off-ramps at the Union Point area of the lake. A fence would block trucks from parking just off the asphalt, but still would allow access by Nipmuc Water Ski Club members to the club’s property on the lake, according to Mr. LaFramboise.

State Rep. Paul J. Kujawski, D-Webster, said yesterday he has contacted the state Highway Department in support of the association’s request.

Mr. Kujawski, who has gotten state money for an ongoing sediment control project at the lake, said the state recently fenced off another portion of Route 193 at the I-395 overpass as part of the control project to prevent trucks from coming off the interstate and parking there.

Mr. LaFramboise also is chairman of the Planning Board, which sponsored a bylaw that voters approved at this year’s annual town meeting to create a new Lake Watershed Protection District.

Under the sediment control project, detention ponds areas are being built at eight storm water drainage points around the lake. Work was done first at Union Point, which was considered the most significant of 40 places where storm water drains directly into the lake.