At its meeting on Tuesday, the City Council will continue a public hearing into a special permit request from American Tower to erect a 160-foot cell tower on its property at 10 Presidential Way. According to city clerk William Campbell, the firm has about 30,000 telecommunications towers and other properties around the country that it manages from its Woburn site, where it has about 500 employees. He said the proposed tower would be used as a training facility and for American Tower’s own data transmission. He said the firm also plans to lease space on the tower for other firms to place their antennas and to provide rent-free space for Woburn’s public safety departments for their antennas. Also at Tuesday’s meeting, the council will hold a public hearing on a special permit request by the Herb Chambers company to use a portion of the Unicorn Office Park, off Interstate 93, as a storage parking area for its auto dealerships, according to Campbell. The meeting will be held at 7 p.m. in City Hall.