Close margins marked last weekend’s election, in which most incumbents held on to their seats, according to figures from the Town Clerk’s office. Moderator Jon Rockwood withstood a challenge from Thomas Brady, winning 1,293 votes to Brady’s 1,222. Selectman Mark Gallivan held off Joseph Monahan, 1,362 to 1,092. James Stanton won the two-year selectmen’s seat vacated by resigning member Michael Berry, defeating Alice Susan Lawson by 65 votes. In other races, Beth Muccini and Susan Flynn Curtis retained their seats on the School Committee, defeating John Sheehan, who garnered 1,243 votes to Muccini’s 1,348 and Curtis’ 1,281. Incumbent Planning Board members John Conroy and John Murtagh also won, getting 1,404 and 1,271 votes respectively to challenger Elizabeth Gaffey’s 1,184. Newcomer David Sullivan won a seat on the Sewer and Water Commission, defeating incumbent James P. Taylor and joining incumbent Roger Turner Jr. Turnout for the June 7 election was about 16 percent.