Moments after some 100 nonteaching Vancouver Public Schools employees walked out of a school board meeting in progress, the board voted unanimously on Tuesday to implement provisions of the district’s July 7 best-and-final contract offer to the workers union, effective Sept. 1.Few would consider the matter to be closed, however.Members of the Vancouver Association of Educational Support Employees again showed up in force. Green-shirted workers picketed along Falk Road before they packed the district board room. Several appealed to the school board, urging it to reopen contract talks that hit a dead end in August.The VAESP includes more than 600 nonteaching employees, including secretaries, clerks, technology assistants and paraeducators who work directly with students.Last week, the union filed a formal unfair labor practices complaint with the state’s labor board in Olympia, charging the district improperly cut off talks.The district denies any wrongdoing. In a written statement issued Tuesday, human resources Executive Director Missy Hallead rebutted the union’s assertion it is open to new talks: The union has refused to bargain protocols for layoff and work schedules that lie at the heart of the dispute, rendering useless mediation sessions in August and any new talks, she said.Workers filed from the meeting room as board President Mark Stoker read an explanation of Superintendent Steve Webb’s contract terms. The union has criticized changes in Webb’s contract, which have added thousands more dollars to his compensation package, beyond his base salary.