A proposal to fund construction of a new Galvin Middle School and a $70.4 million proposed budget for the 2013 fiscal year are among the warrant articles facing Town Meeting when it convenes at 7:30 p.m. Monday in the middle school auditorium. The appropriation to fund the town’s share of the $73.96 million school project would be contingent on passage of a temporary tax increase, through a Proposition 2½ debt-exclusion override, at a June 9 special election. The Massachusetts School Building Authority has committed to reimbursing the town for 54.67 percent of eligible costs, or up to $34.69 million. In other business, the annual session will take up a proposed $1.75 million capital budget, and funding to improve the athletic fields and facilities at Wakefield Memorial High School. It will also take up spending requests to fund contract agreements with the police patrolmen’s and superior officers’ unions; to purchase a fire truck; and to carry out road and sidewalk improvements.