Use semicolons to separate statements too closely related to stand alone.
For example: Durham College features campuses in Oshawa, Whitby and Uxbridge; close to 80 programs are available to students at the campuses.
Use a semicolon to separate phrases that contain commas.
For example: John Smith, athletic director; Jane Smith, sports information and marketing officer; Sue Smith, athletic officer; and Steve Smith, athletic officer, all work for the Department of Athletics.