Manassas City Of--question, Environmental Manassas, VA 20108 Phone : (703) 792-6311 Business Category Government Offices & Public Schools Manassas City Environmental 8470 Kao Cir Manassas, VA 20110 Phone : (703) 792-6311 Manassas City Environmental Business Category Government Offices-City Village & Twp Environmental Conservation & Ecological Services Government Offices State & Local Government Offices & Public Schools