Unifor has issued a formal strike notice to Medical Laboratories of Windsor.
Around 90 medical lab technicians and lab assistants will be in a legal strike position as of 12:01 Oct. 2.
Workers--represented by Unifor local 2458 across eight testing facilities have been without a contract since March.
Union officials say during the first five years of service medical lab technicians earned $22 an hour while assistants earn $13.50.
They claim that is half of what those doing the same job get paid working at a hospital.