FAQs

    For quick answers to common questions, try our FAQ first!

    FAQs

    Headquarters

    Main Office: 2141 W North Ave, Chicago, IL 60647

    Laboratory: 330 Georgetown Sq, Wood Dale, IL 60191

    Headquarters

    Working hours

    Open Monday to Saturday
    From 08:00 AM to 9:00 PM

    Working hours

    You can also email us at info@ositservice.com