Note: You will need to send us a copy of your current, unexpired CPO Certificate or wallet card to take this class.  If you cannot find it, please contact the PHTA at 719-540-9119.  IF YOUR CPO IS EXPIRED, YOU MUST TAKE THE FULL TWO-DAY CLASS!  This class is a refresher only.  You will receive the latest copy of the CPO handbook.  Being that the class is only one day, we will not delve deeply into the subject matter, including the math.  For example, by now you should know how to calculate pool & spa volume, chemical dosing and the Langelier Saturation Index.  If you feel you need more than a quick refresher, we urge you to take the full two-day class.  There is a possibility that this class will last more than 8 hours since you will have up to 3 hours to complete the 50 question, multiple choice, open book exam.