Universal practice test, question 61 of 100

A technician recovered refrigerant from a 30-pound R-22 rooftop unit before it was scrapped. What records must the technician keep, and for how long?

• ANone, because the unit holds less than 50 pounds
• BCompany, location, date and refrigerant type, for three years
• CA leak rate calculation, for one year
• DA copy of the owner's retirement plan for the unit, for five years