A chiller containing 150 pounds of HCFC refrigerant is leaking above the leak rate threshold. Unless granted additional time, what must be completed within 30 days?
a. Repair the appliance so that it leaks below the threshold and conduct the initial verification test.
b. Retrofit the appliance to a different natural refrigerant approved by ASHRAE.
c. Document that all OEM replacement parts have been ordered.
d. Notify the EPA of the leak rate and the time required to complete the repair.