The contract may specify test methods and equipment that are outside the Department. Ensure that all the testing equipment is in good working order in accordance with the appropriate testing procedure. In addition, ensure that a qualified laboratory technician makes an independent check or calibration on each piece of testing equipment used on project testing at least once each year or as required by section 6 and 7 of the . Examples of equipment needing calibration include, but are not limited to: concrete cylinder compression machine, air meters, nuclear gauges, voltmeters, and scales. Display the date of the last check or calibration on each piece of testing equipment. Maintain calibration documentation in accordance with the QAP.