Section 144-224-A-7 - INSPECTIONS AND RECORDS REVIEWA. Each registrant shall make available for inspection to the Department during working hours records maintained pursuant to these regulations. Records to be maintained are: 1. Radon testers and evaluators. Client name, address, location of structure if different than client address, test device ID number(s), location(s) of test device(s), and test results.2. Radon mitigators. Client name, address, phone number, location of structure if different than client address, pre-mitigation test result and location, post-mitigation test result and location, mitigation system type, and any variations from the minimum performance standards listed in these rules.B. The Department is authorized to visit places of business and testing or mitigation locations in order to review records and to observe mitigation techniques, laboratory operations, and other such radon services for the purpose of verifying the quality of radon services work.10- 144 C.M.R. ch. 224, § A-7