25 Pa. Code § 78.103
The owner or operator of a well granted inactive status shall monitor the integrity of the well on an annual basis and shall report the results to the Department. The owner or operator shall give the Department 3 working days prior notice of the annual monitoring and mechanical integrity testing. For wells that were drilled in accordance with the casing and cementing standards of §§ 78.81-78.86 (relating to casing and cementing), the operator shall monitor the integrity of the well by using the method described in § 78.102(2)(ii)(A), (B), (D) or (E) (relating to criteria for approval of inactive status), as appropriate. For a well that was not drilled in accordance with the casing and cementing standards, the wells shall be monitored in accordance with § 78.102(1). To qualify for continued inactive status, the owner or operator shall demonstrate, by the data in the monitoring reports, that the condition of the well continues to satisfy the requirements of § 78.102. The owner or operator shall submit the report by March 31 of the following year.
25 Pa. Code § 78.103
This section cited in 25 Pa. Code § 78.91 (relating to general provisions); 25 Pa. Code § 78.101 (relating to general provisions); 25 Pa. Code § 78.104 (relating to term of inactive status); 25 Pa. Code § 78.102 (relating to criteria for approval of inactive status); and 25 Pa. Code § 78.105 (relating to revocation of inactive status).