4 Pa. Code § 7a.93
The Department of Environmental Protection (Department) will establish clear guidance that describes permit application requirements. The permit decision guarantee policy (policy) developed by the Department for implementation of this subchapter must include a predictable processing time for each permit application covered by the permit decision guarantee. The policy must establish that the Department will strive to process environmentally-protective applications as expeditiously as possible but no longer than the established processing times. The policy must indicate that only applications that are complete and technically adequate are eligible for the permit decision guarantee and that incomplete or severely deficient applications will be returned to the applicant. The processing time is the total number of business days beginning with the receipt of an application and ending with the final action by the Department.
4 Pa. Code § 7a.93