[Code of Federal Regulations] [Title 40, Volume 22] [Revised as of July 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR142.52] [Page 620] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 142_NATIONAL PRIMARY DRINKING WATER REGULATIONS IMPLEMENTATION --Table of Contents Subpart F_Exemptions Issued by the Administrator Sec. 142.52 Consideration of an exemption request. (a) The Administrator shall act on any exemption request submitted pursuant to Sec. 142.51 within 90 days of receipt of the request. (b) In his consideration of whether the public water system is unable to comply due to compelling factors, the Administrator shall consider such factors as the following: (1) Construction, installation, or modification of the treatment equipment or systems. (2) The time needed to put into operation a new treatment facility to replace an existing system which is not in compliance. (3) Economic feasibility of compliance.