The Regional Administrator may award a Step 2+3 grant which will provide the Federal share of an allowance under appendix B and the estimated allowable cost of the project only if:
(a) The population of the applicant municipality is 25,000 or less according to the most recent U.S. Census;
(b) The total Step 3 building cost is estimated to be $8 million or less; and
(c) The project is not for a treatment works phase or segment.