(1) The board hereby adopts and incorporates by reference the following:

(a) 40 CFR 141.4(a) , which sets forth general requirements for variances and exemptions;

(b) 40 CFR Part 142, Subpart E, which sets forth requirements for variances, except that the department has the same authority as the EPA administrator has in a state that does not have primary enforcement responsibility for enforcement of the SDWA;

(c) 40 CFR Part 142, Subpart F, which sets forth requirements for the issuance of exemptions, except that the department has the same authority as the EPA administrator has in a state that does not have primary enforcement responsibility for enforcement of the SDWA;

(d) 40 CFR Part 142, Subpart G, which sets forth the identification of best technologies, treatment techniques, or other means generally available; and

(e) CFR Part 142, Subpart K, which sets forth the requirements for variances for small public water supply systems.