(1) The department shall be the lead agency for the following actions:

(a) Adoption or amendment of regulations relating to radioactive source materials; proposals to construct, operate, or expand any uranium or thorium mill, or any tailings areas generated by uranium or thorium milling, or any low level radioactive waste burial facilities. The responsible official would be the division director, division of radiation protection, environmental health programs. Lead agency determination for other mineral processing proposals should be made in accordance with WAC 197-11-924 through 197-11-948;

(b) Approval of comprehensive plans for public water supply systems when such plans are developed by private applicants and unless indicated otherwise by WAC 197-11-932, 197-11-934 and 197-11-936, and approval of new public water supply systems or major extensions of existing public water supply systems when such systems are being proposed by a private applicant unless indicated otherwise by WAC 197-11-932, 197-11-934, and 197-11-936. The responsible official would be the section head, water supply and waste section, division of environmental health;

(c) Construction of any building, facility, or other installation for the purpose of housing department personnel or for fulfilling other statutorily directed or authorized functions. The responsible official would be a capital programs representative from the management services division, comptroller's office;

(2) Determination of the lead agency for department major actions not listed above shall be made in accordance with the procedures and requirements of WAC 246-03-140 (4)(c) and 197-11-922 through 197-11-948.