Before a local government takes any major action with a probable significant and adverse environmental impact (e.g., approval of a building permit or plat application), it must prepare an EIS. RCW 43.21C.030(2)(c), .031. An EIS must analyze a proposal in light of its significant adverse impacts and consistency with local environmental policies and discuss alternatives to the proposal, mitigation measures, and unavoidable impacts. RCW 43.21C.030(2)(c), (d), .031; WAC 197-11-440; Victoria Tower I, 49 Wn. App. at 758.
A local government may condition or deny a proposal based on adverse environmental impacts which make the action inconsistent with previously adopted local SEPA policies, even if the project complies with local zoning and building codes. RCW 43.21C.060; Polygon Corp. v. Seattle, 90 Wn.2d 59, 64-66, 578 P.2d 1309 (1978); Victoria Tower II, 59 Wn. App. at 597; West Main I, 106 Wn.2d at 53; West Main Assocs. v. Bellevue, 49 Wn. App. 513, 525-26, 742 P.2d 1266 (1987) (West Main II), review denied, 112 Wn.2d 1009 (1989). However, under vesting law local government "cannot frustrate the development by enacting new zoning regulations" once a development is vested. West Main I, 106 Wn.2d at 51.
Procedurally, when presented with a proposal (application), the County must make a threshold determination of environmental significance or nonsignificance, usually based on an environmental checklist prepared by the applicant. WAC 197-11-100, -315, -330. If it issues a determination of significance, the County must determine the scope of the required EIS. RCW 43.21C.031; WAC 197-11-360, -408, -410. It does so by consulting with a variety of interested persons and organizations. RCW 43.21C.031; WAC 197-ll-408(2)(a).
Although the local government or agency "may have an EIS prepared by agency staff, an applicant or its agent, or by an outside consultant", the local government, here Thurston County, remains responsible for the EIS. WAC 197-11-420(2), (1), -100(3), -050. Following circulation of a draft EIS to federal and state agencies, other political subdivisions, tribes,