The lead agency shall make its threshold determination based upon information reasonably sufficient to evaluate the environmental impact of a proposal (WAC 197-11-055(2) and 197-11-060(3)). The lead agency may take one or more of the following actions if, after reviewing the checklist, the agency concludes that there is insufficient information to make its threshold determination:

(1) Require an applicant to submit more information on subjects in the checklist;

(2) Make its own further study, including physical investigations on a proposed site;

(3) Consult with other agencies, requesting information on the proposal's potential impacts which lie within the other agencies' jurisdiction or expertise (agencies shall respond in accordance with WAC 197-11-550); or

(4) Decide that all or part of the action or its impacts are not sufficiently definite to allow environmental analysis and commit to timely, subsequent environmental analysis, consistent with WAC 197-11-055 through 197-11-070.