Specific Adverse Impacts. In addition to the criteria listed in this section, a proposed two-unit development may be denied if the building official makes a written finding, based on a preponderance of the evidence, that the proposed housing development project would have a specific, adverse impact upon public health and safety or the physical environment, for which there is no feasible method to satisfactorily mitigate or avoid the specific, adverse impact. A "specific adverse impact" is a significant, quantifiable, direct, and unavoidable impact, based on objective, identified written public health or safety standards, policies, or conditions as they existed on the date the application was deemed complete. Inconsistency with the zoning ordinance or general plan land use designation and eligibility to claim a welfare exemption are not specific health or safety impacts.