The applicant shall provide adequate, reliable and quantifiable information as to the extent the proposed development will impact the public facility. If the information is not sufficient for the City to determine the impact proposed development will have on a public facility, the applicant shall provide, at the applicant’s cost, an impact study prepared by a registered professional engineer licensed in the State of Oregon with respect to the proposed development and facility being studied, if a study has not already been prepared by the City. The City Engineer has the authority to determine whether an impact study is required and to set the scope of the study. The cost of the study, whether provided by the applicant or by the City, shall be included in the Improvement Costs.