Any alteration of the hydrology of the site shall be minimized and/or mitigated so as to minimize the impact on water quality, peak discharge, groundwater recharge, and drainage patterns. To the extent possible, the quantity, quality, and timing of stormwater runoff during and after development shall not be substantially altered from pre-development conditions. The recommended technical standards for the design of post-construction structures are detailed in the "New York State Stormwater Management Design Manual," as revised. In reviewing the adequacy of an applicant's stormwater management plans, the Planning Board may seek recommendations from a licensed engineer selected by the Town and paid for by the applicant.