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than 5,000 square feet of land disturbance and requires any modification or reduction of the landward 50 feet of the 100 foot buffer area. Submission of a plan of development that demonstrates through the use of calculations provided for by Section 9.1-11 D (1) that the remaining buffer area and necessary best management practices will result in removal of no less than 75 percent of sediments and 40 percent of nutrients from post-development stormwater runoff shall be deemed to have satisfied the requirement for a minor water quality impact assessment. (4) Major Water Quality Impact Assessment. A major water quality impact assessment shall be required for any development which (i) exceeds 5,000 square feet of land disturbance within an RPA; or (ii) is located in an P~4A and is deemed necessary by the City Engineer. The information required in this section shall be considered a minimum. The following elements shall be included in the preparation and submission of a major water quality assessment: (a) Ail of the information required in a minor water quality impact assessment, as specified in Section 9.1-11 F (3); (b) A hydrogeological element that: i. Describes the existing topography, soils, hydrology and geology of the site and adjacent lands. ii. Describes the impacts of the proposed development on topography, soils, hydrology and geology on the site and adjacent lands. iii. Indicates the disturbance or destruction of wetlands and justification for such action; iv. Indicates the disruptions or reductions in the supply of water to wetland, streams, lakes, rivers or other water bodies; Indicates the disruptions to existing hydrology including wetland and stream circulation patterns; 19