Agmt23 BKF Engineers Tract Pump Station Improvement Project

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REV: 11-07-23 SK backflow and a slide gate valve will isolate the structure on the downstream end. Consultant anticipates that the duty pumps will operate with a lead-lag1- lag2 pumping control strategy with the third duty pump as a backup in case either of the first two duty pumps fail or during very large storm events such as the 100-year storm. Consultant will establish anticipated footprints for the pump station wet well, discharge vault, and the control panels for use in the preliminary enclosure layout. Subtask 4.2 – Preliminary Pump House Layout Alternatives Consultant will prepare two (2) pump station alternative layouts for review. Consultant will also provide two pipe network alternative layouts in proximity to the station (i.e., intake line and discharge line). Additional layouts, if required, will be provided as an additional service. Each alternative will include a preliminary layout for the proposed pump station and associated site structures. Consultant will prepare exhibits (10% drawings) using the topographic and utility maps collected from the site survey. Consultant will identify setbacks and critical equipment. The pump station is assumed to be an indoor facility protected by a fence. Consultant will assume that the gate manhole with a manually operated slide gate is required upstream of the wet well. Consultant will assume the facility will also require a new motor control center, pad- mounted transformer, lighting, gas detection panel, permanent generator and standby-generator hookups, reduced pressure backflow assembly with hose bib, a stainless-steel combination eyewash/drench hose unit and wash-down sink. Consultant anticipates that the facility will not create and/or replace 5,000 square feet or more of impervious surface, so compliance with the Provision C.3 of the Municipal Regional Permit (MRP) is not anticipated to be required, so design of stormwater best management practices (BMPs) is not included. Design of stormwater BMPs may be provided as an additional service. Consultant will review the preliminary enclosure layout with the City to obtain preliminary concurrence prior to developing the 60% drawings. Subtask 4.3 –Preliminary Vehicle Access Consultant will prepare a vehicle access exhibit demonstrating easy access to the pump station from the adjacent road. Consultant will utilize AutoTURN with turning radii provided by the City. If the City does not have specific turning radii, Consultant will use typical large maintenance vehicle turning radii. Consultant will also show proposed parking locations for routine visits by Operations and Maintenance staff vehicles. Subtask 4.4 – Surge Analysis Consultant will perform a surge analysis of the pump station to evaluate the discharge pipe during an unlikely surge condition to assess maximum pipe pressures. Consultant does not anticipate that surge conditions will occur, but ATTY/AGR.2023.241/BKF Engineers (Price Tract Pump Station Design) (Page 19 of 54)