David Evans and Associates Inc. 6/23/2021 Amendment 2

EXHIBIT A-1 City of Everett Lift Station #15 and Force Main Amendment 2 Scope of Work — Design, Bidding and Construction Support Services May 24, 2021 Introduction The City of Everett owns and operates a domestic wastewater"lift station" (hereinafter referred to as the "existing station") immediately adjacent to an existing City-owned bridge along W. Mukilteo Blvd. The existing station is situated on the north side of the road, on a steep bank above Edgewater Creek, immediately west of Shore Ave. The existing station is west of the City's Edgewater Park, a 1.25 acre neighborhood park. The park includes limited parking immediately east of the existing station/west of the park, a large lawn and sport and play areas. The City is planning a project to replace the W Mukilteo Blvd. roadway bridge that crosses Edgewater Creek and will require additional space for construction and temporary facilities. That work is anticipated to require decommissioning of the existing station and rerouting of various sewer pipes. As of May 2021, construction drawings for the proposed Edgewater Creek Bridge Replacement, show that a temporary work bridge will be constructed in the area directly in conflict with the existing station. The temporary work bridge will be constructed above the existing station and require multiple deep piles to be installed. Preliminary coordination with the City's project manager for the bridge project confirms that the Bioxide® tank and its block retaining walls and slab can remain in place, but that the existing station structure will need to be modified to allow completion of the temporary work bridge. The City desires to complete a new lift station and force main project prior to starting the bridge replacement project, in order to not hinder the bridge project. The new submersible pump station will be located in the parking area and immediately adjacent area at the northwest corner of Edgewater Park. The temporary bridge support piers will be strategically located in order to allow the Bioxide®tank to remain and operate in its current location. The City also desires to construct, by contract separate from the lift station project, approximately 2,700 feet of new 6" force main along Shore Ave, from the proposed lift station location to a new manhole on an existing 20" sewer main. Flow will then continue northerly in existing sewer mains down to the City's Mukilteo Beach interceptor. Lift Station #15 and Force Main Improvements The proposed upgrade, modifications or additions are detailed in a pre-design memo from DEA to the City dated May 11, 2021 and are summarized generally as follows: • New duplex submersible pump station at northwest corner of Edgewater Park, in parking area and corner of park lawn, adjacent to inside of bend of Shore Ave. Station structures will be precast concrete wet well with flat top slab and aluminum double door hatch, with safety grade and a separate precast concrete valve vault with flat top slab and aluminum double door hatch. Pumps shall be Flygt/Xylem with N-impeller, rated for 450 gallons per minute each. David Evans and Associates, Inc. Page 1 of 8