Project consists of replacement of one (1) sanitary sewer lift station and appurtenances at 2175 Montiel Road, San Marcos, California 92609, construction of approximately 4,150 linear feet of 6-inch diameter sewer force main and appurtenances at the downstream of the lift station, rehabilitation of approximately 1,370 linear feet of 10-inch gravity sewer pipeline with manholes and appurtenances at the upstream of the lift station. The estimated construction cost is $6,250,000. The Owner designates Carlos Mendoza, P.E., Michael Baker International, as the Engineer of Record under the Contract Documents. Q&A Deadline 07/26/2023 5:00 PM (PDT)Questions regarding the project will be answered up to 5 working days before the bid opening. Because of the time necessary to notify bidders, no addenda will be issued within 5 working days of the date set for the opening of bids. Lift Station Replacement (DWG C-5 thru C-13) o Demolition and Disposal of Existing Lift Station o Sheeting, Shoring, and Bracing (Protection of Ex. Utilities) o Site Excavation and In-Situ Excessive Earth Export and Dewatering Additional Exploratory Auger Borings at LS Site (Addendum No. 1)Hard Rock approx. 18.5 - 26.0 feet beneath the existing ground Groundwater at approx. 12.0 - 18.5 feet beneath the existing groundA Special Use Discharge Permit from Encina Wastewater District would berequired for groundwater discharge to the VWD sewer system. o Construction of a New Sanitary Lift Station Cast-In-Place Concrete Works including new wet well, valve vault, concrete slabs on grade o Below grade 12' x 7' (inside dimensions) concrete valve vault o Below grade 21' x 30' (inside dimensions) wet well lift station structure o 35-40 ft deep Mechanical Improvements o Including new pumps, piping, valves, and appurtenances o Two (2) 20 HP submersible sewer pumps (1+1) with 400 gpm ultimate system flow Chemical storage area, TriOxyn chemical injection system w/ SCADA controls improvements Enviro prep mixing and suspension system Electrical, Instrumentation & Controls Improvements Outdoor permanent emergency 60-kilowatt diesel generator with 24-hour integral fuel tank and automatic transfer switch for back-up power Electrical/supervisory control and data acquisition (SCADA), antenna mast Mixing and Odor Control Equipment Vertical Construction including Electrical & Controls Room/Restroom o Installation of 45 LF of 8-inch PVC sewer o Drainage Piping o Installation of (3) 4 ft manholes (District Standard Zebron MH Liner System) o Removal and Replacement of approximately 460 LF of 6-inch ex DIP forcemain with 6-inch HDPE DR 19 forcemain o Connecting New Forcemain to Existing Forcemain o Cleaning, Plugging, and Abandoning Existing Force Main in Place o AC Paving o Yard Piping Removal & Replacement o Site Restoration o Construction of Retaining Wall o Construction of Concrete Swale