ID 641170
Archived
Alameda County
Owner Reference: 800-550
Bid Date: 10/20/2022 at 02:00pm
Pre-Bid: 09/22/2022
A site visit prior to bidding is not mandatory for bidders to be qualified to bid on the project. Prebid photos and videos of the Site of Work as described in the Contract Documents are available to download and view at the hyperlink below:
https://www.unionsanitary.ca.gov/about-us/usd-construction-projects/prebid-photos-and-videos
To attend the prebid conference by web browser, use the Zoom link below for video and audio: https://us02web.zoom.us/j/81601078563 To attend the pre-bid conference by phone: Call: 1-888-788-0099 or 1-877-853-5247 Meeting ID: 816 0107 8563# Participant ID: #
Estimate: $8.6 Million
Trades: A - General Engineering Contractor GEC
The project consists of mechanical, electrical, instrumentation, and structural improvements to the Newark Pump Station (NPS) and Irvington Pump Station (IPS). More specifically, the work includes, but is not limited to, the following work elements: • Demolition of existing vapor phase odor control system and roof-mounted exhaust fan at NPS. • Installation of new odor control engineered media biofilter serving NPS odor sources along with remote odor control exhaust fan with variable frequency drive (VFD) unit and two (2) stack fans and stack at NPS. • Replacement of existing supply air fan with new supply air fan at NPS. • Replacement of chemical bulk storage tank along with level instrumentation and controls at NPS. • Replacement of the two (2) chemical metering pumps along with new VFDs at NPS. • Replacement of chemical dosing piping with new double containment piping with leak detection in existing utility trench from metering pumps to intermediate level of the dry well side of the pump station building at NPS. • Rehabilitation and recoating the chemical bulk storage containment area at NPS. • Providing of stair tower access to pump station roof and providing guard railing at existing roof parapet at NPS. • Rebalancing of supply air and exhaust air flow rates from the existing pump station facility at NPS. • Cathodic protection repair of raw sewage (RS) pipe joint at NPS. • Miscellaneous electrical and instrumentation improvements at NPS. • Demolition of existing odor control chemical packed tower scrubber system at IPS. • Providing temporary odor control system at IPS. • Demolition of existing concrete equipment pit currently housing the odor control system and chemical dosing metering pumps at IPS. • Installation of new odor control engineered media biofilter serving IPS odor sources along with new odor control exhaust fan with VFD and two (2) stack fans and stack at IPS. • Replacement of chemical dosing piping with new double containment piping with leak detection placed in new utility trench routed from chemical bulk storage containment area to existing valve vault at IPS. • Relocation of the two (2) existing chemical metering pumps to the existing chemical bulk storage containment area to be expanded and provide with new VFDs at IPS. • Rehabilitation and recoating the chemical bulk storage containment area at IPS. • Rehabilitation of corroded section of existing RS piping with welded steel patch at location of existing unused ferrous chloride injection point at IPS. • Installation of new RS bypass piping including piping, supports, platform access, cathodic protection, flow meter, throttling valve, and accessories to allow controlled bypass around the existing surge tower to the existing Equalization Basins at IPS. • Repair and rehabilitation of corroded components located in the existing valve vault at IPS. • Providing of bridge access to pump station roof from new biofilter structure and providing guard railing at existing roof parapet at IPS. • Rebalancing of supply air and exhaust air flow rates from the existing pump station facility at IPS. • Replacement of eleven gate valves and actuators at the raw sewage pumps 1 through 4 inlet and discharge piping along with the downstream header system with knife gate valves and actuators at IPS. Refurbishing of four existing gate vales at pumps 5 and 6. • Installation of new Training Facility components including interconnecting piping, concrete box, valves, and manholes at IPS. • Miscellaneous electrical and instrumentation improvements at IPS. 655 calendar days completion. Bonds required. Prevailing wages.
Union Sanitary District CA
Thomas Lam
(510) 477-7609
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Published 09/19/2022 on Construction Bid Source
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