Specifications include, but are not limited to: Installation of 10 flow meters in CSO regulator structures. The goal of the CSO monitoring is to provide near real time data alerting the operator of an overflow for timely reaction, quantifying and characterizing frequency, volume and duration of overflow events for reporting purposes and for use in flow modeling for future CSO abatement project design. Two of the CSO monitoring sites currently use radio telemetry to communicate to the SCADA system. All proposed monitoring sites have been metered previously for these purposes and it is expected that these sites can be used for metering under the scope of this request. More information on site locations can be found in Attachment A.; The condition, inverts and configuration of the structures vary and may be irregular shapes. Some regulator structures may be subject to influence from adjacent rivers. Bidders are required to propose specific monitoring and telemetry equipment and installation configurations for each site to ensure accurate and reliable monitoring data. Selected flow meters and configurations must characterize the entire flow within each structure. This may require redundant metering. Flow metering equipment should include a data logger, communication device and sensing units and be capable of recording in both low flow and surcharged conditions. Data should be recorded at 5-minute intervals. At a minimum, velocity, depth and flow shall be recorded.; The successful bidder shall maintain a minimum of two rainfall gauges that provide rainfall data related to volume, duration and intensity in 15-minute increments.; Raw data shall be checked, cleaned and balanced via a written QA/QC process to produce a final data set. The successful bidder will provide raw data in a near-real time basis and provide final reports to the City on a monthly basis.; The successful bidder will be required to provide traffic control for installation and any subsequent site visits to each monitoring site.; The successful bidder will provide, install and calibrate all necessary equipment and hardware and document installation and calibration activities. Site set-up information shall include, but is not limited to, measured sensor offsets, site name, manhole number, sewer pipe size, CSO discharge pipe size and calibration data.; The flow monitoring equipment shall be programmed to record depth, velocity and flow. All bidders must describe the method to be used for velocity profiling and velocity calibration.; Flow monitoring equipment will be programmed to record depth in inches, velocities in feet per second and flow will be calculated in either million gallons per day or gallons per day.; All repairs, adjustments, maintenance or replacements of equipment should be made within 72 hours of issue discovery to prevent substantial periods where continuous data collection cannot be maintained. The flow meters shall be maintained in a manner that shall provide for a minimum of ninety percent (90%) uptime and for eighty-five percent (85%) data reliability. Data reliability is identified as the percentage of flow data that has been collected that is not obviously incorrect (i.e., flat lines or drifted from known calibration levels).; The successful bidder will provide all labor, materials, equipment and tools required to support and maintain all monitoring points for the duration of the contract, including all equipment required for confined space entries and traffic control. The successful bidder will be responsible for all diagnostic and repair costs for any damaged equipment.
