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07
City of Pleasanton
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CITY CLERK
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AGENDA PACKETS
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2022
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011822
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07
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1/13/2022 9:52:15 AM
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CITY CLERK
CITY CLERK - TYPE
AGENDA REPORT
DOCUMENT DATE
1/18/2022
DESTRUCT DATE
15Y
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EXHIBIT A-SCOPE OF SERVICES <br /> • Data will be collected using a combination of GPS technology and conventional land surveying, <br /> depending on field conditions. Measurements will have an accuracy of+/-0.03 ft. <br /> • For all surveyed manholes, "dip form"data sheets showing the data collected above. <br /> • Photographs of each structure taken facing north, including general location showing visible <br /> landmarks and looking down into the manhole showing manhole invert and pipes <br /> Subtask 2.2b— Flow Monitoring <br /> Flow monitoring is necessary to confirm and quantify current dry and wet weather flows in the system and <br /> to calibrate the collection system hydraulic model. For the City's previous Master Plan, flow monitoring was <br /> conducted at 11 sites in the collection system. To develop proposed sites for this study, Woodard & Curran <br /> will review the previous locations and current GIS, and consider any specific flow or hydraulic issues <br /> identified by City staff. The flow monitoring plan will be submitted for the City's review and approval. For <br /> purposes of budgeting for this task, 14 flow monitoring sites are assumed, supplemented by data from <br /> existing pump station meters operated by the City and DSRSD data for flows into the treatment plant. <br /> After the City's review and approval of the flow-monitoring plan, Woodard & Curran's flow monitoring <br /> subcontractor will conduct a reconnaissance of the flow monitoring sites to confirm the locations are <br /> appropriate for monitoring from the standpoint of hydraulic conditions, safety, and access. The <br /> subcontractor will also determine the appropriate meter type for the specific hydraulic conditions at each <br /> site (all gravity flow meters will be area-velocity type, capable of recording both flow depth and velocity). <br /> The flow monitoring subcontractor will then install, calibrate and maintain the flow meters for up to two <br /> months during the wet weather season and remove the flow meters at the end of this monitoring period. In <br /> addition, three recording rain gauges will also be installed to capture rainfall data during the flow monitoring <br /> period. Woodard &Curran will review flow monitoring site reports to confirm final flow meter locations and <br /> will periodically review the flow monitoring data during the flow monitoring periods to check data quality and <br /> consistency. The flow monitoring subcontractor will provide final electronic data files (15-minute data)at the <br /> conclusion of the monitoring. <br /> Analysis of the flow monitoring data to quantify infiltration/inflow(I/I) and develop design flows is an integral <br /> part of model calibration and will be conducted as part of Task 3. <br /> Task 2 Deliverables: <br /> • Data request list and data gap analysis summary <br /> • Survey data and updated GIS data <br /> • Flow monitoring plan showing proposed meter sites and alternate sites, if applicable <br /> • Flow monitoring data <br /> Assumptions: <br /> • 14 area-velocity flow meters and 3 rain gauges installed for a period of up to two months during the <br /> 2022/23 wet weather season. <br /> • City will obtain any permits needed for flow monitoring field work; assist with traffic control for any <br /> sites where more than standard traffic control measures are needed; clean any meter sites if <br /> necessary prior to meter installation; and provide secure locations and access for rain gauge <br /> installation. <br /> • City will provide pump station flow data in Excel or equivalent format. <br /> Woodard &Curran -3- 12/20/21 <br />
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