Agmt06 V & A Consulting Engineering- Wastewater Inflow & Inflitration Monitoring

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EXHIBIT "A" ..... V&A 1999 Oakland. C/". 94612 'Jdengii":eenng curn November 30,2006 Ms. Grace Le Associate Engineer City of Redwood City 1017 Middlefield Road Redwood City, CA 94063 SUBJECT: Proposal for Wastewater Flow Monitoring Services Dear Ms. Le, As per our discussion, the following is our letter proposal and detailed scope of work for the subject services: SCOPE OF WORK The following is our detailed scope of work for the project services. This scope of work was developed as a result of our review of the request for proposal and represents our mutual understanding. Task Description 1. Field Reconnaissance and Document Review: V&A will review available plans and documents, and conduct field reconnaissance of the proposed flow monitoring sites identified by the City. The purpose of the reconnaissance will be to assess hydraulic conditions, manhole access, traffic control requirements, and safety issues for each site. Any modifications to the proposed meter sites will be submitted to the City for review and approval by the City. Deliverable: Documentation of site reconnaissance and final flow monitoring sites will be submitted to the City within 3 days after site reconnaissance. 2. Installation I Calibration I Maintenance I Removal of Flow Monitors: V&A will install 12 flow meters and one rain gauge for a period of 60 days starting no later than December 4, 2006, with an option to extend the monitoring on a weekly basis up to one additional month. The flow meters will be area-velocity type capable of measuring flows and flow depths under surcharge conditions. Pipe diameters will range from approximately 15 to 33 inches. Rain gauges will be tipping bucket type capable of recording to 0.01 inches. V&A will be responsible for taking all necessary safety precautions in the performance of the work, following all applicable Federal, State, and local regulations for working in confined spaces, and complying with all applicable traffic control requirements of the City or other agencies with jurisdiction over the meter sites. The flow meters and rain gauges will be installed at the approved sites and visited weekly during the monitoring period. V&A shall report to the City or City's master plan consultant within 24 hours of each site visit if any meter has malfunctioned or failed to provide good data, or if changes in site conditions have impacted collection of good data. Field calibration data (independent measurements of flow depth and velocity) will be collected throughout the monitoring period for each meter to verify monitor accuracy over a range of flow depths. The monitor data will be collected at 5-minute intervals and reported at 15-minute intervals. The meters will be interrogated at each site visit and the data OAKLAND HOUSTON