Agmt11 V & A Consulting Engineers

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. i Prolect Approach and Levels of Service Municipalities spend Thousands of dollars conducting master planning efforts to guide their future capital improvement projects and focus their maintenance efforts. Municipalities then spend millions of dollars implementing capital improvement projects, rehabilitation/ replacement projects — decisions based partly, or completely, on data derived from flow monitoring and flow monitoring analysis techniques. The critical importance of professional, quality, and repeatable field data cannot be understated. In today's wastewater industry, flow monitoring should no longer be considered commoditized work. The stakes are too high, the data is too valuable, and the resulting decisions are too critical for flow monitoring not to be regarded as anything but a professional practice. V &A's primary responsibility to its clients is to provide data that is accurate and reliable, and In a professional, user - friendly format. V&A's approach to flow monitoring is based upon this pledge of accuracy, reliability and professionalism, and we continually strive to improve the standards and processes by which this data is obtained and reported to its clients. We believe in proper project planning. We have a QAIQC process in the field and in the office that is unparalleled. We believe that choosing the best available site for the intended monitoring basin Is key to a successful project. All flow meters are installed by engineers and technicians who understand the intricacies of storm sewer and stream metering practices and design and can use professional judgment to address sanitary sewer flow conditions. The persons performing the confined space entries, handling and installing the flow meters, care about quality and integrity of the data, care about whether or not the velocity is optimal for meter data acquisition, and care how much of an offset is required so as to prevent sedimentation build- up and potential loss of data. For this project, since we are dealing with large - diameter storm sewer pipelines as well as irregularly shaped creeks and streams, a critical item will be conducting velocity profiling for each flow monitoring location. Average velocity across the wetted pipe cross - section cannot be definitively measured by monitoring equipment. Field calibration of average velocity across the wetted pipe cross - section depends on a comparison with other metering instruments and profiling methods developed and accepted within the flow metering industry. Point velocity ,. / measurements will be made using a Marsh - McBirney Flo- Mate Portable Velocity Meter (Figure 1). The size of the pipeline and the depth of flow will determine the extent of 1\` velocity profiling required for each flow monitoring site. Figure 1. Flow Mate Sensor and Case 10 -0614 Storm Page 2 of 8 • 1-