Agmt12 West Yost Associates (2) - Laserfiche WebLink

Browse Search

EXHIBIT "A" SCOPE OF SERVICES AND TIME SCHEDULE PROJECT DESCRIPTION: Update the city's 2008 Sewer System Master Plan to include amending the existing hydraulic model to incorporate bui�dout projections from the recently updated General Plan, evaluating recommended capacity improvements using the new projections, and assessing whether flow data collected since 2008 may lead to a measurable difference in predicted flows and associated recommendations. SCOPE OF SERVICES: Task 1 — Project Management This task includes a kick-off ineeting to exchange important project information, define roles and expectations, and set goals and critical deadlines for the project. Task 1 also provides budget and schedule control, and quality assurance and quality control of all deliverables. Deliverables include meeting agendas, m inutes, invoices, and monthly status reports. Task 2—Hydraulic Model and Master Plan Update Task 2.1 —Data and Svstem Review Consultant shall review the following information, as available, and will utilize the 2008 calibrated hydraulic model that is provided by the city: a) 2008 model data including network, loads, and runs/results b) GIS shapefiles used for model development, and produced for the 2008 Master Plan Report c) Electronic data provided for development of the 2008 hydraulic model d) Flow data used for calibration of the 2008 hydraulic model e) Flow data acquired since 2008 fl SSO data as available through the CIWQS public reports since 2008 Task 2.2— Review Wastewater Flows In the 2008 hydraulic model, Peak Dry Weather Flows (PDWF) were simulated by assigning base wastewater flows in part from 2000 census data, adjusted to reflect 2005 Association of Bay Area Governments (ABAG) census projections. 2010 census data has shown that the population has increased by approximately two percent since 2000. Consultant shall evaluate this trend to confirm that this information does not necessitate any changes to base wastewater flow projections for PDWF simulations. In addition, Consultant shall review large user water information (e.g., commercial and industrial users) to confirm that the model accurately represents these larger point loads. The 2008 hydraulic model simulated Peak Wet Weather Flow (PWWF) conditions by assigning rainfall dependent inflow and infiltration (RDII) factors to calibrate modeled flows to wet weather flow data captured during three consecutive years beginning in 2005. The industry-accepted "RTK" method was utilized for this wet weather calibration. Since this time, the City has ATTY/AGR/2012.044NVEST YOST ASSOCIATES REV:06-12-12 VR Page 10 of 13