17 - Laserfiche WebLink

ATTACHMENT 2 CITY OF PLEASANTON RECYCLED WATER FEASIBILITY STUDY SCOPE OF WORK FOR CAROLLO ENGINEERS November 23, 2011 Background The following summarizes the scope of work for the Recycled Water Feasibility Study. The efforts defined in this scope are mainly based on five sources of information, namely: • The Bureau of Reclamation (BOR)Title XVI Feasibility Planning Grant requirements, • The State Water Resources Control Board (SWRCB) Water Recycling Planning Grant requirements, • The scope of work outlined in the City of Pleasanton's Request for Qualifications, • The proposal submitted by Carollo Engineers on October 21, 2011, and • The negotiation meeting conducted on November 16, 2011 between the City and Carollo Engineers. Scope of Work Task 1. Initial Recycled Water Market Analysis 1.1 Supply Analysis Four potential recycled water sources will be investigated. The information from all sources will be collected in meetings with the specified source agencies. The sources include DSRSD Waste Water Treatment Plant (WWTP), DERWA (at DSRSD WWTP), City of Livermore Water Reclamation Plant (LWRP), and a new tertiary satellite treatment facility. For three of the sources (DSRSD, DERWA, and new satellite plant) the preferred withdrawal location from the DSRSD WWTP will be identified. A combination of sources may be preferred and needed based on the demands identified. At a minimum, a summary of the following information will be collected for the three already established treatment facilities: A) Flows (mgd) - total current wwtp influent, wwtp design capacity, secondary, tertiary facility current and design capacity, currently and planned committed/contracted. These will be summarized seasonally and monthly. B) Effluent Quality — quality will be collected for irrigation parameters (EC, sodium, calcium, chloride, boron, magnesium, nitrogen, pH, etc) that exist. For the new satellite plant, information will be collected and summarized based on the secondary effluent at DSRSD. 1.2 Demand Analysis Potential demands in Pleasanton will be identified using several methods including aerial maps, existing water use from billing records, and planned water uses and developments. Carollo will use GIS land use shape files, provided by the City, and develop demands based on land use. The demands will be summarized in table format and quantified by seasonal (i.e: dry weather) and annual use, in both acre-feet and mgd. This effort will focus mainly on high water users in order to maximize the system usage. Once demands are identified, field reconnaissance trips will be conducted as needed to confirm sites and the assumed irrigation needs. Per City staff/management, water use from billing data and GIS will be provided as needed by the City.