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1.0 PROJECT DESCRIPTION EBDA PIPELINE The City is a joint member of EBDA. Treated effluent from the WPCP is transported by EBDA's system through a 48-inch effluent pipeline, shown in Figure 1-2, which parallels the shoreline of the Bay for two miles in San Leandro, Near the end of the pipeline the San Leandro effluent is combined with other effluents from Hayward, Oro Loma Sanitary District, and Union Sanitary District at the EBDA dechlorination facility and discharged to San Francisco Bay. The combined effluent passes through a dechlorination station prior to discharge via a deepwater outfall located seven miles offshore. San Leandro's flow constitutes less than 10 percent of all the flows discharged through EBDA's outfall. CURRENT REUSE AREAS No recycled water is currently used within the City's boundaries. As stated in Section 1.1, the recycling of secondary effluent from the WPCP began in 1988 when EBMUD entered into contract with the City to purchase recycled water. EBMUD constructed a pump station, sodium hypochlorite disinfection system and distribution pipelines to convey recycled water from the WPCP for use at Chick Corea Golf Course and Harbor Bay Park Way median in Alameda and Metropolitan Golf Course in Oakland. The WPCP provides an average of 0.4 mgd (12.3 million gallons per month) of recycled water annually to EBMUD. 1.5 PROPOSED PROJECT The City is proposing to provide recycled water to the following areas (shown on Figure 1-2): Monarch Bay Golf Complex (Phase la); ^ Marina Park, the par course at Marina Park (Marina Park/Par Course), and road medians near and around the Monarch Bay Golf Complex and Marina Park (Phase lb); and Oyster Bay Regional Park (Phase 2). Two types of recycled water, disinfected secondary-233 and disinfected tertiary4 would be required for the planned irrigation areas in San Leandro. Disinfected secondary-23 water can be As defined in California Health Laws Related to Recycled Water (the "Purple Book") (DHS, 2001), disinfected secondary-23 recycled water is recycled water that has been oxidized and disinfected sa that the median concentration of total coliform bacteria in the disinfected effluent does not exceed a most probable number (MPN) of 23 per 100 milliliters utilizing the bacteriological results of the last seven days for which analysis have been completed, and the number of total coliform bacteria does not exceed an MPN of 240 per 100 milliliters in more than one sample in any 30 day period. Disinfected tertiary recycled water means a filtered and subsequently disinfected wastewater that meets the following criteria: (a) the filtered wastewater has been djsinfected by either: (1) a chlorine disinfection process following filtration that provides a CT (the product of total chlorine residual and modal contact time measured at the same point) value of not less than 450 milligram-minutes per liter at all times with a model contact time of at least 90 minutes, based on peak dry weather design flow; or (2) the median concentration of total coliform bacteria measured in the disinfected effluent does not exceed an MPN of 2.2 per 100 millilikers utilizing the bacteriological results of the last seven days for which analyses, have been completed and the number of total coliform bacteria does not exceed an MPN of 23 per 100 milliliters in more than one sample in any 30 day period. No sample shall exceed an MPN of 240 total coliform bacteria per 100 milliliters. San Lcandro Recycled Water Project 1-6 ESA /?A3193 Draft IS/MI~ID