SR 06:147 - Laserfiche WebLink

discharge location. Three agencies handle the basic components (collection, treatment, and disposal) of sewer service within the City. Pleasanton provides its own sewage collection services within the City's limits. The Dublin-San Ramon Services District (DSRSD) provides sewage treatment services under contract with PIeasanton. The Livermore-Amador Valley Water Management Agency - a joint powers agency between Pleasanton, Livermore and DSRSD - provides export services for treated sewage effluent. The Regional Water Quality Control Board permits Pleasanton, Livermore and the sewer service area of DSRSD to use the San Francisco Bay as the discharge point for treated wastewater. A discussion of Pleasanton's wastewater collection, treatment and disposal facility program is presented below. Figure VI-l shows the location of sewage treatment plants, pump stations, and the export system. Collection System The City of Pleasanton owns, operates, and maintains a wastewater collection system within its boundaries. Total pipeline length within the service area exceeds 250 miles and consists of local and trunk sewer pipes ranging in size from four to forty-two inches in diameter. In addition to numerous sewer mains and collectors, four major trunk sewers are tributary to the wastewater treatment plant and the ten pump stations in the system. PIeasanton's sewer flows include sewage from the Castlewood area, but do not include sewage from the Ruby Hill area. Under contract with the City of PIeasanton, the City of Livennore treats Ruby Hill wastewater flows. In order to determine appropriate collection system sizing, the City is currently preparing a Wastewater Collection System Master Plan expected for completion in mid 2006. This Plan has preliminarily identified facility capacities and improvements for build-out conditions of this General Plan. By using winter water use data for existing parcels and uses within the City, the City determined the amount of wastewater generated by various land uses in the Planning Area. Based on preliminary results of the Wastewater Collection System Master Plan, the City's sewage collection system is adequate for current flows. The major trunk lines included in the City's past wastewater collection system master plan are in place and are sized appropriately to accommodate existing flows. However, based upon continued development in accordance with this General Plan, the City has identified need for some improvements to the existing collection and pumping system. These improvements include construction of new or parallel sewers, diversion structures, and modifications, improvements, or complete reconstruction of various pump stations. These improvements do not include in-tract sewers or pipelines in residential or commercial developments smaller than 10 inches in diameter, for which individual project developers will pay. The City's Capital Improvement Program includes projects designed to maintain the existing system and improve the performance of individual sub-components. With respect to the construction of new sewer-main lines, this construction will be funded and constructed by new development as it occurs. VI-2