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RMC will evaluate the capital needs associated with connecting the land use parcels within the Happy Valley study area to the City of Pleasanton collection system. Subtask 3.1 Evaluate New Facilities • Determine sizing and alignment of new sewers. • Estimate capital cost for construction of new sewers Subtask 3.2 Evaluate Existing Facilities • Confirm capacity of existing trunk sewers south of and up to Sunol Boulevard. • Confirm capacity of Pump Stations 5-12 and 5-14 and associated force mains. • Verify existing collection system infrastructure and conformance with City wastewater system standards. • Estimate capital costs for correcting deficiencies identified in the trunk sewers and pump stations. Assumptions: • Capacity evaluations and pipeline sizing will be based on up to three land use scenarios: • Existing land use with existing backbone sewer to golf course • County land use zoning at build-out • City General Plan land use development. • Fee estimate assumes that the difference between the three land use scenarios will be pipeline sizing; no changes in alignment or construction techniques is anticipated. • Sewer system will be evaluated using a static hydraulic model based on the InfoWorks ICM modeling engine.Although the model engine is capable of dynamic modeling,only static peak flows will be modeled. • Pipe invert information for existing sewers south of and at Sunol Blvd.will be based on City GIS data.Slope for new sewers will be based on minimum slopes for scouring velocities or 5 feet of cover. • Ground elevations will be based on the City's 5 foot ground contour data. • Base wastewater generation rates will use City standard criteria and assumptions or typical assumptions and criteria used by nearby agencies. • Dry weather and wet weather peaking factors will use either City standard criteria, criteria used in the City's previous master plan,or typical factors used by nearby agencies. • No new lift stations will be required. • Open cut construction will be suitable for all new pipelines. • Costs will be estimated for trunk facilities only;construction and connection of lower laterals will not be included. 2