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2005 Pleasanton Plan 2025 2.0 Land Use Element 2-11 Adopted 07 21 09 Alameda County, within whose jurisdiction the gravel areas are mostly located, has adopted a specific plan which indicates the extent of harvesting operations and identifies potential future uses suitable for land once its deposits have been extracted.4 The specific plan calls for a resource known as the Chain of Lakes, a series of open sand-and- gravel pits filled with groundwater after the resources have been extracted. The lakes would be used for water recharge and stormwater storage, and the project would include habitat enhancement and recreational trails. Industry has now depleted sand-and-gravel resources and reclaimed land on several large parcels in the Busch Road and El Charro Road area. This area will be the subject of a future specific plan (see following Specific Plan Areas section). The quarry lands create a valuable urban separator between Pleasanton and Livermore. This land should be carefully studied during specific plan preparation, and its qualities as an urban separator should be substantially protected. The lake areas should be restored to a safe and natural condition, and wildlife areas should be regenerated to the fullest extent feasible. The future specific plan should be closely coordinated with affected property owners, the City of Livermore, Zone 7 Water Agency, and Alameda County. Hacienda Business Park This 854-acre business park was originally developed in the early 1980s when the first office and commercial uses were built. The original master plan envisioned “a commercial development designed 4 Alameda County Board of Supervisors, Specific Plan for Livermore-Amador Valley Quarry Area Reclamation, adopted Nov. 5, 1981. to create a cohesive, visually unified business park with a sense of identity, distinction and quality.” In the early 1980s, development activity in Hacienda included primarily one- and two-story tilt-up construction “back office” buildings, and a few “Class A” corporate office buildings. The park also acquired a new hotel development and a retail area at that time. Housing was introduced in the late 1980s in the southern area of the park, and the weakening of the commercial real-estate markets at that time led to the allocation of additional acreage for small-lot single- family homes and additional multifamily residential development. Today there are 1,530 residential units in the park. Roche Molecular Systems building in Hacienda Business Park In 1996 the Pleasanton/Dublin BART line was opened with the terminus station located on the northern edge of the Hacienda Hacienda