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<br />C-42 | City of Pleasanton Housing Constraints <br />While potential opposition to affordable housing exists in many communities throughout the Bay <br />Area, Pleasanton has implemented standards for high density sites and a development review <br />process to involve appropriate decision makers and stakeholders to reduce the likelihood of <br />project opposition. The City continues to inform the community about state requirements for <br />facilitating housing and works diligently to maintain compliance with ongoing amendments to state <br />law. <br />Section C.4 Environmental and Infrastructure <br />Constraints <br />C.4.1 Environmental Constraints <br />Land to the west and south of the city includes open space, agriculture, and permanently <br />protected ridge lands. Measures PP and QQ were voter approved and prohibit grading on slopes <br />of 20 percent or greater or within 100 vertical feet of a ridgeline. However, parcels are allowed to <br />have at least a minimum of 10 units. <br />Pleasanton’s downtown also include historic character and resources. In 2019, an Environmental <br />Impact Report (EIR) was certified for the Downtown Specific Plan, which includes mitigation <br />measures to protect the historic character of downtown. The City maintains a list of downtown <br />residential structures located in residential zones determined to be historic resources. <br />C.4.2 Infrastructure Constraints <br />Water <br />Water supply is an issue at the forefront of long-term planning efforts in the City. The City’s water <br />supply comes from two sources: approximately 80 percent is supplied by the Zone 7 Water <br />Agency (Zone 7), while the remaining 20 percent comes from three City owned groundwater wells: <br />Wells 5, 6, and 8. Test results from 2019 and 2020 showed elevated levels of per- and <br />polyfluoroalkyl substances (PFAS, chemicals that can contaminate drinking water supplies) at <br />Well 8, which is now inoperative.6 <br />The City is actively exploring several alternative water supply options while the PFAS <br />contamination is being addressed. In September 2020, the City began considering a PFAS and <br />Groundwater Wells Rehabilitation Project to address PFAS contamination and extend the life of <br /> <br /> <br />6 Upon receipt of the test results, the City placed Well 8 on Emergency Standby Status. Well 8 has not operated since <br />the beginning of June 2019 and the City has determined that all groundwater supply wells may be taken out of <br />commission no later than the first quarter of 2023.