Travis AFB Sustainability Study Report Final Background Report

Water Quality / Quantity (WQQ) redundancy for its water supply in the event of an emergency or disaster. If this is further explored in the future, Travis AFB should work with its existing water service provider to assess capacity to support future redundancies. Water quality / quantity concerns include the assurance that adequate water supplies of good quality are available for use by the installation and surrounding communities as the area develops. Water supply for agriculture and industrial use is also considered. The 2011 Travis AFB Water Study recommended that the Base privatize its water system and depend on groundwater from the wells at the golf course. However, the Sustainable Groundwater Management Act was passed in 2014 and Groundwater Sustainability Agencies were formed to help protect groundwater sources. The Act requires medium‐ and high‐priority groundwater basins in California to be managed by local agencies that have formed a Groundwater Sustainability Agency (GSA) by June 30, 2017. Once formed, a GSA must develop and implement a Groundwater Sustainability Plan by January 31, 2022 to guide the sustainable management of its groundwater basin. With these policies in place, groundwater use at the Base may be limited, and is not considered a viable source to provide reliable water to the Base. Key Terms Groundwater. Groundwater is water held underground in the soil or in pores and crevices in rock. Travis AFB water supply ISSUE WQQ‐1 Ensure Travis AFB continues to have a secure and reliable water supply, including multiple supply sources. Compatibility Assessment The City of Vallejo is the primary water service provider for Travis AFB, supplying about 90 percent of the water for the Base, which is sourced from Lake Berryessa and Barker Slough. The water is supplied through contract between Vallejo and Travis AFB that has been in place for several decades. The other 10 percent of the Base’s water comes from five wells on Cypress Lakes Golf Course, north of the Base near Vacaville. These wells draw from the Tehama aquifer, which is limited, due to damage caused by over‐drafting in the past. Because of this damage, water drawn from the aquifer is regulated to ensure no further damage occurs. Since California is prone to drought, it is important that Travis AFB has a consistent water supply for the future, which is provided by Vallejo. Vallejo supplies water to Travis AFB that is treated at an on‐site facility on the Base. This provides additional security for a quality water supply for the Base; however, during the TSS process, it was mentioned that the Base would like to ensure a TSS Background Report Travis AFB Water Treatment Plant Page 5‐127

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