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f. A ' Mitigation Measure j None required. Impact PS-3: Increased Potential for Hazardous Material Spills F" Expansion of the airport and associated development would result in the increased storage and use of hazardous materials at the project site, which would result in the increased potential for hazardous materials spills to occur. However, any business that uses or stores hazardous materials ' on the airport property would be required to file a Hazardous Materials Management Plan with the Office of Emergency Services. Also, the MFD and the San Joaquin County Offices of Emergency Service typically respond to hazardous materials spills (Reinard W. Brandley, Consulting Airport Engineer 1997). The use and storage of hazardous materials on the project site could be slightly greater under 2015 proposed project conditions with Phase 2 interchange improvements than under Phase 1 because,under Phase 2, additional land would be developed in urbanized uses. However, because the use of hazardous materials at the project site would be regulated, the proposed project is not F expected to pose a hazard to people, plants, or animals under either phase. Therefore, this impact is considered less than significant under both Phases 1 and 2 interchange conditions. �i Mitigation Measure None required. Impact PS-4: Increased Demand for Water The proposed project would result in a total demand (including the existing demand) for 801,300 gallons per day (gpd) of water under 2015 conditions with the Phase 1 interchange improvements and 867,500 gpd under project conditions with Phase 2 improvements. Under the terms of the Southern Water System Operation & Maintenance (SWSO" agreement ratified by the City of Stockton and the County in June 1989 and amended in June 1992, The the City of Stockton . } has eentraeted with the airport to will provide up to 1.4 million gpd for anticipated future development of the airport. To meet the demands of the project, the City has initiated an update to the South Stockton Water System Master Plan. It is anticipated that at least one new well in the project area and construction of the South Stockton Aqueduct from the Stockton East Water District treatment plant will be required to meet the demands of the proposed project. Adoption and implementation of the water system master plan will ensure that water can be provided and that { ; potential adverse impacts related to salinity intrusion and movement of the contaminated Stockton Metropolitan Airport Project Chapter!0. Public Services and Utilities Draft Environmental Impact Report 10-6 March 20, 1998