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4 plume lume will be avoided. Refer to Impact DW-7 for a discussion of potential g groundwater quality impacts. The osero d project includes connecting new water lines to an existing main water line P p north of the project site at Arch-Airport Road to provide service to the commercial/industrial area and the future terminal area on the north side of the airport. Additionally, total fire flow demand is ` anticipated to be 2,500 gallons per minute (gpm), and all water lines at the project site will be constructed to provide for this volume of water flow (Reinard W. Brandley, Consulting Airport Engineer 1997). Because the City of Stockton has agreed to provide water to the project site and has identified means for doing so and because the project would be designed to provide for projected fire flows, this impact is considered less than significant under both Phases 1 and 2 interchange conditions. . ; Mitigation Measure None required. Impact PS-5: Increased Generation of Wastewater t : The proposed project would result in the total generation of 793,300 gpd of wastewater under 2015 conditions with Phase 1 interchange improvements and 859,500 gpd under project conditions ' with Phase 2 improvements. The airport has arranged for the City of Stockton to handle up to 1.3 million gpd of wastewater generated at the airport. Sewage from the proposed project will be ` treated at the City of Stockton's Regional Wastewater Control Facility (RWCF), located on Navy Drive in southwestern Stockton. The RWCF provides secondary and -tertiary treatment of wastewater, and following treatment, effluent is discharged into the San Joaquin River in accordance with the terms of a National Discharge Elimination System Permit issued by the Central Valley Regional Water Quality Control Board. In the south Stockton sewer service area, the City generally provides sewer capacity to new development through annexation to the South Stockton Community Facilities District (CFD). However, because the airport is exempt from annexation to the CFD, it was necessary for the City and the County to reach an agreement on an equitable connection fee in lieu of the charges for annexation to the CFD. The Stockton City Council adopted the Airport Area In-Lieu Fee for airport sewer connection on July 1, 1996. The County Board of Supervisors approved the fee on July 9, 1996. The Airport Area In-Lieu Fee is composed of a treatment facility portion and a collection system portion. r Stockton's adopted Wastewater Treatment Master Plan points out that certain unit processes ' at the RWCF are approaching their functional capacity. Engineering-Science also points out in its 1992 Secondary Treatment Facilities Expansion Study that the actual wastewater treatment capacity is estimated to be 38 million gallons per day (MGD) of average dry weather flow. The present k Stockton Metropolitan Airport Project Chapter 10. Public Services and Utilities Draft Environmental Impact Report 10-7 March 20, 1998 �f