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(Action Item No.2) State Water Project Metropolitan will work with other SWP contractors, and the California Urban Water Agencies to encourage DWR to engage in operational practices which support Metropolitans salinity management objectives including: I:J DWR to develop the capability to provide timely water quality information to aid Metropolitan's operational decisions related to achieving its 500 to 550 mgIL salinity objectives. I:J DWR to develop a TDS assessment methodology to provide routine salinity forecasts, and to assess actions that may affect source or delivered water quality. I:J DWR and Metropolitan to seek mitigation offsets for new projects that would significantly degrade source or delivered water quality. I:J Metropolitan to encourage DWR to assess the tradeoffs of projects affecting SWP salinity including economic impacts. I:J Metropolitan to promote inclusion of salinity control and reduction as a major objective for Delta exports through the AgriculturelUrban facilitation process to develop a long-term Bay-Delta solution under CALFED. I:J DWR and Metropolitan operational planning to take into account the benefit of providing sufficient cycling and flow-through water in DWR Southern Reservoirs to . maintain lower salinity levels. USBR/MWD SALINITY MANAGEMENT STUDY FINAL REPORT W Cf_ t..:> W DISTRIBUTION SYSTEM SALINITY MANAGEMENT ACTIONS (Action Item No.3) Blending Metropolitans interim policy provides an average salinity concentration of 500 to 550 mgIL in its blended water from its Weymouth, Diemer, and Skinner filtration plants and the untreated San Diego pipelines. Metropolitan will also operate its new Eastside Reservoir with the objective of maintaining a salinity level within the reservoir of 500 to 500 mgIL as soon as practical after the initial fill. Achievement of the above salinity targets are subject to the following constraints: I:J An annually budgeted amount to cover additional operational cost, I:J Compliance with all water quality standards and significant aesthetic parameters, I:J Availability of sufficient SWP water to accomplish the blend without invoking transfers or withdrawal from special storage accounts, and I:J Adequate distribution system delivery capacity. BOOKMAN-EDMONSTON ENGINEERING, INC. 5-2 0; ILOCALRESIANDYS'lSALTNITYVUNE19981SECTION5.DOC Last printed 07120/98 11.'1 I AM Section 5 Proposed Action Plan .