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2015 URBAN WATER MANAGEMENT PLAN <br />based on discussions with OCWD a conservative BPP of 70 percent is assumed through 2040. Principles <br />of this policy include: <br />• OCWD's goal is to achieve a stable 75 percent BPP, while maintaining the same process of setting <br />the BPP on an annual basis, with the BPP set in April of each year after a public hearing has been <br />held and based upon the public hearing testimony, presented data, and reports provided at that time. <br />• OCWD would endeavor to transition to the 75 percent BPP between 2013 and 2015 as construction <br />of the GWRS Initial Expansion Project is completed. This expansion will provide an additional 31,000 <br />AFY of water for recharging the groundwater basin. <br />• OCWD must manage the OC Basin in a sustainable manner for future generations. The BPP will be <br />reduced if future conditions warrant the change. <br />• Each project and program to achieve the 75 percent BPP goal will be reviewed individually and <br />assessed for their economic viability. <br />The OC Basin's storage levels would be managed in accordance to the 75 percent BPP policy. It is <br />presumed that the BPP will not decrease as long as the storage levels are between 100,000 and 300,000 <br />AF from full capacity. If the OC Basin is less than 100,000 AF below full capacity, the BPP will be raised. <br />If the OC Basin is over 350,000 AF below full capacity, additional supplies will be sought after to refill the <br />OC Basin and the BPP will be lowered. <br />The OC Basin is managed to maintain water storage levels of not more than 500,000 AF below full <br />condition to avoid permanent and significant negative or adverse impacts. Operating the OC Basin in this <br />manner enables OCWD to encourage reduced pumping during wet years when surface water supplies <br />are plentiful and increase pumping during dry years to provide additional local water supplies during <br />droughts. <br />OCWD determines the optimum level of storage for the following year when it sets the BPP each year. <br />Factors that affect this determination include the current storage level, regional water availability, and <br />hydrologic conditions. When the OC Basin's storage approaches the lower end of the operating range, <br />immediate issues that must be addressed include seawater intrusion, increased risk of land subsidence, <br />and potential for shallow wells to become inoperable due to lower water levels (OCWD, Groundwater <br />Management Plan 2015 Update, June 2015). <br />3.3.2.2 OCWD Engineer's Report <br />The OCWD Engineer's Report reports on the groundwater conditions and investigates information related <br />to water supply and OC Basin usage within OCWD's service area. <br />The overall BPP achieved in the 2013 to 2014 water year within OCWD for non -irrigation use was 75.2 <br />percent. However, a BPP level above 75 percent may be difficult to achieve. Therefore, a BPP ranging <br />from 65 percent to 70 percent is currently being proposed for the ensuing FY 2015-16. Analysis of the OC <br />Basin's projected accumulated overdraft, the available supplies to the OC Basin (assuming average <br />hydrology) and the projected pumping demands indicate that this level of pumping can be sustained for <br />2015-16 without harming the OC Basin. <br />amadis.com fli4k 3-11 <br />