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1839662v3 Page 3 <br />remainder of the statement stands on its own. We recommend modifying or deleting <br />this statement. <br />x Page 3.15-37, Water Supply and Groundwater Contamination: The DEIR states, <br />“Discussion between Zone 7 and the City have taken place with the option of Zone 7 <br />providing 100 percent of all water supply, both in the near term and in the future.” <br />This statement should be updated to reflect that discussion between Zone 7 and the <br />City have taken place with Zone 7 agreeing to 1) meet the City’s 100% water supply <br />in the near-term and 2) explore the option of Zone 7 providing 100% of all water <br />supply in the long-term <br />3. Environmental Setting & Water Supply Systems <br />Sections 3.9 (“Environmental Setting”) and 3.15 (“Utilities and Service Systems”) contain a <br />number of factual statements that may require correction or clarification. We offer the <br />following comments for your consideration: <br />x Page 3.9-1, Watershed: this section should be updated to reflect the following: <br />The Alameda County Flood Control and Water Conservation District Zone 7 (Zone <br />7) is responsible for providing regional flood protection to the Livermore-Amador <br />Valley, and is the water wholesale agency supporting four water retailers in the <br />valley - City of Pleasanton, City of Livermore, Cal Water, and DSRSD. <br />x Page 3.9-2, Arroyo del Valle: Arroyo del Valle originates upstream of the <br />Reservoir, and is channelized in the lower reach of Pleasanton. <br />x Page 3.9-2, Chain of Lakes: The Chain of Lakes is a future scenario; as certain <br />former gravel pits are transitioned from their current ownership to Zone 7 (over <br />a period of years to decades), the lakes could be connected into “chain” and <br />used as part of Zone 7’s broader water supply and flood control operations. That <br />plan is not fully operational at this stage. In addition, water from Arroyo Mocho is <br />not currently being released into any of the lakes. A diversion structure is being <br />considered, but has not advanced past a conceptual design phase. <br />x Page 3.15-2, Potable Water Source and Supply:These statistics should be <br />updated. Approximately 90% of Zone 7’s water supply is from the State Water <br />Project, which is delivered via the South Bay Aqueduct. The remaining 10% is <br />local rainfall captured in Lake Del Valle. <br />=RQH <br />3DJHRI <br /> <br />&217 <br /> <br />