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Tri-Valley Water Roundtable Discussion Notes Page 2 • Brian Bornstein, City Engineer,San Ramon • Roger Bradley, Assistant to the City Manager, Dublin • Jill Duerig, General Manager, Zone 7 • Darren Greenwood, Public Works Director, Livermore • Dan McIntyre, Engineering Services Manager, DSRSD • Bert Michalczyk, General Manager, DSRSD • Daniel Smith, Operations Services Director, Pleasanton • Nelson Fialho, City Manager, Pleasanton • Marc Roberts, City Manager, Livermore Presentation by Jill Duerig and Darren Greenwood The General Manager of Zone 7,Jill Duerig, and the Livermore Public Works Director, Darren Greenwood, delivered a presentation on the preliminary findings of the water supply evaluation update and the phased study on desalination and indirect potable reuse being conducted by Zone 7. Attachment A includes the slides from this presentation.Workshop participants were invited to provide comments and ask clarifying questions about the presentation. Comments and responses to questions included: • Currently our reliability threshold aims to go below 85% reliability less than 1% of the time. A revised threshold hasn't been agreed upon. • How will the bottom line (cost per acre foot) cited in the study affect retail prices? Response: We expect roughly that every 1% increase in cost of production (per acre foot)for Zone 7 will translate into a 2/3% increase in retail rates, although these are very preliminary numbers. • Are these price increases feasible for the consumer?Response: This is a policy question, but we believe these price increases could be feasible. • Have we engaged in any public outreach yet about indirect potable reuse or desalination options? Response: We think that many people (perhaps 40%) are not familiar with reverse osmosis. • Neighboring agencies such as the East Bay Municipal Utilities District(EBMUD) and the San Francisco Public Utilities Commission have had significant rate increases, sometimes in the double digits.These types of increases may become the norm. • Do we need another portfolio option that drops the Delta fix and the chain of lakes, as these are fairly uncertain and we should factor in the possibility that they could take longer than anticipated? Response: We account for some of that uncertainty in the study's scenarios, although the costs associated with the Delta fix are included in all scenarios, regardless of the completion date. • Have we incorporated 2014 data? If not, can we legitimately ignore 2014 given how big of an impact it has made on the industry?Response:It is difficult for the Department of Water Resources (DWR) to incorporate data quickly;we build risk into our model with our own analysis. The bottom line is that higher levels of reliability comes at a cost. • Can we use more recycled water than what is currently incorporated into the study's portfolio options,because isn't recycled water less expensive than desalination? Response: There is only so much waste water generated that can be recycled. Although this is