MINUTES OF THE SPECIAL MEETING

OF THE BOARD OF DIRECTORS OF THE

CASTRO VALLEY SANITARY DISTRICT

HELD ON DECEMBER 06,2018

[1. Call to Order, Roll Call, and Pledge of Allegiance.}

The special meeting of the Board of Directors of the Castro Valley Sanitary District (CVSan) and the Board of Directors of the Oro Lorna Sanitary District (OLSD) was called to order by CVSan's President McGowan at 6:34 p.m. Thursday, December 06, 2018 at CVSan's main office, located at 21040 Marshall Street. The Pledge of Allegiance was led by President McGowan.

ROLL CALL

PRESENT: DIRECTORS Daniel Akagi, Melody Appleton, Ralph Johnson, Timothy McGowan, Dave Sadoff, Shelia Young, Dan Walters, Rita Duncan, Timothy Becker, Bob Glaze.

ABSENT: DIRECTOR None

LATE: DIRECTOR None

Others in attendance: Roland P. Williams, Jr., General Manager (GM) Michael O'Toole, Legal Counsel Jason Warner, OLSD General Manager (OLSD GM) Bill Halsted, OLSD District Engineer Jimmy Dang, OLSD Technical Services Manager- Plant Patricia Schofield, OLSD Recording Secretary Peter McGaw, OLSD Legal Counsel Mark Myers, Cal Engineering & Geology, Inc. (CE&G) Principal Engineer Fred Simon, Member of the Public/OLSD Board Member- Elect

[2. Items from the Public.}

There were no items from the public.

[3. Presentation from Cal Engineering & Geology, Inc. related to the Equalization Basin Expansion.}

CVSan President McGowan invited CE&G Principal Engineer Myers to give his presentation. Myers introduced the WWTP Wet Weather Equalization Basin Expansion concept, noting that CE&G had worked on the Wet Weather Equalization & Ecotone Demonstration Project to prepare preliminary and final design reports and provide geotechnical design analyses; He stated that the existing equalization basin provides about 8 MGD of storage, and that benefits of the facility included water quality/treatment improvements and reduced discharge and discharge cost through EBDA.

Myers stated that CE&G evaluated alternatives for expanding the basin capacity, with the primary goals being to capitalize on features of the existing basin, fit the project within the existing equalization basin footprint, and understand the hydraulic and geotechnical/geologic considerations.

Features of the proposed vertical expansion included ground modification-soil cement to stabilize young bay mud to function as a gravity retaining wall, sheet piles to increase the containment height, excavation of overburden materials, and installations of an inlet/outlet structure, a pump station, and emergency overflow improvements. Myers ended the presentation by explaining that the project would be completed using existing improvements in the following five steps:

1. Install Ground Improvement 2. Install Sheet Piles 3. Treat Soil with Cement 4. Excavate Basin 5. Install Block Facing

President McGowan thanked Myers for the presentation, and invited the Boards to ask questions regarding t.he project.

CVSan Member Johnson asked whether the expansion would cause the basin to fall under the jurisdiction of the Division of Safety of Dams. Myers responded that it likely would not because the basin is below sea level. OLSD GM Warner stated that staff would confirm the answer and report back.

CVSan President McGowan asked what would be done with the water level during dry seasons. Myers responded that there would likely be water in the basin at all times, and the basin would be emptied before wet weather storms. McGowan also asked what the material and longevity of the sheet piles for the proj~ct would be. Myers responded that the sheet piles are made of steel with a sealant to make them water tight, and the average longevity is 50 years. McGowan also inquired whether the horizontal levee would be maintained with water. OLSD GM Warner responded that flow would continue to be sent to the horizontal levee, which would become easier to maintain with better treatment. McGowan reiterated the importance of keeping dam restrictions in consideration during the design process. OLSD GM Warner stated that staff would confirm the status before moving forward.

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CVSan Member Sadoff asked whether there would be a guideline of restrictions for when the basin fills to protect the side walls. Myers responded that he would confirm the operational needs and design the side walls accordingly.

[4. Adjournment to Closed Session (one item). (The Board may adjourn to Closed Session in accordance with Government Code Section 54956.9(b) to confer with, or receive advice from, legal counsel regarding anticipated litigation (CVSan and OLSD vs. EBDA).)J

A motion was made to convene to closed session at 7:37 p.m. by CVSan Member Appleton. The motion was seconded by OLSD Director Duncan and passed on a 10-0 vote.

A. Reconvene to open meeting and report on any action taken in Closed Session.

A motion was made to reconvene to open meeting at 8:52 p.m. by OLSD Director Duncan. The motion was seconded by CVSan Member Sadoff and passed on a 1 0 - 0 vote.

CVSan President McGowan reported that the Board received advice from legal counsel and no action was taken.

[5. East Bay Dischargers Authority (EBDA) Negotiations.]

OLSD GM Warner requested a $200,000 budget to develop the Wet Weather Basin Expansion Project. CVSan President McGowan responded that, because it was not on this agenda, an item to approve CVSan's 35% share of the requested amount would be added to the next CVSan Board Meeting agenda.

OLSD Board Member-Elect Simon stated that it is important for the Districts to maintain the ability to provide recycled water in the future, and to keep that in mind during plant improvement designs.

[6. Miscellaneous Comments from Board Members and Staff.}

OLSD Director Becker stated that this would be his last joint meeting with CVSan for the near future, and that he had enjoyed working with CVSan.

OLSD Board and staff thanked CVSan for their hospitality in hosting the meeting and said that they enjoyed working together.

CVSan Board and staff thanked OLSD for coming to CVSan and stated that they enjoyed the productive collaborations between the districts.

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[7. Adjournment of Meeting.]

There being no further business to come before the Board, a motion was made by CVSan Member Akagi to adjourn the meeting at 9:04p.m. The motion was seconded by CVSan Member Johnson and passed on a 1 0 - 0 vote.

Respectfully submitted,

Dave Sadoff, Secretary of the Sanitary Board

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