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HomeMy WebLinkAboutEngineering & Operations MINUTES 09-17-19 Page 2 of 5 � CENTRAL SAN CENTRAL CONTRA COSTA SANITARY DISTRICT 5019 IMHOFF PLACE, MARTINEZ, CA 9AS53-4392 REGULAR MEETING OF THE BOARD OF DIRECTORS: CENTRAL CONTRA COSTA DAVID R, WILLIAMS President SANITARY DISTRICT MICHAEL R.MCGILL President Pro Tem ENGINEERING & OPERATIONS CAUSEY COMMITTEE PAULA. JAMES A.NEJEDLY TAD J.PILECKI MINUTES PHONE: (925)228-9500 TAX- (925)372-0192 www.centralsaii.org Tuesday, September 17, 2019 2:00 p.m. 21d Floor Conference Room 5019 Imhoff Place Martinez, California Committee: Chair Jim Nejedly Member Tad Pilecki Guest: Steve Hyland, Stantec Consulting Services, Inc. (left after Item 3.a.) Staff. Roger S. Bailey, General Manager Katie Young, Secretary of the District Ann Sasaki, Deputy General Manager Jean-Marc Petit, Director of Engineering and Technical Services Melody LaBella, Resource Recovery Program Manager (left after Item 3.a.) Edgar Lopez, Capital Projects Division Manager Alan Weer, Plant Operations Division Manager (left after Item 3.a.) Sasha Mestetsky, Senior Engineer Craig Mizutani, Senior Engineer (left after Item 3.a.) Chathu Abeyrathna, Associate Engineer (arrived during and left after Item 3.a.) Sean Sullivan, Electrical Shop Supervisor (left after Item 3.a.) Adib Musawwir, Electrical Technician (left after Item 3.a.) Amelia Berumen, Senior Administrative Technician 1. Call Meeting to Order Chair Nejedly called the meeting to order at 2:00 p.m. October 3, 2019 Regular Board Meeting Agenda Packet- Page 235 of 263 Page 3 of 5 Engineering & Operations Committee Minutes September 17, 2019 Page 2 2. Public Comments No public comments. 3. Items for Committee Recommendation to Board a. Review draft Position Paper to authorize the General Manager to amend an existing professional engineering services agreement with Stantec Consulting Services, Inc. to increase the agreement ceiling from $1,540,000 to $3,078,000 for final design of the Filter Plant and Clearwell Improvements — Phase 1A, District Project 7361 Mr. Petit introduced consultant project engineer Mr. Steve Hyland and the staff project team in attendance, then proceeded with the presentation provided with the agenda materials. Staff answered various questions pertaining to potential impacts of pending interagency projects and the timing of such coordination. It was asked whether the current recycled water system could be used if the Concord Community Reuse Project (CCRP) were to proceed before the Water Exchange Project, or if the system would need to be switched over to accommodate the latter project needs sooner. Mr. Petit said Central San probably has enough recycled water capacity to meet the initial CCRP needs, but other improvements would be needed, additionally, he estimates the Concord project to be another five years out, based on the latest update. Regardless of the pending projects, the Phase 1A project elements are considered critical items to be remedied in the immediate future for reliability. Member Pilecki inquired why the Pleasant Hill schools were not listed as recycled water recipients on Slide 12. Mr. Lopez replied that the list is a sample representation and is not inclusive of all Zone 1 customers. Mr. Petit explained the three main Phase 1A project components: electrical system; storage and delivery; and filter production in detail. As staff discussed the deteriorated liner in the east Clearwell cell, as shown in the photo on Slide 21, Member Pilecki inquired whether, with the decommissioned east cell, staff had a contingency plan should the recently recommissioned west cell also fail. Mr. Petit replied that if such a failure were to occur, temporary pumping and piping would likely need to be installed by an outside contractor, another option could be to store filtered water in the forebay and pump over to the distribution system, which would be expensive. He stated that should an event occur, staff would take proper measures to repair and continue production and October 3, 2019 Regular Board Meeting Agenda Packet- Page 236 of 263 Page 4 of 5 Engineering & Operations Committee Minutes September 17, 2019 Page 3 delivery services. However, he stressed that time is of the essence to implement a storage solution soon. The business case evaluation summary for recycled water storage (Slide 24) brought much discussion of the decision to install steel versus concrete storage tanks. Mr. Petit and Mr. Hyland provided comprehensive explanations for the choice of storage tank type and as it relates to piping and connections, location and soil, and some pros/cons of concrete, including seismic loading and structural integrity. Overall, for the tank size (three million gallons each) and storage need, the welded steel option represented the most cost-effective alternative. The Committee Members requested staff include a cost analysis of evaluating a new concrete tank with partitions when the item is brought to the full Board for consideration. Mr. Hyland provided an in-depth explanation to Member Pilecki's inquiry about the filter replacement due to several issues that have plagued filter production in the past. In summary, he said that rehabilitation of a filter with new, coarser media should help alleviate media disruption in order to reach a sustained operation without batching the filters, and in addition to the proposal of replacing the backwash pumps with variable speed drives to attempt to remove air disruption during treatment. Mr. Petit added another hypothetical alternative not mentioned during the presentation would be to abandon the recycled water facilities and purchase water directly from Contra Costa Water District instead. In rough figures shared, it would still be more cost-effective to continue recycled water production; thus, facility improvements are needed to continue reliable operation. Mr. Bailey added that staff will present a recycled water production cost recovery update to the Board next month. COMMITTEE ACTION: Recommended Board approval with inclusion of a cost analysis of a new concrete storage tank type alternative. 4. Other Items a. Receive report on Fiscal Year 2018-19 Closeout of Capital Improvement Projects Mr. Lopez informed the members that this year the pre-audit year-end status report typically accompanying this presentation will be presented to the Finance Committee instead. He continued with the presentation of completed projects valued over a million dollars; information on projects under that threshold is included in the attachment summaries provided with the agenda materials. He discussed the various, increasing October 3, 2019 Regular Board Meeting Agenda Packet- Page 237 of 263 Page 5 of 5 Engineering & Operations Committee Minutes September 17, 2019 Page 4 challenges the sewer replacement projects are facing and how each project was successfully completed and with the majority under budget. COMMITTEE ACTION: Received the report. 5. Announcements None. 6. Suggestions for Future Agenda Items a. Receive list of upcoming agenda items and provide suggestions for any other future agenda items COMMITTEE ACTION: Received the list. 7. Future Scheduled Meetings Tuesday, October 15, 2019 at 2:00 p.m. Tuesday, November 19, 2019 at 2:00 p.m. Tuesday, December 17, 2019 at 2:00 p.m. 8. Adjournment— at 2:59 p.m. October 3, 2019 Regular Board Meeting Agenda Packet- Page 238 of 263