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Home My WebLink About13.b. Committee Minutes-Engineering & Operations 10-02-2024Page 1 of 5 Item 13.b. 110ENTRAL SAN October 17, 2024 FROM: KATIE YOUNG, SECRETARYOF THE DISTRICT SUBJECT: OCTOBER 2, 2024 - ENGINEERING & OPERATIONS COMMITTEE - CHAIR MCGIILL AND MEMBER WEDINGTON Attached are minutes of the above Committee meeting. ATTACHMENTS: 1. Engineering & Operations Committee minutes 10-02-24 October 17, 2024 Regular Board Meeting Agenda Packet - Page 205 of 209 LCENTRAL SAN REGULAR MEETING OF THE CENTRAL CONTRA COSTA SANITARY DISTRICT ENGINEERING & OPERATIONS COMMITTEE MINUTES Wednesday, October 2, 2024 8:30 a.m. ('nmmittPP Chair Mike McGill Member Florence Wedington Guests: Paul Cassinelli, C. Overaa & Co. (left after Item 3.b.) Michelle Novotny, EPC Consultants, Inc. Staff. Roger S. Bailey, General Manager Katie Young, Secretary of the District Greg Norby, Deputy GM — Engineering & Operations Philip Leiber, Deputy GM — Administration Danea Gemmell, Planning & Development Services Division Manager Edgar Lopez, Capital Projects Division Manager Nitin Goel, Optimization Manager Paul Seitz, Collection Systems Operations Division Manager Nate Morales, Senior Engineer (left after Item 3.b.) Thomas Brightbill, Senior Engineer Cassidy Butler, Assistant Engineer (left after Item 3.b.) Stacey Durocher, Administrative Services Assistant 1. Call Meeting to Order Chair McGill called the meeting to order at 8:31 a.m. 2. Public Comments None. October 17, 2024 Regular Board Meeting Agenda Packet - Page 206 of 209 Page 2 of 5 BOARD OF DIRECTORS: MARIAHN LAURITZEN President MICHAEL R. MCGILL President Pro Tem BARBARA D.HOCKETT TAD J PILECKI FLORENCE T WEDINGTON PHONE: (925) 228-9500 FAX.- (925) 372-0192 www.centralsan.org Page 3 of 5 Engineering & Operations Committee Minutes October 2, 2024 Page 2 3. Items for Committee Recommendation to Board a. Review draft Position Paper to award a construction contract in the amount of $1,056,565 to Telstar Instruments, the lowest responsive and responsible bidder, for the Plant Control System Input and Output (1/0) Replacement, Phase 3 - Pump and Blower Building, District Project 100057; and consider the project exempt from the California Environmental Quality Act (CEQA) Mr. Morales provided a detailed overview of the presentation included in the agenda materials. He explained that the wastewater treatment plant relies on programmable logic controllers (PLC) 1/0 cards, and 40 percent of which are outdated and unsupported. This project will replace all obsolete cards in the Pump and Blower Building. Additional upgrades will include a new 1,000 horsepower variable frequency drive (VFD) for the final effluent pump 3 as well as other control systems in the Pump and Blower Building. The total estimated project cost is $1,964,000, and is funded within the Fiscal Year 2024-25 Budget, including a 30 percent contingency due to competitive pricing and unforeseen conditions. In response to Member Wedington's question regarding the 30 percent contingency, Mr. Lopez stated that the typical contingency for renovation projects is 15 percent, however in this case staff recommends a higher value since the low bid came in significantly lower than the engineer's estimate. The higher percentage does not indicate that staff thinks there's anything unusual or has the potential for problems. There is adequate budget, and the Board has been supportive with using higher percentages on a case-by-case basis in the past. if the budget isn't used, it would be returned to the program. There were no public comments. COMMITTEE ACTION: Recommended Board approval. b. Review draft Position Paper to award a construction contract in the amount of $2,342,000 to C. Overaa & Co., the lowest responsive and responsible bidder for the Steam Renovations, Phase 1A, District Project 100032; authorize the General Manager to amend a professional engineering services (PES) agreement with HDR Engineering, Inc. in an amount of $200,000 for engineering services during construction; amend a PES agreement with MWH Constructors, Inc. in an amount of $300,000 for construction management services; and consider the project exempt from the California Environmental Quality Act (CEQA) October 17, 2024 Regular Board Meeting Agenda Packet - Page 207 of 209 Page 4 of 5 Engineering & Operations Committee Minutes October 2, 2024 Page 3 Mr. Lopez provided an overview of the presentation included in the agenda materials. This project was split into two phases: 1A (focusing on the Pump & Blower Building) and 1B (in the Solids Conditioning Building). Phase 1A includes relocating pipelines, replacing waste steam heat exchangers, and rehabilitating corroded condensers. He explained to the Committee that the steam system is crucial for energy recovery, and while it has significant life remaining, safety improvements are necessary. In response to Member Wedington's question about whether construction management (CM) was normally done in house and if there was a staffing problem, Mr. Lopez stated that the original plans were to perform the CM in-house but was changed after the bid to be more efficient and reduce time needed for Operations. The engineering staff will be reassigned to other projects in the program. There were no public comments. COMMITTEE ACTION: Recommended Board approval. C. Review draft Position Paper to authorize the General Manager to execute a construction contract change order in the amount not to exceed $800,000 with C. Overaa & Co. for additional work for the sludge blending tank under the Solids Handling Facility Improvements, Phase 1A, District Project 7348 Mr. Lopez provided an overview of the presentation included in the agenda materials. He stated that the tank's interior was inspected, revealing that most of the original coal tar epoxy coating was missing. Staff recommends sandblasting and re -coating the tank walls with epoxy while the cover is off to improve resistance to hydrogen sulfide. Additionally, there is some carbide lime buildup in the piping that will require immediate cleaning to prevent flow issues and potential pump failures. Both the coating and cleaning work, though not originally included in the contract, are within the project scope and are estimated to cost up to $800,000. Member Wedington asked if the coating was tar. Mr. Lopez stated that the new coating will not be tar and consists of a more modern product to provide better resistance to hydrogen sulfide. In response to Member Wedington's question about the frequency of cleaning the pipes, Mr. Lopez stated cleaning occurs every five to seven years but there are indicators to clean sooner if problems are detected. There were no public comments. COMMITTEE ACTION: Recommended Board approval. October 17, 2024 Regular Board Meeting Agenda Packet - Page 208 of 209 Page 5 of 5 Engineering & Operations Committee Minutes October 2, 2024 Page 4 4. Other Items a. Receive presentation of the annual Capital Improvement Program Review for Fiscal Year (FY) 2023-24 Mr. Norby provided a detailed overview of the presentation included in the agenda materials. He explained that providing a structured look back will be helpful in accessing how the Capital program is doing by receiving feedback on an annual basis. A discussion ensued regarding staff attrition within the next five years. Member Wedington emphasized that staff is vital to the District's success and planning for knowledge transfer is very important. Mr. Lopez provided an overview of the past fiscal year projects. He discussed the challenges that staff encountered, and the lessons learned. The Committee thanked staff and had no further questions. There were no public comments. COMMITTEE ACTION: Received presentation and provided input to staff. 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 None. COMMITTEE ACTION: Received the list and provided input to staff. 7. Future Scheduled Meetings Wednesday, November 6, 2024 at 8:30 a.m. Wednesday, December 4, 2024 at 8:30 a.m. 2025 Committee Schedule TBD 8. Adjournment — at 10:15 a.m. October 17, 2024 Regular Board Meeting Agenda Packet - Page 209 of 209