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Home My WebLink About16.b. Committee Minutes-Engineering & Operations 05-04-2022 Page 1 of 6 Item 16.b. CENTRALSAN jdf A- hom CENTRAL CONTRA COSTA SANITARY DISTRICT May 26, 2022 TO: HONORABLE BOARD OF DIRECTORS FROM: KATIE YOUNG, SECRETARYOF THE DISTRICT SUBJECT: MAY4, 2022 - ENGINEERING & OPERATIONS COMMITTEE - CHAIR LAURITZEN AND MEMBER HOCKETT Attached are minutes of the above Committee meeting. ATTACHMENTS: 1. Minutes of 05-04-22 meeting May 26, 2022 Special Board Meeting Agenda Packet- Page 517 of 532 Page 2 of 6 CENTRAL SAN CENTRAL CONTRA COSTA SANITARY DISTRICT 5019 IMHOFF PLACE, MARTINEZ, CA 9A553-4392 REGULAR MEETING OF THE BOARD oFDIRECTORWILLIAM DAVID R. WILLIAMS CENTRAL CONTRA COSTA Preen` SANITARY DISTRICT BARBARA D.H°CKETT President Pro Tem ENGINEERING & OPERATIONS MARIAHN.LAURITZEN COMMITTEE MICHAEL R.MCGHL TAD J PILECKI MINUTES PHONE: (925)228-9500 FAX.- (925)372-0192 Wednesday, May 4, 2022 www.centralsan.org 11:00 a.m. (All attendees participated via videoconference) Committee: Chair Mariah Lauritzen Member Barbara Hockett Staff.- Roger S. Bailey, General Manager Katie Young, Secretary of the District Steve McDonald, Director of Operations (joined during Item 4.c.) Edgar Lopez, Capital Projects Division Manager Amelia Berumen, Assistant to the Secretary of the District 1. Notice This meeting was conducted virtually in accordance with the provisions stipulated in Assembly Bill 361 and adopted by the Central San Board of Directors on April 7, 2022. The agenda included instructions for options in which the public could participate in the meeting. 2. Call Meeting to Order Chair Lauritzen called the meeting to order at 11:00 a.m. 3. Public Comments No public comments. May 26, 2022 Special Board Meeting Agenda Packet- Page 518 of 532 Page 3 of 6 Engineering & Operations Committee Minutes May 4, 2022 Page 2 4. Items for Committee Recommendation to Board a. Review draft Position Paper to award a construction contract in the amount of $444,000 to Power Engineering Construction Company, the lowest responsive and responsible bidder for the Outfall Monitoring Improvements, District Project 100018 Using the location map provided as Attachment lb as a guide, Mr. Lopez provided an informative overview of the Outfall pipeline; the recently completed and regulatory required Outfall Improvements project; and the clay soil challenges that surround the Outfall pipe. He explained the recent improvement project included an internal inspection of the pipeline. Monitoring is a permit condition on the Outfall and inclinometers had been installed throughout the years. The existing clay soil or Bay mud tends to expand during wet conditions and contract severely during drought years. As such, the pipe can move and inclinometers are used to track settlement or movement. Mr. Lopez also mentioned the history of relocating a portion of the Outfall due to the landfill and showed the location, a shift in alignment, on the location map. The prior improvements project was deadline driven and many permitting agencies were involved; the pandemic impacted any revision of necessary permits. Thus, this portion of work for monitoring installment was repackaged from that initial project for bid. The work is specialized and although outreach was undertaken, only one bid was received. The bid was slightly over the engineer's estimate; however, the cost difference was attributed to an increase in price of the inclinometers. Staff recommends proceeding with award as there would be no advantage to rebid the work. Additionally, the contractor is familiar with the project location and infrastructure. There is significant and available contingency budget in the program to transfer to the project that is within the General Manager's Authority. The Committee had no questions or concerns. COMMITTEE ACTION: Recommended Board approval. b. Review draft Position Paper to award a construction contract in the amount of $3,762,825 to Devaney Engineering, Inc., the lowest responsive and responsible bidder for the Danville Sewer Renovations, Phase 4, District Project 8466; include an alternative bid item in the amount of$250,000 to construct an interceptor structure; and find that the Project is exempt from the California Environmental Quality Act May 26, 2022 Special Board Meeting Agenda Packet- Page 519 of 532 Page 4 of 6 Engineering & Operations Committee Minutes May 4, 2022 Page 3 Mr. Lopez reviewed the information provided in the draft Position Paper in detail. As described, Devaney Engineering, Inc. is a new contractor to Central San by name, but not by prior contractor staff experience. The bid was thoroughly reviewed, below the engineer's estimate and well in order. Additionally, as part of the bid, an alternative bid item was included to address recurrent challenges encountered by the Collection System Operations (CSO) staff to clean and flush a 42-inch interceptor and siphon. Staff designed a grit-trap that would be installed before sewage enters the siphon, and the pricing received from Devaney was good and within budget. Therefore, staff recommends to also award the alternative bid item in addition to the project scope. In regard to a question posed by Member Hockett as to what may be contributing to the debris floating into the interceptor encountered upstream, Mr. Lopez explained that solids and grit tend to build up when low flows are encountered. Seasonal changes and weather can contribute to the challenges of low flows within a large sized pipe, which require higher flows to flush grit and solids settlement. Based on Central San's design criteria, pipes are required to be able to handle wet weather conditions. Thus, larger pipelines can retain more sediment during long periods of low flow and is especially more the case for siphons that can trap settlement until higher flows are present. The new structure will help CSO significantly in removing settlement before reaching the siphon. COMMITTEE ACTION: Recommended Board approval. c Review draft Position Paper to award a construction contract in the amount of$1,333,333 to Vellutini Corporation, dba Royal Electric Company, the lowest responsive and responsible bidder for the San Ramon Electrical Upgrades, District Project 100017; and find that the Project is exempt from the California Environmental Quality Act Another new contractor to Central San, Mr. Lopez explained Royal Electric is well known in the Sacramento area in the commercial industry, and includes a group focused on industrial/public works/municipality type work. Staff completed a thorough review and reference check and found that all submittals were in order. Mr. Lopez stated this was another difficult project to estimate with the supply challenges being faced and availability of electrical equipment. However, the project received good competition and even with cost challenges, he commended staff for receiving a good response and estimating the work close to the low bid. Other bids in the Bay Area have been far worse. As for the cost difference between the engineer's estimate and low bid, the electrical equipment increase was the difference factor. May 26, 2022 Special Board Meeting Agenda Packet- Page 520 of 532 Page 5 of 6 Engineering & Operations Committee Minutes May 4, 2022 Page 4 In preparation for two other pump station improvement projects that will also bid this year, Mr. Lopez advised the Committee that staff recently conducted a complete Request for Proposal process for construction management and support. The consultant would manage three like construction projects, some which have specialty work, namely in the electrical discipline. The specialty work and multiple projects cannot be managed by staff alone. From that process, Carollo Engineers was selected. Mr. Lopez stated a request to authorize an agreement with Carollo will be brought forth at a future time. For now, staff will manage this project until such time the other projects are awarded and will require Carollo's assistance to proceed forward. Member Hockett inquired if this work was in regard to the Malty Pump Station that needed additional land. Mr. Lopez replied yes, and stated the agreement to purchase land from the adjacent parcel for work at that particular pump station had been recently executed, and the Fairview Pump Station location also has a land swap that is close to being signed. COMMITTEE ACTION: Recommended Board approval. 5. Other Items a. Receive Capital Projects Division Quarterly Report (January to March) on capital projects, active consultant contracts, change order log, and schedule of bids and awards In regard to the future Bids and Awards report, Mr. Lopez explained the engineer's estimate fields were intentionally left blank while staff reevaluates project estimates based on current impacts that have been experienced of late with equipment and supply challenges. COMMITTEE ACTION: Received the update. 6. Announcements None. 7. 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. May 26, 2022 Special Board Meeting Agenda Packet- Page 521 of 532 Page 6 of 6 Engineering & Operations Committee Minutes May 4, 2022 Page 5 8. Future Scheduled Meetings Wednesday, May 11, 2022 at 11:00 a.m. Wednesday, June 1, 2022 at 11:00 a.m. Wednesday, June 22, 2022 at 11:00 a.m. 9. Adjournment— at 11:28 a.m. May 26, 2022 Special Board Meeting Agenda Packet- Page 522 of 532