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Home My WebLink About03.b. Construction Contract to GSE Construction Company, Inc. for Return Activated Sludge (RAS) Piping Renovations; DP 100051Page 1 of 10 Item 3.b. CDr EENI RAL SAN BOARD OF •' �J POSITION PAPER CENTRAL CONTRA COSTA SANITARY DISTRICT � � • MEETING DATE: MARCH 13, 2023 SUBJECT: REVIEW DRAFT POSITION PAPER TO AWARD A CONSTRUCTION CONTRACT IN THE AMOUNT OF $1,283,200 TO GSE CONSTRUCTION COMPANY, INC., THE LOWEST RESPONSIVE AND RESPONSIBLE BIDDER FOR THE RETURN ACTIVATED SLUDGE (RAS) PIPING RENOVATIONS, DISTRICT PROJECT 100051; FIND THE PROJECT IS EXEMPT FROM THE CALIFORNIA ENVIRONMENTAL QUALITYACT (CEQA); AND AUTHORIZE UP TO A 25-PERCENT CONTINGENCY SUBMITTED BY: INITIATING DEPARTMENT: WILLIAM GRANT, ASSOCIATE ENGINEER ENGINEERING AND TECHNICAL SERVICES - CAPITAL PROJECTS REVIEWED BY: CRAIG MIZUTANI, SENIOR ENGINEER EDGAR J. LOPEZ, CAPITAL PROJECTS DIVISION MANAGER DANEA GEMMELL, PROVISIONAL DIRECTOR OF ENGINEERING AND TECHNICAL SERVICES ISSUE On February 15, 2023, six sealed bids were received and opened for the construction of the RAS Piping Renovations, District Project 100051 (Project). The Board of Directors (Board) must consider award of the contract or reject bids within 50 days of the bid opening. Authorization is also required for the General Manager to execute the Contract Documents and include up to 25-percent contingency. BACKGROUND This project is intended to improve the reliability of the RAS system within the treatment plant due to aging piping and to reduce the risk of failure associated with deteriorated piping that is partially submerged in the final effluent channel. The work generally consists of the replacement of several segments of RAS piping, temporary systems to continue operations, removal of abandoned piping and appurtenances, and other piping improvements. The Project is located within the Treatment Plant, as presented in Attachment 1, Location Map. Central San and HDR Engineering, Inc. (HDR) prepared the plans and specifications for the Project. The Engineer's Estimate for the construction is $2,000,000. This Project was advertised on January 16 and January 23, 2023. Six sealed bids ranging from $1,283,200 to $2,421,000 were received and publicly March 13, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 6 of 43 Page 2 of 10 opened on February 15, 2023. A summary of bids received is shown in Attachment 2. The Capital Projects division conducted a technical and commercial review of the bids and determined that GSE Construction Company, Inc. (GSE) is the lowest responsive and responsible bidder. References were provided for GSE, and staff received satisfactory feedback. Central San will administer the construction contract and provide administration, inspection, survey, and office engineering. Consultants will provide construction inspection services and submittal review to supplement staff on an as -needed basis. HID is the project designer, and staff will issue an agreement amendment for engineering service during construction within the General Manager's delegated authority. California Environmental Quality Act (CEQA) Staff has concluded that this Project is exempt from the California Environmental Quality Act (CEQA) under Central San's CEQA Guidelines, Section 15301 since it involves minor alterations to existing public facilities involving no expansion of use. Approval of this Project will establish the Board of Directors' independent finding that this Project is exempt from CEQA. ALTERNATIVES/CONSIDERATIONS Staff is currently working with HDR and originally planned to perform the Project scope under the Aeration Diffuser project. However, due to construction constraints and sequencing, staff decided to bid the work separately to help construct both projects. An alternative would be to reject bids, which is not recommended since the work received great bid pricing, and to reduce potential issues with contaminating the final effluent quality FINANCIAL IMPACTS The total estimated project cost is $2,018,200. This includes design, the construction contract, contingency, staff time, and third -party services. Staff recommends a 25-percent contingency for this Project due to the potential for additional unforeseen demolition and repair work around the aeration basins and to repair other piping that may be in need of replacement once inspected. See Attachment 3 for a budget summary for the Project. This Project will be funded by the Aeration Basins Diffuser Replacement, DP 100019 included in the Fiscal Year (FY) 2022-23 Capital I mprovement Budget (CI B) on page 255 with a total estimated project budget of $61,300,000, and has adequate funding for the next fiscal year. COMMITTEE RECOMMENDATION The Engineering and Operations Committee will review this matter at its meeting on March 13, 2023. Staff will provide an update of the Committee's recommendation when brought before the Board of Directors for approval. RECOMMENDED BOARD ACTION Staff recommends the following: 1. Find that the Project is exempt from CEQA, 2. Award a construction contract in the amount of $1,283,200 for the construction of the RAS Piping Renovations, District Project 100051, to GSE Construction Company, Inc., the lowest responsive and responsible bidder; and 3. Authorize the General Manager to execute the Contract Documents subject to submittal requirements and include up to 25-percent contingency. March 13, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 7 of 43 Page 3 of 10 Strategic Plan Tie -In GOAL TWO: Environmental Stewardship Strategy 1 - Achieve compliance in all regulations GOAL FIVE: Safety and Security Strategy 2 - Protect Personnel and assets from threats and emergencies GOAL SIX. Infrastructure Reliability Strategy 2 - Execute long-term capital renewal and replacement program ATTACHMENTS: 1. Project Location Map 2. Summary of Bids 3. Post B id/P reconstruction Estimate 4. Presentation March 13, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 8 of 43 Page 4 of 10 RAS Piping Renovations Project District Project 100051 Location Map Date:2/23/2023 0 Martinez detail Area a Concord Pleasant Hill Project Location 0 ' C ❑ oM 0 o�a^ e�� 0 � Oo 0 Q Project Location `r Q District -Owned Property Note: /� 0 200 400 Map Displayed in North American Datum of 1983 Attachment Central San data as of February 2023. IT Feet California State Plane, Zone III FIPS O403, US Feet 1 March 13, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 9 of 43 Page 5 of 10 ATTACHMENT 2 RAS PIPING RENOVATIONS DISTRICT PROJECT 100051 SUMMARY OF BIDS PROJECT NO.: 100051 NO. OF ADDENDA: 3 DATE/TIME: FEBRUARY 15, 2023/2:00 PM PROJECT NAME: RAS PIPING RENOVATIONS PROJECT MANAGER: WILLIAM GRANT PROJECT LOCATION: 5019 IMHOFF PLACE, MARTINEZ CA ENGINEER'S ESTIMATE: $2,000,000 NO. BIDDER BID PRICE 1 GSE Construction Company, Inc. $1,283,200 Livermore, CA 94551 2 C. Overaa and Co. $1,588,000 Richmond, CA 94801 3 Gateway Pacific Contractors, Inc. $1,630,000 Sacramento, CA 95832 4 W.M. Lyles Co. $1,736,950 Fresno, CA 93711 5 Valentine Corporation $2,365,369 San Rafael, CA 94901 6 GSW Construction, Inc. $2,421,000 San Francisco, CA 94105 BIDS OPENED BY: /s/Katie Young DATE: February 15, 2023 at 2:00 PM March 13, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 10 of 43 Page 6 of 10 ATTACHMENT 3 RAS PIPING RENOVATIONS DISTRICT PROJECT 100051 POST-BID/PRECONSTRUCTION ESTIMATE No. Item Description Amounts Construction Cost 1 CONSTRUCTION a. Construction Contract $1,283,200 b. Contingency at 25% $320,000 SUBTOTAL - CONSTRUCTION COST $1,603,200 100% 2 CONSTRUCTION MANAGEMENT a. District Forces Construction Management $85,000 Operations $30,000 b. Outside Services Construction Inspection $65,000 Engineering Support As -needed $55,000 SUBTOTAL - CONSTRUCTION MANAGEMENT $235,000 15% 3 DESIGN (PREBID ESTIMATE) a. Staff & Consultant Costs $180,000 SUBTOTAL - PREBID EXPENDITURES $180,000 11% 4 TOTAL ESTIMATED PROJECT COST $2,018,200 March 13, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 11 of 43 Page 7 of 10 Project Background and Drivers Over the years, Central San has replaced portions of the Return Activated Sludge (RAS) piping for the Aeration Basin Systems to maintain reliability. RAS is settled activated -sludge collected in the secondary clarifiers. This biomass is returned to the aeration basins, allowing for a concentrated number of microorganisms back to the process. The RAS piping being replaced was identified by staff, and the piping over the Final Effluent (FE) channel is of urgent concern since any type of failure would contaminate the effluent. March 13, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 12 of 43 Page 8 of 10 Project Improvements Bid Results Engineer's Estimate: $2,000,000 Six (6) bids received Lowest Bidder: GSE Construction Company, Inc. RAS Piping • Replace piping over FE channel • Add new valves for better control • Construct temporary system for operations Aeration Basin Deck • Remove abandoned coarse bubble piping, valves, and repair concrete • Replace missing guard rails and toe boards • Remove crossover stairs where no longer needed South Selector Channel • Demolition of abandoned piping and coarse bubble diffusers • Removal of deteriorated spray piping —..ddm No. Bidder Total Bid I GSE Construction Company, Inc. $1,283,200 2 C. Overaa and Co_ $1,588,000 3 Gateway Pacific Contractors, Inc. $1,630,000 4 W.M. Lyles Co. $1,736,950 5 Valentine Corporation $2,365,369 6 GSW Construction, Inc. $2,421,000 March 13, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 13 of 43 2 Page 9 of 10 Total Estimated Project Cost No. Item Description Amounts Construction Cost 1 CONSTRUCTION a. Construction Contract $1,283,200 b. Contingency at 25% $320,000 SUBTOTAL -CONSTRUCTION COST $1,603,200 100% I CONSTRUCTION MANAGEMENT a. District Forces Construction Management $85,000 Operations $30,000 b. Outside Services Construction Inspection $65 000 Engineering Support As -needed $55 000 SUBTOTAL - CONSTRUCTION MANAGEMENT $235,000 15°% 3 DESIGN (PREBID ESTIMATE) a. Staff & Consultant Costs $180 000 SUBTOTAL - PREBID EXPENDITURES $180 000 1 t % 4 TOTAL ESTIMATED PROJECT COST $2.018 200 Project Schedule Award: March 16, 2023 Piping long lead item thus staff recommended to post position paper in parallel with Board Meeting Anticipated NTP: April 24, 2023 Project Completion: December 2023 ti March 13, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 14 of 43 3 Page 10 of 10 Committee Recommendation: Staff recommends approval of the following: Find that the Project is exempt from CEQA; Award a construction contract in the amount of $1,283,200 for the construction of the RAS Piping Renovations District Project 100051, to GSE Construction Company Inc., the lowest responsive and responsible bidder; and Authorize the General Manager to execute the Contract Documents subject to submittal requirements and include up to 25-percent contingency. March 13, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 15 of 43 4