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Home My WebLink AboutStaff Report 3.F 01/23/20063.F CITY OF PETALUMA, CALIFORNIA January 23, 2006 AGENDA BILL Agenda Title: Resolution Accepting Completion of the Interim Meetine Date: January 23, 2006 Aerator Improvement Project Meetine Time: ® 3:00 PM ❑ 7:00 PM Cateeory (check one): ® Consent Calendar ❑ Public Hearing ❑ New Business ❑ Unfinished Business ❑ Presentation Department: Director: Contact Person: Phone Number: Water Resources & Michael Ban, P.E. Margaret Orr, P.E. 778-4392 Conservation Cost of Proaosal: $310,000 Account Number: 8299-54151-C501104 Amount Budeeted: $317,000 Name of Fund: Wastewater Funds Attachments to Aeenda Packet Item: Resolution Accepting Completion of the Project Location Map (Exhibit A) Construction Photos (Exhibit B) Summary Statement: The Interim Aerator Improvement Project prepared the City's wastewater oxidation ponds for removal of biosolids from Pond No. 1 and the Aerated Lagoon. Paulson Excavating, Inc. has completed the Interim Aerator Improvement Project. Recommended City Council Action/Sueeested Motion: City Management recommends the City Council approve the resolution accepting completion of the project. Reviewe by Admin. Svcs. Dir: � D : �tI ,A %WW -1-4 Todav's Date: 1/12/06 Reviewed by City Attornev: Date: A Revision # and Date Revised: I Anarovedl by City Manner: Vofde: Date: FileC.I.P. Folder\WASTEWATER Polder\C501104 - Interim Aerator Improvements\accept agenda bill & cc report (6nal).doc CITY OF PETALUMA, CALIFORNIA JANUARY 23, 2006 AGENDA REPORT FOR RESOLUTION ACCEPTING COMPLETION OF THE INTERIM AERATOR IMPROVEMENT PROJECT PROJECT NO. C501104 EXECUTIVE SUMMARY: The Interim Aerator Improvement Project prepared the City's wastewater oxidation ponds for removal of biosolids from Pond No. 1 and the Aerated Lagoon. Paulson Excavating, Inc. has completed the Interim Aerator Improvement Project. City Management recommends the City Council approve the resolution accepting the completion of the project. 2. BACKGROUND: Since utilization of the wastewater oxidation ponds began in early 1970s, biosolids have grown in the aerated lagoon and Oxidation Pond No. 1. The Department of Water Resources surveyed the biosolids in the aerated lagoon and Oxidation Pond No. 1, and determined the aerated lagoon and Pond 1 were nearly full of biosolids. This diminishes the treatment capacity of the ponds. The biosolids had to be removed. In order for the biosolids to be removed, Oxidation Pond No. 1 would have to be temporarily decommissioned and the wastewater flows would have to be temporarily re-routed directly into Oxidation Pond No. 4 and around Oxidation Pond No. 1. To accommodate the removal of biosolids from Oxidation Pond No. 1, the Interim Aerator Improvement Project included: Relocation of four aerators from Pond No. 1 to Pond No. 4 to improve the treatment capacity of Pond No. 4. Installation of hardware and mooring cables for the relocated aerators. Purchasing of four new aerators for future installation in Pond No. 1. Installation of electrical connections. Installation of conduit and routing electrical wiring, and performing modifications to the existing motor control center. Replacement of a failed transformer and associated electrical gear at the east gate of the ponds. The location is illustrated on Exhibit A. Aerators are used to supply oxygen in the aerated lagoon and Oxidation Pond No. 1. The oxygen is used by microorganisms for growth as the microbes eat the waste in the water as food. The microorganisms grown through secondary treatment are called biosolids. This project provided 1) aeration in Pond 4 while biosolids were being removed from Pond 1. The Water Resources Department completed removal of biosolids from Pond 1 in November 2005. The aerators will remain in Pond 4 to increase the aeration capacity of the ponds until the new Ellis Creek Water Recycling Facility comes on-line in 2009. After the new plant is in operation, the aerators will only be needed to provide treatment during high flow events. The Department of Water Resources and Conservation prepared the plans and specifications for this project. The Notice Inviting Bids was issued on March 15, 2005. Bids were received and opened on March 31, 2005. The contract was awarded by the City Council on April 18, 2005. The new electrical conduit was installed and aerators moved in July, on time to facilitate the biosolids removal from Pond 1. Replacement of the failed transformer was completed in January 2006 to accommodate PG&E's schedule. Construction photos are shown on Exhibit B. The 10% retention is due and payable 60 days after the acceptance of the project. ALTERNATIVES: Accept the completion of the project. 4. FINANCIAL IMPACTS: CONSTRUCTION GENERALFUND TOTAL $294,761.68 14,738.00 $310.000 (rounded upl The final contract cost is $310,000, which is funded by the Wastewater Funds. The construction budget is $317,000. CONCLUSION: Following the acceptance of the project, the City Clerk will file a Notice of Completion with Sonoma County Recorder and Finance Department will release the retention money to the Contractor 60 days after the acceptance of the project. 6. OUTCOMES OR PERFORMANCE MEASUREMENTS THAT WILL IDENTIFY SUCCESS OR COMPLETION: Completion of the construction. 7. RECOMMENDATION: City Management recommends that the City Council adopt the resolution accepting completion of the Interim Aerator Improvement Project. RESOLUTION ACCEPTING COMPLETION OF THE CONSTRUCTION CONTRACT FOR THE INTERIM AERATOR IMPROVEMENT PROJECT (PROJECT NO. C501104) WHEREAS, in accordance with Section 68 of Article X of the City of Petaluma Charter, Section 20162 of the California Public Contract Code and other applicable law, the City of Petaluma solicited bids for the Interim Aerator Improvement project ("Project"); and WHEREAS, bids for the Project were opened on March 31, 2005 in accordance with California Public Contract Code Section 4105.5 and other applicable law; and WHEREAS, the apparent low bid for the Project was the bid of Paulson Excavating, Inc. in the amount of $274,964; and WHEREAS, by Resolution No. 2005-058 adopted on April 18, 2005, the City Council of the City of Petaluma found the bid of $274,964 for the Project to be the lowest responsive bid and awarded the Project to Paulson Excavating, Inc. in the amount of $274,964 conditioned on Paulson's timely executing the Project contract and submitting all required documents and authorized and directed the City Manager to sign the Project contract on behalf of the City upon such timely submission and to execute on behalf of the City any change orders and other amendments to the Project contract that are necessary to effectively complete the project and/or to realize the Project and/or cost benefits for the City so long as such change orders or amendments do not result in an increase in excess of $42,000; and WHEREAS, the following change orders affecting the Project amount have been approved: Change Order 1 $3,956.00 Change Order 2 929.68 Change Order 3 1,800.00 Change Order 4 3,948.00 Change Order 5 0.00 Change Order 6 800.00 Change Order 7 5,564.00 Change Order 8 2,800.00 Total Change Orders: $19,797.68 ; and WHEREAS, the final contract amount as amended including all change orders is $294,761.68; and WHEREAS, City staff have inspected the Project and determined that it has been completed in accordance with the contract requirements subject to the Contractor's continuing warranty and other obligations pursuant to the contract; and WHEREAS, based on the foregoing, staff recommends acceptance of the Project on behalf of the City; NOW, THEREFORE, BE IT RESOLVED by the City Council of the City of Petaluma as follows: The contract entitled Interim Aerator Improvement Project, Project No. C501104 with a final contract amount of $294,761.68 is accepted as complete subject to the Contractor's continuing warranty and other obligations pursuant to the contract. 2. The City Clerk/Recording Secretary is hereby authorized and directed to file a Notice of Completion concerning the Project with the Sonoma County Clerk's Office within ten (10) days of the date of this Resolution. Staff are hereby authorized and directed to release all undisputed retention not subject to pending change orders within sixty (60) days of the date of this Resolution and in accordance with the terms of the Project contract, California Public Contract Code Section 7107 and applicable law. EXHIBIT A LOCATION MAP m i �M1 J N'� BKSTOPOL i YA��Y 0 0 'pO 4� SANTA ROSS 'I � J Y q CRA ROHNERT'�?ARK 4 CYN PFJ SIT MARSHALL RD a0% 7 f KENWOOD GLEN ELLEN BOYES HOT SPRINGS 0 SAN MARIN LAKEVILLE NOVATO AGUA CALIENTE SONOMA SEARS POINT EXHIBIT B CONSTRUCTION PHOTOS CONDUITS BEING PLACED IN THE TRENCH BETWEEN THE AERATED LAGOON AND POND 1 CONDUITS FOR THE MOTOR CONTROL CENTER 10 MOTOR CONTROL CENTER 11