Budget Amendment Request 1
August 25, 2022
Mr. Patrick Dobbins
City of Gonzales
147 4th Street
Gonzales, CA 93926
Subject: Separate Industrial Wastewater System Design - Budget Amendment Dear Mr. Dobbins,
Dudek and the City entered into a contract on October 5, 2020 for completion of final design services for the Separate Industrial Wastewater System. Work effort is currently being tracked and billed according to our $1,055,000 budget. This budget includes $671,746 for the IWTF final design (Tasks 2.3- IWRF Construction Drawings – 60%, 2.4 – IWRF Construction Drawings – 90%, 2.5 – IWRF Construction Drawings – 100% and Final,
2.7 – IWRF Specifications, and 2.9 – IWRF Engineer’s Estimate of Probable Construction Cost).
The IWTF 100% Design Package is planned to be submitted to the City at the end of August 2022 or early September 2022, with the possible exception of front end and/or division 1 specifications which are to be received from Psomas and coordinated with the design drawings and technical specifications. At this point, some of the IWTF final design tasks are over budget based on the following factors:
The original scope of work for the IWTF design tasks did not account for the following factors, resulting in task over-runs:
▪ Additional considerations for plant capacity – The City requested that Dudek evaluate and prepare cost estimates and considerations for plant capacity of 1.5 mgd during the 90% design stage. This resulted in additional coordination with vendors, design options pricing, and associated work to provide the City with the information needed to make a final determination about a possible change in the design capacity of the plant. [Cost: $11,500]
▪ Project schedule delays – The schedule for the project was delayed due to additional time required for the City to review deliverables as well determine if a change in direction of the project was needed. These schedule delays ultimately required more time for our staff and subs to get up to date and back up to speed on the project. [Cost: $2,500]
▪ Additional coordination required with Taylor Farms and City regarding nitrogen discharge concentrations and other constituents that could affect the treatment process. This led to analysis of the nitrogen loads and assistance for the City in recommending measures to Taylor Farms to reduce their nitrogen concentrations in their wastewater. [Cost: $5,500]
▪ Process equipment design not originally anticipated including:
- Potable water storage and booster pump system [Cost: $9,000] - Non-potable water booster pump system [Cost: $9,500]
- Recirculation pump station system [Cost: $9,500]
▪ Additional coordination with SRF to provide responses to questions and comments during the review period related to SRF funding [Cost: $5,500]
Budget Amendment Request 2
▪ Our electrical engineering subconsultant identified the following out of scope items based on his original scope of work [combined cost: $25,000]:
- Additional work and complexity for electrical design for the following:
- Fiberoptic link from new operations building to existing plant. - New sump pump in recirculation valve vault.
- Motorized, pedestal controlled swing gate
- Potable and non-potable pump systems
- 3 additional electrical drawings beyond the anticipated list At this time, our contingency budget for the project has been exhausted due to project changes and additional work previously approved by the City which was required to complete the conveyance design. Altogether, the additional work summarized above equates to a total of $78,000. Thank you for your consideration of this budget amendment request and for providing us with this opportunity to serve you and the City. We are here to discuss any questions or concerns you may have so please do not hesitate to give me a call at (510) 601-2518.
Sincerely,
Phil Giori, P.E.
Project Manager
Dudek