FROM: James D. Herberg, General Manager
Originator: Rob Thompson, Assistant General Manager
SUBJECT:
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PLANT NO. 2 PRIMARY DISTRIBUTION STRUCTURE B GATES REPAIR
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GENERAL MANAGER'S RECOMMENDATION
recommendation
RECOMMENDATION: Recommend to the Board of Directors to:
A. Approve a Service Contract to J.R. Filanc Construction Co. to repair ten slide gates for Plant No. 2 Primary Distribution Structure, per Specification No. S-2021-1249BD, for a total amount not to exceed $309,500, including sales tax and freight; and
B. Approve a contingency of $46,425 (15%).
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BACKGROUND
The Orange County Sanitation District (OC San) has three primary Distribution Structures at Plant No. 2 that direct primary influent from Headworks to groupings of Primary Sedimentation Basins. Distribution Structure B (DS-B) directs primary influent to primary clarifiers H, I, J, K, L, and M. A condition assessment conducted on DS-B while the six associated primary clarifiers were down during a construction outage identified 10 slide gates that are inoperable and other steel components inside DS-B that are corroded.
RELEVANT STANDARDS
• 24/7/365 treatment plant reliability
• Maintain a proactive asset management program
• Comply with environmental permit requirements
PROBLEM
Major corrosion issues were discovered during the condition assessment performed inside DS-B at Plant No. 2. 10 slide gates were inoperable and severe corrosion was found on numerous steel weir plates and a steel bulkhead. Replacement of these components is required to return DS-B to service.
PROPOSED SOLUTION
Staff recommends replacement of the corroded steel components identified in DS-B at Plant No. 2 through approval of a Purchase Order to the lowest responsive and responsible bidder, J. R. Filanc Construction Co.
TIMING CONCERNS
The proposed repair needs to be executed to restore DS-B and its associated six primary clarifiers to service to restore the rated primary clarification capacity at Plant No. 2. Restoration of DS-B provides OC San the ability to control and isolate flows to the B-Side primary clarifier basins.
RAMIFICATIONS OF NOT TAKING ACTION
Not repairing the slide gates will result in the inability to isolate individual B-Side primary clarifier basins. Failure of one primary basin requiring isolation will result in an outage that impacts all the B-Side primary clarifiers, severely impacting the ability to treat primary influent at Plant No. 2.
PRIOR COMMITTEE/BOARD ACTIONS
N/A
ADDITIONAL INFORMATION
OC San advertised a Request for Bid on June 8, 2021, for repair of DS-B. Five bids were received. Below are the responsive bidders and their corresponding bids. The lowest responsive and responsible bidder is J.R. Filanc Construction Co.
|
Bidder |
Amount of Bid Plus Sales Tax |
|
J.R. Filanc Construction Co. Inc |
$309,500 |
|
Abhe & Svoboda Inc. |
$584,751 |
|
Kiewit Infrastructure West Co. |
$747,000 |
|
THARSOS Inc. |
$794,000 |
|
Mehta Mechanical Company Inc. |
$982,111 |
A contingency of 15% is requested for unforeseen issues or repair of additional corroded components potentially uncovered during disassembly and repairs that could add costs during installation and performance testing.
CEQA
N/A
FINANCIAL CONSIDERATIONS
This request complies with authority levels of OC San’s Purchasing Ordinance. This recommendation would be funded under the Repairs and Maintenance line item for Division 870 FY 2020-21 Budget, Section 6, Page 100), and the available funding is sufficient for this action.
|
Date of Approval |
Contract Amount |
Contingency |
|
09/29/2021 |
$309,500 |
$46,425 (15%) |
ATTACHMENT
The following attachment(s) may be viewed on-line at the OC San website (www.ocsan.gov) with the complete agenda package:
• Service Contract
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