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  Consent-Community Services   # 34.       
Community Services  
Meeting Date: 12/07/2021  
Brief Title:    Adopt Plans and Specifications for Groundwater Extraction Pipeline in the Landfill
From: Taro Echiburu, Director, Department of Community Services
Staff Contact: Jeff Kieffer, Principal Civil Engineer, Department of Community Services, x8855

Subject
Adopt plans and specifications for the construction of the Extraction Well Pipelines. (No general fund impact) (Echiburu/Kieffer)
Recommended Action
  1. Authorize the Director, Division of Integrated Waste Management, to finalize and adopt the plans and specifications for the Construction of the Extraction Well Pipelines;
     
  2. Authorize the Director, Division of Integrated Waste Management, to sign the Notice to Contractors;
     
  3. Authorize the Division of Integrated Waste Management to advertise for competitive bids; 
     
  4. Authorize the Director, Division of Integrated Waste Management, to execute a construction contract with the lowest responsive and responsible bidder, provided the contract amount does not exceed available funds, or to reject all bids; and
     
  5. Authorize the Director, Division of Integrated Waste Management to approve all change orders up to the maximum amount allowable under State law, provided the total contract amount does not exceed the available funds for this project.
Strategic Plan Goal(s)
Sustainable Environment
Reason for Recommended Action/Background
The County maintains and operates an on-site groundwater extraction system under Waste Discharge Requirement No. R5-2002-0078 issued by the California Regional Water Quality Control Board (CRWQCB) on May 3, 2002. The purpose of the system is to depress the water table sufficiently to provide the required vertical separation between the base of the waste in the Waste Management Units and the groundwater.
 
Unfortunately, this system, which has been in-place since 1993, has not been sufficient to control groundwater levels under several of the older units of the landfill during high rainfall years.  In 2018, the CRWQCB issued a Notice of Violation (NOV) for failure to control groundwater separation under portions of Waste Management Units 1-3 at the landfill.  In response to this NOV, the division completed several studies and has installed 11 additional groundwater extraction wells along the western edge of the landfill.  In the last several years, groundwater separation has been maintained at the landfill, though this has also been aided by the extreme drought conditions.   
 
With the installation of the additional 11 extraction wells, conveyance piping must now be installed to connect these wells to the landfill’s retention pond and/or the groundwater treatment system (should contaminants be detected).
 
The plans and specifications were prepared by Geo-Logic Associates under an agreement approved by the Board on December 15, 2020.  This project is included as part of the Capital Improvement Plan approved by the Board on June 2, 2020.
Collaborations (including Board advisory groups and external partner agencies)
County Counsel has approved the agreement as to form.
Competitive Bid Process
Project will be advertised on Bidsync.com for competitive bidding. The competitive bid process will be completed in accordance with State law. Bids will be opened and read publicly at the Department of Community Services-Division of Integrated Waste Management. A contract may only be awarded to the lowest responsive and responsible bidder.

Fiscal Impact
Fiscal impact (see budgetary detail below)
Fiscal Impact (Expenditure)
Total cost of recommended action:    $   550,000
Amount budgeted for expenditure:    $   863,000
Additional expenditure authority needed:    $   0
One-time commitment     Yes
Source of Funds for this Expenditure
$550,000
Explanation (Expenditure and/or Revenue)
Further explanation as needed:
Construction of the Extraction Well Pipelines will be paid by the Sanitation Enterprise Fund, which is funded through the tipping fees collected at the landfill. There will not be an impact to the General Fund. The engineer's estimate including contingency for the Construction of the Extraction Well Pipeline is $550,000.  Sufficient funds have been budgeted in the FY 21-22 division budget for this work.
 
Attachments
Att. A. Groundwater extraction pipeline plans and specifications

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Form Review
Inbox Reviewed By Date
Taro Echiburu Taro Echiburu 11/23/2021 01:51 PM
Financial Services Shelby Milliren 11/23/2021 02:27 PM
County Counsel Hope Welton 11/23/2021 02:33 PM
Madison York Madison York 11/24/2021 09:25 AM
Elisa Sabatini Elisa Sabatini 11/29/2021 04:54 PM
Form Started By: Jeff Kieffer Started On: 11/16/2021 08:25 AM
Final Approval Date: 11/29/2021

    

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