REPORT/RECOMMENDATION TO THE BOARD OF SUPERVISORS
OF SAN BERNARDINO COUNTY
AND RECORD OF ACTION
November 19, 2024
FROM
NOEL CASTILLO, Director, Department of Public Works - Special Districts
LUTHER SNOKE, Chief Executive Officer, County Administrative Office
SUBJECT
Title
Amendment to Contract with Norstar Plumbing and Engineering Inc. for the Chino Airport Groundwater Remedial Project - Phase One, in the Chino Area
End
RECOMMENDATION(S)
Recommendation
Approve Amendment No. 1 to Contract No. 23-203 with Norstar Plumbing and Engineering Inc. for necessary work to construct an additional groundwater well site located offsite of the Airport, increasing the contract amount by $1,736,689. from $17,831,138.59 to $19,567,827.59, and extending the contract duration from 784 days to 814 calendar days. (Four votes required).
(Presenter: Noel Castillo, Director, 387-7906)
Body
COUNTY AND CHIEF EXECUTIVE OFFICER GOALS & OBJECTIVES
Operate in a Fiscally-Responsible and Business-Like Manner.
Ensure Development of a Well-Planned, Balanced, and Sustainable County.
Provide for the Safety, Health and Social Service Needs of County Residents.
FINANCIAL IMPACT
Approval of this item will not result in the use of additional Discretionary General Funding (Net County Cost). The Amendment No. 1 to the Norstar Plumbing and Engineering Inc. Contract No. 23-203 (Contract) for the Chino Airport Groundwater Remedial Project - Phase One, Chino Area (Project) will be funded by the American Rescue Plan Act (ARPA) as approved by the Board of Supervisors (Board) on October 25, 2022 (Item No. 63) for eligible costs. Sufficient appropriation and revenue are included in the 2024-25 budget of the Department of Public Works - Special Districts (Department) ARPA Capital Improvement Program (CIP) fund, and will be included in future recommended budgets, as needed.
BACKGROUND INFORMATION
On October 31, 1990, the Santa Ana Regional Water Quality Control Board (Water Board) issued Clean-up and Abatement Order No. 90-134 to San Bernardino County (County) for suspected contamination of groundwater beneath and near Chino Airport (Airport). The groundwater is suspected to have been contaminated due to past usage of chemicals that contain Volatile Organic Compounds (VOCs) by prior Airport occupants of the Airport property. The County has since complied with this order by conducting investigative activities at the Airport to identify potential sources of contamination and understand the extent of groundwater contamination.
In June 2008, the Water Board issued Clean-up and Abatement Order No. R8-2008-0064, which required the County to conduct additional soil and groundwater investigations and develop a remedial action plan for containment and mitigation of VOCs in groundwater downgradient of the Airport. In January 2017, the Water Board issued Clean-up and Abatement Order No. R8-2017-0011 that superseded the 2008 Order and incorporated an additional requirement for the preparation and submittal of a Feasibility Study and to include information on work completed since the 2008 Order.
During 2016 and 2017, the County prepared a Feasibility Study to identify and evaluate options to properly mitigate environmental impacts from past operations and historic activities at the Airport. Based on the Final Feasibility Study, dated May 2017, an Interim Remedial Action Plan (Plan) was prepared proposing implementation of a pump-and-treat system that includes two sets of groundwater extraction wells, for a total of 10 wells, and a conveyance system to a treatment system.
On March 14, 2023 (Item No. 39), the Board approved Contract No. 23-203 with Norstar Plumbing and Engineering Inc. in the amount of $17,788,935 for the construction of the Project. Additionally, the Board authorized the Director of the Department to order any necessary changes or additions in the work being performed under the construction contract for the total not-to-exceed amount of $1,778,893, pursuant to Public Contract Code Section 20142.
On July 12, 2023, the Director of the Department approved Administrative Change Order No. 1 to Contract No. 23-203 in the amount of $41,458.24, increasing the contract amount from $17,788,935 to $17,830,393.24.
On August 2, 2023, the Director of the Department approved Administrative Change Order No. 2 to Contract No. 23-203 in the amount of $67.66, increasing the contract amount from $17,830,393.24 to $17,830,460.90, and extending the contract duration by 25 days, from 730 calendar days to 755 calendar days.
On February 14, 2024, the Director of the Department approved Administrative Change Order No. 3 to Contract No. 23-203 in the amount of $48.01, increasing the contract amount from $17,830,460.90 to $17,830,508.91, and extending the contract duration by 26 days, from 755 calendar days to 781 calendar days.
On June 6, 2024, the Director of the Department approved Administrative Change Order No. 4 to Contract No. 23-203 in the amount of $14.48, increasing the contract amount from $17,830,508.91 to $17,830,523.39.
On October 21, 2024, the Director of the Department approved Administrative Change Order No. 5 to Contract No. 23-203 in the amount of $615.20, increasing the contract amount from $17,830,523.39 to $17,831,138.59, and extending the contract duration by 3 days, from 781 calendar days to 784 calendar days.
Since that time, additional changes and additional work to the Project work have been identified, which are set forth in the proposed Amendment. These changes are necessary for the completion and functionality of the Project, they were not included at the time of contracting.
Approval of the proposed Amendment will increase the contract amount by $1,736,689.00, from $17,831,138.59 to $19,567,827.59 and will extend the contract duration by 30 days, from 784 calendar days to 814 calendar days. The Amendment is necessary to accommodate construction adjustments for the Project, complete the newly identified necessary work and compensate the contractor for the additional cost and time of the Project, which is anticipated to be completed in June 2025.
PROCUREMENT
Not applicable.
REVIEW BY OTHERS
This item has been reviewed by County Counsel (Sophie Curtis, Deputy County Counsel, Maria Insixiengmay, Deputy County Counsel, and Agnes Cheng, Deputy County Counsel, 387-5455) on October 28, 2024; Finance (Jessica Trillo, Administrative Analyst, 387-4222 and Guy Martinez, ARPA Compliance Officer, 387-5428) on October 29, 2024; and County Finance and Administration (Paloma Hernandez-Barker, Deputy Executive Officer, 387-5423) on November 1, 2024.