Consent-General Government # 15.
Board of Supervisors
General Services
- Meeting Date:
- 04/28/2026
- Brief Title
- Lower Cache Creek Off-Channel Pits Mercury Monitoring - Contract Amendment
From:
Ryan Pistochini, Director of General Services
Staff Contact:
David van Rijn, Deputy Director of General Services, General Services Department
Supervisorial District Impact:
District 5
Subject
Approve second amendment to Agreement No. 24-01 with Dr. Darell G. Slotten to extend the term for one-year to June 30, 2027, and increase the maximum compensation by $210,000 to a new maximum of $810,000 to conduct mercury monitoring prescribed by Section 10-5.517(Mercury Bioaccumulation in Fish) of the County’s Surface Mining and Reclamation Ordinance. (No general fund impact) (Pistochini/Van Rijn)
Recommended Action
- Approve second amendment to Agreement No. 24-01 with Dr. Darell G. Slotten to extend the term for one year to June 30, 2027; and
- Increase the maximum compensation by $210,000 to a new maximum of $810,000 to conduct mercury monitoring prescribed by Section 10-5.517 (Mercury Bioaccumulation in Fish) of the County’s Surface Mining and Reclamation Ordinance.
Strategic Plan Goal(s)
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Sustainable Environment |
Reason for Recommended Action/Background
Monitoring mercury levels is required under County Code Section 10-5.517 (Mercury Bioaccumulation in Fish) to satisfy the monitoring obligations of the Off-Channel Mining Plan, a component of the Cache Creek Area Plan. This amendment will extend Dr. Slotton's contract for one year and update labor rates. The original contract from 2024 has already been extended once for one year (2025-2026).
The Off-Channel Mining Plan (OCMP) was developed through a collaborative effort involving several key stakeholders. These included aggregate producers such as Teichert, CEMEX, Granite, and Syar Industries, along with the Cache Creek Technical Advisory Committee. Development also required coordination with state regulatory agencies—including the California Department of Fish and Wildlife (CDFW), the Regional Water Quality Control Board, the California Department of Conservation, and the California Native American Heritage Commission—as well as conservation groups like the Cache Creek Conservancy and the Yolo Habitat Conservancy.
The Off-Channel Mining Plan (OCMP) was developed through a collaborative effort involving several key stakeholders. These included aggregate producers such as Teichert, CEMEX, Granite, and Syar Industries, along with the Cache Creek Technical Advisory Committee. Development also required coordination with state regulatory agencies—including the California Department of Fish and Wildlife (CDFW), the Regional Water Quality Control Board, the California Department of Conservation, and the California Native American Heritage Commission—as well as conservation groups like the Cache Creek Conservancy and the Yolo Habitat Conservancy.
Collaborations (including Board advisory groups and external partner agencies)
N/A
Competitive Bid Process/Vendor Performance
January 1, 2024, via a Sole Source, the parties entered into Agreement No. 24-01 (Agreement) with Dr. Slotton to conduct mercury monitoring prescribed by Section 10-5.517 (Mercury Bioaccumulation in Fish) of the County’s Surface Mining and Reclamation Ordinance. Dr. Slotton is the only vendor that can provide the mercury monitoring services required by the County's Surface Mining Reclamation Ordinance. On October 22, 2025, the parties amended the Agreement for one additional year. This second amendment will extend the agreement through the fiscal year 2026-27 and increase the compensation by $210,000 to a new contract maximum of $810,000.
2026/2027 monitoring costs.
Task 1 Ponds-Fish Monitoring 7 ponds, $123,500
Task 2 Ponds-Water Profiles 7 ponds $85,375
2026/2027 monitoring costs.
Task 1 Ponds-Fish Monitoring 7 ponds, $123,500
Task 2 Ponds-Water Profiles 7 ponds $85,375
Fiscal Impact
No Fiscal Impact
Fiscal Impact (Expenditure)
- Total cost of recommended action:
- $ 210,000
- Amount budgeted for expenditure:
- $ 200,000
- Additional expenditure authority needed:
- $ 0
- On-going commitment (annual cost):
- $ 210,000
Source of Funds for this Expenditure
- Mining fees
- $210,000
Further explanation as needed:
Funding for the mercury monitoring comes from the Aggregate Mining Fees and does not impact the County's general funds. This amendment is in the Department's upcoming budget request.
The total cost of this agreement is $210,000; however, only $200,000 was budgeted in the FY 2026-27 requested budget. Staff will monitor the overall budget in the coming fiscal year and return to the Board during the midyear budget review process to seek budget adjustments as needed.
The total cost of this agreement is $210,000; however, only $200,000 was budgeted in the FY 2026-27 requested budget. Staff will monitor the overall budget in the coming fiscal year and return to the Board during the midyear budget review process to seek budget adjustments as needed.
Attachments
Form Review
| Inbox | Reviewed By | Date |
|---|---|---|
| Ryan Pistochini | Ryan Pistochini | 04/14/2026 11:44 AM |
| Ryan Pistochini | Ryan Pistochini | 04/14/2026 10:32 PM |
| Financial Services | Dylan Rader | 04/15/2026 12:22 PM |
| Ryan Pistochini | Ryan Pistochini | 04/15/2026 10:00 PM |
| Financial Services | Dylan Rader | 04/16/2026 08:43 AM |
| County Counsel | Hope Welton | 04/20/2026 10:45 AM |
| Cindy Perez | Cindy Perez | 04/21/2026 02:19 PM |
- Form Started By:
- David Van Rijn
- Started On:
- 04/02/2026 12:22 PM
- Final Approval Date:
- 04/21/2026