Approve agreement with T & S Construction Company, Inc., in the amount of $1,994,500, to construct the Pintail arsenic system for the Wild Wings County Service Area (CSA) and authorize the Director of Community Services to approve contract change orders up to a cumulative maximum of $300,000. (No general fund impact) (Lindbo/Villa)

The Wild Wings County Service Area (CSA) is a rural community that depends on two wells to provide potable drinking water to its 338 residences. The community was originally designed to have two wells that alternated each day and pumped from two different aquifers. The alternate operation of the wells allowed for the recovery of the aquifers and a longer life span of the pumps. In 2008, the State of California, Department of Drinking Water, decreased the maximum contaminant level for arsenic from 50 micrograms/liter to 10 micrograms/liter for drinking water.  As a result of this new standard, one of the wells (Canvas Back) was changed to "Emergency Standby" status because the water from this well exceeded the new state standard. This status eliminated the use of the Canvas Back well for drinking water purposes. With only one well in operation (Pintail), the associated aquifer is being drawn down and is not being given a chance to recover. In addition, relying on one well increases the intended cycle times of the pumps and motors.  

In December 2019, the Board of Supervisors approved an agreement with Luhdorff and Scalmanini Consulting Engineers (LSCE) for the design and engineering of an arsenic treatment facility. The recommendation from LSCE included a centralized adsorption system located at the Pintail well site. The plans and specifications were adopted by the Board of Supervisors on July 11, 2023. County Staff completed a competitive bidding process for the construction of the facility. T & S Construction Company, Inc. submitted the lowest bid for the project and the bid was responsive and responsible. As such, the construction contract may be awarded to T&S Construction.

In November 2021, the Department of Water Resources (DWR) awarded the Wild Wings CSA the Small Community Drought Relief grant to support the arsenic treatment project in the amount of $1.35 Million. The remainder of the construction expense will be paid from Wild Wings Water fund reserves previously collected for arsenic treatment.   

Yolo County General Services Procurement Division, County Counsel, Wild Wings County Service Area Advisory Committee and the California State Department of Water Resources - Small Community Drought Relief Program