Five Wells Arsenic Treatment Project

The City of Bakersfield (City) potable water system is served by both surface water and groundwater wells. When the maximum contaminant level (MCL) for arsenic was lowered in 2008, the City was forced to take multiple key wells out of service due to elevated levels of arsenic. Based on the City’s success with constructing, testing, and commissioning adsorptive treatment at another well site, it was determined that this method should be used at these five key wells. Each well was equipped with dual adsorptive vessels, pH adjustment equipment, flow and pH monitoring, flow bypassing, and flush to waste provisions. MKN was retained to review and refine the arsenic vendor equipment proposals including treatment processes and efficiencies, perform conceptual site layouts, prepare draft & final construction document bid packages, and provide construction support including on-site construction observation.