Arrowbear Park, California - Case Study
In July 2010, AdEdge Water Technologies, LLC was contacted by Engineering Resources to design, manufacture and install a uranium water treatment system for the community of Arrowbear Park County Water District in the San Bernardino National Forest. The community water system has a raw water uranium concentration of 118 parts per billion well above the EPA maximum contaminant level of 30 parts per billion. The uranium treatment system is rated for a maximum design flow of 200 gpm. The system was started up in January 2011.
The AdEdge treatment system features a skid-mounted AD92 ion exchange package unit sized for a maximum design flow of 200 gpm. The model AD92-4260CS-2-AVH utilizes AdEdge AD92 media in a two vessel carbon steel configuration in parallel. The system is equipped with automated control valves and harness, central control panel with programmable logic controller (PLC) and a color user interface screen. System features also include differential pressure switches, control panel and local gauges, flow sensors and totalizers, and a central hydraulic panel with sample ports for a complete functioning packaged unit.
The regenerative AD92 IX ion exchange approach was the preferred and most cost-effective option for the site, and this technology has been designed to provide high efficiency removal of naturally-occurring uranium from groundwater supplies. The system is furnished complete with a regeneration/brine system to regenerate the IX resin periodically on demand. A sodium chloride (brine) solution is used to regenerate the anion resin. The brine module is a separate system composed of a single polyethylene brine tank with valves, flow restrictors and rotometers which work during the automatic cycle operation, service, backwash, brining, slow rinse and fast rinse cycles. Chlorine is injected into the water for disinfection after the uranium treatment unit into the distribution.
The system was started up and commenced in January 2011. The AD92 IX media can selectively remove the negatively charged uranium anion to below the State and Federal MCL of 30 ppb. Since the system began operation, the uranium concentration is at a non-detectable level.
Client: Arrowbear Park, CA
Date: December 2009
Flow Rate: 200 gpm