Conneaut Lake Park, PA Arsenic Reduction
AdEdge Water Technologies, LLC. (AdEdge) was selected in 2009 by the U.S. EPA and the host site in Round 2a of the Arsenic Demonstration Program to implement a turnkey arsenic treatment for the Conneaut Lake Park (CLP), in Conneaut Lake, PA. The CLP water system is served by two wells with a design flow of 250 GPM. The wells provide potable water for a community with over 100 connections and a variable seasonal population. The treatment system receives water on the good side of the storage tower with an arsenic level of 28 ppb, above the EPA MCL of 10 ppb and elevated levels of iron. From the 250 GPM well, water is treated by AdEdge system which is configured in parallel. AdEdge was contracted by U.S. EPA to provide and manage all aspects of the project including permitting with DEP, design, fabrication, installation, and startup activities. The system was AdEdge’s 12th full-scale EPA Arsenic Demonstration Project. AdEdge proposed and installed an AD26-5460CS-S-3-AVH treatment system designed to reduce arsenic concentrations to below the new arsenic treatment standard of 10 ppb. The system utilizes coagulation/filtration technology deploying AdEdge’s AD26 manganese dioxide media. Since one of the wells has low natural iron content, the design included a ferric chloride injection module and a 100% backwash recycle system capable of filtering particulates and reclaiming all of the periodic backwash water for treatment and use. The packaged system features triplex 54-inch diameter carbon steel adsorption vessels mounted on a painted epoxy coated carbon steel skid, pre-piped and integrated. The system is placed after a pre-chlorination and ferric chloride module for oxidation of As (III) to As (V), and coagulation of iron and arsenic. The treatment system is equipped with automated control valves and harness, central control panel with programmable logic controller (PLC) and a color user interface screen. The System also features a hydraulic panel with local gauges and sample ports for a complete functioning packaged unit. Since the full-time operation began in December 2009, the system has effectively reduced arsenic consistently below 2 ppb, well below the MCL. Approximately 30,000 gallons per day is being processed through the system on average. The site’s operator performs the routine sample collection and reporting associated with the U.S. EPA’s Demonstration Program requirements with quarterly reporting of the data by U.S. EPA’s contractor Battelle.
Client: Conneaut Lake, PA Date: December 2009 Contaminant: As, Fe, Mn Flow Rate: 250 GPM