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MARLEY COOLING TOWER COMPANY <br /> STOCKTON, CALIFORNIA FACILITY <br /> PRETREATMENT SYSTEM <br /> 1.0 INTRODUCTION <br /> This report presents a description of the pretreatment system at the <br /> Marley Cooling Tower Company in Stockton, California. Due to the <br /> presence of arsenic, organics and suspended solids in the storm water, <br /> the existing filtering system and ion exchange units were not effective <br /> in the treatment of storm water as originally conceived. As a result, <br /> alternative technologies were evaluated and laboratory and full-scale <br /> tests were performed to determine the most effective pretreatment system <br /> for the storm water. A limited number of alternatives were evaluated <br /> due to the capabilities of the existing water treatment plant and the <br /> treatability of the storm water. Based on the recommendations of the <br /> report, a mobile pretreatment system was setup onsite to treat storm <br /> water in the winter of 1987-88. In the spring and summer of 1988, a <br /> permanent system was designed with the installation scheduled for <br /> completion in mid-December, 1988. The following sections provide a <br /> detailed description of the pretreatment facility. <br /> 11654 1-1 <br /> VLS120288 <br />