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THE MARLEY COOLING TOWER COMPANY <br /> 5800 Foxnage Drive/P.O. Box 2912/Mission, Kansas 66201/Telephone: (913) 362-1818 Q ( <br /> September 2, 1987 <br /> Mr. Jim Aust eng <br /> De artmen of alth ServsTostances <br /> trol <br /> 4410 Power Inn Road <br /> Sacramento, California 95826 <br /> RE: Progress Report-Stockton Assessment Program <br /> Dear Mr. Austreng: <br /> This report summarizes the activities at the Stockton facility <br /> from July 1, 1987 to August 15 , 1987 . <br /> I• Pond Closure <br /> A. Construction - the water treatment plant is <br /> substantially complete. <br /> B. Training and Start-Up - Formal training was <br /> completed week of July 27 . The "hands-on" <br /> training has been continuing since then. <br /> C. Pond Water Removal - The coagulation and <br /> settling of the silt from the pond water was <br /> effective. First trial run was about August <br /> 3rd. Water was withdrawn from pond, treated, <br /> sample taken and water returned to the pond. <br /> The analysis has shown the above limit of <br /> arsenic is coming through the ion exchanger. <br /> Test have continued, using different variation <br /> in the exchanger to remove the arsenic and not <br /> effect the copper and chrome removal. To date <br /> no water has been discharged to the diverting <br /> canal . <br /> IT . Ground Water Assessment <br /> A. Aquifer Test - The aquifer test was completed <br /> week of July 20 , 1987 . Hargis is now in process <br /> MARLEY <br /> A MARLEY COMPANY <br />