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Show North Kennecott Wastewater Facility Soils Treatment Action Removal STATEMENT I. SITE HISTORY AND Plant Ponds (SSID # OF and Site 4B) WORK BACKGROUND Treatment Plant (WWTP) is located adjacent to intersection of State Highways 201 (2100 south) and 202, north of the Kennecott Refinery. The WWTP began operations in The Wastewater the It produces a sludge residual which has been discharged five ponds called Ponds A, B, C, C-Extensiort, and D. All of the ponds are located within 1.5 miles of the WWTP as shown in Figure 1. 1974. into The WWTP of approximately 3,000 gallons per waters from the Smel ter, Refinery, treats process Plant, minute (gpm) Utah Copper and in-plant facilities North Concentrator chloride Ferric and/or lime are added to the sewage. A sludge residual from wastewater in the treatment process. the WWTP is produced at a rate of approximately 250 wet tons The composition of the WWTP sludge has changed due per day. to changes in the operation and chemicals used in the waste Power water treatment prOCess. west Magna tailings impoundment is size of which 12.5 acres contains K@nnecott used this unlined pond from August 1974 to sludge. It contains approximately 62,000 wet tons January 1981. Some of the sludge is Pre (52,000 cubic yards) of sludge. Noranda lime and smelting and was produced with only lime/ferric chloride precipitation processes from August 1974 until May 1978. Pond located A, approximately Pond, is B 80 of located approximately 5.9 ranges from 15 to 1981 March 1983 and placed in to acrs 16 the in acres the' north in size. The feet. of the thickness WWTP of the and is sludge The pond was originally used from 1987, the sludge was treated with ,cement a landfill located within the tailings Kennecot t placed pond B back into service in impoundment. 1988 and filled it to capacity in early 1989. -Pond B has not been used since 1989. It contains approximately 145,000 wet' tons of (120,800 cyds) sludge. High-lime Noranda sludge derived from the high-lime processing operations in early 1983 until operations shut down in 1985. Operations were resumed in 1987 using high-lime processing until mid-1989. In to ,Pond C is approximately 7.8 acres in size and is located about feet southeast of the WWTP. Kennecott used this pond from March 1983 until April 1989 when it reached capacity. The 500 estimated 282,000 thickness from 17 (235,000 cyds) wet tons of ' to 36 feet. ,1 sludge ranges in |
