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<br />V1. HAZARDOUS WASTE ACTIVITY DESCRIPTION:
<br />1. Dissolving the copper from the non -circuit areas of the board using ammonia etchant
<br />generates the majority of hazardous waste at this facility. In 1991, 323 tons of this waste
<br />were manifested to Entech Recovery (daughter company of CP Inorganics), 34400
<br />Zwissig Way, Union City, California, 94587, for reprocessing and copper reclamation. In
<br />1992, .333 tons were generated and the waste was manifested to Entech at the previously
<br />noted location until August when the waste was manifested to Southern California
<br />Chemical Company (another daughter company of CP Inorganics, now being called CP
<br />Chemical), 8851 Dice Road, Santa Fe Springs, California.
<br />2. Another waste stream encompasses all copper contaminated debris. This would include
<br />such waste as absorbent and rags used to clean and contain spills and filters generated
<br />from the batch treatment and plating processes. In 1991, 7.6 tons were manifested to
<br />Chemical Waste Management, 35251 Old Skyline Blvd., Kettleman City, California, 93234.
<br />In 1992, 14.8 tons were generated and transported to Chemical Waste Management.
<br />3. Light weight hydraulic oil is used to lubricate the laminate board presses. The waste oil
<br />is hauled and recycled by Evergreen Environmental Services, 6880 Smith Avenue,
<br />Newark, California, 94560. LIKA generated .84 tons of waste oil in 1991 and .28 tons in
<br />1992.
<br />4. The wastewater treatment operation generates a filter press cake (sludge). This waste
<br />is transported to World Resources, 8113 W. Sherman Street, Phoenix, Arizona, 85403, for
<br />metal reclamation. LIKA manifested 237 tons of the metal sludge in 1991 and 216 tons
<br />in 1992.
<br />5. The gold plating bath is another source of hazardous waste. Potassium gold cyanide is
<br />the material used in this bath. Once the gold bath becomes contaminated either through
<br />regular use (changed not more than once per year) or by incidental mishaps, the bath
<br />must be changed and disposed of. The waste is hauled to Engelhard West, Inc., 5510
<br />E. La Palma Avenue, Anaheim, California, 92807, who reclaims the gold for return to LIKA,
<br />and disposes of the remaining cyanide waste. Historically, LIKA has maintained a
<br />microplate gold line and a deep gold Line. The deep gold line accommodated a full panel
<br />of a circuit board. The capacity of the deep gold bath was 30 gallons. in February of
<br />1992, the deep gold line became obsolete due to less demand for this type of product
<br />and was replaced with a selective gold plating. The selective bath is less than 10 gallons
<br />in capacity, and so less waste of this type is expected to be generated. In 1991, .64 tons
<br />of gold waste were generated, and in 1992, 1.4 tons were generated (due to the deep
<br />gold bath being taken off line).
<br />6. In 1992, LIKA classified their solder dross as hazardous waste. Originally, the solder
<br />contained tin and lead, and currently the solder only contains tin. The waste solder was
<br />hauled to E C S Refining, 705 E. Reed Street, Santa Clara, California, 95050, and 8.4 tons
<br />were manifested in 1992.
<br />7. Also in 1992, new equipment for mechanically applying the soldermask was installed.
<br />This created a solvent/soldermask overspray waste stream. Solvent is used to flush the
<br />lines of the spray application mechanism. The soldermask "overspray' is squeegeed and
<br />collected to be disposed of with the waste solvent. Safety Kleen hauled 3.4 tons of this
<br />waste to 1722 Cooper Creek Road, Denton, Texas, 76201, to be utilized in fuel blending
<br />for their cement kiln.
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