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1 <br /> IV. BACKGROUND: <br /> Indy Electronics had two episodes of hazardous waste spillage. The first occurred on June 24, 1987. <br /> A 25 gallon mixture of acid and heavy metal particles entered a storm drain after the container was <br /> ruptured This was diluted with waster and flushed down the drain. The second incident occurred <br /> on July 5, 1989. Again,acid and heavy metal mixture was spilled This was diluted with water and <br /> pumped out to an alfalfa field. Both incidents were documented and a Proposition 65 was completed. <br /> On March 2, 1988, PHS-EHD signed a Memorandum of Understanding with the State Department <br /> of Health Services authorizing PHS-EHD to perform hazardous waste generator inspection in San <br /> Joaquin County. <br /> Indy Electronics was identified as a large hazardous waste generator in 1987,and a routine inspection <br /> was conducted on April 25, 1990, by PHS-EHD. <br /> V. GENERAL DESCRIPTION of FACILIII': <br /> Indy is a subsidiary of Olin Corporation which operates 60 manufacturing plants in 13 countries. Olin <br /> produces chemicals, metals,electronic materials, and packages circuitry boards. They have contracts <br /> with the defense and aerospace industries and water quality management facilities. <br /> �'S� —l42a <br /> This facility encompasses 9.3 acres and employs �workers. The facility's building includes 76,000 <br /> square feet which is comprised of plating bath areas and offices;the surrounding land is undeveloped. <br /> The hazardous waste is collected at the main building and stored in a separate shed. <br /> Indy was established in Manteca,CA in 1981 and is involved in the electronic packaging of integrated <br /> circuits. They take electronic chips (in wafer form) and cut them out. Chips then go through an <br /> optional inspection and are sealed in plastic or ceramic packaging . Next they go through an <br /> electroplating bath to be coated with tin or dipped in solder. The final process is called"shear form" <br /> where machines knock the packaging out of the form and bend the leads enabling the device to fit <br /> in a particular electronic unit. <br /> Vi. HAZARDOUS WASTE ACTIVITY DESCRIMON: <br /> A. Electroplating baths create a wastewater sludge (filtercake) which precipitates the metals. <br /> This waste basically consists of acids and heavy metals. The filtercake is hauled by World <br /> Resources, 8113 W. Sherman Street, Phoenix, Arizona, 85042. <br /> B. Waste flammable liquids: Acetone and isopropyl alcohol are used for cleaning circuitry <br /> packages. Ink code markings are put on circuitry boards and acetone is used to test these <br /> permanent markings. The registered hazardous waste hauler,Romic Chemicals(of East Palo <br /> Alto, CA) hauls the waste from this procedure. <br /> C. The degreasing operation uses freon vapors to clean circuitry packages. The freon waste that <br /> is generated in this process is also hauled by Romic Chemical. <br /> &&Jview <br /> D. Waste oil is generated(from machine oil changes)and is hauled by California Environmental, <br /> Newark, CA. <br /> 2 <br />