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The Circuit Works manufacturing plant originated in San Jose and became incorporated in 1977. It <br /> moved to the Stockton location in 1983,where the headquarters have been located ever since. <br /> The 57,000 sq. ft. Circuit Works facility is located in a business park in Stockton, California,with the <br /> approximately 300 employees. <br /> VI. HAZARDOUS WASTE ACTIVITY DESCRIPTION: <br /> On January 3, 1990, Kasey Foley and I made contact with Dr. Luther Vaaler, and Randy Rodriguez, of <br /> Circuit Works. We began the inspection at a conference table with Dr. Vaalar explaining the complex <br /> process of circuit board manufacturing, and it's associated hazardous waste streams. <br /> Dr. Vaaler explained several processing steps which generated hazardous waste. He first described the <br /> development of the "inner board", which creates the initial printed circuit board on a copper sheet. The <br /> development of the "inner board" creates basically two different types of wastes, 1) an etching waste, and <br /> 2) a stripping waste. <br /> The etching waste is created by the use of amines,which is used to remove the copper from the circuit <br /> board. This waste is high in heavy metals. <br /> The stripping process requires the use of amines and caustics to strip the protective coating off the <br /> photographic image on the unfinished circuit board. The stripping waste of high pH contains copper and <br /> an organic protectant. <br /> The next step in circuit board manufacturing involves the "lamination process",where the copper sheet is <br /> laminated to the epoxy board. Dr. Vaaler stated that some solvent waste is generated in this process. <br /> Wet processing follows the lamination process. Wet processing involves plating, stripping, etching and <br /> rinsing processes which involve a variety of chemicals and the creation of a large complex waste stream. <br /> Circuit Works also has a maintenance shop and a machine shop. Both of these generate waste oil and <br /> waste solvents. <br /> VII. REPORT OF VIOLATIONS: <br /> A. Section 66508 (a),Title 22, California Code of Regulations (CCR). At the time of inspection <br /> some of the hazardous waste storage containers were not properly labeled with accumulation start <br /> dates. <br /> B. Section 67243 (a), Title 22, CCR. At the time of inspection, the waste oil bin was uncovered and <br /> open to the environment. <br /> C. Section 66493, Title 22, CCR. At the time of inspection, a Biennial Report had not been <br /> prepared for DHS. <br /> D. Section 67105,Title 22, CCR. At the time of inspection, personnel records did not show a <br /> verification of training and required experience for employees who work with hazardous waste. <br /> 3 <br />