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0963c*-1 <br /> SITE SAFETY PLAN <br /> LIKA CORPORATION <br /> FIELD AVENUE ANNEX <br /> 1.0 INTRODUCTION <br /> Woodward-Clyde Consultants (WCC) has been contracted by the Lika <br /> Corporation, Stockton, California to conduct an investigation to <br /> verify and quantify contamination of groundwater, surface, and <br /> subsurface soils. The suspected contaminants are heavy metals such as <br /> copper, nickel, tin, lead, and low pH. <br /> 2.0 SITE DESCRIPTION <br /> The site is a warehouse-type structure, with approximately 13,800 <br /> square feet of floor space. It is located in Stockton, in a light <br /> industrial area, along the Stockton Deep Water Channel. The southern <br /> end of the site faces Field Avenue and there is a residential <br /> neighborhood across the street. <br /> The building was used as a printed circuit board manufacturing <br /> facility. Acid plating solutions containing copper and other heavy <br /> metals were used in the manufacturing process. Plating solution which <br /> spilled on the floor flowed to a pair of sumps where it was collected <br /> and discharged to the sewer. The acid in the plating solutions <br /> attacked the concrete floors and sumps. As a result, there are <br /> several places in the sumps where the walls have been breeched, <br /> allowing the copper-laden plating solutions to escape to the <br /> surrounding soil and possibly the groundwater as well. There are <br /> several places on the floor where the acid has penetrated through the <br /> floor. There are also seams and expansion joints in the floor which <br /> have been attacked by the acid and may have leaked. <br />