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Geofogicaf Technics Inc. <br /> 2741 River Road <br /> ' Modesto,Cafifornia 95351 <br /> (209)538-6424/jax#538-5852 <br /> ' Work Plan <br /> ' Phase II Environmental Site Assessment <br /> Fortifiber <br /> ' APN 233-460-07 <br /> 501 E. Acacia St, <br /> Tracy, California <br /> tProject No. 709.2 <br /> December 7, 1998 <br /> 1.0 INTRODUCTION <br /> ' In October of 1998, Geological Technics Inc. performed a Phase I ESA at the above <br /> referenced site. As a result of this Phase I several areas of concern were identified that will <br /> ' require sample collection and testing to address. These areas are listed below: <br /> Former Aboveground Stage Tanks (ASTs) <br /> Observations <br /> ' • Four large ASTs (two 20,000 gallon and two 15,000 gallon) were located on the west side <br /> of the boiler house, north of the manufacturing building. These tanks were used to store <br /> both asphalt and glue (hot melt) for the paper manufacturing process. The contents of <br /> ' these tanks were heated to maintain the proper viscosity. For fire safety purposes, the <br /> tanks were placed in two secondary containment units that consisted of concrete walls <br /> approximately four feet high. The floors of the secondary containment units were not <br /> lined and consist of gravel over native soil. <br /> ' • Evidence observed during the site review performed on September 23, 1998 suggests that <br /> these secondary containment units were also used as storm water retention basins. This is <br /> discussed further under Storm Water Management. <br /> ' • These tanks were removed in January 1995 and the associated piping and boiler system <br /> decommissioned. During this process of removing the tanks and closing down the paper <br /> mill, the stained soil from one of these units was excavated. This is discussed further <br /> under Soil Cleanup. <br /> Conclusions <br /> Since the soil was not tested during the cleanup work, it may be possible that contamination <br /> ' is still present in the soil beneath the former ASTs. <br /> Recommendations <br /> The soil in the two secondary containment units should be tested for petroleum products and <br /> ' hazardous chemicals. <br />