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ea ,kx <br /> WQ <br /> IM11-11 <br /> x:' 3 <br /> h4 • .5 S3 <br /> 'h` .5En <br /> 1-1 <br /> � r <br /> Addendum B to the Soil and Groundwater Investigation Workplan <br /> for the Manna Pro facility at 4004 El Dorado Street,Stockton <br /> Additional borings are proposed to further define the extent of soil and <br /> groundwater contamination at the Manna Pro facility. The attached figure <br /> shows the locations of these proposed borings as well as the borings <br /> installed during the periods November 8-9 and 13-15. Three borings will be <br /> installed to determine the extent of soil and groundwater contamination on <br /> the west and northeast sides of the excavation. One boring in the center of <br /> the excavation will determine the extent of soil contamination directly below <br /> the former tank locations. An additional boring will be installed south of <br /> the excavation in order to sample the groundwater with the hydropunch. <br /> Samples will be colle^ted at a minimum from depths of 35 and 40 feet below <br /> grade where soil conta_-nination has been observed in previous borings. <br /> Additional samples may'L',e collected for further characterization of any <br /> contamination observed during drilling activities. Hydropunch samples <br /> will be collected from all borings except borings drilled in the center of the <br /> excavation. <br /> y- Additional borings may be installed if necessary to define the full extent of <br /> _ the soil and groundwater contamination at this site. Any additional <br /> borings are anticipated to be located further north and northeast of the <br /> excavation and on the west edge of El Dorado Street if the initial borings <br /> encounter significant soil and/or groundwater contamination. <br /> by <br /> 29 November 1990 ERM V4 eat <br />