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Report of Results <br /> Investigation of Agricultural Chemicals in Soil <br /> PurtGroBrca Facility <br /> f 1905 North Broadway Ave-,Stockton,CA <br /> I <br /> Sierra-Pacific Project No,94-055.08 <br /> 6.0 CONCLUSIONS <br /> Physical soil types encountered during this investigation included primarily sandy silt, with lesser <br /> amounts of silty fine to medium-grained sand and some slightly clayey silt. The moisture content of <br />` these soils increases generally with depth. Local zones of mineral cementation are present, rendering <br /> thicknesses of up to i foot very hard. Effective soil permeability is generally low, ranging from 1.17 <br /> a <br /> x 10-6 to 3.10 x 10' centimeters per second, as measured by the`PTS Laboratories, Inc. <br /> f <br /> Soil at the Broadway Avenue site is generally impacted by nitrogen concentrations. Of the 40 samples <br /> f collected, only seven had total nitrogen concentrations less thana1,1100 mg/kg. While nitrogen as nitrate <br /> concentrations generally attenuate with depth, ammoniacal nitrogen,reflected in TKN values, shows no <br /> attenuation. HVOCs are not present in the areas investigated. <br /> i <br /> Y <br /> �l <br /> i <br /> i <br /> 1 , <br /> j <br /> i <br /> I <br /> Sierra-Pacific Groundwater Consultants, Inc. 13 <br /> s. <br /> li !� <br />