Laserfiche WebLink
kn KLEINFELDER <br /> s <br /> 1985 investigation, laboratory hydraulic conductivities of .01 to 630*10-5 cm/sec were <br /> reported for samples prior to remoulding. After remoulding, hydraulic conductivities as <br /> low as 3 x 10-9 cm/sec were reported. The hydraulic conductivities are shown on the fence <br /> diagram. Laboratory data sheets are included in Appendix B. <br /> The bulk hydraulic conductivity of the vadose zone may be less than the hydraulic <br /> conductivities of the samples collected due to cementation of the formation. Blow counts <br /> during drilling and sampling were generally more than 50 per six inches (see boring logs, <br /> Appendix B) indicating a well consolidated material. However, the cementation in the <br /> samples is likely to be compromised when the sample tube is pounded into the ground, <br /> thereby increasing the apparent hydraulic conductivity of the sample. <br /> 4.2.2 Pore Fluid Chemistry <br /> Table 4-2 summarizes the analytical results for samples collected from the vadose zone in <br /> three borings; B-1, B-2, and B-4. The samples were analyzed by performing a distilled <br /> • water leach following the protocol of the Waste Extraction Test Methodology, and then <br /> analyzing the leached fluid for metals and other inorganic constituents. The sample from <br /> B-4 is assumed to represent background pore fluid quality. The sample from B-1 _ <br /> represents pore-fluid in soil approximately 10 feet below one of the oldest areas of the <br /> landfill. The sample from B-2 represents pore fluid in soil approximately 20 feet below one <br /> of the youngest areas of the landfill. Chain-of-custody and analytical results for the soils <br /> samples are given in Appendix D. <br /> Organic <br /> No organic constituents were detected in the soil samples above the reporting limits of the <br /> analytical laboratory. <br /> Metals <br /> Low concentrations of five metals; aluminum, iron, titanium, vanadium, and zinc were <br /> present in the background soil sample from B-4. Only two of these metals, iron and <br /> • titanium,were present in the vadose zone sample from B-2. Only two metals that were not <br /> detected in the background sample were reported in the vadose zone sample from B-1: <br /> manganese and boron. <br /> FOOTHILL 24 <br />