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acetate solution were determined by means of flame • <br />photometry. <br />Saturation Extracts <br />The volume of extract solution recovered under saturation <br />conditions is considerably smaller than when done at solids%::ater <br />ratio of i:l. After treatment of the interburden with water, <br />the extract solution was filtered to remove suspended solids, <br />and the resulting clear solution :aas transferred to a 250-m1 <br />flask, the an*_i-precipitant for CaC03 added, and the solution <br />diluted to full volume with boiled, deionized water. Following <br />dilution to final volume, the solution was divided and sub- <br />sequently analyzed for sodium, potassium, calcium, magnesium <br />and ammonium cation concentrations, as well as bicarbonate, <br />carbonate, sulfate, chloride, fluoride, phosphate, nitrite and <br />nitrate anions, by the same methods used to analyze e:ctracts <br />from the 1:1 extraction tests. pH and conductivity Caere measured • <br />on a portion of the diluted samples. <br />Geomascans <br />Portions of soil from A ~ B horizons were analyzed by <br />spark source mass spectrometry to determine the trace element <br />contents contained in the so-called topsoil. In this particular <br />type of scan, the limit of detection for various elements is <br />1 ppm, according to ACCU-LABS, who has contracted to perform <br />such analyses. ' <br />An additional set of interburden samples was also <br />tested for trace element contents and possible toxic elements <br />by means of the geomascan. Sample selections Caere based <br />on results from analyses of extraction solutions which shocaed <br />the greatest concentrations of soluble salts, not necessarily <br />at toxic levels but representing interburden most likely to • <br />release objectionable salts of knocan toxic elements into <br />run-off water that may ultimately find its way into underground <br />aquifers or surface streams. <br />