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M. J. Schiff & Associates, Inc. <br />Consulting Corrosion Engineers - Since 1959 1291 N. Indian Hill Boulevard <br />Claremont, CA 91711-3897 <br />Phone 909.626.0967 <br />Table 1 - Laboratory Tests on Soil Samples <br />First American Title - MacArthur Place, Irvine, California <br />Your #1385.I, MJS&A #97246 <br />August 1,1997 <br />Sample ID B-1 B-1 B-5 <br />@ 2'@ 25'@ 2' <br />siltySoil Type <br />clay cia>clay <br />Resistivity Un its <br />as-received ohm-cm 1,700 440 610 <br />saturated ohm-cm 1,200 420 610 <br />PH 7.4 7.6 7.3 <br />Electrical <br />Conductivity mS/cm 0.27 132 0.69 <br />Chemical Analyses <br />Cations <br />calcium Ca2+ mg/kg 52 184 397 <br />magnesium Mg2. mg/kg 10 85 49 <br />sodium Na' + mg/kg 224 894 170 <br />Anions <br />carbonate (032- mg/kg ND ND ND <br />bicarbonate HCO31- mg/kg 207 281 207 <br />chloride Cl'-mg/kg 167 177 110 <br />sulfate SC)42. mg/kg 242 2,184 1,186 <br />Other Tests <br />sulfide S,-qual na na negative <br />Redox mv na na +215 <br />ammonium NH41* mg/kg na na na <br />nitrate N03 1- mg/kg na na na <br />Electrical conductivity in millisiemens/cm and chemical analysis were made on a 1:5 soil-to-water extract. <br />mg/kg = milligrams per kilogram (parts per million) of dry soil. <br />Redox = oxidation-reduction potential in millivolts <br />= not detected <br />not analyzed <br />docs97\97246.xls <br />ND <br />na = <br />Page 1 of I