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Project No.: W1895-88-01 <br /> Checked by: ACS <br />CORROSIVITY TEST RESULTS 625 CYPRESS AVENUE <br />SANTA ANA, CALIFORNIA <br />April 2024 Figure B21 <br />SUMMARY OF LABORATORY <br />POTENTIAL OF HYDROGEN (pH) AND RESISTIVITY TEST RESULTS <br />AASHTO T289 ASTM D4972 and AASHTO T288 ASTM G187 <br />Sample No. <br />B1+B3@0-5' <br />pH <br />8.7 <br />Resistivity <br />(ohm centimeters) <br />1500 (Corrosive) <br />SUMMARY OF LABORATORY CHLORIDE CONTENT TEST RESULTS <br />AASHTO T291 ASTM C1218 <br />B1+B3@0-5' <br />B1+B3@0-5' 0.000 S0 <br />TP2@0-3' 0.000 S0 <br />Sample No. <br />SUMMARY OF LABORATORY WATER SOLUBLE SULFATE TEST RESULTS <br />AASHTO T290 ASTM C1580 <br />Sample No.Water Soluble Sulfate <br />(% SO4)Sulfate Exposure <br />Chloride Ion Content (%) <br />0.022