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Sunland Analytical <br /> 11419 Sunrise Gold Circle,#10 <br /> Rancho Cordova,CA 95742 <br /> (916)852-8557 <br /> Date Reported 11/17/2021 <br /> Date Submitted 11/11/2021 <br /> To: Lauren Becker <br /> Engeo Inc. <br /> 17278 Golden Valley Pkwy <br /> Lathrop, CA 95330 <br /> From: Gene Oliphant, Ph.D. \ Randy Horney�� <br /> General Manager \ Lab Manager <br /> The reported analysis was requested for the following location: <br /> Location : 15188.000.006 Site ID : EAST SIDE CR-2. <br /> Thank you for your business. <br /> * For future reference to this analysis please use SUN # 86127-179475. <br /> ------------------------------------------------------------------------------- <br /> EVALUATION FOR SOIL CORROSION <br /> Soil pH 7.70 <br /> Moisture 6.8 % <br /> Minimum Resistivity 1.05 ohm-cm (x1000) <br /> Chloride 42.5 ppm 00.00425 % <br /> Sulfate 76.1 ppm 00.00761 % <br /> Redox Potential (+) 240 my <br /> Sulfides Presence - NEGATIVE <br /> METHODS <br /> pH and Min.Resistivity CA DOT Test #643 Mod. (Sm.Cell) <br /> Sulfate CA DOT Test #417, Chloride CA DOT Test #422m <br /> Redox Potential ASTM G-200m, Sulfides AWWA C105/A25.5 <br />