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— abo�°atories Inc. <br />Environmental Testing Laboratory Since 1949 <br />CB&I Reported: 02/07/2014 10:01 <br />180 Promenade Circle, Suite 320 Project: Foothill Landfill <br />Sacramento, CA 95834 Project Number: 139867 Leachate <br />Project Manager: Sheila Richgels <br />Water Analysis(General Chemistry) <br />Quality Control Report - Laboratory Control Sample <br />Control Limits <br />Spike Percent Percent Lab <br />Constituent QC Sample ID Type Result Level Units Recovery RPD Recovery RPD Quals <br />QC Batch ID: BXA1429 <br />Chloride <br />BXA1429-BS1 <br />LCS 53.213 <br />50.000 mg/L <br />106 <br />90-110 <br />Nitrate as N <br />BXA1429-BSI <br />LCS 5.1500 <br />5.0000 mg/L <br />103 <br />90-110 <br />Sulfate <br />BXA1429-BS1 <br />LCS 106.27 <br />100.00 mg/L <br />106 <br />90-110 <br />QC Batch ID: BXA1482 <br />Total Alkalinity as CaCO3 <br />BXA1482-BS3 <br />LCS 99.950 <br />100.00 mg/L <br />100 <br />90-110 <br />QC Batch ID: BXA1565 <br />Total Dissolved Solids @ 180 C <br />BXA1565-BS1 <br />LCS 545.00 <br />586.00 mg/L <br />93.0 <br />90-110 <br />QC Batch ID: BXA1698 <br />Total Calcium <br />BXA1698-BS2 <br />LCS 10.743 <br />10.000 mg/L <br />107 <br />85-115 <br />Total Magnesium <br />BXA1698-BS2 <br />LCS 11.000 <br />10.000 mg/L <br />110 <br />85-115 <br />Total Sodium <br />BXA1698-BS1 <br />LCS 10.071 <br />10.000 mg/L <br />101 <br />85-115 <br />Total Potassium <br />BXA1698-BS2 <br />LCS 10.566 <br />10.000 mg/L <br />106 <br />85-115 <br />r <br />The results in this report apply to the samples <br />analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. <br />All results listed in this report are <br />for the exclusive use of the submitting party. BC Laboratories, <br />Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation. <br />4100 Atlas Court <br />Bakersfield, CA 93308 <br />(661) 327-4911 FAX (661) 327-1918 www.bclabs.com <br />Page 15 of 17 <br />