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Laboratories Inc. I <br /> Environmental Testing Laboratory Since 1949 <br /> CB&I Reported: 08/19/2013 13:29 <br /> 180 Promenade Circle,Suite 320 Project: Foothill Landfill <br /> Sacramento,CA 95834 Project Number. 149269 <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 Qualls <br /> QC Batch ID: BWH0161 <br /> Chloride BWH0161-BS1 LCS 48.747 50.000 mg/L 97.5 90-110 <br /> Nitrate as N BWH0161-BS1 LCS 4.9200 5.0000 mg/L 98.4 90-110 <br /> Sulfate BWH0161-BS1 LCS 97.297 100.00 mg/L 97.3 90-110 <br /> QC Batch ID: BWH0325 <br /> Dissolved Calcium BWH0325-BSI LCS 9.6882 10.000 mg/L 96.9 85-115 <br /> Dissolved Magnesium BWH0325-BSI LCS 9.7031 10.000 mg/L 97.0 85-115 <br /> Dissolved Sodium BWH0325-BS1 LCS 9.3383 10.000 mg/L 93.4 85-115 <br /> Dissolved Potassium BWH0325-BS1 LCS 9.2529 10.000 mg/L 92.5 85-115 <br /> QC Batch ID: BWH0436 <br /> Total Dissolved Solids @ 180 C BWH0436-BSI LCS 535.00 586.00 mg/L 91.3 90-110 <br /> QC Batch ID: BWH0639 <br /> Total Alkalinity as CaCO3 BWH0639-BS3 LCS 100.41 100.00 mg/L 100 90-110 <br /> QC Batch ID: BWH0865 <br /> Total Alkalinity as CaCO3 BWH0865-BS3 LCS 98.130 100.00 mg/L 98:1 90-110 <br /> The results in this report apply to the samples 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 for the exclusive use of the submitting party.BC Laboratories,Inc.assumes no responsibility for report alteration,separation,detach ent or third pang interpretation <br /> 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.bciabs.com Page 31 of 33 <br />