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Laboratories, ies, Inc. <br />Environmental Testing Laboratory Since 1949 <br />Shaw Reported: 02/10/2011 10:42 <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: BUA1644 <br />Total Dissolved Solids @ 180 C <br />BUA1644-BS1 <br />LCS <br />550.00 <br />586.00 <br />mg/L <br />93.9 <br />90-110 <br />QC Batch ID: BUA1657 <br />Chloride <br />BUA1657-BSI <br />LCS <br />105.00 <br />100.00 <br />mg/L <br />105 <br />90-110 <br />Nitrate as N <br />BUA1657-BS1 <br />LCS <br />5.0840 <br />5.0000 <br />mg/L <br />102 <br />90-110 <br />Sulfate <br />BUA1657-BS1 <br />LCS <br />103.78 <br />100.00 <br />mg/L <br />104 <br />90-110 <br />QC Batch ID: BUA1703 <br />Total Alkalinity as CaCO3 <br />BUA1703-BS3 <br />LCS <br />97.820 <br />100.00 <br />mg/L <br />97.8 <br />90-110 <br />QC Batch ID: BUB0148 <br />Total Calcium <br />BUB0148-BSI <br />LCS <br />10.128 <br />10.000 <br />mg/L <br />101 <br />85-115 <br />Total Magnesium <br />BUB0148-BS1 <br />LCS <br />10.110 <br />10.000 <br />mg/L <br />101 <br />85-115 <br />Total Sodium <br />BUB0148-BS1 <br />LCS <br />10.424 <br />10.000 <br />mg/L <br />104 <br />85-115 • <br />Total Potassium <br />BUB0148-BS1 <br />LCS <br />10.249 <br />10.000 <br />mg/L <br />102 <br />85-115 <br />• <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, detachment or thud party interpretation <br />4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 wwwv.bciabs.com Page 14 of 16 <br />