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Laboratories Inc. <br />Environmental Testing Laboratory Since 1949 <br />Shaw Reported: 02/22/2011 14:26 <br />180 Promenade Circle, Suite 320 Project: Foothill Landfill <br />Sacramento, CA 95834 Project Number. 139867 Groundwater <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 />:onstituent QC Sample ID Type Result Level Units Recovery RPD Recovery RPD Quals <br />QC Batch ID: BUA1643 <br />Total Dissolved Solids @ 180 C <br />BUA1643-BS1 <br />LCS <br />570.00 <br />586.00 <br />mg/L <br />97.3 <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-BSI <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: BUA1702 <br />Total Alkalinity as CaCO3 <br />BUA1702-BS3 <br />LCS <br />101.02 <br />100.00 <br />mg/L <br />101 <br />90-110 <br />QC Batch ID: BUB0198 <br />Dissolved Calcium <br />BUB0198-BS2 <br />LCS <br />9.7780 <br />10.000 <br />mg/L <br />97.8 <br />85-115 <br />Dissolved Magnesium <br />BUB0198-BS2 <br />LCS <br />10.080 <br />10.000 <br />mg/L <br />101 <br />85-115 <br />Dissolved Sodium <br />BUB0198-BS2 <br />LCS <br />9.4557 <br />10.000 <br />mg/L <br />94.6 <br />85-115 <br />• <br />Dissolved Potassium <br />BUB0198-BS2 <br />LCS <br />9.5071 <br />10.000 <br />mg/L <br />95.1 <br />85-115 <br />U <br />The results in this report apply to the samples analyzed in accordance with the chain ojcustody 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 third party interpretation. <br />4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.bclabs.com Page 34 of 36 <br />