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Laboratories Inc. <br /> Environmental Testing Laboratory Since 1949 <br /> Shaw Project: Foothill Landfill Reported: 02/22/2010 12:27 <br /> 1326 North Market Boulevard Project Number: 124591 Groundwater <br /> Sacramento,CA 95834 Project Manager: Sheila Richgels <br /> Water Analysis (General Chemistry) <br /> Quality Control Report- Laboratory Control Sample <br /> Control Limits <br /> Spike Percent Percent <br /> Constituent Batch ID QC Sample ID QC Type Result Level PQL Units Recovery RPD Recovery RPD Lab Quals <br /> Chloride BTS0419 BTB0419-BS1 LCS 102.52 100.00 0.50 mg/L 103 90-110 <br /> Nitrate as N BTB0419 BTB0419-BS1 LCS 5.0500 5.0000 0.10 mg/L 101 90-110 <br /> Sulfate BTB0419 BTB0419-BS1 LCS 100.90 100.00 1.0 mg/L 101 90-110 <br /> Total Alkalinity as CaCO3 BTB0453 BTB0453-BS3 LCS 99.650 100.00 4.1 mg/L 99.6 90-110 <br /> Calcium BTB0456 BT60456-BS1 LCS 9.8834 10.000 0.10 mg/L 98.8 85-115 <br /> Magnesium BTB0456 BTB0456-BSI LCS 10.125 10.000 0.050 mg/L 101 85-115 <br /> Sodium BTB0456 BTB0456-BS1 LCS 10.045 10.000 0.50 mg/L 100 85-115 <br /> Potassium BTB0456 BTB0456-BS1 LCS 9.7046 10.000 1.0 mg/L 97.0 85-115 <br /> Total Dissolved Solids @ 180 C BTB0913 BTB0913-BSI LCS 565.00 586.00 50 mg/L 96.4 90-110 <br /> The results in this report apply to the samples analyzed in accordance with the chain orcusiody document.This analvrical report must be reproduced in its entirety. <br /> All results listed in this report are for the exclusive use of the submitting parry. 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.bdabs.com Page 39 of 47 <br /> Certifications: California-ELAP Certification N0 <br /> 186; Nevada Administrative Code-NAC-445A 0 <br />