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Laboratories .Inc. <br /> Environmental Testing Laboratory Since 1949 <br /> W Reported: 01/20/2012 16:23 <br /> 180 Promenade Circle,Suite 320 Project: North County LF,SJ County <br /> Sacramento,CA 95834 Project Number: 139874 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: BVA0422 <br /> Chloride BVA0422-BS1 LCS 51.319 50.000 mg/L 103 90-110 <br /> Nitrate as N BVA0422-BSI LCS 5.0280 5.0000 mg/L 101 90-110 <br /> Sulfate BVA0422-BSI LCS 105.95 100.00 mg/L 106 90-110 <br /> QC Batch ID: BVA0523 <br /> Total Alkalinity as CaCO3 BVA0523-BS3 LCS 101.17 100.00 mg/L 101 90-110 <br /> QC Batch ID: BVA0544 <br /> Total Dissolved Solids @ 180 C BVA0544-BS1 LCS 560.00 586.00 mg/L 95.6 90-110 <br /> QC Batch ID: BVA0638 <br /> Chemical Oxygen Demand BVA0638-BSI LCS 748.47 750.00 mg OIL 99.8 85-115 <br /> QC Batch ID: BVA0686 <br /> I Calcium BVA0686-BSI LCS 11.062 10.000 mg/L 111 85-115 <br /> I Magnesium BVA0686-BS2 LCS 10.625 10.000 mg/L 106 85-115 <br /> Total Sodium BVA0686-BS1 LCS 10.328 10.000 mg/L 103 85-115 <br /> Total Potassium BVA0686-BSI LCS 10.520 10.000 mg/L 105 85-115 <br /> 0 <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 third party interpretation. <br /> 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.bciabs.com Page 24 of 26 <br />