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Laboratories Inc. <br /> Environmental Testing Laboratory Since 1949 <br /> Reported: 01/25/2012 13:24 <br /> 0 Promenade Circle,Suite 320 Project: Foothill Landfill <br /> law <br /> cramento,CA 95834 Project Number. 139867 GW <br /> Project Manager: Sheila Richgels <br /> Water Analysis (General Chemistry) <br /> Quality Control Report - Precision & Accuracy <br /> Control Limits <br /> Source Source Spike Percent Percent Lab <br /> Constituent Type Sample ID Result Result Added Units RPD Recovery RPD Recovery Quals <br /> QC Batch ID: BVA0760 Used client sample: N <br /> Dissolved Calcium DUP 1200536-01 18.190 18.131 mg/L 0.3 20 <br /> MS 1200536-01 18.190 28.937 10.204 mg/L 105 75-125 <br /> MSD 1200536-01 18.190 29.088 10.204 mg/L 0.5 107 20 75-125 <br /> Dissolved Magnesium DUP 1200536-01 6.2495 6.2427 mg/L 0.1 20 <br /> MS 1200536-01 6.2495 16.762 10.204 mg/L 103 75-125 <br /> MSD 1200536-01 6.2495 16.878 10.204 mg/L 0.7 104 20 75-125 <br /> Dissolved Sodium DUP 1200536-01 803.31 799.77 mg/L 0.4 20 <br /> MS 1200536-01 803.31 816.20 10.204 mg/L 126 75-125 A03 <br /> MSD 1200536-01 803.31 805.84 10.204 mg/L 1.3 24.8 20 75-125 A03 <br /> Dissolved Potassium DUP 1200536-01 190.54 191.52 mg/L 0.5 20 <br /> MS 1200536-01 190.54 203.03 10.204 mg/L 122 75-125 <br /> MSD 1200536-01 190.54 201.37 10.204 mg/L 0.8 106 20 75-125 <br /> QC Batch ID: BVA0816 Used client sample: N <br /> rbonate DUP 1200685 04 190.32 192.17 mg/L 1.0 10 <br /> Carbonate DUP 1200685-04 ND ND mg/L 10 <br /> Total Alkalinity as CaCO3 DUP 1200685-04 156.09 157.61 mg/L 1.0 10 <br /> QC Batch ID: BVA0823 Used client sample: N <br /> Total Dissolved Solids @ 180 C DUP 1200676-01 965.00 960.00 mg/L 0.5 10 <br /> QC Batch ID: BVA0863 Used client sample: Y-Description: MW-4,01/11/2012 10:24 <br /> Chloride DUP 1200695-01 6.5670 6.5220 mg/L 0.7 10 <br /> MS 1200695-01 6.5670 59.099 50.505 mg/L 104 80-120 <br /> MSD 1200695-01 6.5670 59.237 50.505 mg/L 0.2 104 10 80-120 <br /> Nitrate as N DUP 1200695-01 1.7470 1.7170 mg/L 1.7 10 <br /> MS 1200695-01 1.7470 6.8434 5.0505 mg/L 101 80-120 <br /> MSD 1200695-01 1.7470 6.8798 5.0505 mg/L 0.5 102 10 80-120 <br /> Sulfate DUP 1200695-01 8.3490 8.2600 mg/L 1.1 10 <br /> MS 1200695-01 8.3490 112.41 101.01 mg/L 103 80-120 <br /> MSD 1200695-01 8.3490 112.35 101.01 mg/L 0.0 103 10 80-120 <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.bdabs.com Page 18 of 19 <br />