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Laboratories Inc. <br /> Environmental Testing Laboratory Since 1949 <br /> aw Reported: 01/25/2012 13:22 <br /> 0 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- 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: BVA0816 Used client sample: N <br /> Bicarbonate 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 /> to 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 /> QC Batch ID: BVA0978 Used client sample: N <br /> Total Calcium DUP 1200696-05 108.07 106.15 mg/L 1.8 20 <br /> MS 1200696-05 108.07 117.83 10.000 mg/L 97.7 75-125 <br /> MSD 1200696-05 108.07 120.41 10.000 mg/L 2.2 123 20 75-125 <br /> Total Magnesium DUP 1200696-05 37.050 36.345 mg/L 1.9 20 <br /> MS 1200696-05 37.050 47.142 10.000 mg/L 101 75-125 <br /> MSD 1200696-05 37.050 48.159 10.000 mg/L 2.1 111 20 75-125 <br /> Total Sodium DUP 1200696-05 141.55 139.83 mg/L 1.2 20 <br /> MS 1200696-05 141.55 152.89 10.000 mg/L 113 75-125 <br /> MSD 1200696-05 141.55 153.90 10.000 mg/L 0.7 124 20 75-125 <br /> Total Potassium DUP 1200696-05 3.7305 3.7174 mg/L 0.4 20 <br /> MS 1200696-05 3.7305 14.247 10.000 mg/L 105 75-125 <br /> MSD 1200696-05 3.7305 14.209 10.000 mg/L 0.3 105 20 75-125 <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 entirely. <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 16 of 17 <br />