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Laboratories Inc. Environmental Testing Laboratory Since 1949 W Reported: 01/20/2012 16:23 80 Promenade Circle,Suite 320 Project: North County LF,SJ County Sacramento,CA 95834 Project Number: 139874 Leachate Project Manager: Sheila Richgels Water Analysis (General Chemistry) Quality Control Report - Precision &Accuracy Control Limits Source Source Spike Percent Percent Lab Constituent Type Sample ID Result Result Added Units RPD Recovery RPD Recovery Quals QC Batch ID: BVA0422 Used client sample: N Chloride DUP 1200289-01 102.13 102.47 mg/L 0.3 10 MS 1200289-01 102.13 154.54 50.505 mg/L 104 80-120 MSD 1200289-01 102.13 154.51 50.505 mg/L 0.0 104 10 80-120 Nitrate as N DUP 1200289-01 3.3460 3.3550 mg/L 0.3 10 MS 1200289-01 3.3460 8.8273 5.0505 mg/L 109 80-120 MSD 1200289-01 3.3460 8.8848 5.0505 mg/L 0.7 110 10 80-120 Sulfate DUP 1200289-01 24.853 24.750 mg/L 0.4 10 MS 1200289-01 24.853 136.61 101.01 mg/L 111 80-120 MSD 1200289-01 24.853 135.97 101.01 mg/L 0.5 110 10 80-120 QC Batch ID: BVA0523 Used client sample: N Bicarbonate DUP 1200397-01 12.424 12.059 mg/L 3.0 10 Total Alkalinity as CaCO3 DUP 1200397-01 10.190 9.8900 mg/L 3.0 10 QC Batch ID: BVA0544 Used client sample: Y-Description: L-1,01/09/2012 10:42 Total Dissolved Solids @ 180 C DUP 1200464-01 2440.0 2400.0 mg/L 1.7 10 QC Batch ID: BVA0638 Used client sample: N Chemical Oxygen Demand DUP 1200482-01 NO ND mg O/L 20 MS 1200482-01 ND 752.80 750.00 mg O/L 100 80-120 MSD 1200482-01 ND 750.63 750.00 mg O/L 0.3 100 20 80-120 QC Batch ID: BVA0686 Used client sample: Y-Description: L-1,01/09/2012 10:42 Total Calcium DUP 1200464-01 319.52 316.28 mg/L 1.0 20 MS 1200464-01 319.52 318.33 10.000 mg/L -11.9 75-125 A03 MSD 1200464-01 319.52 333.56 10.000 mg/L 4.7 140 20 75-125 A03 Total Magnesium DUP 1200464-01 158.71 157.46 mg/L 0.8 20 MS 1200464-01 158.71 163.88 10.000 mg/L 51.7 75-125 A03 MSD 1200464-01 158.71 170.12 10.000 mg/L 3.7 114 20 75-125 Total Sodium DUP 1200464-01 261.31 264.71 mg/L 1.3 20 MS 1200464-01 261.31 270.10 10.000 mg/L 87.8 75-125 MSD 1200464-01 261.31 288.73 10.000 mg/L 6.7 274 20 75-125 A03 Total Potassium DUP 1200464-01 2.8503 2.9089 mg/L 2.0 20 MS 1200464-01 2.8503 13.107 10.000 mg/L 103 75-125 MSD 1200464-01 2.8503 13.343 10.000 mg/L 1.8 105 20 75-125 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. 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. 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.bclabs.com Page 25 of 26