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Laboratories Inc. <br /> Environmental Testing Laboratory Since 1949 <br /> Shaw Project: Foothill Landfill <br /> 1 Reported: 02/11/2010 13:28 <br /> 1326 North Market Boulevard Project Number: 124591, Leachate <br /> Sacramento,CA 95834 Project Manager: Sheila Richgels <br /> Water Analysis (General Chemistry) <br /> Quality Control Report- Precision & Accuracy <br /> Control Limits <br /> Source Source Spike Percent Percent <br /> Constituent Batch ID QC Sample Type Sample ID Result Result Added Units RPD Recovery RPD Recovery Lab Quals <br /> Total Calcium BTB0388 Duplicate 1001582-02 120.92 119.92 mg/L 0.8 20 <br /> Matrix Spike 1001582-02 120.92 125.76 10.000 mg/L 48.4 75-125 A03 <br /> Matrix Spike Duplicate 1001582-02 120.92 132.09 10.000 mg/L 79.0 112 20 75-125 A03,Q02 <br /> Total Magnesium BTB0388 Duplicate 1001582-02 22.561 22.306 mg/L 1.1 20 <br /> Matrix Spike 1001582-02 22.561 31.674 10.000 mg/L 91.1 75-125 <br /> Matrix Spike Duplicate 1001582-02 22.561 32.421 10.000 mg/L 7.9 98.6 20 75-125 <br /> Total Sodium BTB0388 Duplicate 1001582-02 46.397 46.037 mg/L 0.8 20 <br /> Matrix Spike 1001582-02 46.397 54.853 10.000 mg/L 84.6 75-125 <br /> Matrix Spike Duplicate 1001582-02 46.397 57.640 10.000 mg/L 28.3 112 20 75-125 A03,Q02 <br /> Total Potassium BTB0388 Duplicate 1001582-02 2.6500 2.6382 mg/L 0.4 20 <br /> Matrix Spike 1001582-02 2.6500 12.666 10.000 mg/L 100 75-125 <br /> Matrix Spike Duplicate 1001582-02 2.6500 13.133 10.000 mg/L 4.6 105 20 75-125 <br /> Chloride BTB0419 Duplicate 1001673-01 7.4620 7.4250 mg/L 0.5 10 <br /> Matrix Spike 1001673-01 7.4620 113.30 101.01 mg/L 105 80-120 <br /> Matrix Spike Duplicate 1001673-01 7.4620 113.36 101.01 mg/L 0.1 105 10 80-120 <br /> Nitrate as N BTB0419 Duplicate 1001673-01 3.0640 3.0450 mg/L 0.6 10 <br /> Matrix Spike 1001673-01 3.0640 8.0909 5.0505 mg/L 99.5 80-120 <br /> Matrix Spike Duplicate 1001673-01 3.0640 8.1970 5.0505 mg/L 2.1 102 10 80-120 <br /> Sulfate BTB0419 Duplicate 1001673-01 5.1320 5.1510 mg/L 0.4 10 <br /> Matrix Spike 1001673-01 5.1320 107.93 101.01 mg/L 102 80-120 <br /> Matrix Spike Duplicate 1001673-01 5.1320 107.80 101.01 mg/L 0.1 102 10 80-120 <br /> Bicarbonate BTB0453 Duplicate 1001673-01 112.04 112.59 mg/L 0.5 10 <br /> Carbonate BTB0453 Duplicate 1001673-01 ND ND mg/L 10 <br /> Total Alkalinity as CaCO3 BTB0453 Duplicate 1001673-01 91.890 92.340 mg/L 0.5 10 <br /> Total Dissolved Solids @ 180 C BTB0511 Duplicate 1001692-01 2470.0 2490.0 mg/L 0.8 10 <br /> The results in this report apply to the samples analyzed in accordance with the chain of custoc{v docuneem.This analytical 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.bclabs.com Page 8 of 15 <br /> Certifications: California-ELAP Certification Number 1186; Nevada Administrative Code-NAC-445A <br />