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Laboratories Inc. , <br /> Environmental Testing Laboratory Since 1949 <br /> Lawrence&Associates Project: Neenah Paper Co. Reported: 04/20/2010 8:29 <br /> 3590 Iron Court Project Number: 005194-04 T3 <br /> Shasta Lake City,CA 96019 Project Manager: David Kirk <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 /> pH BTD0386 Duplicate 1004591-01 7.8200 7.8300 pH Units 0.1 20 <br /> Electrical Conductivity @ 25 C BTD0386 Duplicate 1004591-01 695.00 698.60 umhos/cm 0.5 10 <br /> pH BTD0387 Duplicate 1004645-03 7.3000 7.2700 pH Units 0.4 20 <br /> Electrical Conductivity @ 25 C BTD0387 Duplicate 1004645-03 1388.0 1375.0 umhos/cm 0.9 10 <br /> pH BTD0388 Duplicate 1004645-13 6.9600 6.9700 pH Units 0.1 20 <br /> Electrical Conductivity @ 25 C BTD0388 Duplicate 1004645-13 1597.0 1646.0 umhos/cm 3.0 10 <br /> pH BTD0389 Duplicate 1004645-23 7.8800 7.8800 pH Units 0 20 <br /> Electrical Conductivity @ 25 C BTD0389 Duplicate 1004645-23 732.50 727.50 umhos/cm 0.7 10 <br /> Sodium BTD0410 Duplicate 1004645-10 111.80 114.02 mg/L 2.0 20 <br /> Matrix Spike 1004645-10 111.80 124.90 10.204 mg/L 128 85-115 A03 <br /> Matrix Spike Duplicate 1004645-10 111.80 122.85 10.204 mg/L 17.0 108 20 85-115 <br /> Sodium BTD0414 Duplicate 1004645-20 61.794 62.667 mg/L 1.4 20 <br /> Matrix Spike 1004645-20 61.794 73.433 10.204 mg/L 114 85-115 <br /> Matrix Spike Duplicate 1004645-20 61.794 73.276 10.204 mg/L 1.4 113 20 85-115 <br /> Sodium BTD0415 Duplicate 1004645-28 115.68 119.91 mg/L 3.6 20 <br /> Matrix Spike 1004645-28 115.68 130.81 10.204 mg/L 148 85-115 A03 <br /> Matrix Spike Duplicate 1004645-28 115.68 130.38 10.204 mg/L 2.8 144 20 85-115 A03 <br /> Chloride BTD0471 Duplicate 1004645-10 91.809 90.610 mg/L 1.3 10 <br /> Matrix Spike 1004645-10 91.809 191.30 101.01 mg/L 98.5 80-120 <br /> Matrix Spike Duplicate 1004645-10 91.809 194.28 101.01 mg/L 3.0 101 10 80-120 <br /> Nitrate as N BTD0471 Duplicate 1004645-10 ND ND mg/L 10 <br /> Matrix Spike 1004645-10 ND 5.0313 5.0505 mg/L 99.6 80-120 <br /> Matrix Spike Duplicate 1004645-10 ND 5.0727 5.0505 mg/L 0.8 100 10 80-120 <br /> Sulfate BTD0471 Duplicate 1004645-10 70.769 71.751 mg/L 1.4 10 <br /> Matrix Spike 1004645-10 70.769 177.60 101.01 mg/L 106 80-120 <br /> Matrix Spike Duplicate 1004645-10 70.769 180.93 101.01 mg/L 3.1 109 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.bclabs.com Page 40 of 44 <br /> Certifications: California-ELAP Certification Number 1186; Nevada Administrative Code-NAC-445A <br />