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LABORATORIES, INC. <br /> Lawrence&Associates Project: Neenah Paper Co. Reported: 02/13/2008 13:54 <br /> 2001 Market Street, Room 523 Project Number: 005194.02,T1 <br /> Redding,CA 96001 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 RecoveryRPD Recove Lab Quals <br /> Chloride <br /> BRA1803 Duplicate 0801368-08 55.033 54.975 mg/L 0.1 10 <br /> Matrix Spike 0801368-08 55.033 164.26 101.01 mg/L 108 80-120 <br /> Matrix Spike Duplicate 0801368-08 55.033 164.79 101.01 mg/L 0.9 _ 109 - 10 80-120 <br /> Nitrate as NO3 BRA1803 Duplicate 0801368-08 0.26118 0.23905 <br /> mg/L 8.8 10 _- - J <br /> Matrix Spike 0801368-08 0.26118 22.800 22.358 ni 101 80-120 <br /> Matrix Spike Duplicate 0801368-08 0.26118 22.903 22.358 mg/L 0 101 10 80-120 <br /> Sulfate <br /> -- — BRA1803 Duplicate 0801368-08 10.839 10.864 m9/L 0.2 10 <br /> 120 <br /> Matrix Spike 0801368-08 10.839 113.80 101.01 mg/L 102 80- <br /> Matrix Spike Duplicate0801368-08 10.839 114.16 101.01 mg/L 0 _ - 102 _ 10 80- 120 _ _ - <br /> Sodium BRB0073 Duplicate 0801368-01 81.394 81.063 mg/L 0.4 20 <br /> Matrix Spike 0801368-01 81.394 90.846 10.204 mg/L 92.6 85-115 <br /> Matrix Spike Duplicate 0801368-01 81.394 90.834 10.204 mg/L 0.1 92.5 - _ 20 85-115pH - <br /> BRB0081 Duplicate 0801368-01 7.5960 7.6210 pH Units 0.3 20 <br /> - — <br /> Electrical Conductivity @ 25 C BRB0119 Duplicate 0801256-01 22.000 22.000 umhos/cm 0 - - _ 10 <br /> Electrical Conductivity @ 25 C 8R60120 Duplicate 0801368-03 920.00 913.00 um0hos/cm 0.8 _- <br /> Total Dissolved Solids @ 180 C BRB0179 Duplicate 0801368-01 910.00 910.00 mg/L 0 10 - <br /> BC Laboratories 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 /> Pa e14 of 17 <br /> All results listed in this report are for the exclusive use of the submitting party.BC Laboratories,Inc.assumes no responsibility for repoR alteration,separation, detachment or third party interpretation. g <br /> 4100 Atlas Court•Bakersfield,CA 93308 •(661)327-4911 •FAX(661)327-1918 •www.bclabs.coln <br />