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819 Stoker Avenue,Suite 8 <br /> ' Sacramento,CP. -96M <br /> Sequoia (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical w .seciuoialabs.com <br /> Kleinfelder-Stockton Project: Helena Chemical <br /> Pject Number: 23-4850-60 Reported: <br /> ro1 <br /> 2825 East Myrtle Street <br /> Stockton CA,95205 Project Manager: Joe Zilles 04/22/02 13:14 <br /> Anions by EPA Method 300.0- Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2040207-General Preparation <br /> `Blank(2040207-BLKI) Prepared&Analyzed:04/16/02 <br /> Nitrate as N ND 0.23 mg/kg <br /> LCS(2040207-BSI) Prepared&Analyzed:04/16/02 <br /> Nitrate as N 10.5 0.23 mg/kg 11.3 92.9 80-120 <br /> Matrix Spike(2040207-MS1) Source:S204095-18 Prepared&Analyzed:04/16/02 <br /> Nitrate as N 2100 2.3 mg/kg 11.3 200 NR 75-125 QM-07a <br /> Matrix Spike Dup(2040207-MSDI) Source:S204095-18 Prepared&Analyzed:04/16/02 <br /> Nitrate as N 3340 2.3 mg/kg 11.3 200 NR 75-125 45.6 20 QM-07a <br /> Batch 2040247-General Preparation <br /> Blank(2040247-BLKI) Prepared&Analyzed:04/19/02 <br /> Nitrate as N ND 0.23 mg/kg <br /> LCS(2040247-BSI) Prepared&Analyzed:04/19/02 <br /> Nitrate as N 13.5 0.23 mg/kg 11.3 119 80-120 <br /> Matrix Spike(2040247-MS1) Source:S204095-50 Prepared&Analyzed:04/19/02 <br /> Nitrate as N 151 2.3 mg/kg 113 ND 133 75-125 QM-07a <br /> Matrix Spike Dup(2040247-MSDI) Source:S204095-50 Prepared&Analyzed:04/19/02 <br /> Nitrate as N 158 2.3 mg/kg 113 ND 139 75-125 4.53 20 QM-07a <br /> 1 <br /> I <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 21 of 24 - <br />