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Sequoia nalytical 819 Striker Avenue, Suite 8 Sacramento, CA 95834 (916) 921-9600 FAX (916) 921 -0 100 ECMS Project: QBR-DEH Sampled: 10/1/99 P.O. Box 622228 Project Number: N/A Received: 10/6/99 Orangevale, CA 95662 Project Manager: Maureen Dogett Reported: 10/14/99 Conventional Chemistry Parameters by APHA/EPA Metltods/Quality Control Sequoia Analytical - Sacramento Date Spike Sample QC Reporting Limit Recov. RPD RPD Analyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes* Batch: 9100137 Date Prepared: 10/12/99 Extraction Method: General Preparation Duplicate 9100137-DUP1 5910132-01 pH 10/12/99 8.90 8.89 pH Units 20.0 0.112 Batch: 9100142 Date Prepared: 10/12/99 Extraction Method: General Preparation Duplicate 9100142-DUP1 S910072-01 pH 10/12/99 7.54 7.55 pH Units 20.0 0.133 Batch: 9100152 Date Prepared: 10/13/99 Extraction Method: General Preparation Blank 9100152-BLKI TRPH 10/13/99 ND mg/I 1.00 LCS 9100152 -BSI TRPH 10/13/99 2.00 2.18 mg/I 70.0-130 109 LCS Dup 9100152-BSDI TRPH 10/13/99 2.00 2.41 mg/l 70.0-130 121 30.0 10.4 Batch: 9100153 Date Prepared: 10/13/99 Extraction Method: General Preparation Blank 9100153-BLKI TRPH 10/13/99 ND mg/kg 25.0 LCS 9100153 -BSI TRPH 10/13/99 100 108 mg/kg 70.0-130 108 Matrix Spike 9100153 -MSI S910073-03 TRPH 10/13/99 5000 78000 33100 mg/kg 60.0-140 -898 1,D Matrix Spike Dup 9100153-MSDI S910073-03 'FRPI-I 10/13/99 5000 78000 33800 mg/kg 60.0-140 -884 30.0 1,D 1 Sequoia Analytical - Sacramento *Refer to end of report for text of notes and definitions. Paae 8 of 9