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Sequoia 8rvi <br /> Morgan Hill,,CAA95037037 <br /> (408)776-9600 <br /> a— ) <br /> Analytical FAX(408)782-6308 <br /> www.scquoialabicom <br /> Stratus Environmental Inc. Project: ARCO#5469,Stockton,CA MMC0495 <br /> 3330 Cameron Park Dr., Suite 550 Project Number: Arco#5469,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 03/28/03 15:43 <br /> Anions by EPA Method 300.0 - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source 6/6REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3C17030-General Preparation <br /> Blank(3C17030-BLK1) Prepared:03/12/03 Analyzed: 03/13/03 <br /> Phosphate(Ortho)as P ND 0.10 mg/l <br /> Nitrate as NO3 ND 0.50 <br /> Sulfate as SO4 ND 0.50 " <br /> Laboratory Control Sample(3C17030-BSI) Prepared:03/12/03 Analyzed: 03/13/03 <br /> Phosphate(Ortho)as P 2.36 0.10 mg/l 2.50 94.4 90-107 <br /> Nitrate as NO3 9.84 0.50 10.0 98.4 90-110 <br /> Sulfate as SO4 10.1 0.50 10.0 101 90-110 <br /> Alatrix Spike 3C17030-MS1) Source,MMC0495-02 Prepared:03/12/03 Analyzed:03/13/03 <br /> Phosphate(Ortho)as P 226 10 mg/l 250 ND 40.4 74-109 <br /> Nitrate as NO3 1030 50 1000 4.2 103 80-124 <br /> 0[fate as SO4 1 120 50 1000 20 110 72-140 <br /> Matrix Spike Dup(3C17030-MSD1) Source:MA4C0495-02 Prepared: 03/12/03 Analyzed:03/13/03 <br /> Phosphate(Ortho)as P 241 10 mg/1 250 ND 96.4 74-109 6.42 20 <br /> Nitrate as NO3 1040 50 1000 4.2 104 80-124 0.966 10 <br /> Sulfate as SO4 1130 50 1000 20 IN 1 72-140 0.889 10 <br /> i <br /> i <br /> Sequoia Analytical -Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document.Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety, <br /> 21 of 25 <br />