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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988-9673 <br /> IT) <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Iwo <br /> Cambria Client Project ID Shell 2575 Country Club Blvd <br /> 270 Perkins Avenue Matrix Solid <br /> f <br /> Sonoma, CA 95476 <br /> Attention Joe Neely Work Order# 9712705 -01-04 Reported Dec 31, 1997; <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#. GC1219976TEXEXA GC121997BTEXEXA GC121997BTEXEXA GC121997BTEXEXA GC1219978TE(EXA <br /> Analy Method. EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst J Minkel J Minkel J Minkel J Minkel J Minkel <br /> MS/MSD #: 971270504 971270504 971270504 971270504 971270504 <br /> Sample Cone , N D N D N 1) N D N D <br /> Prepared Date 12/19/97 12/19/97 12/19/97 12/19/97 12/19/97 <br /> Analyzed Date 12/20/97 12/20/97 12/20/97 12/20/97 12/20/97 <br /> Instrument I.D.#: GCHP22 GCHP22 GCHP22 GCHP22 GCHP22 <br /> Cone Spiked 0 20 mg/Kg 0 20 mg/Kg 0 20 mg/Kg 0 60 mg/Kg 1 2 mg/Kg <br /> Result 018 025 022 076 17 <br /> MS % Recovery: 90 125 110 127 142 <br /> Dup Result 020 023 020 073 19 <br /> MSD % Recov 100 115 100 122 158 <br /> RPD: 11 83 95 40 11 <br /> RPD Limit 0-25 0-25 0-255 0-25 0-25 <br /> LCS # BLK121997 BLK121997 BLK121997 BLK121997 BLK121997 <br /> Prepared Date: 12/19/97 12/19/97 12/19/97 12/19/97 12/19/97 <br /> Analyzed Date- 12/20/97 12/20/97 12/20/97 12/20/97 12/20/97 <br /> Instrument 1.13 #. GCHP22 GCHP22 GCHP22 GCHP22 GCHP22 <br /> Cone Spiked: 0 20 mg/Kg 0 20 mg/Kg 0 20 mg/Kg 0 60 mg/Kg 1 2 mg/Kg <br /> LCS Result- 019 019 019 054 12 <br /> LCS % Recov.. 95 95 95 90 100 <br /> 60-140 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> 0E000IA ARALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> 05 the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> egory <br /> Project Manager **MS=Matnx Spike,MSD=MS Duplicate, RPD=Relative%Difference 9712705 CCC <1> <br />