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Sequoia 680 C',esapeake Dnve Redwood Cuy CA 94063 (415) 364-9600 FA,((3 13) 364 9233
<br /> 404 N Wiget Lane Walnut Creek CA 94598 (5;0) 988 9600 FAX(SIO? 988 9673
<br /> Analytical 839 Sinker kvcnue Suite 3 Sacramento C-k 95834 (916) 921 9600 FAX(916) 921 0100
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<br /> Delta Environmental Consultantsx Client Project ID Unocal 5886,AStockton,CA x f 4
<br /> 3164 Gold Camp Dr, Suite 200 Matrix Soli x
<br /> Rancho Cordova, CA 95670
<br /> Attention Enc Holm QC Sample Group 6090208-16 Reported Sep 19, 1996
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<br /> QUALITY CONTROL DATA REPORT
<br /> ANALYTE Ethyl-
<br /> Benzene Toluene Benzene Xvtenes Diesel
<br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015 M
<br /> Analyst: C Lee C Lee C Lee C Lee C Lee
<br /> Concentration
<br /> Spiked: 0 20 mg/kg 0 20 mg/kg 0 20 mg/kg 0 60 mg/kg 7 5 mg/kg
<br /> LCS Batch#- LCS091696 LCS091696 LCS091696 LC5091696 LCS091096
<br /> Date Prepared, 09/16/96 09/16/96 09/16/96 09/16/96 09/10/96
<br /> Date Analyzed: 09/16/96 09/16/96 09/16/96 09/16/95 09/10/96
<br /> Instrument LD #, GCHP-1 GCHP-1 GCHP-1 GCHP-1 GCHP-3A
<br /> LCS %
<br /> Recovery: 100 104 106 106 101
<br /> Control Limits: 70-130 70-130 70-130 70-130 60-140
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<br /> MS/MSD
<br /> Batch#- 6090208 6090208 6090208 6090208 6090308
<br /> Date Prepared- 09/16/96 09/15/96 09/16/96 09/16/96 09/10/96
<br /> Date Analyzed; 09/16/96 09/16/96 09/16/96 09/16/96 09/10/98
<br /> Instrument I.D.#- GCHP-t GCHP-1 GCHP-1 GCHP-1 GCHP3A
<br /> Matnx Spike
<br /> % Recovery: 102 105 106 106
<br /> Matrix Spike
<br /> Duplicate %
<br /> Recovery 99 105 104 106
<br /> Relative %
<br /> Difference: 2.9 00 is 00
<br /> SEQUOIA ANALYT19AL Please Nate
<br /> The LCS is a control sample of known interterentfree matrix that is analyzect using the same reagents
<br /> preaaratron and anaiytical methods empioyeo for the samples Tete LCS o recovery cata is uses far
<br /> l L valicatron er samole paten results Due to matnx effects he CC limits for MS/MSD s are advisory cniv
<br /> %�Linda C Schneider and are not used to accept or relec•batch results Matrix Interference
<br /> Project Manager/Sacramento Laooratory
<br /> 60902080L-, <7>
<br />
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