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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> VEW Analytical 819 Str:ker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Gettler Ryan/Geostrategles Client Protect ID Chevron 9-6171, Stockton <br /> 6747 Sierra Court, Ste J Matrix Liquid <br /> Dublin, CA 94568 <br /> Attention Deanna Harding Work Order # 9608665 -02 -07 Reported Aug 27, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Nitrite Nitrate Sulfate Total <br /> Sulfite <br /> QC Batch# IN0813963000ACD IN0813963000ACD IN0813963000ACD IN081396377100A <br /> Analy Method EPA 300 0 EPA 300 0 EPA 300 0 EPA 377 1 <br /> Prep Method N A N A N A N A <br /> Analyst S Chin S Chin S Chin K Sims <br /> MS/MSD# 9608665-07 9608665-07 9608665-07 <br /> Sample Conc N D 97 68 <br /> Prepared Date 8/13/96 8/13/96 8/13/96 <br /> Analyzed Date 8/13/96 8/13/96 8/13/96 <br /> Instrument 1 D # INIC1 INIC1 INIC1 <br /> Conc Spiked 10 mg/L 100 mg/L 10 mg/L <br /> Result* 11 18 77 <br /> MS % Recovery 110 83 90 <br /> Dup Result 11 18 77 <br /> MSD % Recov 110 83 90 <br /> RPD 00 00 00 <br /> RPD Limit 0-30 0-30 0-30 <br /> LCS# LCS081396 LCS081396 LCS081396 IN081396 <br /> Prepared Date 8/13/96 8/13/96 8/13/96 8/13/95 <br /> Analyzed Date 8/13/96 8/13/96 8/13/96 8/13/96 <br /> Instrument I D # INIC1 INIC1 INIC1 MANUAL <br /> Conc Spiked 5 0 mg/L 10 mg/L 5 0 mg/L 10 mg/L <br /> LCS Result 51 95 so 84 <br /> LCS % Recov 102 96 100 84 <br /> 70-130 70-130 70-130 60-140 <br /> LCS 90-110 90-110 90-110 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 /> . SEQUOIA ALYTICAL 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 /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> i e Gregory interference,the LCS recovery is to be used to validate the batch <br /> Protect Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9608665 GET <2> <br /> r"� <br />