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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 /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> xv v vn <br /> Gettler Ryan/Geostrategies Client Project ID Chevron 9-6171, Stockton <br /> 6747 Sierra Court, Ste G Matrix Liquid <br /> Dublin, CA 94568 <br /> Attention Deanna Harding Work Order# 9511461-06, 07 Reported Nov 10, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC110995BTEX22A GCit0995BTEX22A GC110995BTEX22A GC110995BTEX22A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method- EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: A.Miralit A. Miralit A.Miralit A. Miralit <br /> MS/MSD#: 951143210 951143210 951143210 951143210 <br /> Sample Cone : N D N D N D N D <br /> Prepared Date: 11/9/95 11/9/95 11/9/95 11/9/95 <br /> Analyzed Date: 11/9/95 11/9/95 11/9/95 11/9/95 <br /> Instrument LD #: GCHP22 GCHP22 GCHP22 GCHP22 <br /> Cone. Spiked: 10ug/L 10ug/L 10ug/L 30ug/L <br /> Result: 10 96 97 28 <br /> &S % Recovery- 100 96 97 93 <br /> Dup Result 10 9 6 97 29 <br /> MSD % Recov. 100 96 97 97 <br /> RPD, 00 00 00 35 <br /> RPD Limit: 0-50 0-50 0-50 0-50 <br /> tK`•;`+h ,.,. ,.vv..,,^},,..,vh r:. .. w. `,. :t: - .,... , . r t. ,. ..»», 4 s,.M1 u ...v,.c. <br /> LCS #: BLK110995 BLK110995 BLK110995 BLK110995 <br /> Prepared Date: 11/9/95 11/9/95 11/9/95 11/9/95 <br /> Analyzed Date: 11/9/95 11/9/95 11/9/95 11/9/95 <br /> Instrument I D #, GCHP22 GCHP22 GCHP22 GCHP22 <br /> Cone Spiked 10ug/L 10ug/L 10yg/L 30ug/L <br /> LCS Result 8 4 84 87 26 <br /> LCS %Recov.: 84 84 87 87 <br /> M M <br /> LCS 71-133 72-128 72-130 71-120 <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 /> SQUOIA A 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 /> interference,the LCS recovery is to be used to validate the batch <br /> Mike Gregory <br /> Project Manager "*MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9511461 GET <2> <br />