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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9133 <br /> 404 N Wtge[lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> Analytical 819 Striker Avenue,Suitt 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> v t 4 ` l ` , r ♦ } <br /> ryBlaine Tech Services, Inc Client Project ID Chevron 9-1918/950727-K2 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 8507162 -01 Reported Aug 8, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> GC Batch#' GC073195BTEX20A G0073195BTEX20A GC073195BTEX20A GC073195BTEX20A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst R Vincent R Vincent R Vincent R Vincent <br /> MS/MSD#: 9507H4311 9507H4311 9507H4311 9507H4311 <br /> Sample Conc ' N D N D N D N D <br /> Prepared Date. 7/31/95 7/31/95 7/31/95 7/31/95 <br /> Analyzed Date 7/31/95 7/31/95 7/31/95 7/31/95 <br /> Instrument 1 D # GCHP20 GCHP20 GCHP20 GCHP20 <br /> Conc Spiked- 10pg/L 10pg/L 10Ng/L 30 mg/L <br /> Result: 9 3 94 9 2 27 <br /> MS % Recovery 93 94 92 90 <br /> Dup Result- 9 5 9 6 9 3 28 <br /> MSD % Recov 95 96 99 93 <br /> RPD 21 21 11 36 <br /> RPD Limit, 0-50 0-50 0-50 0-50 <br /> LCS#' - - - - <br /> Prepared Date. - - - <br /> Analyzed Date - - - <br /> Instrument I D #: - - <br /> Conc.Spiked - - - - <br /> LCS Result - - <br /> LCS%Recov.. - - - - <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 /> SE AN LYTICAL 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 /> Peggy Penner <br /> Project Manager "•MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9507162 BLA <1> <br />