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Sequoia 680 Chesapeake Drove 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 /> X1,1 Analytical 819 Stroke,Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)911 0100 <br /> i <br /> Gettler Ryan/Geostrategles Client Project ID Chevron 9-6171, Stockton <br /> 6747 Sierra Court, Ste G Matrix Liquid <br /> Dublin, CA 94568 <br /> Attention Argy Leyton Work Order# 95051-04-04-06 Reported .Jun 7, 1995}} <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch# GCO60595BTEX02A GC060595BTEX02A GC060595BTEX02A GCO605953TEX02A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst J Minkel J Minkel J Minkel J Minkel <br /> MS/MSD # 950519002 950519002 950519002 950519002 <br /> Sample Cone ND N D ND N D <br /> Prepared Date 6/5/95 6/5/95 6/5/95 6/5/95 <br /> Analyzed Date 6/5/95 6/5/95 6/5/95 6/5/95 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 <br /> Cone. Spiked 10 Ng/L 10 ug/L 10 u9/L 30 Ng/L <br /> Result 94 93 93 28 <br />�MS % Recovery 94 93 93 93 <br /> Dup Result 10 10 10 30 <br /> MSD % Recov 100 100 100 100 <br /> RPD 62 73 73 69 <br /> RPD Limit 0-50 0-50 0-50 0.50 <br /> Lvr{r, rv♦ + r . . . nvt, vv x vxrx {r„n,r 4 nn..mr 1 „}'.0 r. A mfr O„v { r . t;V♦ , 40 .n .�vr}.1 vui, i <br /> LCS ,'!`,f� <br /> Prepared Date <br /> Analyzed Date <br /> Instrument I D # <br /> Cone Spiked <br /> LCS Result <br /> LCS % Recov <br /> M M D <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-tree matrix that is analyzed using the same reagents, <br /> QU01A ANALYTICAL 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 /> M011�gory <br /> Project Manager "*MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 95051-04 GET <2> <br />