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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiset lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> 4W Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Blaine Tn <br /> ech Services, Inc Client Protect ID Chevron 9-2033, 950815-H1 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 Reported Aug5, 1995 <br /> Attention Jim Keller Work Order# 9508B93-01 P 9 <br /> vwc .i x. n v. .n rr +• " <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. 1,2,4-Trichloro 4-Chloro-3 Acenaphthene 4-Nitrophenol <br /> benzene Methylpheno[ <br /> CC Batch# MW816958270EXZ MS0816958270EXZ MS0816958270EXZ MS0816958270EXZ <br /> Analy. Method' EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Prep Method EPA 3520 EPA 3520 EPA 3520 EPA 3520 <br /> Analyst B Pitamah B Pitamah B Pitamah B Pitamah <br /> MS/MSD#: 950893503 950893503 950893503 950893503 <br /> Sample Conc ND ND ND ND <br /> Prepared Date' 8/16/95 8/16/95 8/16/95 8/16/95 <br /> Analyzed Date. 8/17/95 8/17/95 8/17/95 8/17/95 <br /> Instrument I D #' F4 F4 F4 F4 <br /> conic Spiked. 100pg/L 100pg/L 100feg/L looug/L <br /> Result 87 87 85 77 <br /> .MS % Recovery* 87 87 85 77 <br /> Dup. Result. 79 80 79 75 <br /> MSD % Recov ` 79 so 79 75 <br /> RPD 96 84 73 26 <br /> RPD Limit. 0-50 850 0-50 0-50 <br /> LCS # BLK081695 BLKD81695 BLK081695 <br /> Prepared Date 8/16/95 8/16/95 8/16/95 - <br /> Analyzed Date* 8/17/95 8/17/95 8/17/95 - <br /> instrument I D-#. F4 F4 F4 - <br /> Conc.Spiked: 100Ng/L 100yg/L 100 fig/L - <br /> LCS Result- 21 11 22 <br /> LCS%Recov . 21 11 22 <br /> EM <br /> LCS 44-142 22-147 47-145 DL-132 <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 /> �SECd 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 It <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 /> egg enner **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Manager Page 2 of 3 950BB93 BLA <8> <br />