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Sequoia 680 Chesapeake Drive Redwood Gry,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 /> 6) <br /> %70 Analytical 619 Striker Avenue,Suite B Sacramento,CA 95834 (916) 921 9600 FAX(9 16)921-4100 <br /> Blame Tech Services, Inc x ' 3 Client Project ID+ Chevron 9-8264 1970107-Z2 N ry <br /> 1680 Rogers Avenue Matrix Liquid <br /> w San Jose, CA 95112 <br /> ,Attention Fran Thle Work Order# 9701261-01 Reported Jan 16, 1997" <br /> QUALITY CONTROL DATA REPORT <br /> Analyte' 1,2,4-Trichloro- 4-Chloro-3- Acenaphthene 4-Nitrophenol <br /> benzene Methylphenol <br /> QC Batch# MS0107978270EXA MS0107978270EKA MS0107978270EXA MS010797827DEKA <br /> Analy Method EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Prep Method. EPA 3510 EPA 3510 EPA 3510 EPA 3510 <br /> Analyst- E Manuel E Manuel E Manuel E Manuel <br /> MS/MSD#. BLK010797 BLK010797 BLK010797 BLK010797 <br /> Sample Conc N D ND N D ND <br /> Prepared Date 1/7/97 1/7/97 1/7/97 1/7/97 <br /> Analyzed Date 1/8/97 1/8/97 1/8/97 1/8/97 <br /> Instrument I D.#' F4 F4 F4 F4 <br /> Conc.Spiked 200ug/L 200pg/L 200 ug/L 200 ug/L <br /> Result, 137 155 140 52 <br /> MS % Recovery 69 78 70 26 <br /> Dup Result, 146 163 147 42 <br /> MSD % Recov 73 82 74 21 <br /> RPD: 64 50 49 21 <br /> RPD Limit: 0-30 0-30 0-30 0-30 <br /> LCS#. WBO10997 WBO10997 W8010997 WBO10997 <br /> Analyst, B Pitamah B Pitamah B Pitamah B Pitamah <br /> Prepared Date 1/9/97 1/9/97 1/9/97 1/9/97 <br /> Analyzed Date 1/12/97 1/12/97 1/12/97 1/12/97 <br /> Instrument I D # F4 F4 F4 F4 <br /> Conc. Spiked- 200pg/L 2Mpg/L 200 ug/L 200 ug/L <br /> LCS Result. 165 138 149 32 <br /> LCS %Recov- 83 69 75 16 <br /> LCS <br /> Control Limits 3998 23-97 46-118 10 to 80 <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SDggy, <br /> NALYTICAL 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 /> r 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 /> Pn **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference <br /> Panager Page 2 of 3 9701261 8LA 49> <br />