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12-18-1996 lu 17 510 689 1918 MPDS P 15 <br /> Sequoia 680 Chesapeake Drive Redwood Ory,CA 94063 (413) 564 9600 FAX(415)364 71113 <br /> 404N 00 Wan Lane Walma Cmgk CA 94591 1310) 993 96FAX(310)980-9673 <br /> Analytical 819 Striker Avemm Suite a Sacramento.CA 95154 (916) 923-9600 FAX(916)9214100 <br /> 4`fuIPC'Servlx:ee H A Cllen4 P'rojsct Its lrivcal 8 ,i t;SS Pacific Ave.Stat:ktarl" <br /> Z 2401 Stanwell Dr, Ste 300 Matrbt Liquid <br /> Yt Concord.CA 94620 <br /> c Attentlon Jarrel Crider ©C Sample Group 6111673-581 R@ported Doc 9, 1996; <br /> v v r. .. - . n v vv n ♦ vw n vx v.A v w ♦ vv r� T r .. ... L 1 w ry nn 4 i W r w . 5 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Efhyi Xylenee <br /> Benzene <br /> Method: EPA 5020 EPA®020 EPA 8= EPA 5020 <br /> Analyst: K Nil] K NIII K NIII K Nil <br /> MS/MSD <br /> Batch#' 8110908 6110008 5110808 6110805 <br /> Date Pr pan8d: 11/25/68 11/20/96 11/25/96 11/25/25 <br /> Date Analyzed. 11/26/60 11/28/00 11/28/85 11/26/66 <br /> Inetrument 1 D#: HP-2 HP-2 HP4 HP-2 <br /> Cone.Spiked. 29mg/L 201ep/L 20PO/L WOOL <br /> Matrix Spike <br /> %Recovery: 11a 116 125 120 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 120 120 130 123 <br /> Relative% <br /> Difference. 43 43 32 27 <br /> xs ti vww V <br /> LCS Batch#: 2LC6112M 21LC8112566 2LC$112095 2LCSI MINIS <br /> Data Repaired* 11/2a/95 11/20/95 11/26/96 11/28/90 <br /> Date Ar s"W: 11/26/00 11/26/95 11/25/90 11/25/96 <br /> Instrument I.D.*: HF-2 HP-2 HP-2 HP-2 <br /> LCS% <br /> Recovery; 120 120 130 125 <br /> Recovery <br /> Control Limits: 60.100 00-140 VD-140 50.140 <br /> awe Note <br /> The LC6Is a control sample of known,Interferent tree matrix that is analyzed using the same respenle, <br /> SEQUOIA ANALYTICAL,#1271 preparation,and analytical methods employed for the samplse The matrix spike Is an aliquot of sample <br /> loured with known quarttllles of apeeifio compounde and eu0jected to the entire analytical procedure it <br /> Signature an File the recovery of analytes from the matrix spike does not fall within specified control iirnite due to matrix <br /> Alan B Kemp nte <br /> irferer the LC8 reamm is to be used to validate the batch <br /> Project Manager <br /> 6111673 MPD Baa <br />