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Sequoia 640 Chtraptake Drive Redwood City CA 94063 (415) 364.9600 FAX(415)364.9133 <br /> 404N Wieet Lane Walnut Creek,CA 94598 (310) 984 9600 FAX(3 to)936 %73 <br /> Analytical 119 Striker Avenue,Suite 8 Sacramento,CA 91834 (916) 911 9600 FAX(916)921 0100 <br /> SlalnO Tech ervlces, Inc, tient Prof ect ID, , Chevron 9-4183/980731-D2 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose,CA 95133 <br /> Attention, Jim Keller Work Order 9608098.01-04 Reported Aug13, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Chloro. <br /> benzene <br /> QC Batch#: GCC$o$98ac2oon OCo80B9-802006A OCo8062"Moo8A <br /> Analy. Method: EPA SM EPA BOZO EPA$020 <br /> Prop.Method: EPA 5030 EPA 0030 EPA t= <br /> Analyst: T Costello T,Costello T Costetio <br /> MS/MSD#: owe 11701 080841701 960811701 <br /> Sample Cone.: N a N D. N,D <br /> Prepared Date: 6/7/98 8/7/98 6/7/86 <br /> Analyzed Date: 8/8/98 s/s/98 a/8198 <br /> Instrument I.D.#: GCHPa GCHPS (3CHPB <br /> Cone.Spiked: 25p9/L 283rp/L 2SPg/L <br /> Result: 29 28 27 <br />• MS%Recovery: 118 112 108 <br /> Dup.Result: 98 28 27 <br /> MSD%Recov.: 112 112 1DS <br /> RPD: 35 00 00 <br /> RPD Limit: 826 0.95 &25 E <br /> LCS#: 13LK0BMS 13LK000 98 BLK"20 <br /> Prepared Date: AM" 11/8/69 8/$180 <br /> Analyzed Date: BMW 8/8/68 8/8/66 <br /> Instrument 104: 3CHP$ OCHPa GGHPB <br /> Cone.Spiked: 25Etp/L 21SA/L 26pp/L <br /> LOS Result: 28 27 26 <br /> LCS%Recov.: 112 tp8 100 <br /> 00-140 80.140 80.140 <br /> LCS 70.130 70.130 70.130 <br /> Control Limits <br /> sass Now <br /> The LCS Is a oontrol sample of known,Interfererlt,frse matrix that In analyzed using the same reagents, <br /> • SEQUOIA ANAL Y AL properat(on,and■nslyt(oal methods employed for the sample$ The matrix spike Is an atlquot of sample <br /> fortified with known quantlria of speeft oompounds and subjected to the entire ana"osd proudurs. If <br /> the reoowry of analytes from the matrix spike does not fall within specme0 control limits due to matrix <br /> Intarfaranw,the LCS facovery is to be used to validate the batoh <br /> Peggy Panne Oil M8-Matrix Sp( e,M4 D■MAS Duplicate.RPD=Fla s w ,renes <br /> Project Marla Pao:2 of 2 <br /> 11606068 BILA <2),, <br /> L4/5t 30vd ELLS E67, 90b S331AH38 H331 2XIV79 65 9: caam) 96 tL ony <br />