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Sequoia 680 Chesapeake Redwood Cry,CA 94063 (6SO) 364-9600 FAX(6SO)364-9233 <br /> 404 N.Willett Lone WaIna Cmek,CA 9459E (510) 986-9600 FAX(510)968-9673 <br /> S� Analytical 619 S 61,c,Avenue,Solt,6 Sxramenw,CA 95834 (916) 9)1.9600 FAX(916)911t.0100 <br /> inTech Services Inc Gierit Pro)ed IDi 1 SNyepStock[ori <br /> Blae %90805 St <br /> 1680 Rogers Avenue MWIX: Liquid <br /> San Jose,CA 95112 <br /> Attention Fran This Work Order S: 9708341-01.02 Reported- Aug 13, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Ben2ene <br /> OC Batch#: GCO61197BTFX02A GC081197RTFX)ZA GC081197BTEX02A GCO811979TEX02A G00811978TEX02A <br /> Ana ly.Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA W15M <br /> Prep. Method: EPA SOW EPA 5030 EPA 5030 EPA S030 EPA 5030 <br /> Analyst: A.Mirahab A Mirahab A.Mirattab A Mirahab A Mirattab <br /> MS/MSD#: 9707133103 9707133103 97070310.3 870703103 9707G3103 <br /> Sample Cone.: N.D. N.D. N.D. N.D. N.D. <br /> Prepared Date: 8/11/97 8/11/97 8/11/97 8/11,197 8/11/97 <br /> Analyzed Date: 8/11/97 8/11%97 8/11/97 8/11/97 8/11/97 <br /> Instrument I.D.#: GCHP2 GCHP2 GCHP2 GCHP2 GCHP2 <br /> Cone.Spiked: 10pg/L 10pg/L 10yg/L 30 N9/L 60pg/L <br /> Result: 10 9.8 10 30 69 <br /> MS%Recovery: 100 98 100 100 115 <br /> Dup. Result: 9.5 9.2 9.4 26 66 <br /> MSD%Recov.: 95 92 94 93 110 <br /> RPD: 5.1 6.3 62 6.9 4.4 <br /> RPD Limit: 0.25 &25 0-25 &26 0-25 <br /> ............... <br /> LCS#: BLKOe1197 BLK081197 BLK081197 BLK081197 BLK081197 <br /> Prepared Date: 8/111/97 8/11/97 6/11/97 8/11/97 8/11/97 <br /> Analyzed Date: 8/11/97 8/11/97 8/11/97 8/11/97 8/11/97 <br /> Instrument I.D.#: GCHP2 GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc.Spiked: 10pg/L 10yg/L 10u9/L 30 p9/L fiO PgX <br /> LCS Result: 9.4 9.1 9.2 28 64 <br /> LCS%Recov.: 94 91 92 93 107 <br /> 60-140 60-140 60-140 60-140 60-140 <br /> LCS 70-130 7&130 70-130 70-130 ]&- <br /> Control Limits <br /> please Note: <br /> The LCS it at control sample of knovm,interferent-free matrix that is analyzed using the same reagents, <br /> SEQU IA A ALYTICAL 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. H <br /> the recovery of analytes from the matrix spike does not fall within specked control limits due to matrix <br /> `\L (ynn <br /> interference,the LCS reeovary is to be used to validate the batch. <br /> Sheila Project r -MS=Matrix Spike.MSD=MS Duplicate,RPD=Relative%Difference 9708341.81-A <3> <br /> ©L d WOdd VJdLP`Z L661—DL-8 <br />