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Sequoia 690 Chep<.ke Drive Redwood City;CA 94063 (415) 364-9600 FAX(415) 304-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 9459a (510) 989-9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue,Suite a Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0 100 <br /> 1-K <br /> ............... <br /> ........... ......... <br /> Blaine tech Services, Inc. Client Project ID: Chevron 9-0557 970520-H1 <br /> 1680 Rogers Avenue Matrix: Liquid <br /> San Jose, CA 95112 <br /> _Attention: Fran Thie Work Order#: 9705B17-07-08 Reported: Jun 5, 1997,; <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> OC Batch#: GC052397BTEX21A GCO52397BTEX21A GCO52397BTEX21A GO052397BTEX21A G0052397BTEX03A <br /> Ana ly. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: D.Jirsa D.Jirsa D.Jirsa D.Jirsa D.Jirsa <br /> MS/MSD#: 970549102 970549102 970549102 970549102 970549102 <br /> Sample Conc.: N.D. N.D. N.D. N.D. N.D. <br /> Prepared Date: 5/23/97 5/23/97 5/23/97 5/23/97 5/23/97 <br /> Analyzed Date: 5/23/97 5/23/97 5/23/97 5/23/97 5/23/97 <br /> Instrument J.D.#: GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc. Spiked: 10pg/L 10,ug/L 10,ug/L 30 lig/L 60pg/L <br /> Result: 9.0 9.1 9.2 28 60 <br /> IVIS % Recovery: go 91 92 93 100 <br /> Dup. Result: 9.2 9.4 9.5 28 62 <br /> MSD % Recov.: 92 94 95 93 103 <br /> RPD: 2.2 3.2 3.2 0.0 3.3 <br /> RPD Limit: 0-25 0-25 0-25 0-25 0-25 <br /> .......... ...... <br /> X <br /> M. <br /> LCS #: BLK052397 BLK052397 BLK052397 BLK052397 BLK052397 <br /> Prepared Date: 5/23/97 5/23/97 5/23/97 5/23/97 5/23/97 <br /> Analyzed Date: 5/23/97 5123/97 5/23/97 5/23/97 5/23/97 <br /> Instrument I.D.#: GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc. Spiked: 10pg/L 10pg/L 101ig/L 30 pg/L 60pg/L <br /> LCS Result: 8.6 8.8 8.19 27 59 <br /> LCS %Recov.: 86 88 89 90 98 <br /> MS/MS5 60-140 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 70-130 <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 /> 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. if <br /> VWTecovery of analytes from the matrix spike does not fall Within specified control limits due to matrix <br /> !Ptenner interference,the LCS recovery is to be used to validate the batch. — <br /> Pro ct Manager MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 97051317.131-A 44> <br />