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Sequoia 680 Chesapeake Drive Redwood City,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 /> Analytical 819 Strikcr Avenue,Suite 8 Sacramento, CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> .......... <br /> Blaine Tech Services, 1,66. Client Project ID: Chevron 9-0557/970227-Hl <br /> 1680 Rogers Avenue Matrix: Liquid <br /> ,San Jose, CA 95112 <br /> ,:Attention: Fran Thle Work Order#: 9702F02-01, -03-04, -06-08 Reported: Mar 17, 1997:,',, <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#: GC030597STEX21A GCoMS97BTEX21A GC03059713TEX21A GCO30597BTEX21A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 6020 <br /> Prep. Method: EPA 5030 EPA SM EPA 5030 EPA 5030 <br /> Analyst: D.Jirsa D.Jirsa D.Jirsa D.Jlrsa <br /> MS/MSD #: 9702C5402 9702C5402 970205402 9702C5402 <br /> Sample Cone.: N.D. N.D. N.D. N.D. <br /> Prepared Date: 3/5/97 3/5/97 3/5/97 3/5/97 <br /> Analyzed Date: 3/5/97 3/5/97 3/5/97 3/5/97 <br /> Instrument I.D.#: GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc. Spiked: 10 pg/L lopg/L 10pg/L 30pg/L <br /> Result: 9.7 9.7 9,8 30 <br /> MS % Recovery: 97 97 98 100 <br /> Dup. Result: 9.2 9.1 9.2 28 <br /> MSD % Recov.: 92 91 92 93 <br /> RPD: 6.3 6.4 6.3 6.9 <br /> RPD Limit: 0-25 0-25 0-25 0-25 <br /> ;IX <br /> .............. .. <br /> LCS #: BLK030597 BLK030597 BLK030597 BLK030597 <br /> Prepared Date: 3/5/97 3/5/97 3/5/97 3/5/97 <br /> Analyzed Date: 3/5/97 3/5/97 3/5/97 3/5/97 <br /> Instrument I.D.#: GCHP21 GCHP21 GCHP21 GCHP21 <br /> Cone. Spiked: 10pg/L 10pg/L 10pg/L 30 pg/L <br /> LCS Result: 9.6 9.9 9.9 30 <br /> LCS % Recov.: 96 99 99 100 <br /> MS/MSD 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 <br /> Control Limlo <br /> Please Note: <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> IS UO(AA LYTICAL 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 /> 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 /> eg y enne <br /> J o M <br /> ct Manager MS;F:Matrix Spike,MSD=MS Duplicate,RPD=Relative 96 Difference 9702FO2.BLA <3> <br />