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' Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N VAget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Iwo Analytical 819 St"ker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, lnc' k Client Protect ID Chevron 9-1918/970207-H1 <br /> }1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> �Attentlon Fran Thie Work Order# 9702482 01-05 Reported Feb 20, 1997 t <br /> i <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch#: GCO21297BTEX06A G0021297BTEX06A GCO21297BTEX06A GCO21297BTEX06A <br /> Analy Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst. A.Porter A.Porter A. Porter A.Porter <br /> MS/MSD#: 970235108 970235108 970235108 970235108 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 2/12/97 2/12/97 2/12/97 2/12/97 <br /> Analyzed Date. 2/12/97 2/12/97 2/12/97 2/12/97 <br /> Instrument I D#: GCHP06 GCHP06 GCHP06 GCHP06 <br /> Conc Spiked 10ug/L 10pg/L 10Ng/L 30pg/L <br /> Result 11 11 12 36 <br /> •MS% Recovery. 110 110 120 120 <br /> Dup Result 12 13 13 39 <br /> MSD %Recov 120 130 130 130 <br /> RPD 87 17 80 60 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS# SLK021297 BLK021297 BLK021297 BLK021297 <br /> Prepared Date. 2/12/97 2/12/97 2/12/97 2/12/97 <br /> Analyzed Date 2/12/97 2/12/97 2/12/97 2/12/97 <br /> Instrument I D.# GCHP06 GCHP06 GCHP05 GCHP06 <br /> Conc.Spiked 10/ig/L 10ug/L 10ug/L 30ug/L <br /> LCS Result 12 12 13 38 <br /> LCS %Recov 120 120 130 127 <br /> 6x140 60-140 6x140 60-140 <br /> LCS 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 /> U I ANALYTICAL 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 it <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> ,Tnteffkrence,the LCS recovery is to be used to validate the batch <br /> eg Penner <br /> P j ct Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD-Relative%Difference 97024x2 BLA <1> <br />