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` / \ Sequoia 680 Chesapeake Drive Redwood Om CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> �,D 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Cllr Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> Blame Tech Services, Inc ' Client Project ID Chevron 9-8264 /970521-H3 v <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9705C27-03-04 Reported Jun 9, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch# GCO53097BTEX22A GC053097BTEX22A GC053097BTEX22A GC05309713TEX22A GCOSM97BTEX22A <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. A.Porter A.Porter A Porter A. Porter A Porter <br /> MS/MSD # 9705132609 9705132609 9705132609 9705132609 970582609 <br /> Sample Cone N D N 0 N D N D N D <br /> Prepared Date 5/30/97 5/30/97 5/30/97 5/30/97 5/30/97 <br /> Analyzed Date 5/30/97 5/30/97 5/30/97 5/30/97 5/30/97 <br /> Instrument I D #- GCHP22 GCHP22 GCHP22 GCHP22 GCHP22 <br /> Cone Spiked 10ug/L 10ug/L 10ug/L 30ug/L 60ug/L <br /> Result 90 88 90 25 46 <br /> MS %Recovery 90 88 so 87 77 <br /> Dup. Result 87 86 88 25 47 <br /> MSD % Recov - 87 86 88 83 78 <br /> RPD. 34 23 22 39 22 <br /> RPD Limit- 0-25 0.25 0-25 0-25 0-25 <br /> LCS #. BLK053097 BLK053097 BLK053097 BLK053097 BLK053097 <br /> Prepared Date: 5/30/97 5/30/97 5/30/97 5/30/97 5/30/97 <br /> Analyzed Date: 5/30/97 5/30/97 5/30/97 5/30/97 5/30/97 <br /> Instrument I D #: GCHP22 GCHP22 GCHP22 GCHP22 GCHP22 <br /> Cone Spiked- 10ug/L 10ug/L 10ug/L 30ug/L 60ug/L <br /> LCS Result. 94 93 95 28 49 <br /> LCS % Recov - 94 93 95 93 82 <br /> 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 /> JPJect <br /> A 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 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 /> Penner <br /> Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative 96 Difference 9705C27 BLA 44a <br />