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Sequoia SeQ080 Chesapeake Drive Redwood City,CA 94063.0650) 364 9600 FAX(650)364-9233 <br /> 1 1 404[*i Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 StnkcrAvenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(9t6)921 0100 <br /> low <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-1848/980210-H1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9802604 -01-04 Reported Mar 4, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch# GCO22398802007A GCO22398802007A GCO22398802007A GCO22398802007A GCO22398802007A <br /> Anally 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 SL S L SL SIL S L <br /> MS/MSD # 98020508 98020508 98020508 98020508 - <br /> Sample Cone . N D N D N D N D <br /> Prepared Date 2/23/98 2/23/98 2/23/98 2/23/98 <br /> Analyzed Date. 2/23/98 2/23/98 2/23/98 2/23/98 <br /> Instrument I D # GC7 GC7 GC7 GC7 <br /> Cone Spiked. 20 ug/L 20 ug/L 20 ug/L 6D ug/L - <br /> Result 196 191 187 597 - <br /> MS % Recovery 98 96 94 100 - <br /> Dup Result 19 189 189 595 <br /> 40 MSD % Recov 95 95 95 99 - j <br /> RPD 31 11 11 034 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS # LCS022398 LCS022398 LCS022398 LCSM398 LCS022398 <br /> Prepared Date: 2/23/98 2/23/98 2/23/98 2/23/98 2/23/98 <br /> Analyzed Date 2/23/98 2/23/98 2/23/98 2/23/98 2/23/98 <br /> Instrument I D # GC7 GC7 GC7 GC7 GC7 <br /> Cone Spiked 20ug/L 20ug/L 20ug/L 60pg/L 50oug/L <br /> LCS Result 214 21 5 219 691 473 <br /> LCS % Recov 107 108 110 115 95 <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 /> SEQUOIA ANALYTICAL The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> Elap#2142 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 /> Peggy Pennef�'� <br /> Protect Manager **IVIS=Matrix Spike,MSD=MS Duplicate,RPD=Relative% Difference 9802604 BLA <1> <br /> I <br />