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• Sequoia 660 Chesapeake Dnve Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988-9600 FAX(5 10)988 9673 <br /> Analytical 819 Sinker Avenue,Suite a Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> �ryes`r.`v• .. v ti J fx x s.rpx y .r Gn Y+aYv.!.^'.9 rG Fn's4invni n n . r .. n 4.x r <br /> o, <br /> n'Blame Tech Seanc , Inc Client�Prajeet ID 'Chevron 9-8264/970827-T1 <br /> 1680 Rogers Ave Matrix > <br /> San.lose, CA 95112 { <br /> S <br /> Attention Fran Thie ti Work Order# 9708E76-01 n n J Fn ,r ri Reported Sep 9, 1997A <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Chloro- <br /> Benzene <br /> QC Batch# 0 0 <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method. EPA 5030 EPA 5030 EPA 5030 <br /> Analyst J Minkel J Minkel J Minkel <br /> MS/MSD# 9708C60-os 9708C60-03 9708060-03 <br /> Sample Conc N D N D N D <br /> Prepared Date 9/2/97 9/2/97 9/2/97 <br /> Analyzed Date 9/2/97 9/2/97 9/2/97 <br /> Instrument 1 D # GCHP08 GCHP08 GCHP08 <br /> Conc Spiked- 25pg/L 25pg/L 25pg/L <br /> Result <br /> MS%Recovery <br />• Dup Result <br /> MSD % Recov <br /> RPD #DIV/01 #DIV/0t #DEV/01 <br /> RPD Limit 0-25 0-25 0-25 <br /> rr ' <br /> LCS # VBLK090297BS VBLK090297BS BLK090297BS <br /> Prepared Date 9/2/97 9/2/97 9/2/97 <br /> Analyzed Date 9/2/97 9/2/97 9/2/97 <br /> Instrument I D #. GCHP08 GCHP08 GCHP08 <br /> Conc Spiked 25pg/L 25pg/L 25pg/L <br /> LCS Result <br /> LCS % Recov: <br /> 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note <br /> UPeneThe LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> r <br /> yTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantitiesof specific compounds and subjected to the entire analytical procedure If <br /> e recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> in erference,the LCS recovery is to be used to validate the batch <br /> MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference <br /> Project Manager Page 2 of 2 9708E76 BLA <12, <br />