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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364-9233 <br /> Sequoia 404 N Wiget Lane walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707) 792-1865 FAX(707)792-0342 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-8264/ 981124-J2 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Christine Lillie Work Order# 9811 H50-01 Reported Dec 22, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 2 4-Dinctro- Pentachloro Pyrene <br /> toluene phenol <br /> QC Batch# MS1130988270EXA MS1130988270EXA MS1130988270EXA <br /> Analy Method EPA 8270 EPA 8270 EPA 8270 <br /> Prep Method EPA 3510 EPA 3510 EPA 3510 <br /> Analyst E Manuel E Manuel E Manuel <br /> MS/MSD # 9811F3608 9811 F3608 9811F3608 <br /> Sample Conc ND ND N D <br /> Prepared Date 11/30/98 11/30/98 11/30/98 <br /> Analyzed Date 12/2/98 12/2/98 12/2/98 <br /> Instrument I D # H5 H5 H5 <br /> Conc Spiked 200 yg/L 200 ug/L 200 ug/L <br /> Result 143 177 149 <br /> MS % Recovery 72 89 75 <br /> Dup Result 141 178 141 <br /> MSD % Recov 71 89 71 <br /> RPD 14 056 55 <br /> RPD Limit 0-30 0-30 0-30 <br /> LCS # LCS113098 LCS113098 LCS113098 <br /> Prepared Date 11/30/98 11/30/98 11/30/98 <br /> Analyzed Date 12/2/98 12/2/98 12/2/98 <br /> Instrument I D # H5 H5 H5 <br /> Conc Spiked 200 pg/L 200 ug/L 200,ug/L <br /> LCS Result 106 125 105 <br /> LCS % Recov 53 63 53 <br /> LCS <br /> Control Limits 24-96 9-103 26-127 <br /> Please Nate <br />. The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SE1Q1U0 YTICAL 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 /> Ory **MS=Matrix Spike, MSD=MS Duplicate RPD=Relative%Difference <br /> Project Manager Page 3 of 3 9811 H50 BLA <6> <br />