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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> Y404 N Wiget Lane Walnut Creek CA 9459$ (510) 988 9600 FAX (510) 988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton/976225-K2 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order # 9702F18 06 Reported Mar 18, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch# GC031097BTEX01A GC031097BTEX01A GCO31097BTEXOIA GC031097BTF-XOIA <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# GW9702F3511 GW9702F3511 GW9702F3511 GW9702F3511 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 3/10/97 3/10/97 3/10/97 3/10/97 <br /> Analyzed Date 3/10/97 3/10/97 3/10/97 3/10/97 <br /> Instrument 1.13 # GCHP-01 GCHP-01 GCHP-01 GCHP-01 <br /> Conc Spiked 10 ug/L 10 ug/L 10 ug/L 30pg/L <br /> Result 10 10 10 30 <br />*IVIS % Recovery 100 100 100 100 <br /> Dup Result 8 8 87 88 25 <br /> MSD % Recov 88 87 86 83 <br /> RPD 130 140 130 18 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS # BLK031097 BLK031097 BLK031097 BLK031097 <br /> Prepared Date 3/10/97 3/10/97 3/10/97 3/10/97 <br /> Analyzed Date 3/10/97 3/10/97 3/10/97 3/10/97 <br /> Instrument I D # GCHP-01 GCHP-01 GCHP-01 GCHP-01 <br /> Conc Spiked 10ug/L 10ug/L 10ug/L 301ig/L <br /> LCS Result 93 91 94 27 <br /> LCS % Recov 93 91 94 90 <br /> 60-140 60-140 60-140 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 anaiyttcal 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 /> P gg nner <br /> Pr }ect anager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative% Difference 9702F18 BLA <2> <br />