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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek, CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> �l 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/970206-1-111 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order # 9702584 -01, -06, -09 Reported Feb 21, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch# GCO21897BTEX02A GCO21897BTEX02A GCO21897BTEX02A GCO21897BTEX02A <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.Miraftab X Miraftab A Miraftab A. Miraftab <br /> MS/MSD # 970249011 970249011 970249011 970249011 <br /> Sample Cone N D N D N D N D <br /> Prepared Date 2/18/97 2/18/97 2/18/97 2/18/97 <br /> Analyzed Date 2/18/97 2/18/97 2/18/97 2/18/97 <br /> Instrument I D # GCHP02 GCHP02 GCHP02 GCHP02 <br /> Cone Spiked 10ug/L 10ug/L 10ug/L 30ug/L <br /> Result 10 98 98 31 <br /> WS % Recovery 100 98 98 103 <br /> Dup Result 10 99 99 31 <br /> MSD % Recov 100 99 99 103 <br /> RPD 00 10 10 00 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS # BLK021897 BLK021897 BLK021897 BLK021897 <br /> Prepared Date 2/18/97 2/18/97 2/18/97 2/18/97 <br /> Analyzed Date 2/18/97 2/18/97 2/18/97 2/18/97 <br /> Instrument I D # GCHP02 GCHP02 GCHP02 GCHP02 <br /> Cone Spiked: 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Result 10 10 10 32 <br /> LCS % Recov 100 100 100 107 <br /> 80-140 50-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 <br /> Control imus <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> JJ <br /> UOI 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 y Penner <br /> Manager *"MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9702584 BLA <1> <br />