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Sequoia 680 Chesapeake Drive Redwood Cit„ CA 94063 (650) 364-9600 FAX(650) 364-9633 <br /> 404 N Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> as <br /> Analytical 1455 <br /> Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-olo0 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services, Inc Client Project ID Shell 2575 Country Club Blvd <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9807H87-02-03, 05, Reported Aug 20, 1998 <br /> 98071-188-13-14, 16 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> QC Batch#- MS080698MTBEH6A <br /> Analy Method EPA 8260 <br /> Prep Method N A <br /> Analyst M Williams <br /> MS/MSD # 9807DO901 <br /> Sample Conc. N D <br /> Prepared Date 8/6/98 <br /> Analyzed Date 8/6/98 <br /> Instrument 1.D # H6 <br /> Conc Spiked 50 ug/L <br /> Result 59 <br /> MS %Recovery 118 <br /> Dup Result 63 <br /> MSD % Recov. 126 <br /> RPD 66 <br /> RPD Limit 0-25 <br /> ==�"i"iv..�'.v�t+h%o bkd.Nsx h'+]i'��h t$i[wa�✓�?✓✓�.w�r��ryr wv .n ,v v L w,v.v4^'i�vn"nv r .,...,,.-,v,.,....�..www n>»nwn wa✓. rm Hutu+.xvwvtia oxciacOcivh»'.4 ✓w s ., r✓v.w r✓.0 gym.✓ r w ::. n— <br /> LCS # LCS080598 <br /> Prepared Date 8/5/98 <br /> Analyzed Date 8/5/98 <br /> Instrument I.D # H6 <br /> Conc. Spiked 50ug/L <br /> LCS Result 55 <br /> LCS % Recov 110 <br /> 60-140 <br /> LCS 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 /> $E, AN I_YTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> [J fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> the recovery of analytes from the matrix splice does not fall within specified control limits due to matrix <br /> i erence,the LCS recovery is to be used to validate the batch <br /> P gy P ner <br /> Pr ect anager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Diff erence 9807H87 BLA <4> <br />