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Set �1a 660 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> q4� 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510) 988 9673 <br /> 1q) 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 / 971202-L1 <br /> 1680 Rogers Ave Matrix Liquid <br /> :San Jose, CA 95112 <br /> Attention Fran Thle Work Order# 9712358-08-11 Reported Dec 31, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: MTBE <br /> CC Batch#: MS120997MTBEH6A <br /> Analy Method: EPA 8260 <br /> Prep Method: NA <br /> Analyst M Williams <br /> MS/MSD #: 971238902 <br /> Sample Conc : N D <br /> Prepared Date. 12/9/97 <br /> Analyzed Date 12/9/97 <br /> Instrument I D #. H5 <br /> Conc. Spiked: 50lig/L <br /> Result 54 <br /> MS % Recovery 108 <br />. Dup Result: 52 <br /> MSD %Recov : 104 <br /> RPD 38 <br /> RPD Limit 0-25 <br /> LCS # LCS120997 <br /> Prepared Date 12/9/97 <br /> Analyzed Date. 12/9/97 <br /> Instrument 1.D #- F3 <br /> Conc Spiked: 50 frg/L <br /> LCS Result 36 <br /> LCS % Recov. 72 <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 />�0glen <br /> 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 <br /> neanager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9712358 BLA <7> <br />