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9 <br /> 1 Sequoia 680 Chesapeake Drive Redwood City,CA 94* (650) 364 9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94 (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 /> • <br /> Blaine Tech Services, Inc Client Project ID Shell'Stockton/971121-G1 <br /> 1680 Rogers Ave Matrix Liquid <br /> -'San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9711E95-01-05 Reported Dec 12, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> QC Batch#' GC1201971SHSHSA GC1201971SHSHSA GC1201971SHSHSA <br /> Analy Method ISHS ISHS ISHS <br /> Prep Method HS HS H5 <br /> Analyst T Tran T Tran T Tran <br /> MS/MSD# 9711C8303 971108303 971108303 <br /> Sample Conc ND ND ND <br /> Prepared Date. 12/1/97 12/1/97 12/1/97 <br /> Analyzed Date- 12/1/97 12/1/97 12/1/97 <br /> Instrument LD #- GCvi GCv1 GCvi <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 79 87 84 <br /> MS % Recovery 99 109 105 <br /> Dup Result 78 85 81 <br /> MSD % Recov 98 106 101 <br /> RPD 13 23 36 <br /> RPD Limit 0-40 0-40 0-40 <br /> LCS #: BLK120197 BLK120197 BLK120197 <br /> Prepared Date: 12/1/97 12/1/97 12/1/97 <br /> Analyzed Date. 12/1/97 12/1/97 12/1/97 <br /> Instrument I D #: GCvi GCv1 GCv1 <br /> Conc Spiked: 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> LCS Result: 80 82 79 <br /> LCS % Recov : 100 103 99 <br /> 50-150 50-150 50-150 <br /> LCS 50-150 50-150 50-150 <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 /> SEQU NALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of Sam <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure <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 /> Pt? gy nner **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative% Difference <br /> Pro c Manager Page 1 of 2 9711E95 BLA <4> <br /> I <br /> ,,Q� I <br />