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4D404680 Chcsapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)964-9233. <br /> Sequoia <br /> N Wiget Lane Walnut Creek CA 94598 (510) 988 %00 FAX(510)988%73 <br /> 4D <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95634 (916) 921 9600 FAX(916)921 0100 <br /> low <br /> Blaine Tech Services, Inc Client Project lD Shell Stockton j 971121-G2 <br /> 1680 Rogers Ave Matrix Liquid <br /> San.lose, CA 95112 <br /> Attention Fran 511 Work Order# 9711 E94-01-02, 04, 06-07 Reported Dec 12, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> QC Batch# GC1201971SF1SHSA GC1201971SHSHSA GC1201971SHSHSA <br /> Anally. Method ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst T Tran T Tran T Tran <br /> MS/MSD # 9711CB303 9711C8303 9711C8303 <br /> Sample Conc N D N D N D <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 # GCV1 GCV1 GCV1 <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 0-50 0-50 0-50 <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.# GCV1 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 /> IggyThe LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents <br /> A ALYTICAL 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 /> nner <br /> anager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative q Difference 9711E94 BLA <5> <br />