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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 8 t 9 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> IWO <br /> Blaine Tech Service's, Inc Client Project ID Shell Stockton /971222-F1 n N <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thle Work Order# 9712F01-02-08 Reported Jan 12, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> QC Batch#' GC1230971SHSHSB GC1230971SHSHSB GC1230971SHSHSB <br /> Analy. Method: ISHS ISHS ISHS <br /> Prep. Method. HS HS HS <br /> Analyst T Tran T Tran T Tran <br /> MS/MSD # 9712D1505 9712D1505 9712D1505 <br /> Sample Conc ND ND ND <br /> Prepared Date 12/30/97 12/34/97 12/30/97 <br /> Analyzed Date 12/30/97 12/30/97 12/30/97 <br /> Instrument I D.# GCV1 GCV1 GCV1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result: 87 91 s s <br /> MS % Recovery: 109 114 111 <br /> Dup Result: 91 96 97 <br /> MSD % Recov : 114 120 121 <br /> RPD: 45 53 86 <br /> RPD Llmlt:�o-so— 0-50 - -.0-50 <br /> LCS #: BLK010197 BLK010197 BLK010197 <br /> Prepared Date 1/1/98 1/1/98 1/1/98 <br /> Analyzed Date: 1/1/98 1/1/98 1/1/98 <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. 90 91 88 <br /> LCS % Recov - 113 114 110 <br /> LCS <br /> Control Limits 50-150 50-150 50-150 <br /> Please Note <br /> The LCS is a control sample of known,Interferent4ree matrix that is analyzed using the same reagen <br /> SEQUO ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of samp <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 /> Pe y enner <br /> Prole anager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9712F01 BLA <5> <br /> ta <br />