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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(5tO)988-9673 <br /> Analytical 819 Striker Avenue Suite 6 Sacramento CA 95834 (916)921-9600 FAX(9t6)921-0100 <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 Chevron 9-4275/980326-G1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9803157-03 Reported Apr 21, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> OC Batch# GCO401981SHSHSB GC0401981SHSHSB GCO40198IGHSHSB <br /> Analy Method ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst T Sorokin T Sorokin T Sorokin <br /> MS/MSD# 9803J5701 9803,15701 9803J5701 <br /> Sample Conc . ND ND No <br /> Prepared Date: 4/1/98 4/1/98 4/1/98 <br /> Analyzed Date: 4/1/98 4/1/98 4/1/98 <br /> Instrument I D #- GCv1 GCv1 GCv1 <br /> Conc Spiked: 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 8 3 91 87 <br /> MS % Recovery. 104 114 109 <br /> • Dup Result 8 9 95 88 <br /> MSD % Recov 111 119 110 <br /> RPD 70 43 11 <br /> RPD Limit 0-40 0-40 0-40 <br /> LCS# BLK040398 BLK040398 BLK040398 <br /> Prepared Date 4/3/98 4/3/98 4/3/98 <br /> Analyzed Date 4/3/98 4/3/98 4/3/98 <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- 79 93 91 <br /> LCS % Recov 99 116 114 <br /> 50-150 50-150 50-150 <br /> LCS 70-130 70-130 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 /> NAL ICAL 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 /> e y Penner <br /> sect Manager '°*MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9803157 BLA <5> <br />