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1 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 14W Analytical <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Teal Services, Inc Client Project ID Shell 2575 Country Club <br /> n 1680 Rogers Ave Matrix Liquid <br /> 'San.lose, CA 95112 <br /> Attention Fran Thie Work Order# 98041-107 -01-03, 05-06, 08, Reported May 13, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> QC Batch#* GC0428981SHSHSB GC0428981SHSHSB GCO428981SHSHSB <br /> Analy Method iSHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst T Sorokin T Sorokin T Sorokin <br /> MS/MSD # 9804E3110 9804E3110 9804E3110 <br /> Sample Conc : N D N D N D <br /> Prepared Date 4/28/98 4/28/98 4/28/98 <br /> Analyzed Date 4/28/98 4/28/98 4/28/98 <br /> Instrument I D # GCV1 GCV1 GCV1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result. 75 90 92 <br /> MS % Recovery 94 113 115 <br /> DTII] Result 69 80 79 <br /> MSD % Recov : 86 100 99 <br /> RPD 83 12 15 <br /> RPD Limit 0-50 0-50 0-50 <br /> LCS # BLK042898 BLK042898 BLK042898 <br /> Prepared Date 4/28/98 4/28/98 4/28/98 <br /> Analyzed Date 4/28/98 4/28/98 4/28/98 <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 69 80 81 <br /> LCS % Recov - 86 100 101 <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 /> !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 /> P g y r <br /> Pr lect ger * MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 98041-107 BLA <1> <br />