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IDSequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (5 0) 988 9600 FAX(510)988 9673 <br /> %07 Analytical 819 Stake,Avenue Suite 8 Sacramento,CA 95834 (916) 921 96001 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-5075/951031-M1 v <br /> 985 Timothy Drnre Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9511057 -01-03 Reported Nov 13, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC110295BTEX21A GC110295BTEX21A GC11029513TEX21A GC110295BTEX21A <br /> Analy Method. EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method' EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: J Woo J woo J Woo J woo <br /> MS/MSD#: 9511G1111 9511G1111 951161111 9511G1111 <br /> Sample Conc • N D N D N D N D <br /> Prepared Date- 11/2/95 11/2/95 11/2/95 11/2/95 <br /> Analyzed Date 11/2/95 11/2/95 11/2/95 11/2/95 <br /> Instrument I D # GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked 10 pg/L 10 Ng/L 10 pg/L 30 ug/L <br /> Result. 9 9 10 11 32 <br /> MS % Recovery 99 100 110 107 <br /> Dup Result 9 9 10 11 32 <br /> MSD % Recov 99 100 110 107 <br /> RPD 00 00 00 00 <br /> RPD Limit 0-50 0-50 0-50 0-50 <br /> LCS # BLK102695 BLK102695 BLK102695 BLK102695 <br /> Prepared Date 11/2/95 11/2/95 11/2/95 11/2/95 <br /> Analyzed Date 11/2/95 11/2/95 11/2/95 11/2/95 <br /> Instrument 1 D # GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked 10ug/L 10pg/L 10pg/L 30pg/L <br /> LCS Result 10 11 11 33 <br /> LCS %Recov 100 110 110 110 <br /> ms/MSG--- <br /> LCS <br /> M DLCS 71-133 72-128 72130 71-120 <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 /> SEQUOIA 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 /> fJ�{�Af 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 /> Peggy rnner <br /> Project Manager "'"MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9511057 SLA <1> <br />