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680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9Z33 <br /> 1a) <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)79Z-0342 <br /> Blaine Tech Services, Inc Client Project ID Shell 6131 Pacific Ave <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 98051`44-01-02, 05, 07-10 Reported Jun 11, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch# GC060398802005A GC060398802005A GC060398802005A GC060398802005A GCO60398802005A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA S015M <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst D Newcomb D Newcomb D Newcomb D Newcomb D Newcomb <br /> MS/MSD # 8051819 8051819 8051819 8051819 8051819 <br /> Sample Conc N D 13 N D ND N D <br /> Prepared Date 6/3/98 6/3/98 6/3/98 6/3/98 6/3/98 <br /> Analyzed Date 6/3/98 6/3/98 6/3/98 6/3/98 6/3/98 <br /> Instrument I D # HP5 HP5 HP5 HP5 HP5 <br /> Conc. Spiked 20pg/L 20Mg/L 20yg/L 60Ng/L 310Ng/L <br /> Result. 20 21 20 62 340 <br /> MS % Recovery* 100 99 100 103 110 <br /> Dup. Result: 21 22 20 64 330 <br /> MSD % Recov .. 105 103 100 107 106 <br /> RPD- 49 47 00 32 30 <br /> RPD Limit 0-25 0-20 0-20 0-20 0-50 <br /> LCS # LCS060398 LCS060398 LCS060398 LCS060398 LC6060398 <br /> Prepared Date 6/3/98 6/3/98 6/3/98 6/3/98 6/3/98 <br /> Analyzed Date 6/3/98 6/3/98 6/3/98 6/3/98 6/3/98 <br /> Instrument I D # HP5 HP5 HP5 HP5 HP5 <br /> Conc Spiked 20 pg/L 20 pg/L 20 pg/L 60 pg/L 310 pg/L <br /> LCS Result 21 22 22 68 290 <br /> LCS % Recov 105 110 110 113 94 <br /> 60-140 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note <br /> jSEQUOI AN LYTICAL The LCS is a control sample of known,interferent-free matrix that 1s analyzed using the same reagents, <br /> Ia 71 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 gg nner <br /> Pr t anager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative% Difference 9805F44 BLA <4> <br />