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IN 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 /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> v,,,� Analytical <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707) 792-1865 FAX(707)792-0342 <br /> 06lain e Tech Services, lnc V Client Project ID Shell 620 W Charter Way <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9805F39 -01-10 Reported Jun 11, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch# G0060498802002-A GCO80498802002A GCO60498802002A GC060498802002-A GC060498802002A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst K Nill K Nill K Nill K NIII K Nill <br /> MS/MSD # 8052288 8052288 8052288 8052288 8052288 <br /> Sample Conc N D 075 N D 0 60 N D <br /> Prepared Date 6/4/98 6/4/98 6/4/98 6/4/98 6/4/98 <br /> Analyzed Date 6/4/98 6/4/98 6/4/98 6/4/98 6/4/98 <br /> Instrument I D # HP2 HP2 HP2 HP2 HP2 <br /> Conc. Spiked 20ug/L 20ug/L 20ug/L 60ug/L 380 ug/L <br /> Result 22 22 23 67 370 <br /> MS % Recovery 110 106 115 111 97 <br /> Dup Result 17 17 16 52 420 <br /> MSD % Recov.. 85 82 80 87 111 <br /> RPD 256 256 359 252 127 <br /> RPD Limit 0-20 0-20 0-20 0-20 0-50 <br /> LCS # LCS060498 LC8060498 LCS060498 LCS060498 LCS060498 <br /> Prepared Date 6/4/98 6/4/98 6/4/98 6/4/98 6/4/98 <br /> Analyzed Date 6/4/98 6/4/98 6/4/98 6/4/98 6/4/98 <br /> Instrument I D # HP2 HP2 HP2 HP2 HP2 <br /> Conc Spiked 20ug/L 20ug/L 20ug/L 60ug/L 380 ug/L <br /> LCS Result 18 18 18 56 310 <br /> LCS % Recov 90 90 90 93 82 <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 /> SE U IA NALYTICAL The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> E 127 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 limas due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> egy Penner <br /> ject Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9805F39 BLA <1> <br />