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Sequoia 6$0 Chesapeake Drive Redwood Gk- CA 94 (650)364-9600 FAX(650) 364-9233 <br /> 404 N Wlget Lane Walnut Creek.CA 9459$98 (510)988-9600 FAX(410)988= 673 <br /> 4D— 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical <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 + Shell 2575 Country Club <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thle Work Order# 98041-107-01-09, 98041-108-10-18 Reported May 13, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#' GC043098802009A GC043098802009A G0043098802009A GCO43098802009A GC043098802009A <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 # 8041950 8041950 8041950 8041950 8041950 <br /> Sample Conc : N D N D N D N D N D <br /> Prepared Date: 4/30/98 4/30/98 4/30/98 4/30/98 4/30/98 <br /> Analyzed Date: 4/30/98 4/30/98 4/30/98 4/30/98 4/30/98 <br /> Instrument I D #' HP9 HP9 HP9 HP9 HP9 <br /> Conc Spiked 20 ug/L 20 ug/L 20 pg/L 60 Ng/L 350 Ng/L <br /> Result 18 19 18 55 280 <br /> MS % Recovery 90 95 90 92 80 <br /> Dup Result 20 22 21 63 320 <br /> MSD % Recov 100 110 105 105 91 <br /> RPD 105 146 154 136 133 <br /> RPD Limit 0-20 0-20 0-20 0-20 0-50 <br /> LCS #- LCSO43098 LCSO43098 LCSO43098 LCSO43098 LCSO43098 <br /> Prepared Date: 4/30/98 4/30/98 4/30/98 4/30/98 4/30/98 <br /> Analyzed Date: 4/30/98 4/30/98 4/30/98 4/30/98 4/30/98 <br /> Instrument I D.#- HP9 HP9 HP9 HP9 HP9 <br /> Conc Spiked. 20pg/L 20pg/L 20jig/L 60Ng/L 35apg/L <br /> LCS Result- 19 20 19 57 280 <br /> LCS % Recov 95 100 95 95 80 <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 Nota <br /> IraALYTICAL The LCS is a control sample of known,Interferent-free matrix that is analyzed using the same reagents, <br /> preparation,and analytical methods employed for the samples The matrix spike Is art aliquot of samplefortified with known quantities of specific compounds and subjected to the entire analytical procedurethe recovery of analytes from the matrix spike does not fall within specified control limits due to matrixinterference,the LCSrcoveryistobe used to validate the batch <br /> ginneranaer ** <br /> MS= <br /> Spike, MSD=MS Duplicate, RPD�Relative�o Difference 9804H07 BLA <4n <br />