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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650) 364-9233 <br /> 404 N.Wig,t Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 104 — Big Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 11W Analytical 1455 McDowell Blvd.North,Ste.D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos, CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> . ... ............................ <br /> .....................:L.::.�:'".:L:"::::"L '"'' '"" <br /> ........... ...... <br /> '�B.I ai n.e Tech Services, Inc. Client Project ID: Shell, 2575 Country Club Blvd. <br /> ::.:1680 Rogers Ave. Matrix: Liquid <br /> San Jose, CA 95112 <br /> �.�Attention: Fran Thie Work Order#: 9901 E86-01-03, 05-06; 9901 E87-01-0 Reported. Feb 19, 19997..:. <br /> ............... ........... <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes BTEX as TPM <br /> Benzene <br /> QC Batch#: GCO20999802005A GCO20999802005A GCO20999802005A GCO20999802005A GCO20999802005A <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: C.Westwater C.Westwater C.Westwater C.Westwater C.Westwater <br /> MS/MSD #: 9020331 9020331 9020331 9020331 9020331 <br /> Sample Conc.: N.D. N.D. N.D. N.D. N.D. <br /> Prepared Date: 2/9/99 2/9/99 2/9/99 2/9/99 2/9/99 <br /> Analyzed Date: 2/9/99 2/9/99 2/9/99 2/9/99 2/9/99 <br /> Instrument I.D.#: HP5 HP5 HIPS HP5 HP5 <br /> Conc. Spiked: 20 pg/L 20 pg/i. 20 pg/L 60 p91L 270yg/L <br /> Result: 18 19 19 59 280 <br /> MS % Recovery: 90 .95 95 98 104 <br /> Dup. Result: 18 19 19 57 250 <br /> MSD % Recov.: 90 95 95 95 93 <br /> RPD: 0.0 0.0 0.0 3.4 11.3 <br /> RPD Limit: 0-20 0-20 0-20 0-20 0-50 <br /> ............ <br /> ........................... ...... . ................... <br /> ...................... <br /> ............ ... ... <br /> ................ .......... ...... ................. <br /> .................................................................................. .... ....... ................ . ..... <br /> LCS #: LCS020999 LCS020999 LCS020999 LCS020999 LCSG20999 <br /> Prepared Date: 2/9/99 2/9/99 2/9/99 2/9/99 2/9/99 <br /> Analyzed Date: 2/9/99 2/9/99 2/9/99 2/9/99 2/9/99 <br /> Instrument I.D.#: HP5 HP5 HP5 HP5 HP5 <br /> Conc. Spiked: 20,ug/L 20pg/L 20pg/L 6opg/L 270yg/L <br /> LCS Result: 18 19 19 60 270 <br /> LCS % Recov.: 90 95 95 100 100 <br /> MS/MSD 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 50-150 <br /> Control Limits <br /> Please Note: <br /> SEQUOIA ANALYTICAL The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> Elap#1271 preparation,and analytical methods employed tor the samples. The matrix spike is an aliquot of samplie <br /> fortified with known quantities of specific compounds and subjected to the entire <br /> re analytical procedure, 11 <br /> the recoveryof analytes from the matrix spike does not fall within specified control limits due to matrix <br /> linterference,the LCS recovery is to be used to validate the batch. <br /> K an Kim <br /> rojeCt Manager MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative% Difference 9901E86.BLA <2> <br /> P-� <br />