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680 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N.Wlget Lane Walnut Creek CA 94549 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento.CA 95834 (916)921- FAX(916)921-0100 <br /> - 9600 <br /> �till� Analytical 1455 McDowell Blvd.North,Ste.D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> :...:::...::.:........... <br /> ................. <br /> ....,... <br /> {. ?�i: :':.: <br /> Y.:.:f. r <br /> . ......... <br /> IU ' C11ent f� o ect Ib: ry7osco #11195, Lathrop <br /> ._;r-'A -Dublin i <br /> 747 Sierra Court, Suite J Matrix: Liquid <br /> jiblin, CA 94568 Reported:orted Feb 3, 19 <br /> OC Sample Group: 902-0150Liention: Doug Lee .. 99`; <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> Method- EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: C.Westwater C.Westwater C.Westwater C.Westwater <br /> MS/MSD <br /> Batch#: 9011602 9011602 9011602 9011602 <br /> Date Prepared: 2/2/99 2/2/99 2/2/99 2/2/99 <br /> Date Analyzed: 2/2/99 2/2/99 2/2/99 2/2/99 <br /> Instrument I.D.#: HP-2 HP-2 HP-2 HP-2 <br /> Conc. Spiked: 20Ng/L 20pg/L 20pg/L 60yg/L <br /> Matrix Spike <br /> % Recovery: 85 B5 85 92 <br /> Matrix Spike <br /> Duplicate <br /> Recovery: 100 100 1co 11a <br /> Relative% <br /> Diff 16 16 16 16 <br /> ff <br /> LCS Batch#: 2LCS020299 2LCS020299 2LCS020299 2LCS020299 <br /> Date Prepared: 2/2/99 2/2/99 2/2/99 2/2/99 <br /> Date Analyzed: 212/99 2/2/99 2/2/99 2/2/99 <br /> Instrument I.D.#: HP-2 HP-2 HP-2 HP-2 <br /> LCS % <br /> Recovery: 95 90 95 105 <br /> Recovery <br /> Control Limits: 70-130 70-130 70.130 70-130 <br /> Please Note; <br /> The LCS Is a control sample of known,interferent free matrix that is analyzed using the same reagents. <br /> "=AUOIA ANALYTICAL, #1271 preparation,and analytical methods employed for the samples. The matrix spike is an aliquot of sample <br /> 1 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 /> ullanne Fegley <br /> Project Manager 9020150.GET <2> <br />