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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> r (916) 921-9600 • FAX (916) 921-0100 <br /> 3164 p pr, Suite 200 M1 ale Project ilea V atrbL W 009 01/Teichert <br /> ater <br /> Rancho Cordova,CA 95670 <br /> Attention Claudio Avda CC Sample Group 4010468-471 Reported Jan 26, 1994 <br /> QUALITY CONTROL DATA REPORT <br /> AN VRT Ethy4- <br /> Benzene Toluene Benzene Xvlenes <br /> • <br /> Method: EPA 602 EPA 602 EPA 602 EPA 602 <br /> Analyst: Chiaravalioh Chiaravadob Chiaravallob Chiaravailob <br /> Concentration <br /> Spiked: 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> • LCS Batch#: LCS012494 LCS012494 LCS012494 LCS012494 <br /> Date Prepared: 1/24/G4 1/24/94 1/24/94 1/24/94 <br /> Date Analyzed: 1/24/94 1/24/94 /24/94 1/24/94 <br /> Instrument I.D.#: HP-2 HP 2 HP-2 HP-2 <br /> LCS °/n <br /> Recovery: 104 103 103 102 <br /> Control Limits: 80-120 80-120 80.120 80-120 <br /> MS/MSD <br /> Batch#: 4010709 »010709 4010709 4010709 <br /> Date Prepared: 1/24/94 1/24/94 1/24194 1/24194 <br /> Date Analyzed: 1/24/94 1/24/94 1/24/94 1/24/94 <br /> Instrument I.D.#' HP-2 r-P 2 HP-2 HP 2 <br /> • <br /> Matrix Spike <br /> OS Recovery, 110 0 110 110 <br /> Matmc Spike <br /> Duplicate% <br /> Recovery" 110 10 110 10 <br /> Relative% <br /> Difference: 00 00 co 00 <br /> SEIDUCOIA ANALYTICAL Please Note <br /> The LCS is a control sample of known interteniint tree matrix that is anarvzed using the same reagems <br /> preparation and analytical methods employed for the samples The LCS%recoverydata is used tar <br /> validation of-sample battle results. Due to rnaum effects the CC Nmrts for MS/MSD's are aaVisory oniv <br /> Linda C.Schneider and aro not used to aecsot or refect batch results <br /> Project Manager <br /> 4010468 RES <2> <br />