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j SEQUOIA ANALYTICAL <br /> Drive 680 Chesapeake DaRedwood City, CA <br /> NO (415) 364-9600 FAX(415) 364-9233 <br /> RESNA Client Project ID OW0169 01, BJJ Tracy <br /> } 1710 Main Street Matrix Liquid r <br /> Escalon, CA 95320 <br /> Attention Lois Frantz OC Sample Group 4A34301-2 Reported Jan 24, 1994 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes Diesel <br /> Benzene <br /> Method EPA 8020 EPA SOX EPA 8020 EPA 8020 EPA 8015 <br /> Analyst M Nipp M Nipp M Nipp M Nipp D Tran <br /> MS/MSD <br /> Batch#- 4A38709 4A38709 4A38709 4A38709 4A34201 <br /> Date Prepared: - - 1/12/94 <br /> Date Analyzed. 1/14/94 1/14/94 1/14/94 1/14/94 1/13/94 <br /> Instrument I D # GCHP-3 GCHP-3 GCHP-3 GCHP 3 GCHP-5 <br /> Cone. Spiked: 1opg/L 10Ng/L 10pg/L 30pg/L 600 ug/L <br /> Matrix Spike <br /> % Recovery: 100 100 100 100 47 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 100 100 99 100 46 <br /> Relative% <br /> Difference 00 00 10 00 22 <br /> LCS Batch#. - BLK011294 <br /> Date Prepared - 1/12/94 <br /> Date Analyzed - - 1/13/94 <br /> Instrument I D # - GCHP-5 <br /> LCS % <br /> Recovery - - - - 114 <br /> % Recovery <br /> Control Limits. 71-133 72-128 72-130 71-120 28-122 <br /> Please Note <br />. The LCS is a control sample of known,Interferent free matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL 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 limits due to matrix <br /> l interference,the LCS recovery is to be used to validate the batch <br /> Vickie TagLA <br /> Project Manager 4A34301 wAT <3> <br />