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W ,i a1 <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 1900 Bates Avenue,Suite L Concord,CA 94520 (510) 686 9600 FAX(510)686-9689 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> ... r r S t r r 4 • . w r v ntir � r rxrkr r ' , 6 r 4 Sk/�.£ASS♦ v}4 C V <br /> RESNA Client Project ID 150070 01, Chase Chevrolet y£ <br /> 1710 Main Street Matrix Liquid <br /> Escalon, CA 95320 <br /> -Attention Greg Stahl QC Sample Group 4E57401-2 Reported MayN23, 1994 <br /> ..r r ♦ O r • ' v � rx. xr r ' t r 4} ? nv. n v x• r r ri x r xa v'"it ov})A�ASw r..i 3 <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 J Minkel J Minkel J Minkel J Minkel <br /> MS/MSD <br /> Batch#. 4E36707 4E36707 4E36707 4E36707 <br /> Date Prepared: - - - <br /> Date Analyzed: 5/12/94 5/12/94 5/12/94 5/12/94 <br /> Instrument l.D.#. GCHP-3 GCHP-3 GCHP-3 GCHP-3 <br /> Conc Spiked. 10pg/L 10pg/L 10pg/L 30pg/L <br /> Matrix Spike <br /> %Recovery, 100 100 100 103 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 100 110 100 107 <br /> Relative% <br /> Difference 0 0 9 5 00 38 <br /> v ` r v raiG.x r rix }x ... 4. r r .r'{ .. N r r v. x .. ,. x{ LvA � ..k}�i.+Y.'e.�..��YA�L•�rSEiJ <br /> I <br /> LCS Batch#• - - - - <br /> Date Prepared. - - - <br /> Date Analyzed - - - <br /> instrument l D# - - <br /> LCS% <br /> Recovery. - - - <br /> %Recovery <br /> Control Limits 71-133 72-128 72-130 71-120 <br /> Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> EQUCIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> toRified with known quant,les of specific compounds and subjected to the entire anaiytical procedure If <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> U v Y i interference,the LCS recovery is to be used to validate the batch <br /> Vickie Tague Clark <br /> Project Manager 4E57401 WAT <2> <br /> f, <br />