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- \ Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 1900 Satcs 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 /> } 4 }♦ . ,5,4 }hw <br /> t RESNA Client Project ID P7132 94, Quik Stop 132 <br /> ;-'42501 Albrae Street Matrix Liquid <br /> fi$Fremont, CA 94538 <br /> Attention Rich Garlow QC Sample Group 9409A04-05-6 MReported Sep 27, 1994 <br /> �.;,,.c ,w+'•F ro.$^e}r.Y,}a S`���'fa'Lc'V'-.w.vo Y r G v+<„e o Y : ,,,,<,.N t x.. <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#: 940983402 940983402 940983402 940983402 <br /> Date Prepared: - - - - <br /> Date Analyzed. 9/20/94 9/20/94 9/20/94 9/20/94 <br /> Instrument 1 D #: GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Conc. Spiked. 10ug/L 10ug/L 10ug/L 30ug/L <br /> Matrix Spike <br /> pw % Recovery. 110 110 110 110 <br /> Matrix Spike <br /> Duplicate <br /> Recovery 110 1 i0 110 113 <br /> Relative % <br />' Difference* oo t °o 00 27 <br /> LCS Batch#: - - - <br /> Date Prepared <br /> Date Analyzed* <br /> Instrument I 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 /> 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 8 <br /> VWU” <br /> +� the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> V"-"" Interference,the LCS recovery is to be used to validate the batch <br /> Vickie Tague Clark 9409A04 RES <2> <br /> Project Manager <br /> 1 <br />