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Sequoia 680 Chesapeake Dnve Pedwood Cary,CA 94063 (415) 364-9600 FAX(415)364-9233 <br /> 4 <br /> 4D— <br /> Analytical 404 N Wiget Lane Walnut Geek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> 819 Stnker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> gr0 West;Incnv r v. Ifeilt iro ext ICS. <br /> j toxon#7-0137,Stockton, CA" <br /> 3s 1050 Melody Lane, Ste 160 Matrix Water k' <br /> Roseville, CA 95678 <br /> Attention Mark Naugle QC Sample Group 5100890-896 Reported Nov 2, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst' C Chapman C Chapman C Chapman C Chapman <br /> Concentration <br /> Spiked: 10Ng/L 10ug/L 10pg/L 30Y9/L <br /> LCS Batch#: LCS103095 LCS103095 LCS103095 LCSlOM95 <br /> Date Prepared: 10/30/95 10/30/95 10/30/95 10/30/95 <br /> Date Analyzed: 10/30/95 10/30/95 10/30/95 10/30/95 <br /> Instrument I D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> • <br /> LCS % <br /> Recovery. 95 94 95 94 <br /> Control Umlts 75-125 75-125 75-125 75.125 <br /> xiG v *+ ry V l r v. 4{r! v v nf} fa�4+�}\s, { + xnrr.Y A},r +i1 iw t 4 v }t r r !ff♦ + r r <br /> MS/MSD <br /> Batch# 5101185 5101185 5101185 5101185 <br /> Date Prepared: 10/30/95 10/30/95 10/30/95 10/30/95 <br /> Date Analyzed: 10/30/95 10/30/95 10/30/95 10/30/95 <br /> Instrument LD #: GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Matrix Spike <br /> %Recovery- 87 85 89 88 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 84 85 88 86 <br /> Relative% <br /> Difference. 35 00 11 2.3 <br /> SEQUOIA ANALYTICAL Please Note <br /> The LCS is a control sample of known,interferent free matrix that Is analyzed using the same reagents, <br /> /!G�Schnelder <br /> preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> validation of sample batch results Due to matrix effects,the QC limits for MS/MSD's are advisory only <br /> Linda and are not used to accept or reject batch results <br /> Project Manager <br /> 5100890 FUG: <5> <br /> -y�Tc <br />