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/" 1 Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988-9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> Enviros Client Project ID $hell 4315 Waterloo, Stockton <br /> 270 Perkins Ave Matrix Solid <br /> } Sonoma, CA 95476 <br /> Attention Joe Neely Work Order# 9602G44 -01, -02 Reported Mar 1, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch#. G0022796BTDCDC13 GCO22796BTEXEXB GCO22796BTEXEXB GCO22796BTEXEXB <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst. E Cunanan E Cunanan E Cunanan E Cunanan <br /> MS/MSD#' 9602C89-07 9602C89-07 9602089-07 9802C89-07 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 2/27/96 2/27/96 2/27/96 2/27/96 <br /> Analyzed Date 2/27/96 2/27/96 2/27/96 2/27/96 <br /> Instrument I D.#- GCHP1 GCHP1 GCHP1 GCHP1 <br /> Conic. Spiked 0 20 mg/kg 0 20 mg/kg 0 20 mg/kg 0 60 mg/kg <br /> Result' 017 018 018 055 <br /> MS %Recovery- 85 90 90 92 <br /> 10 Dup Result 017 017 018 053 <br /> MSD % Recov 85 85 90 88 <br /> RPD 00 57 00 37 <br /> RPD Limit 0-50 0-50 0-50 0-50 <br /> LCS# G8LK022796BS-A GBLK022796BS-A BLK022796BS-A GBLK022796BS-A <br /> Prepared Date 2/27/96 2/27/96 2/27/96 2/27/96 <br /> Analyzed Date- 2/27/96 2/27/96 2/27/96 2/27/96 <br /> Instrument I D # GCHP1 GCHP1 GCHP1 GCHP1 <br /> Conc Spiked 0 20 mg/kg 0 20 mg/kg 0 20 mg/kg 0 60 mg/kg <br /> LCS Result 020 020 020 060 <br /> LCS %Recov: 100 100 100 100 <br /> LCS <br /> Control Limits 50-150 50-150 50-150 50-150 <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 /> interference,the LCS recovery is to be used to validate the batch <br /> Ike Gregory <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9602G44 EEE <1> <br />