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Sequoia 680 Chesapeake Drive Redwood City CA 94063 {415) 364 9600 FAX 415 364 9233 <br /> q ) <br /> 1900 Bates Avenue Suite L Concord CA 94520 (510) 6$6 9600 FAX (SEO)686 9689 <br /> Analytical 819 Striker Avenue Suite a Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> RESNA wry Client Project ID F7132 94, puck Stop 132 <br /> 42501 Albrae Street Matrix Liquid <br /> Fremont, CA 94536 r I <br /> Attention Rich Garlow QC Sample Group 9412911 -01-8 Reported Jan 5, 1995 <br /> try xI v v ♦r ... ...,..h'}v..-ryq r t vv x .. . t 4 <br /> ,4{ <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: N Zahedi N Zahedl N Zahedi N Zahedi <br /> MS/MSD <br /> Batch#: 4120258 4120258 4120258 4120258 <br /> Date Prepared: 12/20/94 12/20/94 12/20/94 12/20/94 <br /> Date Analyzed: 12/20/94 12/20/94 12/20/94 12/20/94 <br /> Instrument I D*: GCHP1 GCHP1 GCHP1 GCHP1 <br /> Conc. Spiked- 10yg/L 10Pg/L 10Mg/L 30pg/L <br /> Matrix Spike <br /> % Recovery: 87 88 87 90 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 88 89 88 92 <br /> Relative% <br /> Difference: 1 1 1 1 1 1 22 <br /> LCS Batch#: LC5122094 LCS 122094 LCS122094 LCS122094 <br />' Date Prepared: 12/20/94 12/20/94 12/20/94 12/20/94 <br /> Date Analyzed. 12/20/94 12/20/94 12/20/94 12/20/94 <br /> Instrument I D.#: GCHP1 GCHP1 GCHP1 13CHP1 <br /> LCS% <br /> Recovery 97 97 97 101 <br /> % Recovery <br /> Control Limits: 71-133 72-128 72-130 71-120 <br /> I Please Note <br /> SEQUOIA ANALYTICAL The LCS 1s a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> Elap#2000 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 /> Vickie Tague Clark <br /> Project Manager 9412411 RES <11> <br />