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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364.9600 FAX(415) 364-9233 <br /> 404 N,Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(5io)988-9673 <br /> Analytical <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921,0100 <br /> ................... <br /> PDS <br /> .......... ....... <br /> ervices Client"Frojectli ......Unibc 6146015, 6 0 1-� <br /> e eman Lane, Lodi <br /> 2401 Stanwell Dr., Ste. 300 Matrix: Liquid <br /> Concord, CA 94520. <br /> Attention: Sarkis Karkarian QC Sample Group: 5091208-19 Reported: Oct 5, 1995:" <br /> ........................... <br /> ... .......... ....... ......... <br /> ................... ..... <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: K.Nill K Nill K.Nill K.Nill <br /> IVIS/MSD <br /> Batch#: 5091208 5091208 5091208 5091208 <br /> Date Prepared: 10/2/95 10/2/95 10/2/95 10/2/95 <br /> Date Analyzed: 10/2/95 10/2/95 10/2/95 10/2/95 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 <br /> Conc. Spiked: 20yg/L 20 Mg/L 20,ug/L 60jug/L <br /> Matrix Spike <br /> %Recovery: 90 95 95 97 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 90 95 95 97 <br /> Relative% <br /> Difference: 0.0 0-0 0.0 0.0 <br /> ................... .......... <br /> ......... ........ ......... <br /> .................. ....... .....-.-.......:.,r.;.:,.,......................... <br /> R <br /> :X. .......... <br /> .............................................................................. ...... ........ <br /> LCS Batch#: 2LCS100295 2LCS100295 2LCS100295 2LCS100295 <br /> Date Prepared: 10/2/95 10/2/95 10/2/95 10/2/95 <br /> Date Analyzed: 10/2/95 10/2/95 10/2/95 10/2/95 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 <br /> LCS % <br /> Recovery: 92 96 98 97 <br /> % ecovery <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, #1271 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 /> �ignature on File the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> I interference,the LCS recovery is to be used to validate the batch. <br /> Alan B. Kemp <br /> Project Manager <br /> 5091208.MPD <8> <br />