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I <br /> Sequoia 680 Chesapeake Drive Redwood Gty CA 94063 (415) 364-9600 FAX(415) 364 9233 <br /> 1900 Bates Avenue Suite L Concord,CA 94520 (510) 686 9600 FAX(510)686 9689 <br /> �,,,�► Analytical 819 Sinker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> . a <br /> i <br /> rtAM-West Client Project lb Portof Stockton, 2308 00 <br />' 1777 Botelho Dr, Ste 260 Matra Liquid <br /> Walnut Creek, CA 94596 <br /> Attention Arun Chemburkar ❑C Sample Group 5020203-13 Reported Feb 16, 1995 <br />' QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes Diesel <br /> Benzene <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015 Mod <br /> Analyst A-Tuzon A Tuzon A.Tuzon A Tuzon K Wimer <br />' MS/MSD <br /> Batch# 5010119 5010119 5010119 5010119 BLK020795 <br />' Date Prepared. 2/6/95 2/6/95 2/6/95 2/6/95 2/7/95 <br /> Date Analyzed- 2/6/95 2/6/95 2/6/95 2/6/95 2/9/95 <br /> Instrument i D #: HP-5 HP-5 HP-5 HP-5 HP-38 <br /> Conc Spiked 20 pg/L 20 ug/L 20 ug/L 60 jig/L 300 jig/L <br /> Matrix Spike <br /> % Recovery 105 110 110 110 105 <br /> iMatrix Spike <br /> Duplicate% <br /> Recovery: 110 110 110 108 89 <br /> Relative% <br /> Difference: 47 00 0 0 18 16 <br /> LCS Batch#- SLCS020695 3LCS020695 3LCS020695 3LCS020695 BLK020795 <br /> Date Prepared: 2/6/95 2/6/95 2/6/95 2/6/95 2/7/95 <br /> Date Analyzed: 2/6/95 2/6/95 2/6/95 2/6/95 2/9/95 <br /> Instrument I.D.#: HP-5 HP-5 HP-5 HP-5 HP-3B <br />' LCS % <br /> Recovery: 94 96 98 98 105 <br />' Recovery <br /> Control Umtts- 71-133 72-128 72-130 71-120 28-122 <br /> Please Note <br /> SEQUOIA AN The LCS is a control sample of known,Interferent free matrix that is analyzed using the same reagents, <br /> 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 M <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to rnatrix <br /> Kenneth K P Lee interference the LCS recovery is to be used to validate the batch <br /> Laboratory Director <br />' 502D203ERM <4> <br /> T <br />