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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX(415)364 9233 <br /> FVC 1900 Bates Avenue,Sutte L Concord CA 94520 (510) 686 9600 FAX(510)686 9689 <br /> Analytical 819 Striker Avenue Sac 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> 4 v � ,ry - ' <br /> MAPM Services Tient Project jb IJnocaf #2859, 1665 pacific Ave, Stockton <br /> 2401 Stanwell Dr, Ste 400 Matrix Liquid <br /> Concord, CA 94520 <br /> Attention Avo Avedessian QC Sample Group 4080913-919 B Reported Aug 30, 1994 <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 A Tuzon A Tuzon A.Tuzon A.Tuzon <br /> MS/MSD <br /> Batch#. 4080919 4080919 4080919 4080919 <br /> Date Prepared 8/23/94 8/23/94 8/23/94 8/23/94 <br /> Date Analyzed 8/23/94 8/23/94 8/23/94 8/23/94 <br /> Instrument I D # HP-5 HP-5 HP-5 HP 5 <br /> Cone Spiked 20 ug/L 20 pg/L 20 pg/L 60 pg/L <br /> Matrix Spike <br /> % Recovery loo 105 120 118 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 105 115 120 120 <br /> S <br /> Relative% <br /> Difference 49 91 00 1 7 <br /> LCS Batch# 3LCS082394 3LCSD82394 3LCS082394 3LC8082394 <br /> Date Prepared 8/23/94 8/23/94 8/23/94 8/23/94 <br /> Date Analyzed 8/23/94 8/23/94 8/23/94 8/23/94 <br /> Instrument I D #. HP-5 HP-5 HP-5 HP 5 <br /> LCS % <br /> Recovery 102 112 116 114 <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 /> �EQUOIA 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 /> Signature on File 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 /> Alan B Kemp <br /> Project Manager <br /> 4080913 MPD <3> <br />