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, <br /> SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94083 <br /> (415) 364-9600 FAX (415) 364.9233 <br /> .Engineering Science, Inc K Y Client Project"IDV 4868 w} <br /> 600 Bancroft Way Matrix Water R <br /> <Berkeley, CA 94710 Ra orted Mar 1$, 1593 <br /> :Attention Ron Chew QC Sample Coup 3038401-04 P fi <br /> QUALITY CONTROL DATA REPORT <br /> ANAL ETyi- <br /> Benzene 'toluene Benzene Xylenes <br /> Method. EPA 602 EPA 602 EPA 602 EPA 602 <br /> Analyst' T Mascarenas T Mascaranas T Mascarenas T Maeoarenas <br /> Concentratlort10�9/� 15pg/L <br /> Spiked: 10 pg/l. 10 ug/L <br /> LC5 Batch#' M8031593 MBM1593 MB031593 M8031583 <br /> Date Prepared: 3/15/93 3/15/93 3/15/93 3/15/93 <br /> Dato Analyzed 3/15/93 3/15/93 3/15/93 3/15/93 <br /> . Instrument I.D #= N ti NA NA N A <br /> LC3 % <br /> Recovery: 106 107� 110 107t� <br /> Control Limits- 80-120 <br /> 80-120 80-120 90-120 <br /> MS/MSD <br /> Batch#. M13031593 M5031593 MB031593 MB031593 <br /> Date Prepared. 3/15/93 3/15/93 3/15/93 3/15/93 <br /> Date Analyzed 3/15/93 3115/93 3/15/93 3/15/93 -t•FItS REPORT HAS BEEN <br /> Instrument I D,#. NA NA N A. NA <br /> APPROVED AND REvtEwr=D BY <br /> Matrix Spike 107 <br /> % Recovery' 108 107 11a <br /> Matrix Spike � <br /> 104 <br /> Duplicate% <br /> 1aa 1oa <br /> Recovery 107 ESBL PROJECT MANAGER DATE <br /> Relative% 60 30 <br /> Difference 40 <br /> 3 0 <br /> Please ota <br /> The t.CS is a Control sampje of krlcwn,interferon,free matrix that Is analyzed using the ssme refigetrtsy <br /> SEQUOIA ANALYTICAL preparation and analytical methods employed for the samples The l_CS%recovery� g asadvisoryis uVed fOc <br /> validation of sample batch results C=ja to matnx eftacts the QC llmits for MS/ <br /> `( � y cnly <br /> and are not used to accept or reject trach resurts <br /> t � 3C38401 ANG ¢4> <br /> �Tenlfer A Nelson <br />