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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive Redwood Ci ty, CA 94 <br /> 063 <br /> (415) 364-9600 FAX (415) 364-9233 <br /> ' '/4 t' 3l}72..2Y•Mm'++SGSM Sxx�'��]wn4 Y'S'Fia�4^vF.0 t�f�Svn# "err?'F rvmW'�fr A��?r+iYo.tj lJFn �.�BSA., '".^.,WWW �� <br /> ,RESNA Client Project ID W0475 13, Weber Point <br /> ;1710 Main Street <br /> NEscalon, CA 95320 > <br /> Attention Tina Le Page OC Sample Group 206-0641 Reported Jun 9, 1992 n <br /> ' o,,.. "". vyn,Y,.N,n;,.. .,rr�t tia;,�.yr„t.�..%„„.�,.n.V 4w��•<,yc > ��aAv mouth .ww.,...,,.t "'.s,+rAx O+r>a'�^«,N r�,.,.*a'^^^^^N�'°�3 'v2�;�4 �f 2�s': <br /> tQUALITY CONTROL DATA REPORT <br /> ' ANALYTE E"- <br /> Benzene Toluene benzene Xylenes <br /> ' Method EPA 5020 EPA 8020 EPA 5020 EPA 8020 <br /> Analyst M Nipp M Nipp M Nipp M Nipp <br /> Reporting Units E►g/L pg/L jug/L pg/L <br /> Date Analyzed Jun 4, 1992 Jun 4, 1992 Jun 4, 1992 Jun 4, 1992 <br /> QC Sample# GBLK060492 GBLK060492 GBLK060492 GBLK060492 <br /> MS/MSD MS/MSD MS/MSO MS/MSD <br /> ' Sample Cone.: N D N D N D N D <br /> Spike <br /> Added: <br /> 10 10 10 30 <br /> ' Cone. Matirm <br /> Spike: 10 97 97 29 <br /> ' Matrix Spike <br /> %Recovery: 100 97 97 97 <br /> ' Conc. Matrix <br /> Spike Dup.: 11 10 10 30 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 110 100 100 100 <br /> Relative <br /> %Difference: 95 30 30 34 <br /> SEQUOIA ANALYTICAL %Recovery Conc of M S -Conc of Sample x 100 <br /> Spike Conc Added <br /> Relative%Difference Conc of M S -Conc of M S D X 100 <br /> is ee (Conc of M S + Conc of M S D) 2 <br /> P oject Manager 2060641 WAT <2> <br /> 1 <br />