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SEQUOIA ANALYTICAL <br /> L 680 Chesapeake Drive • <br /> Redwood City, CA 94063 <br /> (415) 364-9600 • FAX (415) 364-9233 <br /> ppwy� x <br /> „4cp e;a;v w,. , ew ;; swrr-x�rw .^ v. �p:� �+'.+�vrQ• r,� r 'v'a'� '�"' �""� �.z"pr"Y""`'"£n':.. ,,.,'a`' o <br /> RESNA Oient Project ID W0475 13, Point <br /> 0710 Main Street k <br /> Escalon, CA 95320 v>< <br /> >Attention Tina Le Page OC Sample Group 2061861-2 Reed Jun 16, 1992 ;$ <br /> }��;� rv.�.,, > i nn.x N c;,.rf o-s R- <br /> �e-411 .r,3„k,3 ,., $'ro�i orxo 11 kaa.w�w�",J,..,v;,3 o„aiwc..M s 1�,r..�.�fi �-191,wr.�e--k5o <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Eth* <br /> Benzene Toluene benzene Xylenes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst M Mpp M Nipp M Nipp M Nipp <br /> Reporting Units pg/L pg/L us/L u9/L <br /> Date Analyzed Jun 11, 1992 Jun 11, 1992 Jun 11, 1992 Jun 11, 1992 <br /> OC.Sample# GBLK061192 GBLK061192 GBLK061192 GBLK061192 <br /> MS/MSD MS/MSD MS/MSD MS/MSD <br /> ' Sample Conc.: N D N D N D N D <br /> Spike Conc. <br /> Added: 10 10 10 30 <br /> ' Canc. Matriu <br /> Spike- 10 10 10 31 <br /> ' Matrix Spike <br /> %Recovery: 100 100 100 103 <br /> Canc. Matrix <br /> Spike Dup.: 11 11 11 32 <br /> ' Matrix Spike <br /> Duplicate <br /> %Recovery: 110 110 110 107 <br /> ' Relative <br /> % Difference. 95 95 95 32 <br /> SEQUOIA ANALYTICAL %Recovery Conc of M S -Conc of Sample x 100 <br /> Spike Canc Added <br /> Relative%D+fference Conc of M S -Conc of MSD x 100 <br /> a e W r (Cont of M S + Conc of M S D) 2 <br /> P olect Manager 2061861 WAT <2' <br />