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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City,CA 94063 <br /> {415} 364-9600 • FAX(415) 364-9233 <br /> o,cn-c,.,;a KsaP�,aa.�:t fsr S�x�i•.z��aac*c��r; xr�sr z�ra ac n, o:�r�r�ta`'cu;C` ��*�.*��;a�tic��sk`,��:L���a�3`�'�w,�`�`•,r -1 <br /> Waterwork <br /> Client Project ID W0475,Weber Point <br /> 1 1710 Main Street <br /> Escalon, CA 95320 <br /> lAttention. Tina Le Page OC Sample Group 2042426-7 Reported Apr 17 1992 <br /> 'w}`." #=`h 5:x r+ygw, r rt arv.as+-rrr�uny»u f .w��W♦.'vr.s sem,. .w>....w.a�k�:r,^.^ n..r. ,-... ..�.�L.. ,.�ac...,cv � r.n w �� �*7 "w <br /> x.,.,K:rG��arr�,�S,.kw^,,,�aw<�oawY'P.`zww.°3ccscor u�,cfdt�",weo-��:ssi.ocG�b�«.3 °.co-3•kd;caE hb�,� a,.y.6,�,,s..,,,..;af.V h41\�r.S',,, x.ca..a:'.%.;Cc?sxa...'.:r2�„�.ti8�x..'::fw.aat'�{,,�sx�"kW 'i�5.r-y r` <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene benzene Xylenes <br /> Method- EPA 8020 EPA 8020 EPA 8024 EPA 8020 <br /> Analyst L Latkhtman L Laikhtman L Latkhtman L Laekhtman <br /> Reporting Units lig/L Pg/L yg/L pg/L <br /> Date Analyzed Apr 15, 1992 Apr 15, 1992 Apr 15, 1992 Apr 15 1992 <br /> OC Sample#- GBLK041592 GBLK041592 GBLKD41592 GBUc041592 <br /> Sample Cone.: N D. N D N D N D <br /> Spike Cone. <br /> . Added: 10 10 10 30 <br /> Cone Matrix <br /> Spike: 94 96 95 29 <br /> i <br /> i <br /> Matrix Spike <br /> % Recovery: 94 96 95 97 <br /> Corte. Matrix <br /> Spike Delp.: 91 9.3 91 27 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery: 91 93 91 90 <br /> Relative <br /> % Difference: 32 32 43 71 <br /> SEQUOIA ANALYTICAL %F*covery Cone of M S -Conc of Sample x 100 <br /> Spike Cone Added <br /> i L Relative%Difference Conc of M S •Conc of M S D X 100 <br /> {Cone of M S + Cone o(MSD)/2 <br /> P oject Manager 2042426 WAT <3> <br />