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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94053 <br /> (415) 364-9600 FAX(415) 364-9233 <br /> �f� �,,.,..v... r•r ,wn$ o vti +^ ,S u..,,-v.+,. S3".<a <br /> rrrr+�'o-w.� + .,v, v N.w...,,. ywrro vn.ny Rw,.'taul n. i� Y i yM ,e, e o rr n..,,.,.S.aur^^." uxr;+r^yam �,d•S `'Oxv�• <br /> y L. ,. .x 'v.9n.�w.++r v��.4i„xn,� +:cLrh ,4 c` xN�s]xkiJ4•:'+"..s:�..r&+nc-M <br /> < RESNA Client Project ID W0388, Reeves Exxon/Tracy vL <br /> O+ rG <br /> ',',1710 Main Street x <br /> Escalon, CA 95320 <br /> „Attention Greg Stahl OC Sample Group 204-4326 Reported May 7, 1992 <br /> �n r ra..-.s w� ,.�.c.r <br /> 7y?ati�^^',�44+r..�S Sf xii�%b.xc: o +Y�H oi�#r,rfoa^ro'w S .... ,s oc`K ,??r'r`c•� +sS..<-cv fi��r�av^�4<`h9rr:rm <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE STLC STLC STLC STLC <br /> Cadmium Chromium Zinc Copper <br /> Method EPA 200 7 EPA 200 7 EPA 200 7 EPA 200 7 <br /> Anaiyst M Mistry Jut Mistry M Mistry M MEstry <br /> Reporting Units mg/L mg/L mg/L mg/L <br /> Date Analyzed May 4, 1962 May 4, 1992 May 4, 1992 May 4, 1992 <br /> OC Sample# 204-5091 204-5091 204-5091 204-5091 <br /> Sample Conc.: N D 0 038 016 016 <br /> iSpike Conc <br /> Added. 10 10 10 10 <br /> Conc Matrix <br /> Spike 86 84 85 92 <br /> Matrix Spike <br /> %Recovery: 86 84 83 90 <br /> Conc. Matrix <br /> Spike Dup : 88 86 88 95 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery- 88 86 86 93 <br /> Relative <br /> %Difference: 23 24 35 32 <br /> .SEQUOIA ANALYTICAL %Recovery Conc of Jut 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 /> / a la eie Y ' f/� (Conc of M S + Conc of M S D) 2 WAT <12> <br /> I! o�ect Manager <br />