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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> (415) 364-9600 • FAX(415) 364-9233 <br /> x3n ry Sx43.v '{r}~vµww+ru4i..i{n vY3+h rx vS 4 Yr 'M-i..x c r}'t}ii `.Wf}Mx+Sirvwn+nw2h+'V"wi.'?Y w `�n nr�I.s*iti\�rtirWrntiv t^y3vt y nyvx4Yw �"�ct�,['�� r�`ri <br /> ,s.�r �' i '4}b"�`��ry.•vvi uivr w hnhVJ}AtnV3V� <br /> x xi~µV` v]r n1 ns „uv[ r e^sw`S{}�v,i rvxx ry}sk vv� �yM;{ i`i'4r'x2`'}`rte'S�33h rfiCi xv ♦ r 30. '�mrvm wxr�v u <br /> RE-SNA Client Project ID'W0388, Reeves Exxon/Tracy r <br /> �s 1710 Main Street <br /> Escalon,CA 95320 <br /> ,Attention Greg Stahl _ _ OC Sample Group 204-4326 x,._ _ Reported May 7, 1992 f <br /> z3s3 w . }s . <br /> ♦rrr{i Oar rr +-.J'>`Ln ♦ i.MCrrc r: xir3r nr t riA`wv�v rvi~~�i if O}x4ven r4r 3'r.xr w 4rJ`ry o}rhrrr i+.\C wSnj n`�Wx'riJ"r5"$}rw v'rrirrir�3 Uvv..o+x��n rr}`vv$ rt R>l\k��^r.`'Fr4fiti+�ihn Ys'f <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE STLC STLC STLC Hexavalent Hexavalent STLC STLC <br /> Silver Vanadium Thallium Chromium Chromium Lead Nickel <br /> Method EPA 200 7 EPA 200 7 EPA 200 7 EPA 7196 EPA 7196 EPA 200 7 EPA 200 7 <br /> Analyst M Mistry M Mistry M Mistry V Ankaitrs V Ankadis M Mistry M Kstry <br /> Reporting Units mg/L mg/L mg/L mg/kg mg/L mg/L mg/L <br /> Date Analyzed May 1, 1992 May 1, 1992 May 1, 1992 Apr 24, 1992 May 5, 1992 May 4, 1992 May 4, 1992 <br /> QC Sample# 2045091 204-5091 204-5091 204.3186 204-4326 244-5091 2045091 <br /> Sample Conc.. N D 0 085 N D N D N D N D N D <br /> Spike Conc. <br /> Added: 10 10 10 50 050 10 10 <br /> Conc. Matrix <br /> Spike: 83 86 79 53 047 81 83 <br /> Matrix Spike <br /> %Recovery. 83 85 79 106 94 81 83 <br /> Conc. Matrix <br /> Spike Dup : 86 89 81 59 045 83 85 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery: 86 88 81 108 90 83 85 <br /> Relative <br /> % Difference: 36 34 25 19 44 24 24 <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 /> IrLee Conc of M S + Conc of M S D) 2 <br /> 1' oject Manager 2044326 WAT 411> <br />