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Sequoia 680 Chesapeake Dave Redwood Qty,C.4 94063 (415) 364-9600 FAX(415) 364.9233 <br /> a- ) 404 N Wlge,Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> ,P Analytical 819 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> xv �qv i� <br /> qgrd'V�ek,-In'c Client Pioject Ib Exxon 47-0137, Stockton x A. ' <br /> 050 Melody Lane, Ste 160 matrix Water <br /> Roseville, CA 95678 <br /> Attention Mark Naugle OC Sample Group 6011075-81 Reported Feb 7, 1996 <br /> l v r ^hwn 4 ♦ t »N �~ r f[00(UL�Ci'w�� v v~ .. xti r rve t . vrix rN...a v WCn. . . ~ 1 r r��h rC,. v <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method: EPA 8020 BPA 8020 BPA 8024 EPA 8020 <br /> Analyst: V Owens V Owens V Owens V Owens <br /> Concentration <br /> Spiked, 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Batch#: LCS020596 LCS020596 LCS020596 LCS020596 <br /> Date Prepared: 02/05/96 02/05/96 02/05/96 02/05/96 <br /> Date Analyzed, 02/05/96 02/05/96 02/05/96 02/05/96 <br /> Instrument 1.10 #• GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> LCS <br /> Recovery* 84 86 85 86 <br /> Control Limits: 75-125 75-125 75.125 75-125 <br /> MS/MSD <br /> Batch#: 6011038 6011038 6011038 6011038 <br /> Date Prepared: 02/05/96 02/05/96 02/05/96 02/05/96 <br /> Date Analyzed. 02/05/96 02/05/96 02/05/96 02/45/96 <br /> Instrument LD #• GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> Matrix Spike <br /> % Recovery: 87 94 91 94 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 96 97 97 98 <br /> Relative% <br /> Difference: 98 31 64 42 <br /> SEQUOIA ANALYTICAL Please Note <br /> /J The LCS is a control sample of known,interferent five matrix that is analyzed using the same reagents, <br /> �/� / preparation and analytical methods employed for the sampies The LCS 96 recovery data is used for <br /> l�C L L./c� validation of sample batch results Due to matrix effects,the CC omits for MS/MSG's are advisory only <br /> Linda C Sc Heider and are not used to accept or reject batch results <br /> Project Manager/Sacramento Laboratory <br /> 6011075 FUG <7> <br />