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SEQUOIA ANALYTICAL " 6 Ctf VE0 <br /> 680 Chesapeake Drive • Redwood City, CA 94063 1 `� '' <br /> (415) 364-9600 FAX(415) 364-9233 <br /> qESPiA! <br /> :q <br /> RESNA Client Project ID Ouik Stop #132, Stockton <br /> 3315 Almaden Expwy ,, Suite 34 Matrix Water <br /> San .lose, CA 95118 <br /> Attention Rich Garlow QC Sample Group 3K93401-2 Reported Dec 2, 1993 <br /> IQUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst A.Tuzon A Tuzon A Tuzon A Tuzon <br /> MS/MSD <br /> Batch# 3111625 3111625 3111625 3111625 <br /> Date Prepared. 11/23/93 11/23/93 11/23/93 11/23/93 <br /> Date Analyzed: 11/23/93 11/23/93 11/23/93 11/23/93 <br /> Instrument I D #. GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Conc. Spiked 20Y9/L 20lis/L 20jig/L 60ug/L <br /> Spike <br /> % Recovery: <br /> % Recovery: 105 105 los 108 <br /> Matrix Spike <br /> I Duplicate% <br /> Recovery. 110 105 105 107 <br /> Relative% <br /> Difference 47 0 0 00 0 93 <br /> LCS Batch# LCS112393 LCS!12393 LCS112393 LCS112393 <br /> Date Prepared 11/23/93 11/23/93 11/23/93 11/23/93 <br /> Date Analyzed: 11/23/93 11/23/93 11/23/93 11/23/93 <br /> Instrument I D #' GCHP-2 GCHP-2 GCHP 2 GCHP-2 <br /> I LCS % <br /> Recovery, 113 108 109 110 <br /> % Recovery <br /> Control Limits 71 133 72-128 72-130 71-120 <br /> Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents <br /> SEQUOIA ANALYTICAL preparation and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the enure analytical procedure K <br /> I the recovery of analytes from the matrix spike does not fall within specified control limas due to matrix <br /> `-- interference,the LCS recovery is to be used to validate the batch <br /> Vickie Tague <br /> IProject Manager 3K93ao1 RES <2> <br />