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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> (415) 364-9600 FAX (415) 364-9233 <br /> `FiESNAYn I Jafr r w� ,,.rr ,`. r+. .ata`rrr .r n ;r• ,rn {r,yr.xa r:^s,rar.+.ard�nr.a.-s.; <br /> Client Project ID W0322 00,J B Terminal, Tracy <br /> 1710 Main Street Matrix Water <br /> PEscalon, CA 95320 x <br /> ,'Attention Lois Frantz OC Sample Group 3G55202-4 Reported Jul 22, 1993 >k <br /> ,} r rr 'r+. r: . ,.,, t r `� ih Y ♦ +v ,. r „n ,.or rr ` «,j.v}� + ry <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method- EPA 8020 EPA 8020 EPA 8020 EPA 6020 <br /> Analyst J Fontcha J Fontcha J Fontcha J Fontcha <br /> Conc. Spiked 20 20 20 60 <br /> Units* N9/L u9/L u9/L pg/L <br /> LCS Batch# LCS072093 LCS072093 LCS072093 LCS072M <br /> Date Prepared: 7/20/93 7/20/93 7/20/93 7/20/93 <br /> Date Analyzed: 7/20/93 7/20/93 7/20/93 7/20/93 <br /> Instrument 1.13 #: GCHP-4 GCHP-4 GCHP-4 GCHP-4 <br /> LCS % <br /> Recovery. 90 92 93 96 <br /> Control Limits: 70.130 70.130 70-130 70-130 <br /> MS/MSD <br /> Batch#. 3070533 3070533 3070533 3070533 <br /> Date Prepared, 7/20/93 7/20/93 7/20/93 7/20/93 <br /> Date Analyzed: 7/20/93 7/20/93 7/20/93 7/20/93 <br /> Instrument I.D.#- GCHP-4 GCHP-4 GCHP-4 GCHP-4 <br /> Matrix Spike <br /> % Recovery: 90 95 95 96 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 90 90 90 95 <br /> Relative% <br /> Difference a 0 54 54 10 <br />. SEQUOIA ANALYTICAL Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> uY Y (L{ validation of sample batch results Due to matrix effects,the OC limits for MS/MSD's are advisory only <br /> Vickie Tague and are not used to accept or reject batch results <br /> Project Manager 3G55201 WAT <3> <br />