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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> &grrr�West, <br /> ft^,rr?i.tL a�yo n„ ✓jrh`%IIG r,•�7a yC-�-rl.i«e.,n.,t.FPr,rorler cr`t•r ihl)...ro,ro r,ilds, ,;r..1.r.r41 N+ Er`;Da rorac1a,cSvt,.o^cOYrkto..n,.,v CA. <br /> r <br /> 50 Melody Lane, Ste 160 Matrix Water <br /> r <br /> osevllle, CA 95678 <br /> Attention Paul Graff QC Sample Group 404-0118 Reported Apr 18, 1994 <br /> " ' .r }rvi:�rriirnci'..`�'ti Yom: ry <br /> QUALITY CONTROL DATA REPORT <br /> ANALYT Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst. 0 Ballard D Ballard D Ballard D Ballard <br /> Concentration <br /> Spiked: 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Batch#' LCSO41594 LCSO41594 LCSO41594 LCSO41594 <br /> Date Prepared: 4/15/94 4/15/94 4/15/94 4/15/94 <br /> Date Analyzed' 4/15/94 4/15/94 4/15/94 4/15/94 <br /> Instrument I D # HP-1 HP-1 HP-1 HP-1 <br /> LCS % <br /> Recovery• 104 99 105 104 <br /> Control Limits, 80-120 80-120 80-120 80-120 <br /> MS/MSD <br /> Batch #- 4040465 4040465 4040455 4040465 <br /> Date Prepared. 4/15/94 4/15/94 4/15/94 4/15/94 <br /> Date Analyzed: 4/15/94 4/15/94 4/15/94 4/15/94 <br /> Instrument I.D.#• HP-1 HP 1 HP-1 HP-1 <br /> Matrix Spike <br /> % Recovery 100 94 100 107 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 100 97 94 97 <br /> Relative % <br /> Difference: 00 31 62 98 <br /> SEQUOIA ANALYTICAL Please Note <br /> 1 , The LCS is a control sample of known interferent tree matrix that is analyzed using the same reagents, <br /> / r preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> validation of sample batch results Due to matrix effects the QC limits for MS/MSD's are advisory only <br /> Linda C Schneider and are not used to accept or reject batch results <br /> Project Manager <br /> 40401118 FUG <G> <br />