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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 ® FAX (916) 921-0100 <br /> +y ID C <br /> o-�<o� ,.:.v.cv.r,L'%Jrrlrriv}rli/ iw`°�'-�,..Client ProjeyA <br /> v gugro' est, Inc Project 1ltramarJBeacon #695, <br /> j050 Melody Lane, Ste 160 Matrix Water ` <br /> aseville, CA 95678 <br /> Attention Shelia Richgels OC Sample Group 3020942-956 Reported Mar 28, 1994 <br /> .t r n r +/s .. r M1 •J' r r n 4 fit . r ..xf n . u + r +u r r r v + r r r <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method- EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst- C Chapman C Chapman C Chapman C Chapman <br /> Concentration <br /> Spiked- 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Batch#- LCS032494 LCS032494 LCS032494 LCS032494 <br /> Date Prepared. 3/24/94 3/24/94 3/24/94 3/24/94 <br /> Date Analyzed: 3/24/94 3/24/94 3/24/94 3/24/94 <br /> Instrument I D.#- HP-1 HP-1 HP-1 HP-1 <br /> LCS % <br /> Recovery: 103 98 99 91 <br /> Control Limits: 80.120 80-120 80.120 80-120 <br /> MS/MSD <br /> Batch#- 4030948 4030948 4030948 4030948 <br /> Date Prepared: 3/24/94 3/24/94 3/24/94 3/24/94 <br /> Date Analyzed: 3/24/94 3/24/94 3/24/94 3/24/94 <br /> Instrument I.D.#• HP-1 HP-1 HP-1 HP-1 <br /> Matrix Spike <br /> % Recovery- 110 110 110 110 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 110 100 100 107 <br /> Relative% <br /> Difference- 00 95 95 28 <br /> SEQUOIA ANALYTICAL Please Note <br /> The LCS is a control sample of known interferent free matnx that is analyzed using the same reagents, <br /> C•cL 9 .4 preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> E' validation of sample batch results Due to matrix effects,the QC limits for MS/MSDs are advisory only <br />,L, unda CLnelder and are not used to accept or reject batch results <br /> Project Manager <br /> 4030942 FUG <4> <br />