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j SEQUOIA ANALYTICAL <br /> 680 Chesapeake Redwood Y. <br /> (415) 364-9600 FAX(415)364-9233 <br /> I r <br /> oc:. ,• + n,+<<+c+�+'w'c x:,�X:d+?fvav.. „A,,a ++t r s.} .,. cp t tt f kr ^xrs •. r.q v'$::cbnC��t'dt5t w .c,nxr tS,,rb 3t.,:.rrxu wY *c v+rrrsx^Afot 3?.,�ear-d <br /> x RESNA+ Client Project ID 150002~01, Laidlaw Corp <br /> 1710 Main Street Matrix Solid <br /> Escalon, CA 95320 .f <br /> {Attention John LanOC Sample Group 3JG7101-30e <br /> 993 <br /> Reported Nov 12, 1 <br /> .ca^�. v ,,,., ,� }xAGh+fi¢.,efi w3N}30,+Yx ax•r� A�vx:x �'•.1?rN�:c�.,f�`''rxrro v c>nfi+F',xnrr`'rr r;>,ws�r.�.',:ai�o`,Rs:.7,.,`+ sSsa�c,a xJr ter'+,rr2.tir,er+vA.2fi a,xa+r:.a�`::�+ �in?ra .o-.eS;tw.nw� <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> Method. EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst. E Cunanan E Cunanan E Cunanan E Cunanan <br /> MS/MSD <br /> Batch#: 3K23805 31(23805 3K23805 3K23805 <br /> Date Prepared: 11/9/93 11/9/93 11/9/93 11/9/93 <br /> Date Analyzed: 11/9/93 11/9/93 11/9/93 11/9/93 <br /> Instrument I.D.#: GCHP-18 GCHP-18 GCHP-18 GCHP-18 <br /> Conc. Spiked- 0 20 mg/kg 0 20 mg/kg 0 20 mg/kg 0 60 mg/kg <br /> Matrix Spike <br /> % Recovery: 95 100 105 102 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 95 100 105 102 <br /> Relative% <br /> Difference: 00 00 00 00 <br /> DO <br /> LCS Batch#: - - - <br /> Date Prepared; - - - - <br /> Date Analyzed: - - - <br /> Instrument I.D #: - - - <br /> LCS% <br /> Recovery: - - - - <br /> % Recovery <br /> Control Limits: 55-145 47-149 47-155 56-140 <br /> Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> YYE NALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> forted wdh known quantities of specific compounds and subjected to the entire analytical procedure If <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> ague <br /> Project Manager 3JG7101 WAT <4> <br />