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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364.9600 FAX(415) 364-9233 <br /> Analytiea1 404 N.1g,t Lane W_', :reek,CA 94598 (510) 988-9600 FAX(510)988.9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921.9600 FAX(916)921.0100 <br /> 5f;:`.::^;;;::'ap:;•:,v:r,':::�c'y:;?:i?1�\�rY,:K,xr,..:fivi /r/%-nfrf///�r1+rf 1 .•".^•.^.23`;x?i'•;tt?fit\;;^::.�.tac;\r��.,�\rc::^anr.a:. \ 'i �n� r��q� <br /> <Alton Geosclence 41 �/f Hi///�l/f :f»// :lv.:rr• ••}:.,\-:•::rvJ••\` \\ � 4.:{f%: \ ���d�� 1y1\xY Gv tlu :l nl\U1 h\yKJKK4 f� h{\Yy }:ri:h\:il�W, <br /> Cl�nt f�roject�D: Mobil 0443 <br /> 30-A Lindbergh Ave. Matrix: Solid <br /> n Livermore, CA 94550 <br /> Attention: Ailsa LeMay QC Sample Group: 5060180-89 Reported: Jun. ....... p U 12, 1995:;: <br /> ' QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xyfenes <br /> Benzene <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 9020 <br /> Analyst: J.Fontecha J.Fontecha J. Fontecha J. Fontecha <br /> MS/MSD <br /> Batch#: 5060186 5060186 5060186 5060186 <br /> ' Date Prepared: 6/7/95 6/7/95 6/7/95 6/7/95 <br /> Date Analyzed: 6/7/95 6/7/95 6/7/95 6/7/95 <br /> Instrument I.D.#: HP-2 HP-2 HP-2 HP-2 <br /> ' Conc. Spiked: 0.40 mg/kg 0.40 mg/kg 0.40 mg/kg 1.2 mg/kg <br /> Matrix Spike <br /> % Recovery: 103 105 110 111 <br /> Matrix Spike <br /> Duplicate % <br /> ' Recovery: 103 105 113 110 <br /> Relative % <br /> Difference: 0.0 0.0 2.7 0.90 <br /> , :<$`:` .rpr i:.xxyy:..isr:<;•}�.fir::.,.;•..;rx.;?.:?.:.yy,:,,.:ev.:,:!?.--:::::.w, <br /> .........:..:.:�--.....:...r................:.:......:..:..:::.:.v:.:.n..r.....:..:.::.qtr-: ..:..:r.::.:.....v..::. ..... <br /> :•.::•:::.�::::...s.......:::::..:......:::....:...r::r:.�r`:i:0 •:til-:::Ji}:.:'r:'':-':.}::v•::;_i;.:.?:?�::.:is?r:�: n.?•:}:-ii:•�r:h;-:;:.y}:u•Y?•ii:�:Cti.}.:'._.' <br /> ' LCS Batch#: 1LCS060795 1 LCS060795 ILCS060795 iLCS060 95 7 �n <br /> Date Prepared: 6/7/95 6/7/95 6/7/95 6/7/95 <br /> Date Analyzed: 6/7/95 6/7/95 6/7/95 6/7/95 <br /> Instrument I.D.#: HP-2 HP-2 HP-2 HP-2 <br /> ' LCS % <br /> Recovery: 113 114 123 120 <br /> Recovery <br /> Control Limits: 55-145 47-149 47-155 %140 <br /> Please Note: <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> r SEQUOIA ANALYTICAL,#1271 preparation,and analytical methods employed for the samples. The matrix spike Is an aliquot of sample <br /> fortified with known quantities of speck 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 /> Vevin—VaVS41ambok <br /> Interference,the LCS recoverV is to be used to validate the batch. <br /> Project Manager , <br /> 5060i80.AlT c9> <br />