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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415)364-9233 <br /> ' 1900 Bates Avenue,Suite L Concord,CA 94520 (510) 686-9600 FAX(510)686-9689 <br /> Analytical 819 Stnker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)911-0100 <br /> FR <br /> 7ESNA Client Project ID 159906 01, PG&E Tracy <br /> 10 Main Street Matrbc Liquid #6 <br /> Escaion, CA 95320 to <br /> kAttention Bill Channell _OC Sample Group 4D53301-4 Reported � <br /> }O$'iry vvY�Y nv�Ct''R'W Lvivi{�4v,mv� id0.v+. •'�+�'�.w.�.^•+F iSfGG'+.Ov 2�' ��>I'l7rL�CdLv,� ��vL{{vP }4R ''����"" �i £4�"���h��t� n 4Ain�Cr�v�s��, IJh <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: J Minkel J Minkel J Minkel J Minkel <br /> MS/MSD <br /> Batch#: 4D47313 41347313 41347313 4D47313 <br /> ' Date Prepared: - - - <br /> Date Analyzed: 4/12/94 4/12/94 4/12/94 4/12/94 <br /> Instrument I.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> ' Conc.Spiked: 10pg/L loug/L 10ug/L 30ug/L <br /> Matrix Spike <br /> %Recovery: 100 100 100 103 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 110 100 110 103 <br /> Relative% <br /> Difference: 95 00 95 00 <br /> b 4L w++�x}ia ksy.00�i ckoh � .+a;c ro..nA x:•.�` �2�y �.vr�.o-avraf�Yeh;�rit`f•�`.a�} ws` z kYfi �i`b� +cv '�tr to>}�, $�7k2 w <br /> ' LCS Batch#: - - - <br /> Date Prepared: - - - - <br /> Date Analyzed: <br /> instrument I.D.#: - - - <br /> t LCS 96 - - - <br /> Recovery: - <br /> % ecovery <br /> ' Control Limits: 71-133 72-128 72-130 71-120 <br /> Please Note <br /> The LCS Is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> EQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike Is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> �7 f the recovery of analytes from the matnx spike does not fall within specified control limits due to matrix <br /> V� interference,the LCS recovery is to be used to validate the batch <br /> Vickie Tague Clark <br /> Project Manager 4D53301 WAT <2> <br /> 4 <br />