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Sequoia 1580 Chesapeake grive Redwood City,CA 94063 (415) 364 9600 FAX(41S) 364 9233
<br /> 404 N 'W,Bet Lane Walnut Cleek,CA 94598 (510) 988-9600 FAX(510)988 9673
<br /> A nal)gical 819 5trtl er Avenue Suite A Sacramento,CA 95834 (916) 921 9600 FAX(9)6)921 0100
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<br /> '�+aett er- tyan Client Project lD Chevron 49-1918, Stockton, d ^�
<br /> 3164 Gold Camp far, Suite 240 Matrfx Soil
<br /> Rancho Cordova, CA 95670 :a
<br /> I;Attention Greg Guess QC Sample Group 611-0894 Reported Nov 27, 1996
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<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. S Phillips S Phillipe S Phillipa S Phillips
<br /> Concentration
<br /> Spiked 0 20 mg/kg 0 70 mgJkO 0 20 mg/kg 0 60 mg/kg
<br /> LCS Batch#: LCS112606 LCS112696 LCS112696 LCS112696
<br /> Date Prepared 11/26/96 11/26/96 11/28/08 11/26/96
<br /> Date Analyzed, 11/26/96 11/26/08 11/26/26 11/26/gB
<br /> Instrument I D GCHP-7 GCHP-7 GCHP•? GCHP-7
<br /> •
<br /> Recovery
<br /> ' Recoveryt02 104 105 105
<br /> t i
<br /> Control Limits' 70 130 70-130 70 130 70.130
<br /> I
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<br /> MS/MSD
<br /> Batch#' 6110972 6110872 6110972 6110972
<br /> i
<br /> jtate Prepared, 11/26/86 11/20/08 11/26/06 11/26/98
<br /> Date Analyzed. 11/26/ss 11/26/98 11/28/96 11/26/96
<br /> Instrument 1 D # GCHP-7 GCHP-7 GCHP.7 GCHP-7
<br /> I
<br /> Matrix Spike
<br /> o%o Recovery- 101 100 101 102
<br /> Matrix Spike
<br /> Duplicate%
<br /> Recovery 100 104 104 104
<br /> Relative%
<br /> Difference- 10 39 29 19
<br /> SEO UOIA ANALYTICAL Pleaso Notts
<br /> The LCS Is a oontrol sample of Mown,lnterlerent free matrix that Is analyzed using the same reagents,
<br /> I*N.1A fUl, K%�EVL preparation and analytical methods employed for the samples The LCS%reoov"data Is used for
<br /> validation of sample batch rasulta Otia to rnatr'ut offecta,tha OC limits for MS/MSQ's are advisory only
<br /> f=clan M Selseliner and are not used to accept or reject batch restilts
<br /> }
<br /> Project Manager/Sacramento Lobos ory
<br /> �I 6110894 GER ,3>
<br />
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