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j "GU-01A ANA, YTI AL
<br /> 1900 Bates Avenue • Suite LM • Concord,California 94520
<br /> (510) 686.9600 a FAX(510)686-9689
<br /> APR 15 'I993
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<br /> 5870 Stoneridge Drive, SuRe 6 Matrix: Sol
<br /> Pleasanton,CA 94588
<br /> r Atterltbn: Stephan Rosen QC Sample Group 3031247-1257 Reported: Apr 9, 1993
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<br /> QUALITY CONTROL DATA REPORT
<br /> ANALYTE Ethyl- Total Organic
<br /> Benzene Toluene Benzene Xylenes Diesel Carbon
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<br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015 EPA 9060
<br /> Analyst: AP. A.P. A.P. A.P. KWimer KJL
<br /> Cone.Spiked: o.40 0.40 0.40 1.2 10 2600
<br /> Units: M2/KG mg/Kg M91KO rng/Ka m4/Kg m9/KO
<br /> LCS Batch#: 2LCSO40293 21.0*040293 2LCSO40293 2LCSO40293 BLK040193 040193
<br /> Date Prepared: 4/2/93 4/2/93 4/2/93 4/2/93 4/1/93 4/1/93
<br /> Date Analyzed: 4/2/93 4/2/93 4/2/93 4/2/93 4/6/93 4/1/93
<br /> Instrument I.D.#: HP4 HP4 HP4 HP4 HP-3A Jupiter
<br /> • LCS%
<br /> Recovery: 105 105 108 122 85 98
<br /> Control Limits: 70-130% 70.130% 70.130% 70-1304L 7x13096 75-125%
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<br /> MS/MSD
<br /> Batch#: 3040094 3040094 3040094 3040094 3031251 3040013
<br /> Date Prepared: 4/2/93 4/2/93 4/2/93 4/2/93 4/1/93 4/1/93
<br /> Date Analyzed: 4/2/93 4/2/93 4/2/93 4/2/93 4/6/99 4/1/93
<br /> Instrument I.D.#: HP-4 HP-4 HP-4 Hp-4 HP-M Jupiter
<br /> Matrix Spike
<br /> %Recovery: 88 Be 92 100 103 104
<br /> Matrix Spike
<br /> Duplicate%
<br /> Recovery: 90 90 9e 100 too 96
<br /> Relative%
<br /> Difference: 22 22 6.3 0.0 3.0 8.0
<br /> . SEQUOIA ANALYTICAL Please :
<br /> The LCS Is a control sample of known,kftderont tree matrix that is analyzed using the same respereA
<br /> preparation and analytical methods employed for the samples. The LSCS%recovery dans Is used for
<br /> validation of sample batch results. Due to matrix effects,the OC limits for MS/MSD"s are 60A"&*
<br /> and am not used to aocept or reject batch results.
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