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SE000lA*ANALYTlGAL � <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> G roundwater Technology Client Project ID " 6207646i5 00/S <br /> 4501 Pershing <br /> 1401 Halyard Drive, Suite 140 Matra: Soil <br /> West Sacramento, CA 95691 <br /> Attention Bruce Eppler QC Sample Group 309-0815 Reported Sep 28 1993 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl <br /> Benzene Toluene benzene Xylenes Lead <br /> Method: EPA 6020 EPA 8020 EPA 8020 EPA 8020 EPA 6010 <br /> Analyst: C.Chapman C.Chapman C.Chapman C.Chapman S.Foster <br /> Concentration <br /> Spiked: 0.20 mg/kg 0.20 mn/kg 0.20 mg/kg 0.60 mg/kg 12.5 mg/k9 <br /> LCS Batch#: LCS092793 LCS092793 LCS092793 LCSD92793 LCS092493 <br /> Date Prepared: 9/27/93 9/27/93 9/27/93 9/27/93 9/24/93 <br /> Date Analyzed: 9/27/93 9/27/93 9/27/93 9/27/93 9/27/93 <br /> Instrument I.D.#: HP-1 HP-1 HP-1 HP-1 PE-40 <br /> LCS % <br /> Recovery: 105 100 los 103 e1 <br /> Control Limits: 80-120 60-120 80.120 80.120 80-120 <br /> <: ..,.. >..3:,.x <br /> MS/MSD <br /> Batch#: 3090751 3090751 3090751 3090751 3090709 <br /> Date Prepared: 9/27/93 9/27/93 9/27/93 9/27/93 9/24/93 <br /> Date Analyzed: 9/27/93 9/27/93 9/27/93 9/27/93 9/27/93 <br /> Instrument I.D.#: HP-1 HP-1 HP-1 HP-1 PE-40 <br /> Matrix Spike <br /> % Recovery: 105 95 100 97 97 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery: 105 95 95 95 96 <br /> Relative % <br /> Difference: 0.0 0.0 5.1 2.1 1.0 <br /> Please Note: <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL preparation and analytical methods employed for the samples. The LCS%recovery data Is used for <br /> validation of sample batch results. Due to matrix effects,the OC limits for MS/MSD's are advisory only <br /> and are not used to accept or reject batch results. <br /> k 94c' <br /> Linda C. Schneider <br /> Project Manager 3090815.GRW <3> <br />