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SEQU680 OIA ANrive * oALYTICCity, CA AL <br /> (415) 364-9600 FAX (415) 364-9233 <br /> RESIVA..r <br /> Client Project ID W0327�00,4Knowles Property <br /> 1710 Main Street Matnx Water Y� <br /> , <br /> Escalon, CA 95320 4f <br /> Attention John Lane QC Sample Group 3G37701-4,6-7 Reported Jul 19, 1993 <br /> } <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: M Nipp M Nipp M Nipp M Nipp <br /> Conc. Spiked: 10 10 10 30 <br /> Units: ug/L N9/L ug/L u9/L <br /> LCS Batch#: BLK071M BLK071393 BLK071393 BLK071393 <br /> Date Prepared: N/A N/A N/A N/A <br /> Date Analyzed: 7/13/93 7/13/93 7/13/93 7/13/93 <br /> Instrument I.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> LCS % <br /> Recovery: 100 100 99 100 <br /> Control Limits 80-120 80-120 80-120 80-120 <br /> v�~r- <br /> MS/MSD <br /> Batch#: 3G34803 31334803 31334803 3G34803 <br /> Date Prepared: N/A N/A N/A N/A <br /> Date Analyze& 7/13/93 7/13/93 7/13/93 7/13/93 <br /> Instrument I D #: GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Matrix Spike <br /> % Recovery 100 100 100 100 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 100 100 100 100 <br /> Relative% <br /> Difference: 0 0 00 0 0 00 <br /> SEQUOIA ANALYTICAL Please Note <br />. The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> f preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> n� 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 /> Vickie Tague <br /> Project Manager 3G37701 WAT <3> <br />