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- Sequoia 680 apeake Ortve Redwood Cry CA 9406 (654) 364 9600 FAX(654)354-9233 <br /> 444 N Mget t.Ane Walrut Creek CA 94598 (9Z 5)988 9640 FAX(925)988 9473 <br /> IWOAnalytical 819 Salker/,venue 5u1te 8 S4UAn'ento CA 95834 (916)92t 9600 FAX(916)921 0100 <br /> 1455 McOowatl Blvd North Ste 0 Petalunv CA 94954 (707)792 1865 FAX(707)792 0342 <br /> er Ryan/Geostrategies Client Project ID 5886/18137 851-2701 W Marc11A1 <br /> , <br /> Sierra Court, Ste J Matrix Liquid <br /> Dublin, CA 94568 <br /> Attention Deanna Harding Work Order # 9812342 01-02, 05-10 Reported Dec 22, 1998 <br /> 9812344 11-12 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes BTcEX as TPH <br /> Benzene <br /> QC Batch# GC1211988020O A GC121198802002A GC121198402002A GC121198802CO2A GC121198802002A <br /> Analy. Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA SOtSM <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst 0 Newcomb D Newcomb 0 Newcomb D Newcomb D Newcomb <br /> MS/MSD # 8120500 8120600 8120600 812ceco 8 t 20500 <br /> Sample Conc N D N 0 N D N D N D <br /> Prepared Date 12/11/98 12/11/98 12/11/98 12/11/98 12/11/98 <br /> Analyzed Date 12/11/98 12/11/98 12/11/98 12/11/98 12/11/98 <br /> Instrument I D # HP2 HP2 HP2 HP2 HP2 <br /> Conc Spiked 20ug/L 20ug/L 20ug/L 60ug/L 3.,,3ug/L <br /> Result 19 18 18 62 320 <br /> MS % Recovery 95 so so 10.3 94 <br /> Dup Result 19 18 19 82 330 <br /> SD % Recov 95 90 95 103 97 <br /> RPD 00 00 54 00 31 <br /> RPD Limrt 0-20 0.20 0-20 0-20 0-50 <br /> LCS # LCS 121198 LCS 121198 LCS 121198 LCS 121198 LCS 121198 <br /> Prepared Date 12/11/98 12/11/98 12/11/98 12/11/98 12/11/98 <br /> Analyzed Date 12/11/98 12/11/98 12/11/98 12/11/98 12/11/98 <br /> Instrumerrt I D.# HP2 HP2 HP2 HP2 HP2 <br /> Conc Spiked 20ug/L 20Ng/L 20ug/L 50ug/L 30ug/L <br /> LCS Result 19 19 20 64 0-10 <br /> LCS % Recov 95 95 1Co 107 97 <br /> LCS 70-130 70-130 70-130 70.130 50-150 <br /> Control Limits <br /> Please Nate <br /> The LCS is a control sample of known interferent free matrix that is anal,-zed using the same reagents, <br /> C 1 ANALYTICAL preparation, and analytical methods employed far the samples The matrix spike is an aliquot of sample <br /> #12 fortified with known quantities of specific compounds and subjected to the anbre analytical procedure d <br /> the recovery of analytes from the matrix sake does not fall wrthin specified control Ilmrts due to mattlx <br /> Intarference,the LCS recovery Is to be usad to vafldate the batch <br /> T n[cher <br /> ',Pr ect ManNS-Matrix Spike,MSD-MS Cuplica,e PPD-Pelative% Ditference 98123.}2 GET <1> <br />