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Sequoia 00 Chesapeake Drive Redwood City,CA 94063 0, 15) 364-9600 FAX(415) 364-9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 10) 988-9600 FAX(510)988-%73 <br /> WNW Analytical <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 16) 921-9600 FAX(916)92 1.0100 <br /> CI!6hf P6ject <br /> ' lb Countryside Market <br /> o <br /> 1017 26th St. Matrix: <br /> Soil <br /> Sacramento, CA 95816 <br /> Attention: Vic CherVen QC Sample Group 511-0290 Reported: Nov 9, 1995 <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: V.Owens V.Owens V.Owens V.Owens <br /> Concentration <br /> Spiked: 0.20 mg/kg 0.20 mg/kg 0.20 mg/kg 0.60 mg/kg <br /> LCS Batch#: LCS110995 LCSl 10995 L08110995 LCS110995 <br /> Date Prepared: 11/9/95 11/9/95 11/9/95 11/9/95 <br /> Date Analyzed: 11/9/95 11/9/95 11/9/95 11/9/95 <br /> Instrument I.D.#: GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> LCS % <br /> Recovery: 83 85 86 85 <br /> Control Limits: 75-125 75-125 75-125 75-125 <br /> MS/MSD <br /> Batch #: 5110370 5110370 5110370 5110370 <br /> Date Prepared: 11/9/95 11/9/95 11/9/95 11/9/95 <br /> Date Analyzed: 11/9/95 11/9/95 11/9/95 11/9/95 <br /> Instrument I.D.#: GCHP-1 GCHP-1 GCHP-1 GGHP-1 <br /> Matrix Spike <br /> % Recovery: 77 80 81 82 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery: 82 84 86 87 <br /> Relative % <br /> Difference: 6.3 4.9 7.2 5.9 <br /> SEQUOIA ANALYTICAL Please Note: <br /> 4"r-- The LOS is a control Sample of known,interferent free matrix t!'at is analyzed using the Same reagents, <br /> ,oreparation and analytical methods employed for th:,stam I The LOS%recovery data is used for <br /> validation of sample batch results. Due to me , P: <br /> trio, effects, <br /> th C limits for MS/MSDS are advisory only <br /> Janet IfI41an and are not used to accept or reject batch rest <br /> Project'Manager <br /> 5110290.UPS <2> <br />