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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (4t5) 364 9600 FAX(415) 364 9233 <br /> I <br /> 1900 Sates Avenue,Suite L Concord,CA 94520 (510) 686 9600 FAX(510)686 9689 <br /> Analytical 819 Stnker Avenue,Suite 8 Sacramento CA 95834 (916) 921-9600 FAX(9t6)921 0100 <br /> ,c <br /> r .. <br /> fugro West, Inc Client Project 11) Shi l, 2575 Country Club, Stockton, CA <br /> 105a Melody Lane, Ste 160 Matrix Soil <br /> Roseville, CA 95678 <br /> Attention Sudhakar Talanki QC Sample Group k Reported May 23, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Lead <br /> Method' EPA 8020 EPA 8020 EPA 8020 EPA 8020 FPA 6010 <br /> Analyst. C Lee C Lee C Lee C Lee K Barts <br /> Concentration <br /> Spiked 0 20 mg/kg o 20 mg/kg 0 20 mg/kg 0 60 mg/kg 50 mg/kg <br /> LCS Batch# LCS051795 LCS051795 LCS051795 LCS051795 LOSOS1095 <br /> Date Prepared 5/17/95 5/17/95 5/17/95 5/17/95 5/10/95 <br /> Date Analyzed 5/17/95 5/17/95 5/17/95 5/17/95 5/15/95 <br /> Instrument I ❑ # GGHP-2 GCHP-2 GCHP-2 GCHP 2 P-40 <br /> LCS <br /> Recovery- 94 94 95 93 98 <br /> Control Limsts' 75-125 75-125 75-125 75-125 84-120 <br /> } <br /> MS/MSD <br /> Batch # 5050566 5050566 5050566 5050566 5050335 <br /> Date Prepared 5/17/95 5/17/95 5/17/95 5/17/95 5/10/95 <br /> Date Analyzed 5/17/95 5/17/95 5/17/95 5/17/95 5/15/95 <br /> Instrument I D.#' GCHP-2 GCHP-2 GCHP-2 GCHP-2 P-40 <br /> Matrix Spike <br /> % Recovery' 93 94 94 94 99 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery' 90 91 92 92 97 <br /> Relative <br /> Difference. 33 <br /> 3 2 2 1 2 1 2 4 <br /> EQUOIA ANALYTICAL Please Note <br /> The LCS is a control sample of known,interferent free matrix that Is analyzed using the same reagents, <br /> / <br /> / 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 QC limits for MS/MSD's are advisory only <br /> Linda C SchTieider and are not used to accept at reject batch results <br /> Project Manager 5050385 FLIG <6> <br />