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Sequoia <br />Analytical <br />Blaine Tech Services, Inc <br />985 Timothy Drive <br />San Jose, CA 95133 <br />Attention Jim Keller <br />680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 <br />9u4 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 <br />819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 <br />Client Project ID Chevron 9-5075, 950727-K1 <br />Matruc Liquid <br />Work Order # 9507139 -01-06 <br />QUALITY CONTROL DATA REPORT <br />LCS #' - - <br />Prepared Date: - - - <br />Analyzed Date. - <br />instrument I D # <br />Conc Spiked* - <br />LCS Result. - - <br />LCS % Recov. - - <br />LCS 71-133 <br />Control Limits <br />40 SE9U 2 <br />A ANALYTICAL <br />eggy Penner <br />Project Manager <br />72-128 <br />72-130 <br />Xylenes <br />GCO80195BTEX03A <br />EPA 8020 <br />EPA 5030 <br />J Minkel <br />9507H9903 <br />ND <br />8/1/95 <br />8/1/95 <br />GCHP3 <br />30 Ng/L <br />33 <br />110 <br />28 <br />93 <br />16 <br />0.50 <br />71-120 <br />FAX (415) 364 9233 <br />FAX (510) 988 9673 <br />FAX (916) 921 0100 <br />Reported Aug. 8, 1995 <br />Please Note <br />The LCS is a control sample of known, interferent -free matrix that is analyzed using the same reagents, <br />preparation, and analytical methods employed for the samples The matrix spike +s an aliquot of sample <br />fortified with known quantities of specific compounds and sub)ected to the entire analytical procedure ff <br />the recovery of analytes from the matrix spike does not fall within specified control limits due to Matrix <br />interference, the LCS recovery is to be used to validate the batch <br />** MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative % Difference 9507139 BLA <i> <br />Analyte <br />Benzene <br />Toluene <br />Ethyl <br />Benzene <br />OC Batch#: GCo80195BTEX03A <br />GCO80195BTEX03A <br />GCO80195BTE CO3A <br />Analy. Method <br />EPA 8020 <br />EPA 8020 <br />EPA 8020 <br />Prep Method <br />EPA 5030 <br />EPA 5030 <br />EPA 5030 <br />Analyst. <br />J Minkel <br />J Minkel <br />J Minkel <br />MS/MSD # <br />9507H9903 <br />9507H9903 <br />9507H9903 <br />Sample Conc <br />NO <br />No <br />N D <br />Prepared Date <br />8/1/95 <br />8/1/95 <br />8/1/95 <br />Analyzed Date <br />8/1/95 <br />8/1/95 <br />8/1/95 <br />instrument I D # <br />GCHP3 <br />GCHP3 <br />GCHP3 <br />Conc Spiked <br />1opg/L <br />10yg/L <br />g/L <br />Result: <br />11 <br />11 <br />11 <br />• MS % Recovery <br />110 <br />110 <br />110 <br />Dup. Result <br />11 <br />10 <br />93 <br />MSD % Recov : <br />110 <br />100 <br />93 <br />RPD. <br />00 <br />95 <br />17 <br />RPD Limit <br />050 <br />0-50 <br />0-50 <br />LCS #' - - <br />Prepared Date: - - - <br />Analyzed Date. - <br />instrument I D # <br />Conc Spiked* - <br />LCS Result. - - <br />LCS % Recov. - - <br />LCS 71-133 <br />Control Limits <br />40 SE9U 2 <br />A ANALYTICAL <br />eggy Penner <br />Project Manager <br />72-128 <br />72-130 <br />Xylenes <br />GCO80195BTEX03A <br />EPA 8020 <br />EPA 5030 <br />J Minkel <br />9507H9903 <br />ND <br />8/1/95 <br />8/1/95 <br />GCHP3 <br />30 Ng/L <br />33 <br />110 <br />28 <br />93 <br />16 <br />0.50 <br />71-120 <br />FAX (415) 364 9233 <br />FAX (510) 988 9673 <br />FAX (916) 921 0100 <br />Reported Aug. 8, 1995 <br />Please Note <br />The LCS is a control sample of known, interferent -free matrix that is analyzed using the same reagents, <br />preparation, and analytical methods employed for the samples The matrix spike +s an aliquot of sample <br />fortified with known quantities of specific compounds and sub)ected to the entire analytical procedure ff <br />the recovery of analytes from the matrix spike does not fall within specified control limits due to Matrix <br />interference, the LCS recovery is to be used to validate the batch <br />** MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative % Difference 9507139 BLA <i> <br />