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680 Chesapeake Drive Redwood City CA 94063 (650)364-9500 FAX(650)364-9233 <br /> , D Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(975)988-9673 <br /> ! Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ATC Associates, Inc Client Project ID Diesel Performance <br /> 1260 Graphics Drive <br /> ' Modesto, CA 95351-1502 <br /> Attention Jeanne Hornsey QC Sample Group 9809H49-01-06 Reported Oct 8, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Solid <br /> Method EPA 8020 <br /> ' Analyst G GAMBOA <br /> ANALYTE Benzene Toluene Ethylbenzene Xylenes <br /> ' QC Batch # GCO929988TEXEXA <br /> Sample No GS9809G63-1 <br /> ' Data Prepared 9129198 9129198 9129198 9129198 <br /> Date Analyzed 9130198 9130198 9130/98 9130198 <br /> Instrument I D # GCHP22 GCHP22 GCHP22 GCHP22 <br /> ' Sample Conc , mg1Kg N D N D N D N D <br /> Conc Spiked, mg/Kg 020 020 0 20 060 <br /> Matrix Spike, mg/Kg 0 18 018 0 18 0 54 <br /> °'a Recovery 90 90 90 90 <br /> Matrix <br /> Spike Duplicate, mg/Kg 0 is 018 0 18 055 <br /> ' % Recovery 90 90 90 92 <br /> Relative % Difference 00 00 00 22 <br /> RPD Control Limits 0-25 0-25 0-25 0-25 <br /> ' LCS Batch# GSLCS092998A <br /> Date Prepared 9129198 9129198 9129198 9129198 <br /> Date Analyzed 9129198 9129198 9129/98 9129198 <br /> ' Instrument I D # GCHP18 GCHP18 GCHP18 GCHP18 <br /> Conc Spiked, mg/Kg 020 020 020 060 <br /> ' Recovery, mg/Kg 020 0 19 020 059 <br /> LCS % Recovery 100 95 100 98 <br /> Percent Recovery Control Limits <br /> MSIMSD 60140 60140 60140 60140 <br /> LCS 70130 70130 70130 70130 <br /> ' Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br /> Please Note <br /> The LCS is a control sample of known interferent free matrix that is analyzed using the some reagents <br /> EQUOIA ANALYTICAL preparation and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure It <br /> r the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> Vinterference the LCS recovery is to be used to validate the batch <br /> IC Gmyai � <br /> rolect Man r <br />