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680 Chesapeake Drive Redwood City CA 94063 (650)3649600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0 100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Woad San Carlos CA 94070-4111 (650)232 9600 FAX(650)232-9612 <br /> Pinnacle Client project 10 Arco #6020, Manteca <br /> 3939 Cambridge Road Matrix Solid <br /> Cameron Park, CA 95682 <br />,Attention Joel Coffman OC Sample Group 9050030-047 Reported May 5, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# SP050499 SP050499 SP050499 SP050499 <br /> 8020EXA 8020EXA 8020EXA 8020EXA <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 FPA 5030 EPA 5030 EPA 5030 <br />' na yst C Westwater C Westwater C Westwater C Westwater <br /> MS/MSD # <br /> Sample Conc <br /> Prepared Date <br /> Analyzed Date <br /> nstrument I D# <br /> Conc Spiked - <br /> Result <br /> MS %Recovery - - <br /> WDup Result <br /> SD % Recov <br />' RPD - - - - <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> LCS # 4LCS050499 4LCS050499 4LCS050499 4LCS050499 <br /> iPrepared Date 5/4/99 5/4/99 5/4/99 5/4/99 <br /> Analyzed Date 5/5/99 5/5/99 5/5/99 5/5/99 <br /> nstrument I D # HP-5 HP-5 HP-5 HP-5 <br /> Conc Spiked 0 80 mg/Kg 0 80 mg/Kg 0 80 mg/Kg 2 4 mg/Kg <br />' LCS Result 084 085 084 26 <br /> LCS % Recov 105 106 105 108 <br /> 1915/1910 <br /> LCS 50-150 50-150 50-150 50-150 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent4ree matrix that is analyzed using the same reagents, <br /> VEIQIUOIA ANALYTICAL, #1271 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 If <br /> bNea0very of analytes from the matnx spike does not fall within specified control limits due to matrix <br /> Interference,the LCS recove is to be used to validate the batch <br /> a A Brewer "*MS=Matrix Spike,MID=MS Duplicate, RPD=Relative%Difference <br /> Project Manager <br /> 1 9050030 PPP <25> <br />