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• 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 ' <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988 9600 FAX(925)988 4673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos CA 94070 41 1 1 (650)232-9600 FAX(650)232-9612 <br /> Pinnacle Client project Ib 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 /> 8020EXB 8020EXB 8020EXB 8020EXB <br /> Anally Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> AnalystC Westwater C Westwater C Westwater C Westwater <br /> IVIS/MSD # 9050091 9050091 9050091 9050091 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 5/4/99 5/4/99 5/4/99 5/4/99 <br /> Analyzed Date 5/4/99 5/4/99 5/4/99 5/4/99 <br /> Instrument 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 /> Result 097 096 093 28 <br /> MS % Recovery 121 120 116 117 <br /> Dup Result 083 084 083 26 <br /> MSD °� Recov 104 W ' 105 104 108 <br /> RPD 16 13 11 74 <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> } ,, h ..u.v .t 4 • r . � t , s ,.err rr fi, , na o.t ry u <br /> LCS # 5LCS050499 5LCS050499 5LCS050499 5LCS050499 <br /> Prepared Date 5/4/99 5/4/99 5/4/99 5/4/99 <br /> Analyzed Date 5/4/99 5/4/99 5/4/99 5/4/99 <br /> Instrument 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 10 10 10 30 <br /> LCS %Recov 125 125 125 125 <br /> i <br /> LCS 50150 50-150 50-150 50-150 <br /> Control Limits ' <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL, #1271 preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> n fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> overy of analytes from the matrix 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 /> Melissa A Brewer **NIS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Manager <br /> 9050030 PPP <26> <br /> r <br />