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&W <br /> Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (510) 988.9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)92 1-0 100 <br /> X- <br /> .......... <br /> "Clenf-Pro-Jectl organ ill .......Sv <br /> .. <br /> 'WE"e6science <br /> 4— -30-A Lindbergh Ave. Matrix: Solid <br /> Livermore, CA 94550 <br /> Attention: Tom Seeliger QC Sample Group: 7021292-301 <br /> Reported: Mar 3, 1997; <br /> -M <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC l3atch#: SP022797 SP022797 SP022797 SP022797 <br /> 8020EXA 8020EXA 8020EM 8020EXA <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: D.Newcomb D.Newcomb D.Newcomb D.Newcomb <br /> MS/MSD#: 7021446 7021446 7021446 7021446 <br /> Sample Cone.: N.D. N.D. N.D. N.D. <br /> Prepared Date: 2/27/97 2/27/97 2/27/97 2/27/97 <br /> LW Analyzed Date: 2/27/97 2/27/97 2/27/97 2/27/97 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 <br /> Conc.Spiked: 0.40 mg/kg 0.40 mg/kg 0.40 mg/kg 1.2 mg/kg <br /> Result: 0,44 0.45 0.44 113 <br /> MS %Recovery: 110 113 110 108 <br /> N*-e Dup. Result: 0.42 0.44 0.43 1.3 <br /> MSD% Recov.: 105 110 108 108 <br /> RPD: 4.7 2.3 2.3 0.0 <br /> RPD Limit: 0-25 0-25 0-25 0-25 <br /> x <br /> a. <br /> ........................... <br /> ............ <br /> ............. X <br /> .... .... ............ ........ ...................... <br /> ............. .................. ...... <br /> ..... ....... <br /> LCS#: 4LCS022797 4LCS022797 4LCS022797 4LCS022797 <br /> Prepared Date: 2/27/97 2/27/97 2/27/97 2/27/97 <br /> LM Analyzed Date; 2/27/97 2/27/97 2/27/97 2/27/97 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 <br /> Cone.Spiked: 20 lig/L 20,vg/L 20,ug/L 60pg/L <br /> LCS Result: 20 21 20 62 <br /> LCS %Recov.: 100 105 100 103 <br /> a. <br /> MS/MSD <br /> LCS 60-140 60-140 60-140 60-140 <br /> LM Control Limits <br /> Please Note: <br /> Ir 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 /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure. H <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 /> J' av MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> P6 ct <br /> o' Manager <br /> LW 7021292.ALT <6> <br />