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1 c 404 N 680 Chesapeake Wiget Lane Drive Redwood City,CA 94063 (650) 364-9600 FAX(650)364.92&3 <br /> Sequoia Walnut Creek CA 94598 (510) 988.9600 FAX(510)988=9673 <br /> 1 <br /> 819 Striker Avenue,Suite B Sacramento,CA 95834 (916) 921-9600 FAX(916)921.0140 <br /> Analytical <br /> :ATC Client Project ID. 15598, D'Arcy Road Lathrop <br /> 1260 Graphics Drive Matrix: Solid <br /> ,' Modesto CA 95351-1502 <br /> Attention Jeanne Homsey Work Order# 98031-114-01-09, 11 Reported Apr 3, 1998 <br /> ., is <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#: GC03269813TEXEXC GC032698BTEXEXC GC032698BTE)(EXC GC032698STEXEXC GC032698BTEXEXC <br /> ' <br /> Analy. Method: PA 2 EPA 1 <br /> y e hod: EPA solo EPA ao2o EPA solo E eo 0 so 5M <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> �I Analyst: J. Minkel J. Minkel J.Minkel J.Minkel J. Minkel <br /> MS/MSD #: 9803H1407 9803H1407 9803H1407 9803H1407 98031-11407 <br /> Sample Conc.: N.D. N.D. N.D. N.D. N.D. <br /> Prepared Date: 3/26/98 3/26/98 3/26/98 3/26/98 3/26/98 <br /> Analyzed Date: 3/26/98 3/26/98 3/26/98 3/26/98 3/26/98 <br /> Instrument I.D.#: GCHP7 GCHP7 GCHP7 GCHP7 GCHP7 <br /> ' Conc. Spiked: 0.20 mg/Kg 0.20 mg/Kg 0,20 mg/Kg 0.60 mg/Kg 1.2 mg/Kg <br /> Result: 0.12 0.14 0.15 0.46 1.0 <br /> MS % Recovery: 60 70 75 77 83 <br /> 3 <br /> Dup. Result: 0.12 0.15 0.17 0.51 1.0 <br /> MSD %Recov.: 60 75 85 85 83 <br /> RPD: 0.0 6.9 13 10 0.0 <br /> RPD Limit: 0-25 0-25 0-25 0-25 0-25 <br /> LCS #: BLK032698 BLK032698 ELK032698 BLK032698 BLK032698 <br /> Prepared Date: 3/26/98 3/26/98 3/26/98 3/26/98 3/26/98 <br /> Analyzed Date: 3/26/98 3/26/98 3/26/98 3/26/98 3/26/98 <br /> Instrument I.D.#: GCHP22 GCHP22 GCHP22 GCHP22 GCHP22 <br /> ' Conc. Spiked: 0.20 mg/Kg 0.20 mg/Kg 0.20 mg/Kg 0.60 mg/Kg 1.2 mg/Kg <br /> LCS Result: 0.16 0.17 0.20 0.60 1.1 <br /> ' LCS % Recov.: 80 85 100 100 92 <br /> 60-140 60-140 60-140 60-140 60-140 <br /> ' LCS 70-130 70-130 70-130 70-130 70-130 <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 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 /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> 7< <br /> ;Ayvan Kai interference,the LCS recovery is to be used to validate the batch, <br /> i <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate, RPDRelative%Difference 98031-114.W <:3> <br /> �1 <br />