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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Sinker Avenue,Suite 8 Sacramento CA 95834 (916) 911 9600 FAX(916)921 0100 <br /> { <br /> Pacific Environmental Group Client Project ID 920-1191A/9-6171, Stockton <br /> 2025 Gateway Place, Suite 440 Matrix SOLID <br /> San Jose, CA 95110 <br /> Attention Tim Anensen Work Order# 9712E29 01-07 Reported Jan 12, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Diesel <br /> QC Batch#. GC1226970HBPEXA <br /> Anally Method: EPA 8015M <br /> Prep Method' EPA 3550 <br /> Analyst A Porter <br /> MS/MSD# 9712E2901 <br /> Sample Conc 5300 <br /> Prepared Date. 12/26/97 <br /> Analyzed Date: 12/29/97 <br /> Instrument I.D # GCHP5A <br /> Conc. Spiked. 25 mg/Kg <br /> Result: <br /> MS % Recovery: <br /> Dup Result: No MS/MSD due to <br /> MSD % Recov : matrix interference <br /> RPD- <br /> RPD Limit. <br /> LCS # BLK122697 <br /> Prepared Date 11/26/97 <br /> Analyzed Date 12/26/97 <br /> Instrument I D.# GCHP4B <br /> Conc. Spiked, 25 m9/K9 <br /> LCS Result: 22 <br /> LCS %Recov.: 88 <br /> 50.150 <br /> LCS 60.140 <br /> Control Limits <br /> Please Note <br />• The LCS 1s a control sample of known,interferent-tree 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 /> interference,the LCS recovery is to be used to validate the batch <br /> Tod Granicher <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9712E29 PPP <2> <br />