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- \ Sequoia 680 Chesapeake Drive Redwood GM CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> Analytical <br /> 1900 Bates Avenue Suite L Concord,CA 94520 (510) 686-9600 FAX(510) 686 9689 <br /> Analytieal 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916) 923 9600 FAX(916) 921 0100 <br /> Mlttelhauser Corporation {W Client Project ID- 2168 01J-001,rUnocal/Tracy <br /> ,7901 Stoneridge Drive, Suite 123 Matrix Solid <br /> ' Pleasanton, CA 94588v M v wv k,v: u +ry <br /> Attention R Marks/ � 502243-01-8 Fte orted Feb 9, 1995 <br /> R Pa Eer Work Order# 9 rsr�ry �wbpm�,v , ,y. <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> ' Benzene <br /> QC Batch#: GCO20695STEXEXC GCO20695BTEX©CC GCO20695BTEXEXC GCO206958TEXEXC <br /> Analy Method: EPA 8024 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> ' Analyst: E Cunanan E Cunanan E Cunanan E Cunanan <br /> MS/MSD #: 95021-19916 9502H9916 95021-19916 95021-19916 <br /> Sample Conc.: N D N D N D N D <br /> 1 Prepared Date: 2/6/95 2/6/95 2/6/95 2/6/95 <br /> Analyzed Date: 2/6/95 2/6/95 2/6/95 2/6/95 <br /> Instrument LD.#: GCHP1 GCHP1 GCHP1 GCHP1 <br /> ' Conc Spiked: 0 20 mg/Kg 0 20 mg/Kg 0 20 mg/Kg 0 60 mg/Kg <br /> Result: 018 019 019 055 <br /> MS % Recovery: 90 95 95 92 <br /> Dup. Result: 018 018 019 055 <br /> MSD % Recov.: 90 90 95 92 <br /> ' RPD: 00 54 00 00 <br /> RPD Limit: 0-50 0-50 0.50 0-50 <br /> br,.b v^'„'"`lN'v' <br /> LCS #: <br /> Prepared Date: <br /> Analyzed Date: <br /> instrument I.D.#: - - <br /> ' Conc Spiked: - - - <br /> LCS Result: - - - <br /> ' LCS% Recov.: - - - <br /> MS/MS <br /> ' LCS <br /> Control Limits 55-145 47-las 47-155 56-140 <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 /> RM caa�— interference,the LCS recovery is to be used to validate the batch <br /> Vickie Tague Clark <br /> Project Manager *"MS=Matnx Spike,MSD=MS Duplicate,RPD-Relative%Difference 9502243 MMM e3> <br />