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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City,CA 94063 <br /> (415) 364-9600 FAX(415) 364-9233 <br /> OYAtr <br /> R $NA�� ieM ro ect Ib• W0148 Q2, oc onp olice <br /> l1710 Main Street Matrbc: Sol <br /> Escalon, CA 95320 <br /> Attention John Lane OC Sample Group 3KC7901.6 Reported: Dec 6, 1993 <br /> QUALITY CONTROL DATA REPORT <br /> ANAIM Benzene Toluene Rhyl Xylenes Diesel <br /> Benzene <br /> Method: IPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015 <br /> Ane E.Cunanan E.Cunanan E Cunanan E Cunanan 0 Tran <br /> MS/MSD <br /> Batch#: 3KA6516 3KAB516 3KA6516 3KA6516 3KD6401 <br /> Date Prepared: 11/22/93 11/22/93 11/22/93 11/22/93 11/23/93 <br /> Date Analyzed: 11/22/93 11/22/93 11/22/93 11/22/93 11/23/93 <br /> Instrument I.D.#: GCHP-18 GC HP-18 GCHP-18 GCHP 18 GCHP-5 <br /> Cone.Spiked: 020 mg/kg 020 mg/kg 0.20 mg/kg 0 60 mg/kg 15 mg/kg <br /> Matrix Spike <br /> 0 %Recovery: 75 85 8o so 67 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 75 85 so so 8s <br /> Relative% <br /> Difference: 0.0 00 00 00 1 1 <br /> ab'�.H cFNY'4 <br /> LCS Batch#: - - - - SWUM <br /> Date Prepared: - - - - 11/23/93 <br /> Date Analyzed: - - - - 11/23/93 <br /> Instrument I.D.#: - - - - GCHP-6 <br /> LCS% <br /> Recovery: - - - - 96 <br /> Recovery <br /> Control Limits: 55-145 47-149 47-155 56-140 38-122 <br /> Please Nate <br /> The LCS is 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 gxlw is an aliquot of sample <br /> of with known quantities of specffic compounds and subjected to the entire analytical procedure 8 <br /> li � recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> �� II ll o -� Interference,the LCS recovery Is to he used to validate the batch <br /> Vickie Tag <br /> Project Manager 3KC7901 WAT i3> <br />