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SMITH-EMERY COMPANY <br /> Th( fIrl? S('rr'r(('lndlIr(nd(rrt I(sfrng I-Abrralorll f ,fablNhed 19()4 <br /> 781 East Washington Boulevard • Los Angeles California 90021 • (213)749 3411 • Fax (213)74(x7228 <br /> P 0 Box 880550 Hunter s fain(Shipyard Bldg 114 • San Francisco California 94188 • (415)330 3000 • Fax (415)822 5864 <br /> ` 5427 East La Palma Avenue • Anaheim Califomia 92807 • (734)693 1026 • Fax (714)693 1034 <br /> December 28 , 1993 <br /> Quality Control Report , <br /> Matrix' Spike and Duplicate Spike <br /> Client Thrifty Oil <br /> File No 72539 <br /> Report No 33491331 <br /> Matrix Water <br /> Method EPA 602/8015 <br /> Lab No 3348083104 <br /> Batch No 3351602/8015-1 <br /> Date Analyzed 12/17/93 <br /> SPIKE <br /> SAMPLE AMOUNT AMOUNT RECOVERY <br /> RESULTS SPIKED RECOVERED ACCEPTANCE <br /> PARAMETER (up/1)- (ug/1) �ug/l % REC RANGE() R P D <br /> Benzene (S) ND 22 7 24 8 109 <br /> Benzene (DS) ND 22 7 24.0 106 77-120 3% <br /> Toluene (S) ND 22 7 25 1 110 <br /> Toluene (DS) ND 22 7 25 3 ill 75-115 1% <br /> Ethyl Benzene (S) ND 22 7 27 5 121 <br /> Ethyl Benzene (DS) ND 22 7 26 8 118 60-130 3% <br /> Xylene (S) ND 68 1 84 2 123 <br /> Xylene (DS) ND 68 1 81 8 120 50-130 3% <br /> S m Spike <br /> DS — Duplicate Spike <br /> R P D — Relative Percent Difference <br /> ND — None Detected <br /> ALL.REPORTS ARE SUBMITTED AS THE CONFIDENTIAL PROPERTY OF CLIENTS AUTHORIZATION FOR PUBLICATION OF OUR REPORT CONCLUSIONS OR EX <br /> TRACTS FROM OR REGARDING THEM IS RESERVED PENDING OUR WRITTEN APPROVAL ASA MUTUAL PROTECTION TO CLIENTS THE PU6LVC AND OURSEVVES <br />