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SMITH— EMERY COMPANY <br /> c <br /> The Rill Service Independent Tcgjn%� Ltthtrratorit &4ahlaahed 1904 <br /> 781 East Washington Boulevard • Los Angeles Cahfornia90021 • (213)749 3411 • Fax (213)74!-7228 <br /> P b Box 880550 Hunter s Point Shipvard Bldg 114 • San Francisco California 94188 • (415)330 3000 • Fax (415)330-3030 <br /> 5427 East La Palma Avenue • Anaheim Califurma92807 • (714)693 1026 s Fax (714)693 1034 <br /> September 27, 1994 <br /> Quality Control. Report <br /> Matrix Spike and Duplicate Spike <br /> Client Thrifty Oil <br /> File No 72539 <br /> Report No 42521818 <br /> Matrix Water <br /> Method EPA 602/8015 <br /> Lab No 4252113502 <br /> Batch No 4256602/8015-1 <br /> Date Analyzed 09/13/94 <br /> SPIKE <br /> SAMPLE AMOUNT AMOUNT RECOVERY <br /> RESULTS SPIKED RECOVERED ACCEPTANCE <br /> PARAMETER (U&/l) . (Up-Zl)- cul:/1) Y REG RANGEM R P D <br /> Benzene (S) ND 60 54 91 <br /> Benzene (DS) ND 60 46 78 63-137 16% <br /> Toluene (S) ND 60 54 90 <br /> Toluene (DS) ND 60 46 77 65-142 16% <br /> Ethyl Benzene (S) ND 60 55 92 <br /> Ethyl Benzene (DS) ND 60 47 78 56-141 16% <br /> Xylene (S) ND 180 172 95 <br /> Xylene (DS) ND 180 145 81 55-143 17% <br /> S — Spike <br /> DS — Duplicate Spike <br /> R P D — Relative Percent Difference <br /> ND 4 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 1S RESERVED PENDING OUR WRITTEN APPROVAL AS A MUTUAL PROTECTION TO CLIENTS THE PU13LIC AND OURSELVES <br />