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SMITH -EMERY COMPANY <br /> Thi Full Srr7,tc r Ind(pt ndritl Ti NImr l.rrhorrrtnry l-Shrhllshrd 7904 <br /> 781 Fast Washington Boulevard • Los Angcic5 California 90021 • (213)749 3.411 • Fax (213)746 7228 <br /> P0 Eaux 81105;0 F1untEr-,Point Shipyard Bldg 114 • San f ranci-Lo California 94188 • (415)330 3000 • Fax (415)822 5864 <br /> T 5427Ea%i La Palma Avenue • Anaheim California 92807 • (714)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 3349602/8015-1 <br /> Date Analyzed 12/15/93 <br /> SPIKE <br />. SAMPLE AMOUNT AMOUNT RECOVERY <br /> RESULTS SPIKED RECOVERED ACCEPTANCE <br /> PARAMETER (ug/1) (ugZ_1) (urs/1) % REC RANGE X R P D <br /> Benzene (S) ND 22 7 23 0 101 <br /> Benzene (DS) ND 22 7 22 0 97 77-120 4% <br /> Toluene (S) ND 22 7 24 8 109 <br /> Toluene (DS) ND 22 7 22 4 99 75-115 10% <br /> Ethyl Benzene (S) ND 22 7 25 0 110 <br /> Ethyl Benzene (DS) ND 22 7 21 5 95 60-130 15% <br /> Xylene (S) ND 68 1 76 0 112 <br /> Xylene (DS) ND 68 1 66 0 97 50-130 14% <br /> S Spike <br /> DS Duplicate Spike <br /> R P D R 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 OURwRITTEN APPROVAL AS A MUTUAL PROTECTION TO CLIENTS THE PUBLIC AND OURSELVES <br />