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AMERICAN <br /> ti <br /> LABORATORY OAZQC REPORT <br /> ANALYTICS <br /> Client: Thrifty Oil Company Sample Matrix: Water <br /> Method: EPA 8020 (BTEX) , QC, Spike Date Analyzed: 8/12/92 <br /> AA Project No. : A135172-2 Date Reported: 8/17/92 <br /> ....-..�..� <br /> ----------..-.,.._- .-...�..--. ....--......�. -------- -------~------- <br /> Spike Spike/Duplicate <br /> Compounds Recovery Recovery RPD <br /> (%) (t) M <br /> Benzene 82 96 15, 7 <br /> Toluene 43 59 31. 4 <br /> Ethyl Benzene 17 24 34 <br /> Total Xylenes 103 110 6. 6 <br /> y ~ <br /> RPD = Relative Percent Difference, 100( (x I - x2)/( (x, + x2)/2 ) ]~~�~�~` <br /> Note: Quality Control Standard is within the Laboratory control limits <br /> Larry L. Schalege Ph.D. <br /> Laboratory Director <br /> ff <br /> American Analytics • 9765 Eton Avenue, Chatsworth, California 91311 <br /> Tel ( 818 ) 998 - 5547 9 ( 800 ) 533 - 8378 0 Fnx ( R4AN000 71) ro <br />