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AMERICAN <br /> LABORATORY OC/QA REPORT <br /> AlJALYTICS <br /> Client: Thrifty oil Co. Sample Matrix: Water <br /> Method: EPA 8015M (Gasoline) , QC, Spike Date Analyzed: 6/10/92 <br /> AA Project No. : A135172-1 Date Reported: 6/22/92 <br /> Spike Spike/Duplicate <br /> Recovery Recovery RPD <br /> 89 95 6. 5 <br /> V <br /> RPD = Relative Percent Diff/tjmerence, 100 [ (x, - x2)/{ (XI + x2)/2 ) ]HH~~ <br /> Larry L. Schaleg , Ph.D. <br /> Laboratory Director <br /> . ff/tem <br /> American Analytics • 9765 Eton Avenue, Chatsworth Callfornla 91311 <br /> Tel ( 818 ) 998 - 5547 • ( 800 ) 533 - 8378 • Fox ( 818 ) 998 - 7258 <br />