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AMER ICAN <br /> m <br /> \ LABORATORY QA/QC REPORT <br /> aNaLYTICS <br /> Client: Thrifty Oil Company sample Matrix: Water <br /> Method: EPA 8020 (BTEX) , QC, Spike Date Analysed: 6/10/92 <br /> AA Project No. : A135172-1 Date Reported: 6/22/92 <br /> ----------- r .w.r., ----- -.0------------ --~------w------- <br /> Spike <br /> ......---wspike spike/Duplicate <br /> Compounds Recovery Recovery RPD <br /> M ($) (%) <br /> Benzene 134 138 2 .9 <br /> Toluene 139 139 O <br /> Ethyl Benzene 136 140 2 . 9 <br /> Total Xylenes 142 146 2 .8 <br /> Note: Laboratory Control Standard Recoveries were within Control <br /> Limits. <br /> ww <br /> RPD = Relative Percent Diff/tjmerence, 100( (x1 - x2)/{ (x4 + x2)/2 } jw--- <br /> Z� 1.0 .-o z�o,�q, — <br /> Larry L. Schalege , Ph.D. <br /> Laboratory Director <br /> €f/t]m <br /> American Analytics • 9765 Eton Avenue, Chatsworth California 91311 <br /> Tel ( 818 ) 998 - 5547 • ( 800 ) 533 - 8378 • Fax ( 818 ) 998 - 7258 <br />