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AIpha Enlalyytiral Laboratories Inc . 860 Waugh Lane, H-1, Ukiah, California 95482 <br />' (707) 468-0401 <br /> October 20, 1993 <br /> Geological Audit Services <br /> 1803 W. March Lane, Suite A <br />' Stockton, CA 95207 <br /> Attn: Bob Marty <br /> rSubject: Quality Control Report - 93-1006-012 <br /> C SET - CWH 12114 <br /> MATRIX SOIL <br />' Method Matrix Duplicate <br /> Blank Spike Spike <br /> Recovery Recovery _Recovery RPD <br /> % % % % <br /> Gasoline ND 74 . 8 66. 7 11 <br />' Benzene ND 64 . 5 62 . 9 2 . 5 <br /> Toluene ND 71. 9 69 . 8 3 . 0 <br /> Ethylbenzene ND 67 . 2 64 . 8 3 . 6 <br /> Xylenes ND 71. 7 66. 2 3 . 3 <br />' C SET MJS 4Z600 <br /> EPA 8010 <br />' Bromomethane ND 111 104 6. 3 <br /> Methylene ND 98 98 0. 8 <br /> Chloride <br /> Trans-1, 2-DCE ND 114 114 - <br /> Chloroform ND 122 119 2 . 5 <br /> 1 <br />