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~- <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />f <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />Mr. Douglas Lemke <br />Core Labs <br />1300 South Potomac <br />Suite 130 <br />Aurora, Colorado 80012 <br />Dear Mr Lemke: <br />Hay 26, 1988 <br />Lab no. 880133 <br />Enclosed are the x-ray fluorescence (XRF) results for the two samples (your job <br />no. 880336) you submitted last week. <br />A representative portion of each sample was ground to `325 mesh in a steel puck <br />mill, and then analyzed by the standard XRF-powder procedure for 30 major, <br />minor and trace elements. The relative precision/accuracy for this analytical <br />method is `10-15X at levels greater than twice the detection limit in samples <br />of "average" geologic composition. A replicate sample and an internationally <br />recognized standard (SY3, a Canadian standard rock) were analyzed with the <br />samples for quality control. The accepted ("known") values for the standard <br />are listed with the XRF results. <br />Thank you for the opportunity to be of service. <br />Sincerely, <br />Peggy Dalheim <br />~~V <br />g700 V 4~~,yood• ~q32 8708 <br />~p X3031 <br />