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[fJ � <br /> Calculation of RPD <br /> for BP Oil QAIQC Program <br /> BP Oil Station No. 11165 12104!96 Event <br /> Analytical TPH-G Benzene Toluene Ethylbenzene Xylenes MTBE <br /> Data <br /> Primary Sample 24000 590 25 70 ND<25 18000 <br /> QC-1 Duplicate 23000 570 NDQ5 68 NDQ5 21000 <br /> Sample 23500 580 NIA 69 0 19500 <br /> Mean <br /> RPD 4.26% 3.45% NIA NIA NIA -15.38% <br /> Significant NO NO NIA NO NO NO <br /> Result? <br /> Notes: <br /> (1) Significance is defined as an RPD greater than 30%(or less than-30). <br /> (2) "A negative"RPD will result if the value of the Primary Sample Result is smaller than QC-1. <br /> The determination of Significant Result is not affected by sign of RPD. <br /> ti <br /> f Aq p ro4B Po i hR P D-QaQc.W Q2 <br />