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MEN <br /> Terminolo <br /> of certain terms used in <br /> In order to prevent misunderstanding <br /> this report, <br /> the ons are offered' <br /> following clarificati <br /> j <br /> The term "feature" is used in reference to a discernable <br /> contour farm rather <br /> pattern �. <br /> 'n the contoured data. It denotes a ' <br /> occurrence. <br /> than a definite or separate chemical <br /> The <br /> tem "occurrence" is used to indicate an area where chem- <br /> to be de- <br /> ical compounds are present in sufficient conce <br /> ntrate t indicative <br /> i <br /> the anal analysis of soil vapors. The term is <br /> tested by y etc) , .and <br /> or, dissolved, <br /> of any specific mode of occurrence (va P <br /> ;s <br /> uggest the presence of "free <br /> does not necessarily <br /> indicate or <br /> s <br /> product" or "phase-separated hydrocarbons". <br /> The term "trace level" representsis <br /> a concentration what the <br /> detectable but is less than the formal detection limit of <br /> analytical statistically <br /> equipment. A <br /> valid quantification of <br /> trace levels is not Possible <br /> The term "analyte" refers to any of the hydrocarbons standard- _ <br /> uantification in the chromatoc;raphic analysis. <br /> ized for q <br /> the unsaturated zone between <br /> The term "vadose zone" represents <br /> nd surface. <br /> the ground water table and the grou <br /> The term "indicates" is used when evi3ence dictates a unions <br /> �� ests" is used when several explanat� <br /> conclusion. The term sug <br /> evidence are possible, but one in particular seems. more <br /> of certain ,� higher degree of <br /> likely. As a result, "indicates" carries a <br /> -- :-- -- ----- esu gists". -- --=---- - --- - <br /> confidence �n a concluszan--than-does__.--- g9 <br /> 3 <br />