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<br />ROCKY FLATS SOIL PLUTONNM""=a0 SURVEYS FROM 1970 TO 1991 <br />t Graph 3 is a Box plot showing descriptive statistics for all sectors for the years 1975 through <br />1991. <br />TFiis plot was selected to isolate any changes by excluding pre-1975 data. There are <br />some differences. Sector 1 no longer has any overlap with Sector 2. Only one <br />' measurement, 1977, is above the standard for Sector 1. The mean and median are <br />significantly lower, although the mean is still significantly higher than the median. Sector <br />2 :still is well above all other sectors and the state standard, but the mean and median are <br />significantly lower. <br /> <br /> <br /> <br /> <br />I~ <br />U <br /> <br />i <br />1 <br /> <br />1 <br /> <br /> CDH SOIL PLUTONIUM SURVEY <br /> PLUTONIUM 239+240, 1975-1991 <br /> <br />a.s <br /> .:~ <br /> <br />a <br />3.5 <br /> x <br /> <br /> i~ . <br />3 <br /> <br /> <br />2 <br />5 ta.: <br />y <br />'~° <br />. <br /> ,~,,,~,..., <br />Maximum I Minimum C:':3'.1 75TH PERCENTIL <br />TT .~.~.,~. <br />C 4:'G.'.d ]STM PERCENTILE <br />2 X STANDAiED 09 pCi/GRMIM ~~ Gaometrc mean <br />Mean; n ® Madwn I <br /> <br /> <br />1.5 <br /> <br /> <br />0.5 sir <br /> . <br /> <br />. <br />'s. ~ o.x7m o. <br /> ~~ ~tsoo o.tsao 0 otsoo <br />0 <br /> 1 2 3 4 5 6 7 8 9 10 11 12 13 <br /> SECTORS <br />Graph :i <br />13 <br />1 T .:.:.:.....:..:.:...::.:.........:...:...................:..:.::.:.........:..:::::............:.:::..:..........:.::..:....::.............::..::.:.:...:.......:..::.:.......::..::::... <br /> <br />