Laserfiche WebLink
<br /> <br />ROCKY FLATS SOIL PLUTONiUM79200 SURVEYS FROM 1970 TO 1991 <br />Conclusions <br />' There are several outstanding issues or questions concerning the distribution of plutonium in and <br />around the Rocky Flats Plant. <br />^ What zones in the Rocky Flats area are contaminated? <br />The discussion on page 16 and 17 listed four categories to group data for comparison. <br />Category 1 and category 2 represent two classes or Zones of contamination of special <br />interest. The CDH data could be used to draw two Zones, Zone 1 and Zone 2 <br />representing contaminated areas above the CDH standard and contaminated areas that <br />could be considered borderline, respectively. Even though Sectors 6 and 7 do not have <br />sufficient resolution for extrapolation of data, Sub-sector data for Sectors 1 and 2 could <br />be extended eastward into Sectors 6 and 7. Zone 2 could be considered a buffer area. <br />Map 6 shows the aeeas for Zone 1 and Zone 2. Zone 1 is divided into Sectors 1 and 2 <br />areas identified by the 1989 and 1991 data sets and an area extending into Sector 6 and 7. <br />The Sector 6 and Sector 7 azea in Zone 1 is along the eastern line between the sectors <br />' and the first one-third of the 30 degree arc lines extending from Sectors 1 and 2, north <br />and south, respectively. The rest of sectors 1, 2, 6 and 7 and all of Sector 4 are <br />classified Zone 2. <br />' ^ C:an soil plutonium be predicted by distance and direction from the plant? <br />' 7'he source of the plutonium and the mechanism of deposition, the 903 Pad and wind <br />blown, respectively, are assumed. This makes the data neither random nor independent. <br />' This is typical of most environmental data. Modeling the past event(s) would predict <br />plutonium79+2°0 concentrations at distance and direction from the 903 Pad. The model <br />can be used for source aeeas, like the pad. Meteorology and particle sizes could be taken <br />' into account. This model is presently being considered by the Health Advisory Panel and <br />i1:s contractor for investigation concerning releases of particulate air contaminates at the <br />plant. <br />' ^ Flow do CDH results compare to other researchs? <br />' There is a substantial amount of data, studies and reports from the late 1960s to the <br />present that are consistent with the results of CDH Soil Plutonium Surveys around Rocky <br />Flats. These studies have been sponsored by DOE and others. <br />1 <br />29 <br />1 -..- <br />1 <br />