TRANSURANIUM ELEMENTS AROUND THE ROCKY FLATS PLANT page 3 from the Plant boundary. About 1.9 Ci are spread at distances far from the Plant at levels equal to or below fallout of 0.0015 mCi/m2 (1.5 mCi/km2). Of the total 8.6 Ci included on-site, the HASL data indicate that about 1.7 Ci are included in the area that was covered with asphalt. Analyses for plutonium and americium in 175 soil samples collected on private and municipal lands around the Rocky Flats Plant have not revealed concentrations greater than the EPA Proposed Screening Level. Evaluation of analyses of 27 soil samples, collected for purposes of certain land litigation indicates that soil on private land east of the Plant contains levels less than 50% of the screening level. One sample from 14 collected on City of Broomfield land west of Great Western Reservoir contains 118 mCi/km2 plutonium, which is 59% of the screening level, but adjacent samples indicate less than 50 mCi/km2. The HASL data indicate plutonium levels in the range between 50 and 500 mCi/km2 for the soil in the area near the Plant's eastern boundary. Access to this area is not open to the general public and is controlled by a barbed wire fence and locked gates. Analyses of soil samples by Rockwell at 7 sites in this area confirm the HASL measurements which indicate the presence of plu- tonium greater than the EPA screening level. The plutonium concentrations in the soil from one 10 acre site are in the range from 80 to 252 mCi/km2 with a median of 108 mCi/km2. The median values for the other sites fall within the range from 3 to 34 mCi/km2. On the basis of the EPA Guidance Technical Assessment, the above-mentioned evaluation of additional soil data and airborne plutonium concentration data, there will be no impact on current operations at Rocky Flats if the Proposed Guidance is finalized. There is no need (based on EPA criteria) for decontamination of onsite lands other than those actions currently planned for other reasons. If the EPA guidance were ever to apply to onsite property then the cost could be substantial if removal were required.