areas to be sampled in greater detail or will serve to define areas potentially (see Cleanup ranking below) to be cleaned. If more data is deemed necessary in order to better define cleanup areas, the survey/ sampling process described above wiil be repeated. G. CLEANUP. 1. veyors. The border of areas to be cleaned will be marked by sur- The entire enclosed area will then be devegetated in the manner which causes the least disturbance to underlying soil. will be removed for mulching. Mowed vegetation Easily removable contaminated and noncon- taminated debris will also be taken away (see Part III B Criteria). Large structures and concrete slabs which likely were in place prior to the deposition of any plutonium and which do not interfere with Cleanup will not be removed unless "swipes" show excessive removable plutonium is present. 2. » re | 7 For those Pu-contaminated areas. which have highest concen- trations near the air-ground interface (the majority of the Pu suspect __, | ‘areas), the soil will be removed in thin layers, one layer at a time, tO fie “Oy a depth of at least 15 em. The layers of soil and root mats will be assembled at central collection points, loaded into open bed trucks, Ae * / ae covered and transported to the ultimate disposal site. oe 3. For Pu-contaminated areas which have high Pu concentrations at great depths, soil will be removed in conveniently thick layers until approaching the required excavation limits, then they will be removed in £ KR & HK ite gE £L Fe thin layers as described above.