Renhack is right, 5,000 and 15,000 for Uranium at DOE facilities,However if this is not good then Alpha dude is right also, It is mainly what you can convince the regulator what is right. Renhack and I are working at a facility where they started out with the DOE limit, However they have changed readings above 2 meters to be more than DOE limits. But DOE has bought off on it. So therefore it is cool and clean with over 100K at above 2 meters for spots. Below is the official DOE word!!! But as I have seen it can be changed.
APPENDIX D TO PART 835—SURFACE
CONTAMINATION VALUES
The data presented in appendix D are to be
used in identifying the need for posting of
contamination and high contamination areas
in accordance with § 835.603(e) and (f) and
identifying the need for surface contamination
monitoring and control in accordance
with §§ 835.1101 and 835.1102.
SURFACE CONTAMINATION VALUES 1 IN DPM/100 CM 2
Radionuclide Removable 2 4
Total (Fixed +
Removable) 2,
3
U-nat, U-235, U-238, and associated decay products ............................. ............................1 ,000 5,000
Transuranics, Ra-226, Ra-228, Th-230, Th-228, Pa-231, Ac-227, I-125, I-129 .......................... 20 500
Th-nat, Th-232, Sr-90, Ra-223, Ra-224, U-232, I-126, I-131, I-133 ............................. ............... 200 1,000
Beta-gamma emitters (nuclides with decay modes other than alpha emission or spontaneous
fission) except Sr-90 and others noted above 5 ............................. ............................. .............. 1,000 5,000
Tritium and tritiated compounds 6 ............................. ............................. ............................. .......... 10,000 N/A
1 The values in this appendix, with the exception noted in footnote 5, apply to radioactive contamination deposited on, but not
incorporated into the interior or matrix of, the contaminated item. Where surface contamination by both alpha-and beta-gammaemitting
nuclides exists, the limits established for alpha-and beta-gamma-emitting nuclides apply independently.
2 As used in this table, dpm (disintegrations per minute) means the rate of emission by radioactive material as determined by
correcting the counts per minute observed by an appropriate detector for background, efficiency, and geometric factors associated
with the instrumentation.
3 The levels may be averaged over one square meter provided the maximum surface activity in any area of 100 cm 2 is less
than three times the value specified. For purposes of averaging, any square meter of surface shall be considered to be above
the surface contamination value if: (1) From measurements of a representative number of sections it is determined that the average
contamination level exceeds the applicable value; or (2) it is determined that the sum of the activity of all isolated spots or
particles in any 100 cm 2 area exceeds three times the applicable value.