Reference, Questions and Help > Lessons Learned
how hot is clean?
SloGlo:
--- Quote from: MrHazmat on May 10, 2005, 04:22 ---Hey DOT say's 22 dpm/cm2 Alpha , 220 dpm/cm2 Beta-Gamma , and 0.5 mRem/hr is clean :D
--- End quote ---
dis iz what dot is sayeen these daze? i thought it wazant crapped up until it waze, like, 22k or so, betagamma external to da package?
atomicarcheologist:
This is beginning to sound like our conversation last weekend, albeit a whole lot more sober.
If you are allowed to leave 25 mr/yr, isn't that a lot more than 15Kdpm/100cm2 max per meter?
Is imbedded piping involved? Or is that a separate issue, ala groundwater/soil limits?
Llama:
Most LTPs are written using the 25 mr/yr criterion. A Resrad is run using the resident farmer senerio to give you the DCGLs for the 25 mr/yr and then you are finished. Wrong! The state EPA and DEP looks at that and makes their determination. Some give and take goes on (mostly give) and a final criteria is decided on. Some states are going to a 10 mr/yr criteria and in some instances materials must meet a 1 mr/yr.
alphadude:
back to the original question-are u looking for signs of pollution? or looking for some thumb rule to make things work? pollution free or "clean" is "no detect." and even thats based on methods used... (LLD, MDC etc)
all these numbers we see here, 5k 15k, 1mr/yr, dot limits, etc. are risk based limits. analytically thats not "clean." they may be acceptable which is different animal all together
MrHazmat:
--- Quote from: SloGlo on May 10, 2005, 06:13 ---dis iz what dot is sayeen these daze? i thought it wazant crapped up until it waze, like, 22k or so, betagamma external to da package?
--- End quote ---
The limits I posted are in cm2 not 100cm2, so actually it's 22000 and 2200 dpm/100cm2
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