1 - paducah environmental information center

Paducah Site
Surface runoff from the closed C-746-S
residential landfill and the C-7 46-T inert landfill
is monitored quarterly. Due to their close
proximity, they are monitored as one landfill
(Figure 4.2). Also; surface runoff is monitored
from the C-746-U operating contained landfill.
Surface· runoff from these landfills is monitored
for uranium, gross alpha, and gross beta. Grab
samples are taken from the landfill runoff, the
receiving ditch upstream of the runoff discharge
point, and the receiving ditch downstream of the
runoff discharge point. Sampling is performed·
to comply with KDWM permit requirements for
landfill operations. The landfills will continue to
be monitored for at least 30 years from the date
of closure. Data is presented in Appendix C.
Liquid Effluent Monitoring Results
Tables 4.1 and 4.2 give the yearly
minimum, maximum, and average concentrations
of uranium and '"fc, respectively; at each outfall
monitoring location. Each radionuclide is
compared with the corresponding DCG and is
presented. as a percentage of that standard. The
average concentrations at all outfalls were small
percentages of the corresponding DCGs. Outfall
015 receives runoff from the uranium burial
grounds with small quantities of surface
contamination from uranium compounds. That
runoff is responsible for the elevated 99'J'c and
uranium concentrations associated with Outfall
015. The average concentration of uranium
being discharged to Outfall 015 was 14.7% of
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Paducah Site
Landfill
Surface Water
Locations
• SW Stations
Streams
D LancHillBounclarin
/\/R08 ••
500 500 Feet
P'"""'III
Figure 4.2 Landfill surface water monitoring locations.
4-4
Radiological Effluent Monitoring