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Annual Site Environmental Report for 1999
L I, L5,
Table 5.1 Routine Radiological Sampling
Parameters for
Surface Water Surveillance for 1999
Station Parameter Sample Type
L ID,L 11,
L 29, L 30,
L 64, L 306
Dissolved alpha and
beta, suspendedalpha
237 239.
and beta, Np, Pu,
99 235' Grab
Tc; total U, %U,
m 238 230
U, U, Th, gross
gamma
and downstream of plant effluents in Little
Bayou Creek. Comparisons of downstream data
with upstream data and reference waterways can
be made to determine the influence of'- plant
effluents on these waterways.
The downstream Bayou Creek location
shows an increase in. uranium and no change for
99'fc when compared to the upstream Bayou
Creek location. The downstream Little Bayou
Creek locations both show an increase in
uranium and one shows an increase in 99'fc when
compared to the upstream Bayou Creek
location. 239Pu and 231l'fh were found to be
highest in the upstream Ohio River location.
Concentrations of radionuclides found are at
levels far below DCGs and do not pose a health
risk.
L 8, L 12, L 223, and L 241 are nonroutme
sample locations. L 135, L 136, L 137, L 150: L
154, and L 155 are surface water runoff samples
from the C-746-S, T, and U landfills. Data for
these locations is provided in Appendix C.
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Table 5.2 Selected -Routine Radiological Surface Water Surveillance Results
(Average Concentrations)
L 10 Lll L30
L5 Down· Down· L 29 Down· L 306
Ll Down· stream stream Upstream stream L64 Confluence
Upstream stream Little Little Ohio Ohio Massac of Ohio and
Parameter Bayou Bayou Bayou Bayou River River Creek Mississippi
Total
Uranium
(mglL) NO 0.004 0.010 0.005 NO NO NO NO
99 Tc (pCi/L) NO NO NO 10.0 1.92 13.0 NO NO
mNp(pCi/L) 0:213 NO 0.34 ND NO 0.378 0.277 NO
239pU (pCi/L) NO NO ND ND 0.047 NO NO NO
230 Th (pCi/L) 0;034 NO NO NO 0.095 NO NO NO
mU (pCi/L) 0;502
238U (pCi/L) 6;69 --
ND = not detected
--," = not measured
Radiological Environmental Surveillance 5-3