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Paducah Site Sediment Sediment is an important constituent of the aquatic environment. If a pollutant is a suspended solid or is attached to suspended sediment; it can settle to the bottom (thus creating the need for sediment sampling), be taken up by certain organisms, or become attached to plant surfaces. Pollutants in solution can adsorb on suspended organic and inorganic solids or be assimilated by plants and animals. Suspended solids, dead biota, and excreta settle to the bottom and become part of the organic substrata that support the bottom-dwelling community of organisms. Sediments play a significant role in aquatic ecology by serving as a repository for radioactive or chemical substances that pass via bottom-feeding biota to the higher trophic levels. Figure 5.2 shows possible exposure routes of trace metals (including uranium) in an aquatic ecosystem. Sediment Surveillance Program I. IWlARDOO o 310.1 I SEDIMENTSAMPUNG o 2 MILES POINT (SS) Figure 5.3 Routine sediment sampling locations. Sediment samples were taken from six locations (Figure 5.3). Table 5.3 shows the radiological analytical parameters. As a result of DOE's retaining responsibility for historic <strong>environmental</strong> issues and problems, ditch sediments are sampled annually through a radiological <strong>environmental</strong> surveillance program. Water Dissolved Solids a 1 ~i g .. !l '" .5 If ~ g~J .l! '" '" .~ .2 I H~ ~ , !!5 J .. j .. ..§ . " 1 ... s .g ! = .~ l! 8 ] "? i ." ~ .. l:- f Colloidal Suspended ~ Suspension Sediments ·8 = c ~ ~ j = ~ ~ Jl '" ] .l! l ~ Bottom Sediment Figure 5.2 Routes of trace metals In an aquatic ecosystem (Jinks and Eisenbud 1972). Sediment Surveillance Results Table 5.4 shows the radionuclide sediment sampling results for 1999. Locations SS 1, SS 2, and SS 27 are downstream of plant effluents. Locations SS 20, SS 21, and SS 28 are considered reference, or background sites, and can be used to compare with downstream data. SS 20 and SS 21 are on different creeks upstream of the plant Table 5.3 Radiological Sampling Parameters for Sediment Surveillance at the Paducah Site for 1999 Station SS 1, SS 2, SS 20, SS 21, SS 27, SS28 Parameter m cs , 4°K, 237Np, 239 pU , 99 Tc , 23~h, total U, 234V, 235 U , 2J8U, 60Co, l.IAm, alpha activity, beta activity 5-4 Radiological Environmental Surveillance
:D III a. o· 0 CO o· !!!. m :::J < "'. 0 :::J 3 CD :::J Table 5.4 Routine Radionuclide Sediment Sampling Results at the Paducah Site for 1999 Parameter pCi/g niglkg alpha beta . total ~ wrc l!rNP 2!9pu BTh l'.I7Cs 40K SlCo JllAm 234U mU mu %mu en activit U c: Bat:kgroum/ Locations < ~ iii" :::J (") CD Bayou Creek SS20 NO ND NO NO NO 0.961 NO NO 2.13 1.02 0.23 0.257 0.012 0.699 NO Little Bayou Creek SS21 NO NO NO NO NO 4.16 NO NO 3.78 2.82 0.17 0.247 0.009 0.574 NO Massac Creek SS28 NO NO NO NO NO 0.367 NO NO 0.83 0.89 0.06 0.07 0~003 0.693 NO Dowllstream Locariolls . Bayou Creek SSt NOb ND" NO" ND" 0.030" 1.61? NO" ND" 4.? 3.22a 0.54- 0.854a 0.030" 0.543 a NO" Little Bayou Creek SS2 I7 .85 e NO NO 0.247 NO 1.5 NO NO 6.51 9.58 0.65 4.66 0.069 0.231 NO SS27 4.oo5 a NO 0.090 1.08 0.044 NO NO NO IO.oS 7.29 1.59 3.34 0.096 0.444 NO a average of two samples reported b average of four samples reported e average of two samples reported, one detected result and one at detection level iiI :D CD ", -t, "0 0 ::l. 0' .... 01 co cJ, » :::J :::J c: !!!. en ~. m :::J < ~f :::J 3 CD :::J co co ,', .. - .~ ... , ';'1":;\ .-, , .•
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Units of Radiation Measure Current
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Paducah; Site Contents Figures ....
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Paducah Site Figures Figure Page 1.
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Paducah Site Table Page 9.5 Summary
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Paducah· Site DNAPL DNFSB DOE DOJ
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Paducah Site mgd mg/d mg/L Min ml m
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Paducah Site TSCA TUa TUc Toxic Sub
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Paducah Site xiv
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Paducah Site environment, and the P
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Paducah Site I' Figure 1.2 The Padu
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Paducah Site Upland mixed hardwoods
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Direct Gamma Radiation (TLD) Data A
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Conversions Multiply by to obtain M
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