Hydrogeology of the 200 Areas low-level burial grounds: An interim report: Volume 1, Text

Bjornstad, Bruce N.; Bergeron, Marcel P.; Wallace, Douglas W.R.; Newcomer, Darrell R.; Schramke, Janet A.; Chamness,; Cline, C.S.; Airhart, S.P.; Wilbur, J.S.

doi:10.2172/6002814

Cited by 14 publications

(37 citation statements)

References 26 publications

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“…Equivalent to the sandy sequence discussed in Last et al (1989) and Lindsey et al (1992), to the H2 sequence discussed by Lindsey et al (1994) and to Qfs (Quaternary Flood Sanddominated) documented by Reidel and Fecht (1994).…”

Section: Unit H2mentioning

confidence: 66%

“…An upper gravel sequence consisting of highenergy, gravel-dominated facies interbedded with lenticular and discontinuous layers of sand-dominated facies. Equivalent to the upper gravel sequence discussed by Last et al (1989) and Lindsey et al (1992), to the H1 sequence discussed by Lindsey et al (1994) and the Qfg (Quaternary Flood Gravel-dominated) documented by Reidel and Fecht (1994).…”

Section: Geologymentioning

confidence: 74%

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Characterization of Direct-Push Vadose Zone Sediments from the 241-B and 241-BX Tank Farms

Brown¹,

Icenhower²,

Um³

et al. 2007

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Executive SummaryGeochemical tests provide evidence for the transit of a plume of caustic waste solution through the sediment column at the Hanford 241-B and -BX Tank Farms. Direct-push samples recovered from boreholes surrounding Tanks 241-B-110 and 241-BX-102 and related waste transfer lines and diversion boxes included sediments typical of those previously recovered from other localities on the Hanford Site. The Hanford formation sediments are dominantly quartzo-feldspathic sands containing lithic fragments, displaying a range of particle size distributions and sorting characteristics. Some moderately well-sorted, fine-grained lithologies are interpreted as lenticular bodies irregularly dispersed in coarser-grained, more poorly sorted sediments. Tier I tests conducted on the vadose zone sediments revealed an inverse correlation between moisture content and sediment size fraction (i.e., there is greater moisture content in finergrained sediments). The Tier I tests also showed that the pore water solutions were likely sodium-rich, moderately saline, and possessed higher pH values than background (uncontaminated) sediments. These data are characteristic of sediments that have encountered sodium-rich, saline, caustic waste solution, as documented in other reports at other suspect contamination sites around Hanford. Analyses of solutions from 1:1 water extracts reveal relatively balanced cation and anion concentrations, indicating that most of the geochemical species have been accounted for. The water extract data for affected sediments also indicate unusually high concentrations of aluminum, iron, and phosphorus. The relatively high concentrations of aluminum and iron may be the result of dissolution of secondary amorphous phases that precipitated after a reactive plume partially dissolved aluminum-and iron-bearing phases as it migrated through the sediment column. On the other hand, the presence of elevated concentrations of phosphorous may be the tell-tale signature of wastes derived from the bismuth phosphate separation process. Elements typically mobile in the subsurface, such as technetium-99, are present at either low concentrations or are below the analytical detection limit. However, we expect that the mobile elements would be present mainly along a narrow plume front, and if this front had passed deeper into the sediment profile than depths sampled, the retention of these elements would be minor. Alternatively, uranium-238 was detected in nearly all the direct-push sediments (by acid extract experiments) from around the BX Tank Farm at concentrations above the natural crustal average (0.76 pCi/g), and we also detected the presence of several anthropogenic radioisotopes, such as cobalt-60, cesium-137, europium-154, and europium-155 (by gamma energy analysis). These data confirm contamination of the sediments.We selected a pair of lithologies from a single direct-push hole from near BX-102 that we anticipated would reveal details of the mechanism of radionuclide binding in the sediments and subjected them ...

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Section: Unit H2mentioning

confidence: 66%

Section: Geologymentioning

confidence: 74%

Characterization of Direct-Push Vadose Zone Sediments from the 241-B and 241-BX Tank Farms

Brown¹,

Icenhower²,

Um³

et al. 2007

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show abstract

“…A number of reports dealing with the hydrogeology of the 200 Areas have been released including the following: Connelly et al (1992a,b), Jackson (1992), k z a et al (1991), Last et al (1989), Newcomer et al (1992), and Swanson et al (1992).…”

Section: Areas Hydrologymentioning

confidence: 99%

Hanford Site National Environmental Policy Act (NEPA) characterization. Revision 7

Cushing¹

1995

Self Cite

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“…The indicator-parameter evaluation groundwater monitoring program for the 2101-M Pond is described in Chamness et al (1989). The monitoring network consists of one upgradient (299-E18-1) and three downgradient (299-E18-2, 299-E18-3, and 299-E18-4) groundwater monitoring wells installed in the uppermost portion of the unconfined aquifer.…”

Section: Sampling and Analysis Programmentioning

confidence: 99%

Annual report for RCRA groundwater monitoring projects at Hanford Site facilities for 1993

1994

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Hydrogeology of the 200 Areas low-level burial grounds: An interim report: Volume 1, Text

Cited by 14 publications

References 26 publications

Characterization of Direct-Push Vadose Zone Sediments from the 241-B and 241-BX Tank Farms

Characterization of Direct-Push Vadose Zone Sediments from the 241-B and 241-BX Tank Farms

Hanford Site National Environmental Policy Act (NEPA) characterization. Revision 7

Annual report for RCRA groundwater monitoring projects at Hanford Site facilities for 1993

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