George Last

Pacific Northwest National Laboratory
PO Box 999
Richland, WA 99352
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Biography

Mr. Last has over 29 years of experience in applied geology and hydrogeologic research, project management, and line management. Mr. Last managed the Site Characterization Group at PNNL from September, 1988 to April, 1993. He has managed several CERCLA and RCRA related projects for the Department of Energy (and its contractors), the Bonneville Power Administration, the U.S. Army, U.S. Air Force, and the private sector. He has participated in a broad range of geologic studies supporting facility siting, hazardous waste site investigations, vadose zone research, and groundwater hydrology. His experience includes project scoping and management, drilling and sampling, geophysics, geologic mapping, field and laboratory experimentation, and data analysis.

Research Interests

Geologic Controls on Contaminant Transport
Hydrogeology
Quaternary Geology
Site Characterization Technology
Site Remediation Technology

Education and Credentials

M.S.. Environmental Sciences (Hydrogeology Option), Washington State University, 1997
B.S., Geology, Washington State University, 1976

Affiliations and Professional Service

Awards and Recognitions

U.S. Patent No. 6,416,250. "Methods and Apparatuses for Reagent Delivery, Reactive Barrier Formation, and Pest Control" TJ Gilmore, DI Kaplan, and GV Last. 2002.
U.S. Patent No. 6,547,004 B2. "Method and Apparatus for Sampling Low-Yield Wells" GV Last and DC Lanigan. April 15, 2003.

PNNL Publications

2009

Um W, RJ Serne, GV Last, RE Clayton, and ET Glossbrenner. 2009. "The effect of gravel size fraction on the distribution coefficients of selected radionuclides." Journal of Contaminant Hydrology 107(1-2):82-90. doi:10.1016/j.jconhyd.2009.04.003
Last GV, ML Rockhold, CJ Murray, and KJ Cantrell. 2009. Selection and Traceability of Parameters To Support Hanford-Specific RESRAD Analyses -- Fiscal Year 2008 Status Report . PNNL-18564, Pacific Northwest National Laboratory, Richland, WA.

2008

Winsor K, and GV Last. 2008. "Stratigraphic Control on CCl4 and CHCl3 Concentrations in the 200 West Area, Hanford Site." Journal of Undergraduate Research VIII:144-149.
Oostrom M, PD Thorne, ZF Zhang, GV Last, and MJ Truex. 2008. Modeling of Carbon Tetrachloride Flow and Transport in the Subsurface of the 200 West Disposal Sites: Large-Scale Model Configuration and Prediction of Future Carbon Tetrachloride Distribution Beneath the 216-Z-9 Disposal Site. PNNL-17181, Pacific Northwest National Laboratory, Richland, WA.
Serne RJ, BN Bjornstad, DC Lanigan, GW Gee, CW Lindenmeier, RE Clayton, VL Legore, MJ O'Hara, CF Brown, GV Last, IV Kutnyakov, DS Burke, TC Wilson, and BA Williams. 2008. Characterization of Vadose Zone Sediment: Borehole 299-W23-19 [SX-115] in the S-SX Waste Management Area. PNNL-13757-2 Rev. 1, Pacific Northwest National Laboratory, Richland, WA.
Serne RJ, BN Bjornstad, HT Schaef, BA Williams, DC Lanigan, DG Horton, RE Clayton, AV Mitroshkov, VL Legore, MJ O'Hara, CF Brown, KE Parker, IV Kutnyakov, JN Serne, GV Last, SC Smith, CW Lindenmeier, JM Zachara, and DS Burke. 2008. Characterization of Vadose Zone Sediment: Uncontaminated RCRA Borehole Core Samples and Composite Samples. PNNL-13757-1 Rev. 1, Pacific Northwest National Laboratory, Richland, WA.
Serne RJ, GV Last, GW Gee, HT Schaef, DC Lanigan, CW Lindenmeier, MJ Lindberg, RE Clayton, VL Legore, RD Orr, IV Kutnyakov, SR Baum, KN Geiszler, CF Brown, MM Valenta, and TS Vickerman. 2008. Characterization of Vadose Zone Sediment: Borehole 299-E33-45 Near BX-102 in the B-BX-BY Waste Management Area. PNNL-14083 Rev. 1, Pacific Northwest National Laboratory, Richland, WA.
Serne RJ, GV Last, HT Schaef, DC Lanigan, CW Lindenmeier, CC Ainsworth, RE Clayton, VL Legore, MJ O'Hara, CF Brown, RD Orr, IV Kutnyakov, TC Wilson, KB Wagnon, BA Williams, and DS Burke. 2008. Characterization of Vadose Zone Sediment: Borehole 41-09-39 in the S-SX Waste Management Area . PNNL-13757-3 Rev. 1, Pacific Northwest National Laboratory, Richland, WA.
Serne RJ, GV Last, HT Schaef, DC Lanigan, CW Lindenmeier, CC Ainsworth, RE Clayton, VL Legore, MJ O'Hara, CF Brown, RD Orr, IV Kutnyakov, TC Wilson, KB Wagnon, BA Williams, and DS Burke. 2008. Characterization of Vadose Zone Sediment: Slant Borehole SX-108 in the S-SX Waste Management Area . PNNL 13757-4 Rev. 1, Pacific Northwest National Laboratory, Richland, WA.

2007

Duncan JP, KW Burk, MA Chamness, RA Fowler, BG Fritz, PL Hendrickson, EP Kennedy, GV Last, TM Poston, MR Sackschewsky, MJ Scott, SF Snyder, MD Sweeney, and PD Thorne. 2007. Hanford Site National Environmental Policy Act (NEPA) Characterization . PNNL-6415 Rev 18, Pacific Northwest National Laboratory, Richland, WA.
Last GV, CJ Murray, DA Bush, EC Sullivan, ML Rockhold, RD Mackley, and BN Bjornstad. 2007. "Standardization of Borehole Data to Support Vadose Zone Flow and Transport Modeling." Vadose Zone Journal 6(4):906-912. doi:10.2136/vzj2006.0175
Oostrom M, ML Rockhold, PD Thorne, MJ Truex, GV Last, and VJ Rohay. 2007. "Carbon Tetrachloride Flow and Transport in the Subsurface of the 216-Z-9 Trench at the Hanford Site." Vadose Zone Journal 6(4):971-984. doi:10.2136/vzj2006.0166
Um W, RJ Serne, CF Brown, and GV Last. 2007. "U(VI) Adsorption on Aquifer Sediments at the Hanford Site." Journal of Contaminant Hydrology 93(1-4):255-269.

2006

Last GV, WE Nichols, and CT Kincaid. 2006. Geographic and Operational Site Parameters List (GOSPL) for Hanford Assessments. PNNL-14725 Rev. 1, Pacific Northwest National Laboratory, Richland, WA.
Last GV, RD Mackley, and DC Lanigan. 2006. Borehole Geologic Data for the 216-Z Crib Facilities, A Status of Data Assembled through the Hanford Borehole Geologic Information System (HBGIS). PNNL-16103 Rev. 0, Pacific Northwest National Laboratory, Richland, WA.
Last GV, EJ Freeman, KJ Cantrell, MJ Fayer, GW Gee, WE Nichols, BN Bjornstad, and DG Horton. 2006. Vadose Zone Hydrogeology Data Package for Hanford Assessments . PNNL-14702 Rev. 1, Pacific Northwest National Laboratory, Richland, WA.
Oostrom M, ML Rockhold, PD Thorne, GV Last, and MJ Truex. 2006. Carbon Tetrachloride Flow and Transport in the Subsurface of the 216-Z-18 Crib and 216-Z-1A Tile Field at the Hanford Site: Multifluid Flow Simulations and Conceptual Model Update. PNNL-16198, Pacific Northwest National Laboratory, Richland, WA.

2005

Horton DG, GV Last, TJ Gilmore, BN Bjornstad, and RD Mackley. 2005. A Catalog of Geologic Data for the Hanford Site. PNNL-13653 Rev. 2, Pacific Northwest National Laboratory, Richland, WA.
Last GV, RD Mackley, and RR Saripalli. 2005. Hanford Borehole Geologic Information System (HBGIS). PNNL-15362, Pacific Northwest National Laboratory, Richland, WA.
Murray CJ, GV Last, and MJ Truex. 2005. Review of Geophysical Techniques to Define the Spatial Distribution of Subsurface Properties or Contaminants. PNNL-15305, Pacific Northwest National Laboratory, Richland, WA.
Neitzel DA, AL Bunn, SD Cannon, JP Duncan, RA Fowler, BG Fritz, DW Harvey, PL Hendrickson, DJ Hoitink, DG Horton, GV Last, TM Poston, EL Prendergast-Kennedy, SP Reidel, AC Rohay, MR Sackschewsky, MJ Scott, and PD Thorne. 2005. Hanford Site National Environmental Policy Act (NEPA) Characterization Report, Revision 17. PNNL-6415 Rev. 17, Pacific Northwest National Laboratory, Richland, WA.
Nichols WE, GV Last, and CT Kincaid. 2005. "Vadose Zone Modeling of Dispersed Waste Sites in the Framework of an Integrated Stochastic Environmental Transport and Impacts Assessment Code for the Hanford Site." Stochastic Environmental Research and Risk Assessment 19(1):24-32. doi:10.1007/s00477-004-0201-9

2004

Last GV, VJ Rohay, FJ Schelling, AL Bunn, MA Delamare, RL Dirkes, RD Hildebrand, JG Morse, BA Napier, RG Riley, L Soler, and PD Thorne. 2004. "A Comprehensive and Systematic Approach to Developing and Documenting Conceptual Models of Contaminant Release and Migration at the Hanford Site." Stochastic Environmental Research and Risk Assessment 18(2):109-116.
Last GV, WE Nichols, and CT Kincaid. 2004. Geographic and Operational Site Parameters List (GOSPL) for the 2004 Composite Analysis . PNNL-14725 Rev 0, Pacific Northwest National Laboratory, Richland, WA.
Last GV, EJ Freeman, KJ Cantrell, MJ Fayer, GW Gee, WE Nichols, BN Bjornstad, and DG Horton. 2004. Vadose Zone Hydrogeology Data Package for the 2004 Composite Analysis. PNNL-14702 Rev. 0, Pacific Northwest National Laboratory, Richland, WA.
Neitzel DA, AL Bunn, SD Cannon, JP Duncan, RA Fowler, BG Fritz, DW Harvey, PL Hendrickson, DJ Hoitink, DG Horton, GV Last, TM Poston, EL Prendergast-Kennedy, SP Reidel, AC Rohay, MJ Scott, and PD Thorne. 2004. Hanford Site National Environmental Policy Act (NEPA) Characterization Report. PNNL-6415 Rev. 16, Pacific Northwest National Laboratory, Richland, WA.
Oostrom M, ML Rockhold, PD Thorne, GV Last, and MJ Truex. 2004. Three-Dimensional Modeling of DNAPL in the Subsurface of the 216-Z-9 Trench at the Hanford Site . PNNL-14895, Pacific Northwest National Laboratory, Richland, WA.

2003

Cantrell KJ, RJ Serne, and GV Last. 2003. Hanford Contaminant Distribution Coefficient Database and Users Guide . PNNL-13895 Rev. 1, Pacific Northwest National Laboratory, Richland, WA.
Neitzel DA, AL Bunn, KW Burk, SD Cannon, JP Duncan, RA Fowler, BG Fritz, DW Harvey, PL Hendrickson, DG Horton, GV Last, TM Poston, EL Prendergast-Kennedy, SP Reidel, MJ Scott, PD Thorne, and DM Woody. 2003. Hanford Site National Environmental Policy Act (NEPA) Characterization, Revision 15. PNNL-6415 Rev. 15, Pacific Northwest National Laboratory, Richland, WA.
Xie YL, CJ Murray, GV Last, and RD Mackley. 2003. Mineralogical and Bulk-Rock Geochemical Signatures of Ringold and Hanford Formation Sediments . PNNL-14202, Pacific Northwest National Laboratory, Richland, WA.

2002

Cantrell KJ, RJ Serne, and GV Last. 2002. Hanford Contaminant Distribution Coefficient Database and Users Guide. PNNL-13895, Pacific Northwest National Laboratory, Richland, WA.
Cantrell KJ, RJ Serne, and GV Last. 2002. Applicability of the Linear Sorption Isotherm Model to Represent Contaminant Transport Processes in Site-Wide Performance Assessments. PNNL-14576, Pacific Northwest National Laboratory, Richland, WA.
Horton DG, GV Last, TJ Gilmore, and BN Bjornstad. 2002. A Catalog of Geologic Data for the Hanford Site. PNNL-13653 Rev. 1, Pacific Northwest National Laboratory, Richland, WA.
Lindenmeier CW, RJ Serne, BN Bjornstad, GV Last, DC Lanigan, MJ Lindberg, RE Clayton, VL Legore, IV Kutnyakov, SR Baum, KN Geiszler, MM Valenta, and TS Vickerman. 2002. Characterization of Vadose Zone Sediment: Borehole C3103 Located in the 216-B-7A Crib Near the B Tank Farm. PNNL-14128, Pacific Northwest National Laboratory, Richland, WA.
Neitzel DA, AL Bunn, JP Duncan, TO Eschbach, RA Fowler, BG Fritz, SM Goodwin, DW Harvey, PL Hendrickson, DJ Hoitink, DG Horton, GV Last, TM Poston, EL Prendergast-Kennedy, AC Rohay, MJ Scott, and PD Thorne. 2002. Hanford Site National Environmental Policy Act (NEPA) Characterization. PNNL-6415-Rev. 14, Pacific Northwest National Laboratory, Richland, WA.
Serne RJ, BN Bjornstad, HT Schaef, BA Williams, DC Lanigan, DG Horton, RE Clayton, AV Mitroshkov, VL Legore, MJ O'Hara, CF Brown, KE Parker, IV Kutnyakov, JN Serne, GV Last, SC Smith, CW Lindenmeier, JM Zachara, and DS Burke. 2002. Characterization of Vadose Zone Sediment: Uncontaminated RCRA Borehole Core Samples and Composite Samples. PNNL-13757-1, Pacific Northwest National Laboratory, Richland, WA.
Serne RJ, GV Last, GW Gee, HT Schaef, DC Lanigan, CW Lindenmeier, MJ Lindberg, RE Clayton, VL Legore, RD Orr, IV Kutnyakov, SR Baum, KN Geiszler, CF Brown, MM Valenta, and TS Vickerman. 2002. Characterization of Vadose Zone Sediment: Borehole 299-E33-45 Near BX-102 in the B-BX-BY Waste Management Area. PNNL-14083, Pacific Northwest National Laboratory, Richland, WA.
Serne RJ, GV Last, HT Schaef, DC Lanigan, CW Lindenmeier, CC Ainsworth, RE Clayton, VL Legore, MJ O'Hara, CF Brown, RD Orr, IV Kutnyakov, TC Wilson, KB Wagnon, BA Williams, and DS Burke. 2002. Characterization of Vadose Zone Sediment: Borehole 41-09-39 in the S-SX Waste Management Area. PNNL-13757-3, Pacific Northwest National Laboratory, Richland, WA.
Serne RJ, GV Last, HT Schaef, DC Lanigan, CW Lindenmeier, CC Ainsworth, RE Clayton, VL Legore, MJ O'Hara, CF Brown, RD Orr, IV Kutnyakov, TC Wilson, KB Wagnon, BA Williams, and DS Burke. 2002. Characterization of Vadose Zone Sediment: Slant Borehole SX-108 in the S-SX Waste Management Area. PNNL-13757-4, Pacific Northwest National Laboratory, Richland, WA.
Serne RJ, HT Schaef, BN Bjornstad, DC Lanigan, GW Gee, CW Lindenmeier, RE Clayton, VL Legore, RD Orr, MJ O'Hara, CF Brown, GV Last, IV Kutnyakov, DS Burke, TC Wilson, and BA Williams. 2002. Characterization of Vadose Zone Sediment: Borehole 299-W23-19 [SX -115] in the S-SX Waste Management Area. . PNNL-13757-2, Pacific Northwest National Laboratory, Richland, WA.

2001

Last GV, and TG Caldwell. 2001. Core Sampling in Support of the Vadose Zone Transport Field Study. PNNL-13454, Pacific Northwest National Laboratory, Richland, WA.
Last GV, TG Caldwell, and AT Owen. 2001. Sampling of Borehole WL-3A through -12 in Support of the Vadose Zone Transport Field Study. PNNL-13631, Pacific Northwest National Laboratory, Richland, WA.
Horton DG, GV Last, TJ Gilmore, and BN Bjornstad. 2001. A Catalog of Geologic Data for the Hanford Site. PNNL-13653, Pacific Northwest National Laboratory, Richland, WA.
Murray CJ, GV Last, and YJ Chien. 2001. Enhanced Site Characterization of the 618-4 Burial Ground. PNNL-13656, Pacific Northwest National Laboratory, Richland, WA.
Neitzel DA, EJ Antonio, TO Eschbach, RA Fowler, SM Goodwin, DW Harvey, PL Hendrickson, DJ Hoitink, DG Horton, GV Last, TM Poston, EL Prendergast, AC Rohay, and PD Thorne. 2001. Hanford Site National Environmental Policy Act (NEPA) Characterization. PNNL-6415-Rev. 13, Pacific Northwest National Laboratory, Richland, WA.

2000

Last GV, and DG Horton. 2000. Review of Geophysical Characterization Methods Used at the Hanford Site. PNNL-13149, Pacific Northwest National Laboratory, Richland, WA.