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Solid Waste Management Unit
B-71Chronology of Actions/Investigations
|
Year |
Month |
Action/Results |
Action Performed by |
Project Number |
|
1930s and 1940s |
Unknown |
Landfill, formerly owned by the Blank Family, Blank Ranch. |
CSSA |
NA |
|
2006 |
December |
Aerial photograph review for visual indications of past waste disposal activities. |
Weston |
NA |
|
2007
|
February |
Geophysical survey to investigate potential presence of buried metals. |
Weston |
NA |
|
March |
Exploratory trenching conducted to investigate geophysical survey anomalies. Soil samples collected from multiple trench locations for analysis of VOCs, SVOCs, explosives, metals, perchlorate, and PCBs. |
Weston |
NA |
|
|
June |
Resample of selected locations identified in March 2007 for metals analysis. |
Weston |
NA |
|
|
2008 - 2009 |
November - February |
Interim removal action to address munitions debris and contaminated soil. |
Weston |
NA |
|
2009 |
June |
Additional soil samples collected for horizontal and vertical contaminant delineation. |
Weston |
NA |
|
2011 |
February |
Additional soil samples collected to confirm native soil residual contaminant concentrations were below ecological risk levels. |
Weston |
NA |
|
April |
Additional surface soil samples collected to delineate mercury impact above the ecological risk screening benchmark value at AOC-64. |
Parsons |
NA |
|
|
June |
Final Affected Property Assessment Report for SWMU B-71 and AOC-64 submitted to TCEQ. |
Weston |
NA |
|
|
October |
TCEQ |
NA |