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Area of Concern 42
Chronology of Actions/Investigations
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Action Performed by |
Project Number |
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1995 |
May |
Geophysical survey was conducted at all the "open" areas within a 2,000-foot radius of well 16, including AOC 42. Found four anomalies. Anomaly A may be associated with the trash pile present in the same area, and has been designated as AOC 62. Anomalies B, C, and D may be additional trenches due to their proximity to other trenches, and have been designated as AOC 42. |
Parsons ES |
Order 67 |
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June - July |
Fourteen soil-gas survey samples collected and analyzed for chlorinated and aromatic volatile organics. PCE was the only target analyte detected. |
Parsons ES |
Order 67 |
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1999 |
December |
Geophysical survey was conducted at the site. Six identifiable anomalies were found. Anomalies A, B and C are the strongest anomalies and may indicate buried metallic objects in the trenches. Anomaly D is weaker, but may be associated with Anomalies A, B and C. Anomalies E and F are visible in GPR and EM phase and are individual from each other and the other four anomalies. |
Parsons ES |
DO5068 |
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2001 |
March |
Nine soil borings completed and surface and subsurface soil samples collected (AOC42SB01-AOC42SB09, sampled for VOCs, explosives and metals). |
Parsons |
DO 5068 |
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2002 |
October |
Final RCRA Facility Investigation Report submitted. |
Parsons |
DO 5068 |
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2011 |
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March - April |
Began exploratory excavation and soil sampling |
Parsons |
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August |
Release Investigation Report submitted to TCEQ |
Parsons |
NA |
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December |
Parsons |
NA |