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[SWMU B-1]
Solid Waste Management Unit B-1
Chronology of Actions/Investigations
|
Year |
Month |
Action/Results |
Action Performed By |
Project Number |
|
1954 |
Unknown |
Powder and ammunition burn area used for burning powder and incendiary materials. |
CSSA |
NA |
|
1992 |
October |
Reviewed available records at CSSA during preliminary evaluation for groundwater contamination. |
Parsons ES |
Order 67 |
|
1995 |
February |
Performed EM geophysical survey on February 10. Found no geophysical anomalies. |
Parsons ES |
Order 67 |
|
1995 |
February |
Performed GPR survey at the site. |
Parsons ES |
Order 67 |
|
1995 |
February |
Drilled three soil borings (SB1-SB3) on Feb. 21 and 22 and collected soil/rock samples. Phthalates were detected in each of the borings; however, SVOC results were rejected due to deficiencies in quality control criteria. Results are summarized in Table B1-1. Metals concentrations were below the background levels. |
Parsons ES Chemron JEDI |
Order 67 |
|
1995 |
February |
Collected sample of shallow perched groundwater from SB3 on February 23. A low concentration of chromium (below the MCL) was detected in the duplicate sample only. Results are summarized in Table B1-2. |
Parsons ES Chemron |
Order 67 |
|
1995 |
June |
Drilled one soil boring (SB1R) on June 13 and collected soil/rock samples. Soil boring was redrilled and resampled due to laboratory QA/QC problems from sampling effort in February. No analytes found above comparison criteria. |
Parsons ES Chemron JEDI |
Order 67 |
|
1996 |
February |
Parsons ES |
RL17 |
|
|
1996 |
August - September |
Drilled three soil borings (SB4-SB6) on August 20 through September 4 and collected soil/rock samples for SVOC analysis. These analytical results are currently in question due to ITS Laboratory practices. |
Parsons ES CoreTerra ITS |
RL17 |
|
1999 |
April |
EPA memorandum indicated analytical results obtained from ITS are not usable. |
EPA |
NA |
|
1999 |
November |
Submitted work plan for resampling to replace analytical chemistry data generated by ITS Laboratory. |
Parsons ES |
NA |
|
2000 |
March -April |
Drilled three soil borings for rework (SB4-SB6) and collected 8 rock/soil samples for SVOC analysis. |
Parsons ES APPL, Inc. |
Rework |
|
2002 |
July |
Final RCRA Facility Investigation/Closure Report submitted to TCEQ. |
Parsons |
RL17 |
|
2002 |
November |
TCEQ |
RL17 |