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Solid Waste Management Unit B-19
Chronology of Actions/Investigations
|
Year |
Month |
Action/Results |
Action Performed By |
Project Number |
|
Unknown |
Unknown |
Site used as “scrape” area to collect dirt and gravel. Miscellaneous solid waste, metal, and weapons may have been disposed at the site. |
CSSA |
NA |
|
1992 |
October |
Reviewed available records at CSSA during preliminary evaluation for groundwater contamination. |
Parsons ES |
Order 67 |
|
1995 |
February |
Performed GPR survey at the site. |
Parsons ES |
Order 67 |
|
1995 |
February |
Performed EM geophysical survey on February 3. Found no geophysical anomalies. |
||
|
1995 |
February |
Drilled three soil borings (SB1-3) between February 23 and 27, and collected soil/rock samples. The chromium concentration in one sample slightly exceeded the background concentration. Phthalates were detected in every sample. Results are summarized in Table B19-1. |
Parsons ES |
Order 67 |
|
1995 |
February |
Collected groundwater sample from SB3 on February 28 and analyzed for VOCs. None found. Results are summarized in Table B19-1. |
Parsons ES |
Order 67 |
|
1995 |
June |
Because VOC holding times for the February 1995 samples were missed, redrilled three soil borings (SB1R-3R) and collected soil/rock samples. Found no VOCs in samples. Results are summarized in Table B19-1. |
Parsons ES |
Order 67 |
|
1995 |
June |
Collected three groundwater samples from SB1R-3R on June 14 and 15. Found PCE in SB2R at a concentration exceeding the RRS2-GW standard. |
Parsons ES |
Order 67 |
|
1996 |
February |
Work Plan for B-19 investigation submitted. |
Parsons ES |
RL17 |
|
1996 |
August - September |
Drilled three soil borings (SB4-6) between August 30 and September 4, and collected soil/rock samples. Analytical results are currently in question due to ITS Laboratory practices. |
Parsons ES |
RL17 |
|
1999 |
April |
EPA memorandum indicated analytical results obtained from ITS are not usable. |
EPA |
NA |
|
1996 |
November |
Submitted work plan for resampling to replace analytical chemistry data generated by ITS Laboratory. |
Parsons ES |
Rework |
|
2000 |
March |
Advanced 3 soil borings (SB1-3) for Rework and collected 9 samples for chromium and Di-n-butylphtalate analysis. |
Parsons ES |
Rework |
|
2002 |
June |
Parsons |
RL17 |
|
|
2002 |
September |
TCEQ |
NA |