SWMU Building 43 Chronology

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Solid Waste Management Unit Building 43

Chronology of Actions/Investigations

Year	Month	Action/Results	Action Performed By	Project Number
Unknown	Unknown	Inactive makeshift ammunition demolition facility was used to burn miscellaneous solid waste and ammunition. The area adjacent to Building 43 is covered with molten metal and spent ammunition.	CSSA	NA
1995	July	Soil gas survey completed on July 19 between SWMUs B-3 and B-4 included SWMU Bldg. 43 area; however, the soil gas survey grid was spaced at every 100 ft. Bldg. 43 is only approximately 20 by 25 feet, so the soil gas survey interval was not adequate to characterize the Bldg. 43 site; however, TCE was detected in one soil gas sample at the Building 43 site.	Parsons ES	Order 67
1996	February	Work Plan for Building 43 Investigation was submitted.	Parsons ES	RL17
1996	March - April	EM geophysical survey performed on March 13 and April 2; one geophysical anomaly found that was not related to suspected waste management activities.	Parsons ES	RL17
1997	August	Surface of site was swept by UXB for UXO on August 28. No UXO was found, only surface debris.	Parsons ES UXB	RL33
1998	March	Addendum to Work Plan submitted for additional investigation at Building 43.	Parsons ES	RL53
2000	February - March	Advanced 6 soil borings (SB1-6) and collected 18 soil/rock samples for VOCs, SVOCs, metals and explosives (3 samples) and VOCs, metals and explosives (15 samples) for analysis.	Parsons ES APPL, Inc. Data Chem	RL53
2001	March	One wipe sample was collected from the Bldg. 43 burn box and analyzed for dioxins and furans. No dioxins or furans were detected above their RLs.	Parsons	RL53
2002	December	Final RCRA Facility Investigation Report submitted.	Parsons	RL53
2003	March	Ten additional surface soil samples collected for metals analysis in an effort to define horizontal extent of contamination.	Parsons APPL, Inc.	RL17
	June	Final RCRA Facility Investigation Report Addendum submitted.	Parsons	RL17
	December	Final TO 0019 Work Plan Addendum submitted.	Parsons	TO19
2004	July	Excavated soil around building. Confirmation and waste characterization samples collected.	Parsons	TO19
2004	November - December	Excavated soil hauled off and building demolished.	Parsons	TO19
2005	January	Approximately 100 cu. yds. of soil treated with PIMS. Scrapped up another 300 cu. yds. of soil from the surface.	Parsons	TO19
	February - March	Hauled out excavated soils to Covel Gardens. Collected confirmation samples from sidewalls and bottom surface of excavation.	Parsons	TO19
	April	*Final RCRA Facility Investigation Closure Report* submitted.	Parsons	TO19
	August	Closure approved by TCEQ.	TCEQ	NA