AOC 62 - Chronology of Actions/Investigations

Year	Month	Action/Results	Action Performed By	Project Number
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
1995	June-July	Fourteen soil-gas survey samples collected and analyzed for chlorinated and aromatic volatile organics. PCE was the only target analyte detected.	Parsons	Order 67
2010	December	Completed XRF survey of 16 locations	Parsons	NA
2011	March	Completed excavation, collected confirmation and waste characterization samples.	Parsons	NA
	April	Collected additional samples – results clean.	Parsons	NA
	August	Release Investigation Report submitted to TCEQ	Parsons	NA
	December	*Closure approved by TCEQ*.	TCEQ	NA