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Directory Results for Ineffective Oversight of Purchase Cards Resulted in Improper Purchases at EPA OIG. 15-B-0014, November 10, 2014. The EPA OIG needs to improve and comply with internal controls for purchase cards. - epa to Ineffective Oversight of Purchase Cards Results in Inappropriate Purchases at EPA. 14-P-0128, March 4, 2014. The EPA did not provide effective oversight to ensure that purchase card holders and approving officials comply with procedures. -