Maize grown in the Sub Sahara is often contaminated with aflatoxins due to an ear rot disease caused by A. flavus and poor postharvest handling (Atehnkeng et al., 2008, Mukanga et al., 2010, Setamou et al., 1997, Wagacha and Muthomi, 2008). Non-uniformity of the contamination within a grain mass leads to high variability in aflatoxin assessments and results that often conflict with expected norms (Mallmann et al., 2014). The maize used in this study was ideal for addressing the efficacy of hermetic storage. The amount of grain dust and BCFM, which contributed to a U.S. No. 5 grading, increased the vulnerability of the grain to insect and fungal invasion as well as moisture absorption. Additionally, the two storage locations (Indiana and Arkansas) provided environmental conditions that were starkly different. The placement of satchels of aflatoxin-free grain in close proximity to highly contaminated grain allowed us to address the central question of whether aflatoxin accumulation occurs in either the PICS or woven bags during storage.