"One sampling site per zone has been designated on the west pipeline, with four of the sites coinciding with holiday areas." The report goes on to state, "Enbridge will retrieve representative samples of delaminated coating from the bottom of the Straits," to examine the thickness of the coating and how deeply biota may have penetrated it. The report even includes tables laying out the specific locations of the missing coating, where biotic samples will be taken: "Holiday south of E01B," "Holiday north of E76A," "Holiday south of W35B North," and so on. Line 5 Biota Investigation Work Plan It raises a significant number of questions, McKay said — questions she's asking Enbridge to answer for the Pipeline Safety Advisory Board. "How many? Where are they? How extensive is the coating loss?" she said. "How long have you known about it? When was it discovered? And why are we finding out about it in a biota work plan?" Duffy, however, maintained the company is aware of no coating loss.