Addendum 1: QAPP for Hydraulic Fracturing Retrospective Case Study, Bakken Shale, Killdeer and Dunn County: Analysis of Samples by the EPA Region VII Contract Laboratory for the October 2012 Sampling Event (GWERD)

This QAPP describes the technical details and associated quality assurance and quality control procedures for the Dunn County, North Dakota, Bakken Shale case study.

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