TM22-01 Attachment 1: Appendix to National Water Quality Laboratory Technical Memorandum 2022.01 -- Laboratory contamination bias leads to limits on low-concentration data reporting

Appendix to Laboratory contamination bias leads to limits on low-concentration data reporting for hexamethylenetetramine and data reload for hexamethylenetetramine, and metadata reload for gabapentin, guanylurea, and ractopamine, to the National Water Information System for samples analyzed from October 2016 through March 4, 2021, for pharmaceuticals in filtered water by National Water Quality Laboratory schedule 2440.