(SOPs) are adapted from published methods, or developed by in-house technical and administrative experts. Their primary purpose is for internal Ecology use, although sampling and administrative SOPs may have a wider utility. Our SOPs do not supplant official published methods. Distribution of these SOPs does not constitute an endorsement of a particular procedure or method. Any reference to specific equipment, manufacturer, or supplies is for descriptive purposes only and does not constitute an endorsement of a particular product or service by the author or by the Department of Ecology. Although Ecology follows the SOP in most instances, there may be instances in which Ecology uses an alternative methodology, procedure, or process. X:\EA PROGRAM\ECYEAPSOP\Approved SOPs\ECY_EAP_SOP_BenthicMacroinvertebrateDataCollection_v1_1EAP073.docx_02-10-12_Page_2SOP Revision Histor
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