Betsy Day
Principal

Ms. Betsy Day, a principal scientist at Integral, is a highly regarded leader of environmental studies and sediment cleanup investigations in upland, marine, riverine, and estuarine environments in the Pacific Northwest. Ms. Day routinely provides senior-level consultation for sediment, soil, and water quality investigations, cleanup, and allocation projects on behalf of private clients and municipalities. During her 28 years of experience, she has directed a variety of highly visible cleanup investigations and sediment assessment activities, including in the Old Lead Belt (Missouri), Portland Harbor (Oregon), Slip 4, Lower Duwamish Waterway (Seattle, Washington), and Hylebos Waterway (Tacoma, Washington). She is an expert in the application of federal CERCLA and Washington State Model Toxics Control Act (MTCA) and Sediment Management Standards regulations and also provides expert testimony on CERCLA and NRDA allocation matters. Ms. Day has an extensive background with dredging programs having led aspects of the development of the Puget Sound Dredged Disposal Analysis (PSDDA) program, conducted dredged material characterizations for private clients, and directed the Washington State Department of Natural Resource’s dredging program in the early 1990s.