New Jersey Department of Environmental Protection, Site Remediation and Waste Management Program, Version 1.0, 105 pp, 2017

Sites with a commingled plume condition present challenges that can delay and complicate completion of required remedial activities. The technical tools and approaches presented in this manual are meant to provide a better understanding of the potential variability in the data collected, the inherent heterogeneity of the natural system, factors that influence the behavior of commingled plumes (e.g., infiltration rate, DNAPL presence), and other factors that might affect accuracy and confidence in the conceptual site model and subsequent decision-making. Technical approaches provided in this manual can be used to establish multiple lines of evidence to support remedial decisions. The guide also suggests a process to evaluate impacts and impediments to completing remedial activities. Professional judgment may result in a range of interpretations on the application of the technical guidance to site conditions. http://www.nj.gov/dep/srp/guidance/srra/commingled_plume_guidance.pdf