If the DCGLW was derived by environmental pathway modeling, then as the survey unit size changes in the model, the DCGLW may change too. Several factors affect this relationship, including the radionuclides of concern, the potential exposure pathways, and the uncertainties inherent in the model. Therefore, when considering changing the survey unit size, it is best to work with an experienced environmental pathway modeler to fully account for all the complexities inherent at the site. These changes may or may not affect survey design. It is important to talk with a regulator to determine if the resulting changes have significant impact on the DCGLW previously agreed upon..
For more information on the MARSSIM process, visit MARSSIM on EPA.gov.