: "21:04 Min" likely represents a duration or a precise time of measurement recorded during a field survey.
Project Portal Landfill Data Management - Sanborn Head NSPS-94103:21:04 Min
In the field of land surveying, refers to the National Society of Professional Surveyors . : "21:04 Min" likely represents a duration or
: Systems like Project Portal manage NSPS workflows for landfill gas or industrial emissions. 3. Human Resources (National Security Personnel System) NSPS-94103:21:04 Min