The MS4 Outfall Inventory schema can be used to to record outfall inventory and sample collection with Survey 123.
To get started, download the Survey 123 desktop tool: Survey 123
After installing, create a 'New Survey'. Then click 'Browse' and select the 'Outfall Inventory.xlsx' spreadsheet.
Survey 123 will import the xlsx file and create a new project. Feel free to use the schema as is or change it as needed.
Requires: ArcGIS Online/Portal for Organizations