Drainage and Utilities defines unit sanitary loads in editable Engineering Libraries, allowing you to edit predefined unit sanitary loads and insert new ones. A unit sanitary load is used to specify loads to a sewer system for a user-selected loading unit. Unit sanitary loads can be either population-based or non-population-based. Population-based unit sanitary loads specify a load to the sewer system as a function of the contributing population. Non-population-based loads specify loads based on service area, discharge, or user-defined counts.

You add unit sanitary loads using the Unit Sanitary (Dry Weather) Loads dialog box or Engineering Libraries.

To add a unit sanitary (dry weather) load:

1. Select Component > Loading > Unit Sanitary (Dry Weather) Loads.
2. In the Unit Sanitary (Dry Weather) Loads dialog box, click the New button, then select the type of unit sanitary load you want to create from the submenu (Area, Count, Discharge, or Population).
3. On the Unit Sanitary Load tab, enter the following data: For area-based loads, select the desired unit from the Area Unit drop-down menu. For discharge-based loads, select the desired unit from the Discharge Units drop down menu. For count-based loads, type the base unit used to define the count-based load in the Count Load Unit field. You can specify any unit you want, such as loading per vehicle, machine, or anything else. For population-based loads, select the desired unit from the Population Units drop-down menu. Type the amount of flow contributed per loading unit in the Unit Load field. Type the count of adjusted population per loading unit in the Population Equivalent field. For area based loads, this is essentially a population density, or population per unit area. Check the Report Adjusted Population check box to report the adjusted population with other populations. If you clear this check box, the adjusted population will not be reported as part of the total population.
4. You can save your new load in Engineering Libraries for future use. To do this, perform these steps: Click the Synchronization Options button, then select Export to Library. The Engineering Libraries dialog box appears. Use the plus and minus signs to expand and collapse the list of available libraries, then select the library into which you want to export your new unit sanitary load. Click Close to close the Engineering Libraries dialog box.
5. Perform the following optional steps: To delete a load, select the load label then click Delete. To rename an load, select the load label you want to rename, click Rename, then type the new name for the load. To view a report on a load, select the load label for which you want a report then click Report.
6. Click Close to close the Unit Sanitary (Dry Weather) Loads dialog box.

To add a unit sanitary load in the Engineering Library:

1. Select Components > Catalog > Engineering Libraries to display the Engineering Libraries dialog box.
2. Click the plus sign next to the Unit Sanitary (Dry Weather) Loads Library to expand the list of items (categories and folders) included in that library. This library includes a category entitled Unit Sanitary (Dry Weather) Loads. You can add new items to a category or a folder, add new folders to categories, and add new categories to libraries.
3. Right-click the Unit Sanitary (Dry Weather) Loads category (or a different category or folder) and select New Item.
4. Define the new unit sanitary load in the Editor pane on the right as described in the following steps: Type the unit load in the Unit Load field. Select the load type from the Loading Unit Type drop-down (Area Based, Count Based, Discharge Based, or Population Based). Select the load units from the Sanitary Unit Load Units drop-down. For count-based loads, you can specify any unit you want, such as loading per vehicle or machine. For area-, count-, and discharge-based loads, type the count of adjusted population per loading unit in the Pop.Equivalent (Capita) field. For area based loads, this is essentially a population density, or population per unit area. For area-, count-, and discharge-based loads, select True from the Report Adjusted Population drop down to report the adjusted population with other populations. Select False if you don't want to report the adjusted population as part of total population.
5. Click Close. Your new unit sanitary load is now part of the Engineering Libraries and can be re-used any time.

Unit Sanitary (Dry Weather) Load Dialog Box

This dialog box allows you to create unit sanitary (dry weather) loads. There are two sections: the list pane on the left and the tab section on the right. The list pane lets you create, edit, and delete unit sanitary loads and the tab section contains entry fields for each type of unit sanitary load.

The following controls are available in the Unit Sanitary (Dry Weather) Load dialog box:

• New: Creates a new unit sanitary load that uses an automatically created label. Area—Adds a new area-based unit sanitary load to the list pane. An area-based unit sanitary load is a function of contributing service area. Count—Adds a new count-based unit sanitary load. A count-based unit sanitary load is a function of a user-defined count. Count-based unit sanitary loads should be used for any load that is not area-, discharge-, or population-based. Discharge—Adds a new discharge-based unit sanitary load. A discharge-based unit sanitary load is a function of direct discharge. Population—Adds a new population-based unit sanitary load. A population-based unit sanitary load is a function of adjusted contributing population.
• Delete: Deletes the currently highlighted unit sanitary load.
• Rename: Lets you rename the currently highlighted unit sanitary load.
• Report: Lets you generate a preformatted report that contains the input data associated with the currently highlighted unit sanitary load.
• Clicking this button opens a submenu containing the following commands: Browse Engineering Library—Opens the Engineering Library manager dialog, allowing you to browse the Unit Sanitary (Dry Weather) Load Engineering Libraries. Synchronize From Library—Lets you update a set of unit sanitary loads previously imported from a Unit Sanitary (Dry Weather) Load Engineering Library. The updates reflect changes that have been made to the library since it was imported. Synchronize To Library—Lets you update an existing Unit Sanitary (Dry Weather) Load Engineering Library using current unit sanitary loads that were initially imported but have since been modified. Import From Library—Lets you import a unit sanitary load from an existing Unit Sanitary (Dry Weather) Load Engineering Library. Export To Library—Lets you export the current unit sanitary load to an existing Unit Sanitary (Dry Weather) Load Engineering Library. Connect to Library—Opens the Engineering Library, allowing you to select a library to synchronize with the current entry.

The tab section includes the following controls:

• Area Unit: Lets you specify the base unit used to define the area-based load.
• Unit Load: Lets you specify the amount of flow contributed per loading unit.
• Population Equivalent: Lets you specify the count of adjusted population per loading unit. For area based loads, this is essentially a population density, or population per unit area. The Population equivalent field is optional and simply converts area or count into equivalent population, based on the Population equivalent value.
• Report Adjusted population: If this option is toggled ON, the adjusted population will be reported with other populations. If the option is OFF, adjusted population will be not be reported as part of the total population.
• Count Load unit: Lets you specify the base unit used to define the count-based load. You can specify any unit you want, such as loading per vehicle, machine, or anything else.
• Discharge Units: Lets you specify the base unit used to define the discharge-based load.
• Population Units: Lets you specify the base unit used to define the unit load.
• Library Tab: This tab displays information about the unit sanitary load that is currently highlighted in the list pane. If the load is derived from an engineering library, the synchronization details can be found here. If the load was created manually for this model, the synchronization details will display the message Orphan (local), indicating that the pump was not derived from a library entry.
• Notes Tab: This tab contains a text field that allows you to enter descriptive notes that will be associated with the currently highlighted definition.