Hierarchy of Component Expressions

Hierarchy of the component expressions in the rules, from most dominant to least dominant:

1. SubSubType + Physical State + Boolean
2. SubType + Physical State + Boolean
3. Type + Physical State + Boolean
4. Physical State + Boolean
5. SubSubType + Physical State
6. SubType + Physical State
7. Type + Physical State
8. SubSubType + Boolean
9. SubType + Boolean
10. Type + Boolean
11. Physical State only
12. Boolean Only
13. SubSubType only
14. SubType only
15. Type only
16. Neither Type/Subtype/SubSubType, Physical State, or Boolean

Note: Boolean means a field that is either Yes/ No. The Boolean fields in Chateau are  UTM, NDE, or CVS.

Example #1:

If there is a 10000 ppm catch-all leak definition (Neither Type/Subtype/SubSubType, Physical State, or Boolean), any other leak definitions which are more specific in their component expressions (contains Type/SubType/SubSubType, Physical State, Boolean or a combination of above) will take a higher precedence over it. This arrangement is preferred in most situations.

However, there are situations where specific setups are needed to correctly assign monitoring requirements or leak definitions.

Example #2:

If connectors (Type only) have weekly AVO frequency and CVS components (Boolean only) have annual AVO frequency, Chateau will assign annual AVO frequency to a CVS connector because “Boolean Only” is more dominant than “Type Only”. We will have to assign weekly AVO separately to CVS connectors (Type + Boolean) if we want to schedule weekly inspections for them.

Example #3:

If NDE Valve (Type + Boolean) have the leak definition of 500 PPM and light liquid Valve (Physical State + Type) have the leak definition of 2000 PPM, Chateau will assign 2000 PPM leak definition to an NDE light liquid Valve, because “Physical State + Type” is more dominant than “Type + Boolean”. In this case we need to specify the physical state of the NDE Valve (Type + Physical State + Boolean), then the Valve will have 500 PPM leak rate applied to it.