HON Leak - Connectors – LDARtools

What this report does

Calculates the connector leak rate for each selected unit under the HON (Hazardous Organic NESHAP) regulation. The report shows how many connectors were monitored, how many leaks were found, and whether the unit's leak rate exceeds the 2% DOR (Delay of Repair) threshold.

The period covered is automatically determined from the regulation's monitoring schedule — no date entry is required. The report uses the most recently completed monitoring period for each unit and regulation.

Use this report to verify HON connector compliance at the end of a monitoring period and to identify units that are at or above the 2% threshold. This report is in the Leak folder on the Reports tab.

When to use it

Reviewing connector leak rates at the end of a monitoring period.
Confirming that pre-existing DORs are accounted for correctly in the threshold calculation.
Determining whether any units exceed the 2% connector DOR threshold.

Parameters

Parameter	Description	Required	How it filters
Regulation	The HON regulation to report on	Yes	Only connectors mapped to this regulation are included
Unit Type	Whether to filter by Process Unit or Location Unit	Yes	Determines which unit list populates
Units	One or more units to include	Yes	One output row per selected unit
Apply 0.67 Net Deactivated Credit	Whether to apply the 0.67 deactivation credit to the denominator	Yes	When Yes, net deactivations during the period are multiplied by 0.67 and added to the denominator

No date parameters. The monitoring period is automatically calculated from the regulation's monitoring schedule. The report uses the most recently completed monitoring period for the selected regulation and units — no start or end date entry is needed.

Columns

Column	What it shows	Format / Notes
Unit	The unit name	Text
Monitored	Number of connectors monitored during the period	Integer
Act	Number of connectors activated (added) during the period	Integer
DeAct	Number of connectors deactivated during the period	Integer
Net DeAct	Net deactivations: DeAct minus Act; floored at zero	Integer; negative results are shown as 0
Credit (Times 0.67)	Deactivation credit added to the denominator when the credit option is enabled	Decimal; Net DeAct × 0.67 when credit is applied; 0 when credit is not applied
Denominator	Total used as the bottom of the leak rate calculation	Decimal; Monitored + Credit + Pre-Existing DORs
Leaks Found	Number of connector leaks found during the monitoring period	Integer
Pre-Existing DORs	Number of connectors that had an open DOR at the start of the monitoring period	Integer
Total Connectors	Total number of active connectors in the unit at the end of the period	Integer
2% of Total	Two percent of the total connector population, rounded to the nearest whole number	Integer; the DOR threshold ceiling
Excess DORs	Pre-existing DORs above the 2% threshold	Integer; max(0, Pre-Existing DORs − 2% of Total); 0 when pre-existing DORs do not exceed the threshold
New Comps	Number of new connectors added to the system during the monitoring period	Integer
Numerator	Total used as the top of the leak rate calculation	Integer; Leaks Found + Excess DORs
Leak Rate	Connector leak rate for the period, expressed as a percentage	Decimal (1 decimal place); Numerator ÷ Denominator × 100
Period Start	First day of the monitoring period	Date
Period End	Last day of the monitoring period	Date
Frequency	Monitoring frequency assigned to the unit under this regulation	Text; e.g., "Annual", "Semi-Annual"

What's included and excluded

Included:

Only connectors (component type Connector) mapped to the selected regulation.
Only components in the selected unit(s).
Connectors monitored during the automatically determined monitoring period.

Excluded:

Non-connector component types (valves, pumps, etc. — see related reports for those).
Connectors classified as Exempt or HL (heavy liquid) under the regulation.
Components not mapped to the selected regulation.

How key values are calculated

Monitoring period (auto-calculated)

The report determines the most recently completed monitoring period automatically based on the regulation's monitoring schedule. There are no date inputs — the period boundaries are derived from the regulation configuration and appear in the Period Start and Period End columns.

Denominator

The denominator represents the adjusted connector population used for the leak rate calculation:

Denominator = Monitored + Credit (Times 0.67) + Pre-Existing DORs

Monitored — connectors for which monitoring was completed during the period.
Credit (Times 0.67) — when the deactivation credit is enabled, net deactivations (DeAct − Act, floored at zero) are multiplied by 0.67 and added. This credit reflects connectors removed from service and reduces the effective monitored population.
Pre-Existing DORs — connectors that already had an open DOR at the start of the period are added to the denominator (they are already being managed and count toward the total).

Pre-Existing DORs and Excess DORs

Pre-existing DORs are connectors on an active Delay of Repair at the beginning of the monitoring period. The regulation allows a 2% DOR threshold — up to 2% of the total connector population may be on DOR without penalty. Pre-existing DORs within that 2% threshold are absorbed; any amount above it becomes Excess DORs, which are added to the Numerator.

Excess DORs = max(0, Pre-Existing DORs − 2% of Total Connectors)

Numerator

Numerator = Leaks Found + Excess DORs

Leaks found during the monitoring period plus any pre-existing DORs that exceed the 2% threshold. When pre-existing DORs are within the 2% allowance, Excess DORs is 0 and the Numerator equals Leaks Found only.

Leak Rate

Leak Rate = (Numerator ÷ Denominator) × 100

Expressed as a percentage to one decimal place. A unit exceeds the HON connector threshold when Leak Rate > 2.0%.

New Comps

Connectors whose add date falls within the monitoring period. These are newly created components — this column provides context for understanding population changes during the period.

Tips and common questions

"Why is there no date parameter?" The report automatically determines the most recently completed monitoring period from the regulation's monitoring schedule. The period dates are shown in the Period Start and Period End columns of the output.
"What is the DOR threshold for connectors?" The threshold is 2% — twice the 1% threshold used for valves. A unit's leak rate must exceed 2.0% before it is out of compliance.
"When should I apply the 0.67 deactivation credit?" Apply it when your facility has deactivated connectors during the period and you want to account for the reduction in the monitored population. The credit adjusts the denominator upward (adding 0.67 × net deactivations), which lowers the effective leak rate.
"Why are Pre-Existing DORs added to both the denominator and potentially the numerator?" Pre-existing DORs are always added to the denominator because they are part of the overall connector population being managed. If they exceed the 2% threshold, only the excess portion is added to the numerator — the threshold amount is not penalized.
"A unit has no data row." Units with no monitored connectors mapped to the selected regulation will not appear in the output. Confirm that the unit has connectors with the correct regulation assigned and that monitoring occurred during the period.
"What does 'Pre-Existing DORs' mean in the formula?" Pre-Existing DORs are Delay of Repair records that were already open at the start of the reporting period — DORs that were approved before the period began and had not yet been closed. They are included in the denominator to credit the facility for leaks that were already under active repair at the start of the period.

Sample output

In this example: Pre-Existing DORs (12) equals exactly 2% of Total Connectors (600 × 0.02 = 12), so Excess DORs = 0 and Numerator = Leaks Found only. Leak Rate = 7 ÷ 510.0 × 100 = 1.4%, below the 2% threshold.

Output format

One row per unit. Suitable for on-screen viewing, PDF, and Excel export.

Related reports

HON Leak Report — the primary HON leak report covering all component types with full leak detail; this report summarizes connector-specific rates.
HON Leak - Valves — the rolling-average valve leak rate report; uses the same deactivation credit option but a different calculation method (1% threshold, rolling average across periods).
HON Leak - Pumps — pump leak rate report; does not use the deactivation credit; subtracts leaks found on newly added pumps from both the numerator and denominator.