Tag 42 – Non-Increasing ReTest

1
2
3
4
1

Note a Quarterly Monitoring event followed by 2 NON Increasing ReTests (1000 PPM > 55 PPM > 15 PPM.)

2
A PPM event begins this Interval. We use it to calculate our Reference HER: (1000PPM^.746) times 2.29E-03 or .000396. We will use this for the HERs for Interval 1 and 2.
3

Since we don’t have a PPM in the first Interval, we get the PPM that started the next Interval and calculate this HER for a LL Valve Refinery using 1,000 PPM.

4

Even though we know that the PPM at the beginning of the next Interval is only 50 PPM and we USUALLY use the NEXT PPM to calculate an average HER for each Interval, in the event of a non Increasing ReTest, we use the higher, leaking HER for the entire in Interval from the leak to the ReTest. This happens twice for this component.