Review of the Inland Estimated Recovery System Potential (ERSP) Prototype Calculator (2022) / Chapter Skim
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4 Findings and Recommendations
4 Findings and Recommendations
Pages 24-30
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From page 24... ...
Given the gap between intended outcome and actual outcome inconsistency in the provided documentation versus the actual software, combined with inability to get clarifications from USCG Inland ERSP Calculator developers, it was very difficult for the committee to do a comprehensive job of evaluating (i.e., reviewing and verifying) the calculator.
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From page 25... ...
Planners should not lose sight of all other response measures and should also recognize that the output is not currently linked to the existing regulatory planning standards. Finding 3: The USCG Inland ERSP Calculator is unable to properly characterize a response system.
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From page 26... ...
Finding 4: An Oil Behavior Module is a significant departure from the BSEE ERSP methodology and a component of the USCG Inland ERSP Calculator that makes it more complex and less transparent. It creates an impression that the USCG Inland ERSP Calculator can estimate a potential system recovery capacity in a specific scenario under specific conditions.
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From page 27... ...
The USCG Inland ERSP Calculator has several places where there appear to be duplicative inputs and other inputs that appear to only provide suggested values. Because it appears that there are multiple ways to provide inputs, it is not clear which ones are used in the calculator, and it is easy to set up situations that appear to be conflicting, for example, Planning Volume Classification and Source Type, where one can be associated with a vessel and the other a facility.
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From page 28... ...
It is suggested that the output of the calculator provides the oil mass balance with time: oil mass released, oil mass evaporated, oil mass trapped along the shoreline, oil mass potentially available for skimming, oil mass recovered by skimming over time, and recovery rates of water and oil. This will allow the user to determine the percentage of oil that is recovered, and recovery rates, based on both the original spill volume and the amount of potentially recoverable oil.
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From page 29... ...
With the addition of options made necessary to consider inland areas with open versus closed and stagnant versus flowing systems, the level of uncertainty has increased from the BSEE ERSP Calculator to the USCG Inland ERSP. This uncertainty has been noted in the verification and validation studies performed as part of the calculator's development.
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From page 30... ...
There are some improvements to the existing calculator that may be considered as necessary to allow the calculator to have value as either a planning tool or an educational or predictive tool. Recommendation 7.1: If the intent of the USCG Inland ERSP Calculator is to serve as a planning tool, and be focused on evaluating a maximum recovery potential of the recovery system in a nongeographic and not non-scenario-specific situation, the inputs related to the scenario and oil behavior should be limited to the minimum similar to the BSEE ERSP Calculator, so calculation is truly focused on the recovery system, not the environment (as described in Recommendation 4.2)
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