A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) A Letter Report (2013) / Chapter Skim
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report INTRODUCTION The Bureau of Safety and Environmental Enforcement (BSEE)
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report 2 REVIEW OF THE EDRC REPORT mechanical recovery to address a particular scenario, the response plan would better demonstrate that it indeed covers a variety of possible environmental conditions and response options (Figure 1)
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report LETTER REPORT 3 dispersants, and shoreline protection and cleanup -- are available to oil spill responders.
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report 4 REVIEW OF THE EDRC REPORT Another assumption of the current EDRC approach is that a skimmer's efficiency remains at the same daily rate over time after a spill.
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report LETTER REPORT 5 • The calculations account for time to decant collected water.
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report 6 REVIEW OF THE EDRC REPORT proportional to the swath width of the collecting booms and the speed of the skimmer.
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report LETTER REPORT 7 They summarized spreading as follows.
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report 8 REVIEW OF THE EDRC REPORT The ROC model results are not consistent with the field observations described above because the ROC results focused only on thick oil.
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report LETTER REPORT 9 oil would be available for skimming in areas of these scales.
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report 10 REVIEW OF THE EDRC REPORT 50 by 50 rectangular cells of equal size, and the mean in each cell is calculated.
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report LETTER REPORT 11 model calculator, the average encounter thickness is then calculated as the thick oil thickness multiplied by the fraction of the swath that is actually oil (i.e., the patchiness factor for the day after the release)
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report 12 REVIEW OF THE EDRC REPORT referring to an important physical process, does not lend itself to general public comprehension, particularly for a continuous spill event.
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report LETTER REPORT 13 • Emulsion proportion: Defined as the percentage of water in the emulsion being encountered, this parameter is set to 0 as a default.
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report 14 REVIEW OF THE EDRC REPORT Both the EDRC and the ERSP approaches assume that skimming systems are operated by skilled personnel capable of adjusting system settings to reflect recovery conditions.
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report LETTER REPORT 15 through use of the Beaufort Wind Scale, 17 which correlates the wind speed with the wave height and visual appearance of the sea surface.
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report 16 REVIEW OF THE EDRC REPORT expressed in minutes, not in hours; in the calculation of the "Area Covered in Op Period," one should multiply, instead of divide, by 60; and in the calculation of "Total Volume of Oil/Emulsion Recovered/Operating Period," the factor 1.43 is missing that should multiply "Water Retained Rate." However, the Genwest report does not explain the meaning of the factor, "1.43." The committee recommends that the equations of ERSP be typeset unambiguously, accompanied by a clear definition of variables and their units of measurement and also by a succinct explanation of the rationale for the modeling assumptions and choices that are made.
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report LETTER REPORT 17 applied to the variables whose uncertainty has been propagated.
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report 18 REVIEW OF THE EDRC REPORT FIGURE 2 (A)
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report LETTER REPORT 19 CONCLUSIONS AND RECOMMENDATIONS In summary, the committee finds that the current EDRC method for planning standards in oil spill preparedness is in need of substantial update and that the frame work offered by the ERSP calculator is a good basis for doing so.
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report 20 REVIEW OF THE EDRC REPORT "Day 2" and 5% (i.e., 0.05 times the thick-oil thickness)
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report LETTER REPORT 21 BOX 1 Short Responses to Statement of Task Questions Methodology Examining the oil skimming system, rather than the skimmer alone, is a necessary and important Are the methods used to estimate an oil skimming system necessary and scientifically sound?
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A Review of Genwest's Final Report on Effective Daily Recovery Capacity (EDRC) : A Letter Report 22 REVIEW OF THE EDRC REPORT BOX 1 Continued The use of the term "Day" addresses the important practical planning issue that the nominal average Is the use of the unit "Day" to describe thickness an appropriate metric?
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