OverviewDeveloped by:Purpose:Sensitivity analysis on how scale accuracies effect the relative uncertainty of emission estimates in the electric powerequipment manufacture sector (Subpart SS of the MRR)Developed by:Mollie Averyt, ICF International, maveryt@icfi.comDeveloped for:U.S. EPAContract:EP-W-07-068, Task Order 68Date:Last major modifications on 07/6/2010Switch manufacturer(i.e., low andmedium voltage)ValueRelativeUncertaintyAbsoluteUncertaintyAccuracy:1%Decreases in SF6 Inventory50000.6%29.2SF6 in containers at begin450000.05%21.2Inventory weights (incremental)100SF6 in containers at end400000.05%20.0acquisition weights (incremental)115Acquisitions of SF6480000.44%210.3acquisition-cylinders per scale5SF6 from producers470000.45%210.2dispursement weights, all but supplier (incremental)115SF6 returned with equipment01.00%-dispursement weights, return to supplier (incremental)10SF6 returned after recycling10000.71%7.1dispursements-cylinders per scale5Disbursements of SF6376000.1%21.2SF6 in new equipment delivered to customers370000.06%20.6Number of scales used by suppliers to OEMs5SF6 returned to suppliers1000.58%0.6SF6 sent off site for recycling5001.00%5.0SF6 destroyed01.00%-Emissions154001.4%213.4Emission Rate32%High Voltage OEM (138KV breakers)ValueUncertaintyAbsoluteUncertaintyDecreases in SF6 Inventory-30001.3%39.1SF6 in containers at begin75,0000.04%27.4SF6 in containers at end78,0000.04%27.9Acquisitions of SF612,0000.24%29.1SF6 from producers6,0000.45%26.8SF6 returned with equipment2,5000.45%11.2SF6 returned after recycling-1.00%0.0Disbursements of SF68,4000.1%10.9SF6 in new equipment delivered to customers7,5000.12%9.3SF6 returned to suppliers1000.58%0.6SF6 sent off site for recycling8000.71%5.7SF6 destroyed-1.00%0.0Emissions6008.3%49.9Emission Rate5%Switch manufacturer(i.e., low andmedium voltage)ValueRelativeUncertaintyAbsoluteUncertaintyAccuracy:5%Decreases in SF6 Inventory50002.9%145.8SF6 in containers at begin450000.24%106.1Inventory weights (incremental)100SF6 in containers at end400000.25%100.0acquisition weights (incremental)115Acquisitions of SF6480002.19%1,051.5acquisition-cylinders per scale5SF6 from producers470002.24%1,051.0dispursement weights, all but supplier (incremental)115SF6 returned with equipment05.00%-dispursement weights, return to supplier (incremental)10SF6 returned after recycling10003.54%35.4dispursements-cylinders per scale5Disbursements of SF6376000.3%106.2SF6 in new equipment delivered to customers370000.28%103.1Number of scales used by suppliers to OEMs5SF6 returned to suppliers1002.89%2.9SF6 sent off site for recycling5005.00%25.0SF6 destroyed05.00%-Emissions154006.9%1,066.9Emission Rate32%High Voltage OEM (138KV breakers)ValueUncertaintyAbsoluteUncertaintyDecreases in SF6 Inventory-30006.5%195.6SF6 in containers at begin75,0000.18%136.9SF6 in containers at end78,0000.18%139.6Acquisitions of SF612,0001.21%145.3SF6 from producers6,0002.24%134.2SF6 returned with equipment2,5002.24%55.9SF6 returned after recycling-5.00%0.0Disbursements of SF68,4000.6%54.4SF6 in new equipment delivered to customers7,5000.62%46.4SF6 returned to suppliers1002.89%2.9SF6 sent off site for recycling8003.54%28.3SF6 destroyed-5.00%0.0Emissions60041.6%249.7Emission Rate5%Switch manufacturer(i.e., low andmedium voltage)ValueRelativeUncertaintyAbsoluteUncertaintyAccuracy:1Decreases in SF6 Inventory50000.6%29.2SF6 in containers at begin450000.05%21.2Inventory weights (incremental)100SF6 in containers at end400000.05%20.0acquisition weights (incremental)115Acquisitions of SF6480000.38%182.9acquisition-cylinders per scale5SF6 from producers470000.39%182.8dispursement weights, all but supplier (incremental)115SF6 returned with equipment00.87%-dispursement weights, return to supplier (incremental)10SF6 returned after recycling10000.61%6.1dispursements-cylinders per scale5Disbursements of SF6376000.0%18.5SF6 in new equipment delivered to customers370000.05%17.9Number of scales used by suppliers to OEMs5SF6 returned to suppliers1000.50%0.5SF6 sent off site for recycling5000.87%4.3SF6 destroyed00.87%-Emissions154001.2%186.1Emission Rate32%High Voltage OEM (138KV breakers)ValueUncertaintyAbsoluteUncertaintyDecreases in SF6 Inventory-30001.3%39.1SF6 in containers at begin75,0000.04%27.4SF6 in containers at end78,0000.04%27.9Acquisitions of SF612,0000.21%25.3SF6 from producers6,0000.39%23.3SF6 returned with equipment2,5000.39%9.7SF6 returned after recycling-0.87%0.0Disbursements of SF68,4000.1%9.5SF6 in new equipment delivered to customers7,5000.11%8.1SF6 returned to suppliers1000.50%0.5SF6 sent off site for recycling8000.61%4.9SF6 destroyed-0.87%0.0Emissions6007.9%47.5Emission Rate5%Switch manufacturer(i.e., low andmedium voltage)ValueRelativeUncertaintyAbsoluteUncertaintyAccuracy:2Decreases in SF6 Inventory50001.2%58.3SF6 in containers at begin450000.09%42.4Inventory weights (incremental)100SF6 in containers at end400000.10%40.0acquisition weights (incremental)115Acquisitions of SF6480000.76%365.8acquisition-cylinders per scale5SF6 from producers470000.78%365.5dispursement weights, all but supplier (incremental)115SF6 returned with equipment01.74%-dispursement weights, return to supplier (incremental)10SF6 returned after recycling10001.23%12.3dispursements-cylinders per scale5Disbursements of SF6376000.1%36.9SF6 in new equipment delivered to customers370000.10%35.9Number of scales used by suppliers to OEMs5SF6 returned to suppliers1001.00%1.0SF6 sent off site for recycling5001.74%8.7SF6 destroyed01.74%-Emissions154002.4%372.2Emission Rate32%High Voltage OEM (138KV breakers)ValueUncertaintyAbsoluteUncertaintyDecreases in SF6 Inventory-30002.6%78.2SF6 in containers at begin75,0000.07%54.8SF6 in containers at end78,0000.07%55.9Acquisitions of SF612,0000.42%50.6SF6 from producers6,0000.78%46.7SF6 returned with equipment2,5000.78%19.4SF6 returned after recycling-1.74%0.0Disbursements of SF68,4000.2%18.9SF6 in new equipment delivered to customers7,5000.22%16.2SF6 returned to suppliers1001.00%1.0SF6 sent off site for recycling8001.23%9.8SF6 destroyed-1.74%0.0Emissions60015.8%95.0Emission Rate5%Switch manufacturer (i.e., low andmedium voltage)ValueRelativeUncertaintyAbsoluteUncertaintyAccuracy:3.300.01of330Decreases in SF6 Inventory50001.9%96.2SF6 in containers at begin450000.16%70.0Inventory weights (incremental)100SF6 in containers at end400000.17%66.0acquisition weights (incremental)115Acquisitions of SF6480001.26%603.5acquisition-cylinders per scale5SF6 from producers470001.28%603.2dispursement weights, all but supplier (incremental)115SF6 returned with equipment02.87%-dispursement weights, return to supplier (incremental)10SF6 returned after recycling10002.03%20.3dispursements-cylinders per scale5Disbursements of SF6376000.2%60.9SF6 in new equipment delivered to customers370000.16%59.2Number of scales used by suppliers to OEMs5SF6 returned to suppliers1001.66%1.7SF6 sent off site for recycling5002.87%14.3SF6 destroyed02.87%-Emissions154004.0%614.1Emission Rate32%High Voltage OEM (138KV breakers)ValueUncertaintyAbsoluteUncertaintyDecreases in SF6 Inventory-30004.3%129.1SF6 in containers at begin75,0000.12%90.4SF6 in containers at end78,0000.12%92.2Acquisitions of SF612,0000.70%83.4SF6 from producers6,0001.28%77.0SF6 returned with equipment2,5001.28%32.1SF6 returned after recycling-2.87%0.0Disbursements of SF68,4000.4%31.2SF6 in new equipment delivered to customers7,5000.36%26.6SF6 returned to suppliers1001.66%1.7SF6 sent off site for recycling8002.03%16.2SF6 destroyed-2.87%0.0Emissions60026.1%156.8Emission Rate5%