Concepts and their limits
For Section 608 ODS leak repair, a full charge of at least 50 lb and an annual leak rate exceeding the applicable category trigger are relevant; category triggers are 10%,20%,30%. This Section 608 leak-repair threshold applies to at least 50 lb full charge of ODS and a rate that exceeds, not merely equals, the category trigger. When a learning problem directly supplies total refrigerant lost over a full year and full charge, its annual loss fraction is loss divided by full charge. This is not a substitute for all regulatory leak-rate calculation methods. For an applicable ODS leak above its trigger, the ordinary repair period is 30 days; a required industrial-process shutdown can use 120 days. A retrofit/retirement plan is developed within 30 days and normally completed within 1 year.
Worked decisions
An appliance normally contains 100 lb of ozone-depleting refrigerant and is used for comfort cooling. Which annual trigger rate belongs to that category? The decision is 10%. The stated ODS appliance contains 100 lb, so it meets the 50 lb size condition. The use is comfort cooling; EPA identifies 10 percent as the applicable annual trigger for that category. The other percentages belong to different category assumptions. A comfort-cooling appliance has an ODS full charge of 60 lb and an annual leak rate of 12%. Does it exceed the 10% category trigger? The decision is Yes; 12% is above the trigger. This Section 608 leak-repair threshold applies to at least 50 lb full charge of ODS and a rate that exceeds, not merely equals, the category trigger. For a simplified full-year learning model, an ODS appliance's full charge is 100 lb and its measured annual loss is 12 lb. What fraction of full charge was lost? The decision is 12%. Divide the supplied annual loss 12 by full charge 100, then multiply by 100. Use the official prescribed method for actual compliance calculations. An applicable ODS comfort-cooling appliance exceeds its leak trigger. No extension condition is stated. What is the ordinary repair deadline after discovery? The decision is 30 days. For an applicable ODS leak above its trigger, the ordinary repair period is 30 days; a required industrial-process shutdown can use 120 days. A retrofit/retirement plan is developed within 30 days and normally completed within 1 year.
Contrasts that change the decision
An appliance normally contains 100 lb of ozone-depleting refrigerant and is used for commercial refrigeration. Which annual trigger rate belongs to that category? Here the supported answer is 20%. The stated ODS appliance contains 100 lb, so it meets the 50 lb size condition. The use is commercial refrigeration; EPA identifies 20 percent as the applicable annual trigger for that category. The other percentages belong to different category assumptions. A commercial refrigeration appliance has an ODS full charge of 100 lb and a 20% annual leak rate. Which comparison is correct? Here the supported answer is The rate equals, rather than exceeds, its 20% trigger. This Section 608 leak-repair threshold applies to at least 50 lb full charge of ODS and a rate that exceeds, not merely equals, the category trigger. For a simplified full-year learning model, an ODS appliance's full charge is 200 lb and its measured annual loss is 50 lb. What fraction of full charge was lost? Here the supported answer is 25%. Divide the supplied annual loss 50 by full charge 200, then multiply by 100. Use the official prescribed method for actual compliance calculations. Repairing an applicable industrial-process refrigeration leak requires a process shutdown. Which substituted repair period is identified by EPA? Here the supported answer is 120 days. For an applicable ODS leak above its trigger, the ordinary repair period is 30 days; a required industrial-process shutdown can use 120 days. A retrofit/retirement plan is developed within 30 days and normally completed within 1 year.
Transfer and self-check
An 80 lb ODS comfort-cooling appliance loses 12 lb over a supplied full-year model. Calculate the loss fraction and compare the trigger.12÷80×100=15 percent, which is above the 10 percent comfort-cooling trigger; this simplified exercise does not replace the prescribed field calculation method.
An appliance normally contains 100 lb of ozone-depleting refrigerant and is used for comfort cooling. Which annual trigger rate belongs to that category?
- The relevant stated condition is: An appliance normally contains 100 lb of ozone-depleting refrigerant and is used for comfort cooling.
- Apply the relevant source rule. The stated ODS appliance contains 100 lb, so it meets the 50 lb size condition. The use is comfort cooling; EPA identifies 10 percent as the applicable annual trigger for that category. The other percentages belong to different category assumptions.
- This supports “10%”. The alternative “5%” uses a different condition or conclusion;the applicable rule above explains why it does not answer this case.
Compare the other answer choices
This choice (5%) does not fit the stated conditions. For Section 608 ODS leak repair, a full charge of at least 50 lb and an annual leak rate exceeding the applicable category trigger are relevant; category triggers are 10%,20%,30%.
This choice (20%) does not fit the stated conditions. For Section 608 ODS leak repair, a full charge of at least 50 lb and an annual leak rate exceeding the applicable category trigger are relevant; category triggers are 10%,20%,30%.
This choice (30%) does not fit the stated conditions. For Section 608 ODS leak repair, a full charge of at least 50 lb and an annual leak rate exceeding the applicable category trigger are relevant; category triggers are 10%,20%,30%.
Try it, then explain it.
Complete a short set without looking at the example. After each answer, explain which evidence or rule supports your decision and why the alternatives do not fit.
Sources & authorship
Original Slope explanations and examples. References support the concepts; they are not the source of copied questions. Independent educator review is pending.
Epa Leaks