Learn the Issues
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Lesson 2: End of Lesson
You've completed Lesson 2, Quick Tour of the Final Rule, of CROMERR 101.
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Cleanups in My Community Web Map Service and More
This bridge page links to the CIMC Web Service and provides access to the latest GeoDatabase.
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Lesson 6: End of Lesson
You've completed Lesson 6 of CROMERR 101, Using the Checklist to Work through System Requirements!
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Lesson 4: End of Lesson
You've completed Lesson 4 of CROMERR 101, The EPA Review and Approval Process Under Part 3!
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Lesson 6: Using the Checklist to Work through System Requirements
Lesson 6 describes how these same requirements are presented in the CROMERR System Checklist (which was introduced in Lesson 4). You may want to refer to the checklist as you step through this lesson.
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Lesson 3: End of Lesson
You've completed Lesson 3 of CROMERR 101, Application Requirements!
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Fact Sheet for the 2026 Interim Guidance on the Destruction and Disposal of PFAS
This 2026 update of the U.S. Environmental Protection Agency (EPA) interim guidance presents currently available information on the destruction and disposal of perfluoroalkyl and polyfluoroalkyl substances (PFAS) and PFAS-containing materials.
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EPA Small Business Tools and Resources for Subcontracting Opportunities
Page for small businesses solutions and opportunities.
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Notice for Lead Action Level Exceedance at SIERRA Public Water System in Santa Fe County, NM
Recent drinking water samples taken by the SIERRA Public Water System (PWS ID: NM3502026) located in Santa Fe County, New Mexico, found elevated levels of lead in some homes and/or buildings.
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What are the differences between the summer and winter models and what is their justification?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. The equations, extrapolations, and normal-to-high emitter ratios remain the same when one switches from the summer version of the Complex Model to the winter version. However, four changes do take place. First, the baseline fuel is changed from the…
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What is the affect of a "clean" attestation and/or regulatory audit on subsequent compliance violations identified?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. An attestation engagement report for the refinery or importer that indicates no discrepancies has no bearing on a violation by the refiner or importer that may be determined by EPA. With regard to the CPA or CIA who conducted…
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What is the responsibility of the independent lab in determining whether a tank of RFG meets the definition of "batch," i.e., is homogeneous with regard to the RFG properties?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. The independent sampling and testing provisions require the independent lab to collect a separate sample from each batch of RFG. "Batch of reformulated gasoline" is defined at § 80.2(gg) as "a quantity of reformulated gasoline which is homogeneous with…
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When measuring total aromatics using a GC-MS, can either method A or method B be used, or must both be used?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. Either method A or method B may be used. (7/1/94) This question and answer was posted at Consolidated List of Reformulated Gasoline and Anti-Dumping Questions and Answers: July 1, 1994 through November 10, 1997 (pdf) (333 pp, 18.17 MB…
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When a portion of a batch is shipped to a customer while the batch is still being blended, assuming an approved in-line blending system, does the batch ID number for the shipping documents pertain to the portion shipped or to the whole batch?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. The batch identification number is assigned to the total batch volume as is represented by the composite sample. Section 80.77 does not require refiners to include the batch identification number or total batch volume on the product transfer documents…
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When no oxygenates are added to gasoline, must an oxygenate analysis be performed?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. Under the anti-dumping requirements, the refiner and importer is required to determine the properties of each batch of gasoline required for determining compliance with the applicable standards. Under the simple model, an analysis for oxygenates would clearly be unnecessary…
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When performing simple and complex model calculations, what number of decimal places need to be entered for each of the gasoline properties?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. Fuel parameters should be rounded to the following decimal places: RVP 2 decimal places Olefins 1 decimal place Benzene 2 decimal places E200 1 decimal place Sulfer 0 decimal places E300 1 decimal place Aromatics 1 decimal place (7/1/94)…
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When presenting the gasoline pool data (EPA Table 6), is it ok to present just summer, winter, and annual average data, rather than monthly data?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. Yes, it is acceptable to present seasonal gasoline pool data. The format of this table will depend on the data available. (7/1/94) This question and answer was posted at Consolidated List of Reformulated Gasoline and Anti-Dumping Questions and Answers…
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When replacing conventional gasoline with RFG at a terminal, is it considered blending if the RFG is mixed with conventional bottoms?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. During the transition period prior to December 1, 1994, certified RFG may be put into tanks that contain conventional gasoline bottoms, as long as the tank is essentially filled with certified RFG gasoline on December 1, 1994, and the…
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When preparing samples for oxygen analysis according to section 80.46(g), isn't there a risk of losing volatile components when allowing samples to come to room temperature?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. The fractional loss during "limited" sample handling is not measurable for these properties. (7/1/94) This question and answer was posted at Consolidated List of Reformulated Gasoline and Anti-Dumping Questions and Answers: July 1, 1994 through November 10, 1997 (pdf)…
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Who is required to register for the Reformulated Gasoline and Anti-dumping Program?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. Refiners and importers of conventional gasoline, reformulated gasoline or RBOB and oxygenate blenders producing reformulated gasoline by blending RBOB with oxygenates must register with EPA prior to producing or importing such products. Independent laboratories must register prior to being…