Learn the Issues
-
In a computer-controlled in-line blending operation, adjustments to blending volumes and other blending parameters are made on an ongoing basis to keep the gasoline being blended on-spec. Normally, these adjustments are made automatically by a computer. However, some aspects of the blending operation must be placed in a manual mode when instrument problems arise. The operator is able to enter values (transfer volumes, blend volumes) in the case of such a manual mode operation. The computer records when manually-entered adjustments are made. Is this acceptable data control to the EPA?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. It would seem to be appropriate for the software to indicate when data are manually entered, who entered the data and when it was entered. This information should be recorded with the file for the batch and available for…
-
Guidelines for Exposure Assessment
1992 final guidelines for exposure assessment.
-
Recommended Use of Body Weight 3/4 as the Default Method in Derivation of the Oral Reference Dose
This document promotes the use of BW3/4 as a default method to convert data between species for both categories of endpoints.
-
Types of Septic Systems
most common types of septic systems in use.
-
Grand Rapids Vapor Intrusion Maps
Maps of vapor intrusion sites in Grand Rapids
-
A company wishes to blend RFG containing ethanol with RFG containing an ether, such as MTBE. May this blending occur during the VOC-controlled season? During the non-VOC-controlled season?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. Under § 80.78(a)(8), and as explained in the answer to Prohibitions Question 1 in the September 26, 1994 Question and Answer Document, RFG may not contain a mixture of ethanol and any other oxygenate during the VOC control season…
-
2011 Version 6.2 Technical Support Document
This TSD describes how the emission inventories were prepared for air quality modeling for the years 2011, 2017, and 2025 using the 2011, version 6.2 emissions modeling platform, which is based on the 2011 National Emissions Inventory, Version 2.
-
National Drinking Water Advisory Council Meeting Summary, December 1-2, 2021
Consumer Confidence Report Rule Revision Working Group agenda and meeting materials for the NDWAC October 12, 2021 meeting
-
NDWAC April 19, 2022 meeting agenda and materials
Consumer Confidence Report Rule Revision Working Group agenda and meeting materials for the NDWAC October 12, 2021 meeting
-
NDWAC December 1-2, 2021 meeting agenda and materials
Consumer Confidence Report Rule Revision Working Group agenda and meeting materials for the NDWAC October 12, 2021 meeting
-
Parker Street Waste Site
EPA conducted sampling and other response actions at Parker Street Waste Site according to its authority under Secton 104 of the Comprehensive Environmental Response, Compensaton, and Liability Act (CERCLA).
-
Jump in? Not So Fast! Impact of Cyanobacteria Blooms on Recreational Waters
Summer is fast approaching and with the warm weather it is time to hit the water! Clean water and access to safe waterbodies play an important role in our communities.
-
Enhancing Coordination and Communication with States on Review and Approval of Aquifer Exemption Requests
The memorandum in the link provided is for Underground Injection Control (UIC) program managers and is intended to promote a consistent and predictable process for the review of aquifer exemption requests under the Safe Drinking Water Act (SDWA).
-
Polychlorinated Biphenyl (PCB)-Containing Fluorescent Light Ballasts (FLBs) in School Buildings
PCB-Containing Fluorescent Light Ballasts (FLBs) in School Buildings
A Guide for School Administrators, Building Owners and Managers and Maintenance Personnel -
Reallotment of Fiscal Year 2022 (2nd Round) and Fiscal Year 2023 CWSRF IUA EC Memo
Reallotment of Fiscal Year 2022 (2nd Round) and Fiscal Year 2023 Infrastructure Investment and Jobs Act Clean Water State Revolving Fund Emerging Contaminants Funds
-
Outer Continental Shelf Air Permits
Provides information and links to EPA's Outer Continental Shelf air permitting requirements.
-
San Fernando Valley Superfund Sites Story Map
EPA Region 9's StoryMap collection describes the four San Fernando Valley Superfund site histories and upcoming remedial activities.
-
ICYMI: Leaders Thank EPA for Over $21 Million in Brownfields Grants to Communities in Mid-Atlantic Region
Grants will help 30 recipients assess or cleanup contaminated sites across three states
EPA News Release: ICYMI: Leaders Thank EPA for Over $21 Million in Brownfields Grants to Communities in Mid-Atlantic Region
-
RadTown Radiation Protection Activity 1: History of Radiation Protection
When did humans discover radioactivity, and how have we used it since? Teach your students about how we have protected people from ionizing radiation throughout history with this free classroom activity.
-
EPA Region 8, Memo on Desktop Printer Ink Cartridges Policy & Voluntary Printer Turn-in
This memo requests EPA Region 8 users to voluntarily turn-in their desktop printers and notifies users of the Region 8 policy to not provide maintenance or ink and toner cartridges for desktop printers.