Science & Technology
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Certification Materials for Small Nonroad Spark-Ignition (NRSI) Engines/Equipment
Use this template for small SI certification in EV-CIS.
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Certification Materials for Nonroad Spark-Ignition (NRSI) Evaporative Components/Equipment
Use these files for nonroad evaporative certification in EV-CIS.
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Heavy-Duty Vehicle Certification Tutorial
Covers certification and compliance regulations for HD vehicles and engines; EV-CIS registration process, CDX roles, GEM, input data set, modeling data, tire data, certification documents, warranty, certification requests, annual compliance reporting, ABT.
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Report Forms and Guidance for Defects and Recalls under 40 CFR Part 85, Subparts S and T
Forms and step-by-step guidance as part of the compliance reporting process for defects and recalls under 40 CFR Part 85, subparts S and T.
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Evaluation of the Status of American Recovery and Reinvestment Act-Funded Brownfield Site Cleanups
[Paste the description here.]
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TSCA Chemical Data Reporting Fact Sheet: Non-Isolated Intermediates
This fact sheet provides information on the reporting exemption applicable to non-isolated intermediate chemical substances for purposes of the Chemical Data Reporting (CDR) rule (40 CFR 711).
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TSCA Section 21
TSCA Section 21 regulations collect data for use in conducting assessment of potential chemical risk are described.
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Reporting a TSCA Chemical Substantial Risk Notice
Section 8(e) states that Any person who manufactures a chemical substance and obtains information that the chemical is harmful to health or the environment shall inform the EPA.
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Regulation of Chemicals under Section 6(a) of the Toxic Substances Control Act
EPA's existing chemicals programs address pollution prevention, risk assessment, hazard and exposure assessment and/or characterization, and risk management for chemicals substances in commercial use.
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PRZM3 version 3.12 beta
Page on version 3.12 (beta) of PRZM one-dimensional, finite-difference model that accounts for pesticide and nitrogen fate in the crop root zone. February 1998
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PRZM3 version 3.12.2
Page on version 3.12.2 of PRZM, a one-dimensional, finite-difference model that accounts for pesticide and nitrogen fate in the crop root zone. Released May 2005
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PRZM2 version 2.3
Page on version 2.3 of PRZM, a one-dimensional, finite-difference model that accounts for pesticide and nitrogen fate in the crop root zone. Released May 1996
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PRZM2 version 1.02
Page on version 1.02 of PRZM, a one-dimensional, finite-difference model that accounts for pesticide and nitrogen fate in the crop root zone. Released February 1993
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PRZM3 version 3.12.1
Page on version 3.12.1 of PRZM, a one-dimensional, finite-difference model that accounts for pesticide and nitrogen fate in the crop root zone. August 2003
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PRZM3 Version 3.12.3
PRZM on version 3.12.3 of PRZM, a one-dimensional, finite-difference model that accounts for pesticide and nitrogen fate in the crop root zone. May 2006
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PRZM2 version 2.00
Page on version 2.00 of PRZM, a one-dimensional, finite-difference model that accounts for pesticide and nitrogen fate in the crop root zone. Released October 1994
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PEST Release Notes
Release notes for the PEST (Parameter ESTimation) software, a model-independent parameter estimation package
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EFDC Release Notes
Release notes for the Environmental Fluid Dynamics Code (EFDC) multifunctional surface water modeling system software
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PRZM2 version 1.00
Page on version 1.00 of PRZM, a one-dimensional, finite-difference model that accounts for pesticide and nitrogen fate in the crop root zone. Released October 1992
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Coastal Generalized Ecosystem Model (CGEM)
CGEM is an open-source model designed for researchers and managers that need a flexible water quality model with multiple formulation options that can be adapted to a range of coastal and freshwater ecosystems.