4.1 Purpose-This guide provides a process for identifying, prioritizing, selecting, implementing, documenting, and reporting activities to reduce the environmental footprint of a cleanup as defined by the following core elements.

4.1.1 Minimize Total Energy Use and Maximize Use of Renewable Energy-Reducing total energy use while also identifying means to increase the use of renewable energies throughout the cleanup. Possible methods may include reducing energy use, using energy efficient equipment, using on-site renewable resources (for example, wind, solar), and purchasing commercial energy from renewable resources.

4.1.2 Minimize Air Pollutants and Greenhouse Gas Emissions-Reducing total air emissions, including emissions of air pollutants and greenhouse gases, throughout the cleanup. Possible methods may include minimizing the generation and transport of airborne contaminants and dust, using efficient emitting equipment (for example, vehicles and heavy equipment), using advanced emission controls, and using cleaner fuels or hybrid technologies.

4.1.3 Minimize Water Use and Impacts to Water Resources-Minimizing the use of water and impacts to water resources throughout the cleanup. Possible methods may include conserving water use in cleanup processes, using water efficient products, capturing and reclaiming water for reuse, revegetating with water efficient plants, and employing traditional BMPs for storm water, erosion, and sedimentation control.

4.1.4 Reduce, Reuse, and Recycle Materials and Waste-Minimizing the use of virgin materials and generation of waste throughout the cleanup as well as maximizing the use of recycled materials. Possible methods may include using recycled and locally generated materials, reusing waste materials (for example, concrete made with coal combustion products), diverting construction and demolition debris from disposal by recycling recovered resources, and using rapidly renewable materials or certified wood products.

4.1.5 Protect Land and Ecosystems-Reducing impacts to the land and ecosystem services throughout the cleanup. Possible methods may include minimizing the area requiring activity and use limitations by the removal or destruction of contaminants; identifying the presence of and limiting the disturbance of mature, non-invasive, native vegetation, surface hydrology, soils, and habitats in the cleanup area; and minimizing noise and light disturbance.

4.2 Professional Experience-This guide requires the skills of a lead environmental professional and project team, as appropriate, to evaluate and apply greener cleanup practices, processes, and technologies to each cleanup phase while meeting cleanup program-specific requirements and ensuring protection of human health and the environment. This guide presumes the lead environmental professional is knowledgeable in cleanup practices and experienced in identifying and satisfying applicable statutory or regulatory cleanup requirements and expectations.

4.3 Uncertainty in Greener Cleanups-Professional judgment, interpretation, and some uncertainty are inherent in the greener cleanups process even when decisions are based upon objective scientific principles and accepted industry practices. Although such uncertainties are inevitable, they typically will not detract from the ability of the user to achieve meaningful improvements in the site cleanup.

4.4 Regulatory Context-The user is responsible for determining the regulatory context, and associated constraints and obligations for each site, and shall comply with all applicable laws and regulations, including CERCLA, RCRA, TSCA, and other environmental laws.

4.4.1 The user shall comply with health and safety requirements under the Occupational Safety and Health Act and parallel state statutes and regulations.

4.4.2 This guide may not be appropriate for certain cleanups, such as some emergency response actions, that do not allow sufficient time for its application.

4.4.3 Implementation of this guide may involve additional costs or require changes to the cleanup schedule; however, its implementation should not unduly delay a cleanup or result in the imposition of unreasonable costs.

4.5 Process Implementation-This guide may be initiated at any time during any cleanup phase, including during: site assessment; remedy selection; remedy design/implementation; operation, maintenance, and monitoring; and remedy optimization.

4.6 Process Overview-At initiation, the user should review Section 3, Terminology, and then proceed to Section 4, Significance and Use, and Section 5, Planning and Scoping. Users who plan to implement the BMP process only, should proceed to Section 6. Users who plan to employ a quantitative evaluation should proceed to Section 7, prior to, or during implementing Section 6. Section 8 describes documentation and reporting.

4.6.1 Section 5, Planning and Scoping, describes information the user should collect and consider to assist in making several site-specific, user-defined decisions for implementing the guide.

4.6.2 Section 6, BMP Process, describes steps for the user to identify, prioritize, select, implement, and document BMPs.

4.6.3 Section 7, Quantitative Evaluation, describes a process for implementing a footprint analysis or LCA. Section 7 is not designed to instruct the user on how to perform footprint analysis or LCA. It presumes that a member of the project team is knowledgeable in a quantitative evaluation approach applicable to the site.

4.6.4 Section 8 describes recommended documentation and reporting on the implementation of the guide.

4.6.5 Section 9 provides keywords for indexing and searching purposes.

4.6.6 This guide includes four appendices.

4.6.6.1 Appendix X1, Supporting Documentation, provides supplemental reference material for the user to consider when implementing this guide.

4.6.6.2 Appendix X2, Technical Summary Form, is a template of the reporting expectations described in Section 8. This includes general information about the site (for example, location), process steps, and greener cleanup outcomes from implementing the guide. The user may employ this template or another applicable format for reporting results from implementing this guide. A writeable pdf file of the Technical Summary Form is available as an adjunct.5

4.6.6.3 Appendix X3, Greener Cleanup BMP Table, supports Section 6 by providing a comprehensive list of BMPs to assist the user. Standard best management practices for cleanup (that is, those related to engineering and technology, but unrelated to reducing environmental footprints) are generally not included in the Greener Cleanup BMP Table. An Excel-based file of the Greener Cleanup BMP Table is available as an adjunct.6

4.6.6.4 Appendix X4, Supplemental Information for a Quantitative Evaluation, supports Section 7 by providing general information on footprint analysis and LCA, including their uses, similarities, and differences.