. Remediation Design & Construction Effective site remediation and restoration isn't just a pointless use of your resources - it reduces your environmental liabilities and adds (or restores) value to your property or facility. AVANT's multidisciplinary restoration team of engineers, hydrogeologists, and risk-assessment specialists work together to design and implement contamination remediations for your challenging environmental issues and to meet regulatory goals economically. The remediation-design process proceeds through a series of steps designed to assist in selecting the most effective and economical approach and implementing it efficiently. These steps are: Site investigation and risk assessment to establish site-specific cleanup objectives Evaluating and selecting an appropriate remediation technology Designing the remediation Managing the construction of the remediation Evaluating the remediation system's performance, and Ongoing monitoring, operation, and regulatory compliance Site closure AVANT's site investigations and risk assessments are described under the Hydrogeologic and Contamination Investigations and Health-Based Risk Assessments service links. Remediation Selection and Design. AVANT evaluates a range of possible remediation methods for each contaminated site with one overall goal in mind - to select a remedy that works at the least cost to our clients. The choice of an efficient, constructible, cost-effective remedial method is based on a sound characterization of the site, its contaminants and their characteristics, and the exposure risks they pose. AVANT's wide-ranging expertise allows us to choose from a comprehensive battery of remediation technologies, such as: Monitored natural contaminant attenuation Free-product recovery Bioremediation (oxygen enhancement, bioventing, and biosparging) Air sparging (air and ozone) and soil-vapor extraction Groundwater collection and treatment Phytoremediation (remediation using vegetation systems) Removal and disposal Reactive barriers and slurry walls Site capping Chemical oxidation Arid treatment Constructed wetlands In many cases, the most effective remedial approach is a combination of two or more of these methods. Remediation Implementation and Construction Management. AVANT's scientists and engineers participate in and manage the implementation of the remedial design, including construction and installation activities and the coordination of subcontractors. Our construction-management services include: Obtaining construction, emission, and discharge permits Preparing plans, specifications, and bid documents for contractors Developing quality-assurance/quality-control plans Preparing design reports for clients and regulatory agencies On-site construction monitoring. Remediation Performance Evaluation. AVANT's scientists and field staff, backed by a wide variety of field instruments and equipment, perform many on-site activities aimed at evaluating system and remediation performance, including: Air, soil, and water (groundwater, surface water, influent, and effluent) sampling Oxygen, carbon dioxide, and organic vapor monitoring Water-treatment system monitoring Data management and statistical analyses Soil-gas surveys Monitoring-well installation and sampling Direct-push sampling of soil, water, and soil gas Other Services for Manufacturers Other Services for Manufacturers Environmental compliance services Water Resource Design and Management Sanitary and Storm Sewer (Conveyance) Design Industrial wastewater treatment and pretreatment Engineering and construction services Phase I and II environmental site assessments Environmental monitoring UST investigations, closures, & remediations State voluntary remediation assistance Wetland delineation & hydrology Operation & maintenance of soil & ground-water remediation systems Health-based risk assessments Hydrogeologic & contamination investigations Asbestos and lead-paint inspections .

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