Mr. Orzechowski has over 25 years of experience performing and managing diverse environmental projects. Mr. Orzechowski's experience includes assessment, investigation, and remediation of electric utility properties including ash disposal facilities; assessment, investigation, and remediation industrial and commercial properties; Phase I and Phase II environmental assessments for various commercial and industrial properties to be sold and/or redeveloped; Underground Storage Tank (UST) investigations and closures. His experience also includes preparation of work plans, cleanup plans, site characterization plans, and final reports for regulatory review; supervision of field activities; and analysis of environmental data.

Mr. Buffalini has more than 35 years of experience in civil, environmental, and geotechnical projects. He has extensive experience in providing consulting services related to the permitting and construction of disposal facilities of municipal and industrial solid wastes and coal combustion residuals. He has performed siting studies for existing and greenfield facilities involving the evaluation of state and federal location restrictions, siting criteria, hydrogeologic conditions, access roads, and haul distances. He has prepared and directed numerous conceptual and detailed designs of disposal facilities including grading plans, composite liner and cap systems, leachate collection systems (bottom liner and perimeter trench), leachate transfer and storage systems, surface water management systems, gas extraction systems, and access roads, scales, and site buildings. Mr. Buffalini has prepared permit applications for expansions and closure of waste disposal facilities. Mr. Buffalini has been involved in numerous landfill construction projects. He has provided services as construction manager, prepared bidding documents with technical specifications and construction drawings, and provided construction quality assurance services for construction of composite liner systems, cap systems, leachate collection, transport and storage systems, surface water channels and culverts, sedimentation basins, and gas extraction systems. His work related to coal combustion residuals (CCR) includes the design and permitting for the expansion and closure of landfills and surface impoundments. His experience includes siting studies, feasibility evaluations, conceptual and detailed designs, permitting, and construction documents for the expansion and closure of CCR facilities. Mr. Buffalini has also provided services related to USEPA CCR Rule compliance for landfills and surface impoundments.

Mr. Walsh has 27 years of experience in conducting and managing large scale environmental projects. These projects have included environmental permitting, environmental assessments, site investigations, remedial designs, and large-scale hydrogeologic assessments, including computer analysis of aquifer test data and digital computer modeling. He is also experienced in the design and installation of monitoring well networks and various types of remediation systems. He has experience conducting and managing environmental assessments at industrial facilities where coal combustion residuals, organic solvents, coatings, resins, electroplating wastes, primary metals manufacturing wastes, PCBs, asbestos, coal tar and wood treating chemicals were manufactured or disposed. He also has extensive experience in Phase I and Phase II environmental site assessments, as well as underground storage tank investigations, removal and remediation.