PROFESSIONAL EXPERIENCE

Mr. Tweddale has been an engineering and environmental consultant since 1987. His primary areas of technical expertise include regulatory compliance, energy management, site investigation and remediation, brownfield site redevelopment, real estate due diligence, legal support, risk reduction, regulatory compliance, litigation/mediation, and agency negotiations. His primary project role is to prioritize and clarify objectives with the client, establish the technical direction with the team, communicate findings and risk/cost implications in a succinct and timely manner, and act as the primary liaison with legal counsel, financiers, and regulatory agencies, as needed.

Energy and Environmental Services

• Helped a small business obtain a $6,800 Wisconsin tax refund and save $8,800 annually by analyzing three years of electric and natural gas data and documenting the tax-exempt energy consumed in manufacturing. Identified several projects to help the manufacturer reduce energy costs in the future, including a review of inconsistencies in the utility rate structure and the boiler maintenance schedule.
• Identified steam losses, compressed air leaks, inefficient motors, and outdated process controls as the primary energy-saving opportunities at four large consumer goods processing facilities in the southeastern United States. As part of detailed environmental, health and safety audits, prioritized regulatory compliance risks and recommended capital budgeting items for systemic continual improvement.
• Determined that the 2009 USEPA Greenhouse Gas (GHG) Mandatory Reporting Rule for General Stationary Combustion Sources does not apply to the 30 largest facilities owned by a major U.S. processing company, by analyzing fuel consumption records, tabulating input ratings by equipment type, and estimating the total GHG emissions. Also summarized potentially applicable GHG regulations from 18 states.
• Verified compliance with OSHA regulations at a small, primary-metal manufacturer by sampling indoor air quality following a process change.

Legal Support, Risk Reduction, and Regulatory Compliance

• Reviewed real estate appraisal reports, background environmental data, and government records to prepare an expert witness report on behalf of a small business owner as part of an eminent domain and property valuation case in Wisconsin. The report concluded that the property’s current use and value were not diminished by historic spills, and that the “taking” of real estate should reflect fair market value.
• Conducted strategic environmental health & safety audits at vendor and supplier sites across the United States, focusing on air quality, waste handling, and compliance with wastewater and stormwater permit conditions, including verification from local and state government representatives on behalf of a Fortune 500 company seeking to reduce public relations and litigation risk.
• Reviewed the technical and administrative work of another environmental consultant, prepared a summary of opinions regarding professional negligence and malpractice, and provided expert witness testimony during depositions on behalf of a Fortune 500 company seeking to reduce public relations and litigation risk.

Site Investigation and Remediation

• Developed a cost-effective investigation and remediation strategy for a 12-acre brownfield site, working with the Chicago Department of Environment and implementing the Illinois Tiered Approach to Cleanup Objectives (TACO) process. Conducted a health risk assessment and teamed with the architect and general contractor to reduce the off-site disposal of Special Waste containing lead, arsenic, and polynuclear aromatic hydrocarbons. Served as the client representative during demolition and removal of a transformer building with polychlorinated biphenyls (PCBs), and asbestos abatement from utility tunnels.
• Closed a commingled petroleum and chlorinated solvent case in Rock County, Wisconsin, with regulatory oversight from the Wisconsin Department of Natural Resources (WDNR) Remediation and Redevelopment Program, WDNR Drinking Water Bureau, Wisconsin Department of Commerce (Commerce) Petroleum Environmental Cleanup Fund Award (PECFA) Bureau, and the Wisconsin Department of Justice (DOJ). Designed and supervised installation of a replacement water supply well, maximized PECFA cost reimbursement, and minimized DOJ forfeitures during enforcement negotiations.

Real Estate Due Diligence

• Compiled seven years of previous Environmental Site Assessment (ESA) data, and developed a work scope to address Phase 1 and Phase 2 ESA data gaps, as part of due diligence for an industrial laundry facility in Chicago, Illinois. Within a tight real estate closing schedule, developed detailed cost estimates for environmental and geotechnical work to help the client negotiate a favorable purchase agreement and obtain cost-cap insurance.
• Conducted all appropriate inquiry (AAI) Phase 1 ESAs for clients acquiring or expanding businesses throughout North America and in Puerto Rico. In addition to the American Society for Testing and Materials (ASTM) criteria, evaluated business concerns such as indoor air quality, wetlands, floodplains, earthquake potential, radon, asbestos, drinking water, and geotechnical/soil conditions.
• Summarized acquisition-related capital and operating costs using information obtained from rapid-turn Phase 2 ESAs and regulatory compliance audits at active manufacturing sites.

Contaminant Fate and Transport

• Researched the history of chemical releases at a Dane County solvent reclamation facility located in a complex geologic setting with glacial deposits overlying fractured bedrock. Reviewed data from decades of investigation and remediation work. Prepared an affidavit regarding the timing and nature of the releases, and provided expert witness testimony in deposition.
• Collected and plotted groundwater data from an adjacent petroleum release site for an active gas station site in a fractured bedrock setting, to illustrate to the state agency that the release at the subject property could not have caused the observed plume concentrations, resulting in closure of the subject site.

Agency and Public Interaction

• Negotiated a reduced site investigation work scope for a chemical company in Wisconsin by addressing WDNR concerns regarding area bedrock water supply wells and correcting errors in the historic files. Re-focused the project objectives on case closure.
• Coordinated efforts to locate and sample nearby private water wells and provide temporary, alternative water supplies to residents on behalf of the insured following a warehouse fire at a chemical distributer.

  PUBLICATIONS AND PRESENTATIONS