Air Conditioning - Boilers - Chillers - Heating and Refrigeration.

Our team of experts (Doc Mitchell & Larry Dunn P.E) at A - B - C - H and R hold more licenses, certifications and degrees in fields directly related to all phases of Air Conditioning, Asbestos, HVAC, Boilers, Refrigeration, Pressure Piping and Mechanical Engineering than any other team of HVAC and Refrigeration experts in the United States, Canada & South America.

In addition to their outstanding combined credentials they have over 70 years experience in all phases of Asbestos, Air Conditioning, Boiler, Chillers, Heating and Refrigeration systems. This includes trouble shooting, installation, service, repair, rebuilding, factory warranty service and design from the smallest of laboratory equipment to the largest systems in the world.

A - B - C - H and R has a fully equipped laboratory for testing and dissection of any type of equipment, as well as a large high security storage warehouse for the safe and secure storage of evidence.

A - B - C - H and R also has a fully stocked tool trailer to allow us to bring everything that is needed to perform on-site testing and dissection.

Bison is a multi-disciplined engineering firm specializing in failure analysis, forensic engineering and fire sciences with a team of P.E.'s who have performed thousands of forensic assignments including in excess of 1,000 fuel gas investigations.

Legal professionals turn to Bison to scientifically conduct investigations to determine the cause of destructive events. Forensic Engineers provide expert testimony and consultation. Investigations include explosions, fires, carbon monoxide incidents, electrical fires and failures, structural failures, mechanical failures, accident reconstruction, specialized testing, and courtroom presentations:

Fuel Gas Incidents: Fire and Explosion Causation; Propane Explosions, Natural Gas Explosion, Gas Delivery Systems; Carbon Monoxide Testing and Evaluation, Production and Migration Investigations; Plant & Pipeline, Piping Evaluation; Operational Analysis; Appliance Evaluation; Code Compliance; Soil Gas Migration; Vapor Dispersion

Fire Investigation and Explosion Analysis: Cause and Origin, Scene Documentation; Collection of Evidence; Certified Fire Investigator

Electrical Engineering: Electrically Related Fires, Electrical Service and Wiring Failures, Production Facility Service and Controls for Chemical, Petroleum, and Distribution Facilities, Electrical Contacts, Electrocutions; Lightning Strikes

Mechanical Engineering: Equipment Design and Operation; High-Pressure Oilfield Equipment; Pump Design and Operation; HVAC Systems; High and Low-Pressure Seals; Plastic Part Design and Manufacture, Industrial Equipment

Accident Reconstruction: Accident Sequence Reconstruction; Speed, Time and Distance Calculations; Crush Damage; Braking; Steering and Mechanical Analysis, including Tires; Electrical System / Electronic Failures; Mechanical and Fuel Systems; Airbag and Seatbelt Fatalities/Injuries; Staged Vehicle Impact

Failure Analysis: Industrial Equipment, Vehicle Impacts, Airbags and Seat Belts; Elevator Failures; Helmet and other Protective Equipment Failures; Infant Crib Design Inadequacies; Carbon Monoxide Investigations, Crane Failures, etc.

Metallurgical Engineering: Metal Fatigue of Gas Compressor Components; Electrical Contact Evaluations; Cracking of Structural Plastics; Chemical Analysis; Corrosion & Stress Evaluation and Analysis; SEM Analysis; Electron/Optical Microscopy; X-ray Examination

Bison's clients argue their cases with confidence, secure in the knowledge that their claims are based on unbiased, scientific data.

John is an industry leader in Building Systems Engineering including, Security, Building Automation Systems, Fire Alarm Systems, Intelligent Building Concepts and Commissioining. He has worked on some of the most prestigious facilities in the world including the Americas, Europe, Middle East, Russia, India and Southeast Asia.

Security Expertise:

Access Control

CCTV Surveillance

Emergency Communications

Operations

Risk Assessments

Building Automation Expertise:

Energy Management

HVAC Controls

Operations

MEP Commissioning

Other Systems Expertise:

Fire Alarm

Telecommunication

Intelligent Buildings

Jason R. Babcock, PhD - Chemistry and Materials Consulting

Dr. Babcock has formal training in chemistry, physics, mathematics, and materials property analysis. He has specialized throughout his career in the role that materials contribute to the limitations and failures of products and systems. He has substantial experience in a variety of materials, corrosion, measurement instrumentation, materials testing, materials processing and processing equipment, chemistry, R&D practices, and project management. Dr. Babcock has a broad General Chemistry knowledge that is invaluable to understanding the interaction of materials on a molecular level. He has extensive experience designing and building experimental apparatus and performing analytical testing of a wide variety of materials, interpreting the results, and providing detailed reports summarizing the findings. He can provide practical and comprehensive testing that is independent and unbiased. He has practical experience performing a broad range of tests to determine the strength, physical, chemical, and wear properties of metals, ceramics, composites, and plastics. Dr. Babcock is the author of over forty technical papers and holds five patents. View Curriculum Vitae.

Richard J. M. Bidwell, PE - Chemical, Industrial Incident Investigator

Ric Bidwell is a Licensed Professional Chemical Engineer that brings to ITC Expert Services nearly 30 years of multidisciplinary engineering experience. He has fully utilized his diverse hands-on experience in the national and international investigations of fires and explosions involving residential, commercial, chemical industrial facilities and heavy equipment. He has also been responsible for failure analysis and incident investigations relating to industrial and chemical processes or process equipment, chemical exposure, industrial accidents and safety.

Mr. Bidwell has nearly two decades of experience in all engineering aspects of chemical processing and industrial plant operations, including design, maintenance, safety and bulk material handling and transportation. Clients have included major petroleum and chemical producers, fuel gas companies and suppliers, the United States Chemical Hazard and Safety Board (CSB) and the United States Environmental Protection Agency (EPA).

Mr. Bidwell Specializes in:

Fire and Explosion Investigation Natural Gas, LP and Propane Systems Chemical and Industrial Processes Industrial Incident Investigations Chemical Release and Exposure Bulk Material Transportation Incident Investigation

Plumbing, Piping and Pumping Systems Combustion & Heating Equipment Industrial and Commercial Safety Industrial and Heavy Equipment HVAC and Refrigeration Equipment

View Curriculum Vitae.

Kevin Pedersen, CFI, CFEI - Director, Fire Investigations

Mr. Pedersen, an investigator for over sixteen years, has extensive training in fire and explosion investigation techniques and experience in many forensic disciplines. He is certified in fire, explosion and arson investigation, holding both CFI (Certified Fire Investigator) and CFEI (Certified Fire and Explosions Investigator) certifications from the International Association of Arson Investigators (IAAI) and the National Association of Fire Investigators (NAFI), respectively. He is an Illinois licensed Private Detective, a Wisconsin licensed Private Detective, and a trained and accomplished evidence photographer. He has worked on investigations for both civil and criminal cases involving industrial accidents, traffic accidents and fires involving injuries, fatalities and property damage. He has also worked on criminal investigations involving surveillance, assault and battery, and homicides occurring during shootings, cases of arson, and bombings. Mr. Pedersen spent five years as a major crimes investigator for the City of Chicago Police Department in their Bomb and Arson Unit where he investigated over 1,000 incidents involving many major crimes. His experience includes incidents and explosions involving natural gas and propane, as well as residential and industrial fires, and fires in machinery and appliances. View Curriculum Vitae.

Mr. D.E. Hansen, M.E. founded Piping Analysis Incorporated (PAI) in 1972 as a full service Engineering Company specializing in Piping, Mechanical, Machinery, and Civil / Structural Design Problems. Originally serving the local Gulf Coast region (Louisiana, Texas, Mississippi), PAI has seen tremendous growth in its business and now solves complex engineering problems all over the world. The results of their work are presently operating throughout the Americas, Europe, the Middle East, Africa, and Asia.

PAI understands that efficiency loss and shut-downs cut deeply into the bottom line. PAI will work around the clock to provide the correct answers as quickly as possible and you can expect the most workable, cost-effective solution.

Areas of Expertise:

Piping Stress & Flexibility Finite Element Analysis CFD & Fluid Flow Heat Transfer Vibration Failure Analysis

Plant Design Civil & Structural Construction Drawings Project Scheduling Design Review Construction Follow-Up

Construction Practice at Robson Forensic

The Construction Practice at Robson Forensic consists of experts in architecture and civil, structural, mechanical, and electrical engineering. Our experts have designed, built and maintained residential, industrial, institutional, municipal, heavy civil and commercial buildings and structures.

Our Construction Group consists of more than 50 experts across 17 locations. Please contact one of the practice group leaders below to discuss your case and determine which of our experts is most appropriate to assist with your matter.

Mark E. Williams, AIA, NCARB
Architectural / Professional Liability Expert

Mark is a broadly experienced architect with a diverse career that included new construction, adaptive-reuse, and renovation projects on a wide range of building types and occupancies. Through his 25 years of experience and his focus on problem solving, Mark provides technical investigations and expert analysis on construction contract disputes, large construction defect claims, and matters of architect professional liability including claims of bad faith. View Curriculum Vitae



Brent Leisenring, P.E.
Civil Engineering / Construction Safety Expert

Brent is a Civil Engineer with more than 30 years of hands-on experience in construction and engineering. He has experience in construction as a contractor, construction manager, engineer, subcontractor and material supplier on projects ranging from single-family dwellings to oil refineries. His unique background and experience qualify him to analyze the actions and responsibilities of all parties involved to determine liability for defective construction as well as unsafe conditions on construction sites. He is a Professional Engineer in five states and has testified in several states. View Curriculum Vitae



Dale Cagwin, P.E.
Building Systems Expert

Dale’s experience includes over 20 years as a mechanical engineer designing, testing and maintaining building systems including fire suppression, HVAC, plumbing, gas, water and sewage in a variety of commercial, industrial, institutional and municipal buildings. Dale has served on standards writing committees and worked with product approval agencies. He is a P.E. in seven states, a Certified Fire Investigator and has testified in a broad range of building systems cases. View Curriculum Vitae

MEP Engineer of Record for the design and construction of more that 1300 MEP projects located in the USA, Europe, Canada, Asia, South America, and Carribbean since 1965.



REGISTERED PROFESSIONAL MECHANICAL ENGINEER and Engineer of Record for the design and the construction of HVAC, & Plumbing Systems



REGISTERED PROFESSIONAL ELECTRICAL ENGINEER and Engineer of Record for the design and the construction of Interior and Exterior Lighting Design, Interior Electrical Power Distribution Systems, Exterior Power Distribution to Class 35kV, Large Un-interruptible Power Systems, Large Emergency Power Generation Systems to 750kVA, Electrical Power Quality Analysis Documentation & Harmonic Current Attenuation Design



EXPERT WITNESS SERVICES for Facility HVAC, Electrical Power. Lighting and Plumbing Systems; Construction Contract Administration Services; Project Construction Cost Estimating Services; Life Cycle Cost Analysis Report Services; Energy Consumption Analysis Report Services; Diesel power engine-generators and fuel systems; UPS systems; Data Processing power and Grounding systems;