Our Team

E. Corbin McGriff, Ph.D., P.E., has served in many areas of the environmental engineering field for over 30 years.  He has been President and Director of Operations of two environmental consulting firms in Mississippi and has worked extensively throughout the environmental engineering field on a broad range of projects that include governmental, industry, and private enterprise.  Dr. McGriff has a Ph.D., in Environmental Health Engineering, and BS and MS in Civil Engineering with emphasis in Environmental Engineering and Fluid Mechanics.  His professional experience includes teaching and conducting research at the university level.  He was Assistant Professor of Environmental Engineering at Mississippi State University, Research Associate of Environmental Engineering at the University of Kansas, and Assistant Professor of Civil Engineering at The Citadel, Charleston, South Carolina.  Since leaving academics, Dr. McGriff has been active in the environmental consulting field throughout the southeastern United States.  His area of specialty includes environmental auditing, environmental assessments and impact statements (NEPA), and innovative contamination investigations and corrective action systems design.  As a Registered Professional Engineer, Dr. McGriff is the Project Director of all HAZCLEAN projects and has overall project authority.  He provides all communications to the client and coordinates all activities required by the project specification.   

Michael P. Collins, P.E., has over 34 years of experience throughout the environmental engineering field on a broad range of projects, including governmental, industry, and private enterprise. Mr. Collins has a BS and MS in Chemical Engineering. His professional experience includes Project and Senior Project Engineer with S. E. Huey Co., Monroe, Louisiana; President of Collins Engineering, West Monroe, Louisiana, and Senior Project Engineer with ALTEC Environmental Consultants, Inc., Shreveport, Louisiana, before joining HAZCLEAN.  Mr. Collins has conducted environmental studies for the preparation of grant applications, environmental audits, Storm Water Management Plans, Spill Prevention Control and Countermeasure Plans, and Phase I Environmental Site Assessments.  These projects involved the extensive review of potential impacts of development to environmental, cultural, historical, archaeological, and local infrastructure, which included the proposed cost of development.  Projects also involved the comprehensive review of the local geologic conditions and soil surveys with a review of endangered/threatened flora/fauna species native to the proposed impact sites. 

Joseph M. Drapala, CIH, CHMM, CIEC, is a Certified Industrial Hygienist (CIH), Certified Hazardous Materials Manager (CHMM), Certified Indoor Environmental Consultant (CIEC) and a Certified Microbial Consultant (CMC). Mr. Drapala has a BS in Mechanical Engineering and has over 18 years of experience in indoor air quality investigations, remediation and renovation designs. He has conducted investigations for federal, state, and local governmental agencies, institutions of higher learning, and private concerns, as well as AHERA Inspections and planning management for various school districts throughout the southeast.  Additionally, Mr. Drapala provides expert witness and assistance for trial preparation to attorneys involving indoor air quality (IAQ) and industrial hygiene (IH) litigation.  He has written articles and materials for IAQ education seminars with emphasis on molds and bio‑aerosol exposures.

Jack E. Daugherty, PE, CIH has over 40 years of environmental and occupational safety and health management experience, ranging from military service to private consulting for a wide range of industries.  Mr. Daugherty has a BS and MS in Chemical Engineering.   In addition to his academic credentials, Mr. Daugherty is a licensed engineer in Mississippi and a Certified Industrial Hygienist (CIH) by the American Board of Industrial Hygiene.  Mr. Daugherty is also a well-respected author of three books on environmental issues and a contributor of chapters and articles to several publications.  His area of specialty is the scientific and engineering investigation of physical and chemical impacts on the environment, indoors or outdoors, with an emphasis on process safety. He has assessed such hazards as noise, vibration, ionizing and nonionizing radiation, airborne pollutants, waterborne pollutants and soil contaminants. He has also provided corrective action systems design and troubleshooting.

Kelvin A. Thigpen, CHMM, is a certified hazardous materials manager (CHMM), a certified asbestos inspector, a certified lead inspector and is trained and experienced in conducting Environmental Site Assessments in accordance with HUD and USDA requirements.  Mr. Thigpen has a BS in Biology and a BS in Toxicology.  Mr. Thigpen has over 17 years of experience conducting environmental assessments and assessments and analyses for asbestos, lead and other toxic materials.  He has conducted over 300 Phase I and Phase II Environmental Site Assessments throughout the southeast for commercial, industrial, educational and governmental clients, including assessments in accordance with HUD and USDA-funded projects.  Mr. Thigpen is an Environmental Professional, as defined in American Society for Testing and Materials (ASTM) Standard E 1527-05, published November 2005, effective November 1, 2006, which is the acceptable standard for the EPA All Appropriate Inquiries (AAI) Final Rule (40 CFR Part 312), and he conducts all Environmental Site Assessments in accordance with ASTM E-1527.05.

Michael A. Noone, RPG, a Registered Professional Geologist/Geoscientist in the states of Mississippi, Alabama, Tennessee and Texas, has over 23 years experience as a professional geologist. Mr. Noone has a BS in Geology and a BS in Business Administration.  He serves as Geological Services Manager and Quality Assurance Officer for HAZCLEAN.  He has served as Senior Project Manager for the Assessment and Remediation of Hazardous Waste Sites, which involved soil and groundwater contamination remediation, throughout the southeast.  He conducts leaking underground storage tank (LUST) contamination assessments, implementation of remediation projects, and preparation of technical reports and proposals in a professional cost-effective and time-efficient manner.  In addition, Mr. Noone has developed and implemented corporate training manuals and programs as regulated by the Codes of Federal Regulation (CFRs); Titles 29 (Labor); 40 (Protection of Environment); and 49 (Transportation).  Additionally, Mr. Noone has conducted Phase I and II Environmental Site Assessments on undeveloped property as well as industrial and non-industrial properties which included site walkover, historical usage, interviews, and Chain-of-Title. 

Phillip E. Dalton has more 20 years of experience in conducting Phase I Environmental Site Assessments and RCRA Compliance Audits for commercial and industrial properties.  Additionally, he has conducted NEPA Assessments which included Wetlands Delineations and Endangered Species Surveys for state and government projects. He conducts Phase I, II and III underground storage tank (UST) contamination assessments, implementation of remediation projects, and preparation of technical reports and proposals in a professional cost-effective and time-efficient manner for industrial and Superfund sites.  Mr. Dalton’s training and interest in mold assessment and remediation has been valuable to the Indoor Air Quality program of the Alabama Branch Office where he has conducted numerous indoor air quality (IAQ) investigations for mold-related exposures from water damaged building materials in residential and commercial buildings.