List of Applicant's Expert Witness Resumes Mark R. Stephens, P.G., P.E The Colinas Group, Inc. Jeffrey A. Straw GeoSonics, Inc. Christopher C. Hatton, P.E. KimleyHom Darren L. Stowe, AICP Environmental Consulting &Technology Inc. Kelly M. Love, MCP Clearview Land Design, PL Michael A. McElveen, MAI, CCUIM, CRE Urban Economics, Inc. Henry J. Fishkind, Ph.D. Fishkind & Associates, Inc. Lee M. Walton Flatwoods Consulting Group Lee Hutchinson, RP A Archaeological Consultants, Inc. Dr. Christopher M. Teaf Toxicologist, Florida State University David L. Teasdale, P.E. HAAG Engineering MARK R. STEPHENS, P. G., P. E. THE COLINAS GROUP, INC 2031 EAST EDGEWOOD DRIVE, SUITE 5 LAKELAND, FLORIDA 33803 TITLE: President I Principal Consultant EDUCATION: M.S., 1974 Geology/Water Resources, Iowa State University B.S., 1972 Geology, Iowa State University PROFESSIONAL LICENSES: Professional Engineer - Florida Professional Geologist - Florida Professional Geologist - Kentucky PROFESSIONAL EXPERIENCE: 43 Years SELECTED EXPERIENCE: CIVIL ENGINEERING • Environmental Resource Permitting and stormwater management design for numerous sand mines, limestone quarries, and industrial facilities in Florida. • Mine design and permitting for limestone quarries in Sumter, Alachua, Collier, Marion, Hernando, Palm Beach and Lee Counties and sand mines in Polk, Lake, and Glades Counties, Florida. • Spill Prevention, Control, and Countermeasures Plans (SPCC Plans) for numerous sand mines, limestone quarries, and industrial facilities in Florida, Georgia, and South Carolina. • Best Management Practices Plans for numerous sand mines, limestone quarries, and industrial facilities in Florida • Design of environmental monitoring and management programs for numerous sand mines and limestone quarries in Florida. • Stormwatermanagement system design and permitting for industrial facilities including office buildings, paving projects, sand mines and limestone quarries in Florida. • County Conditional Use Permits and Operating Permits for several sand mines, limestone quarries, industrial facilities, and offices in Florida. WASTE DISPOSAL • Design and preparation of permitting documents for brine disposal injection well in Brevard County, Florida. • Wastewater permitting for demineralizer concentrate disposal from reverse osmosis water treatment. • Hydrogeologic evaluations of rapid rate and slow rate effluent disposal systems throughout Florida. • Investigation of ground water quality impacts from industrial landfills in Palm Beach County, Florida and Delaware • Sanitary landfill siting study in Maryland. • Design of chemical waste disposal facility and process water impoundments for phosphate chemical plants in Polk Coimty, Florida. • Exploration, design, and permitting of injection well systems for wastewater disposal in Key Largo, Florida, Nassau, Bahamas, and Brevard County, Florida. • Consultation to drilling contractor for hydro geologic testing of an injection well testing program in Brevard County, Florida. • Evaluation of ground water quality impacts from sanitary landfill in Broward County, Florida. Page 1 of 4 MARK R. STEPHENS, P. G., P. E. • Evaluation and expert testimony for EPA relating to a sanitary landfill in Dade County, Florida. • Sampling and evaluation of hazardous wastes at facilities throughout Florida. • Design, permitting, and construction of chemical process waste improvement in Polle County, Florida. • Evaluation of operation and ground water monitoring data for injection wells in Melbourne, Florida. • Life expectancy study of existing phospho-gypsmn storage area. GROUND WATER QUALITY/CONTAMINATION • Design ground water monitoring programs for Clean Closure Equivalency Demonstration. • Assessment of soil, sediment, and grolilld water contamination from creosote facility. • Design and implement remedial system for construction project in Jacksonville, Florida. • Design, review, implement and monitor remedial action system for fuel- and oil-affected soil and ground water for sites in Pinellas, Duval, Brevard, Dade, Palm Beach, Lee, Broward, Pasco, and Sarasota Counties, Florida. • Conduct remedial alternatives evaluation for arsenic in soil in northwest Florida. • Review of leaded battery disposal facility, ground water cleanup system, and recommendations for improvement - design closure for facility. • Technical coordinator for underground storage tank program for a major utility company in Florida. • Conduct contamination assessments at over 100 leaking fuel storage facilities in Florida, North Carolina, South Carolina, and the Bahamas. • Bioremediation of fuel-affected soil in Sarasota County and Lee County, Florida. • Investigation of ground water and soil at oil/water separator in Broward and Dade Counties, Florida. • Design and operation of ground water quality monitoring networks for industrial, mining, and chemical facilities. • Investigation of volatile organic contamination and design of cleanup systems in Palm Beach, Florida. • Design and installation of an abatement and cleanup system for ground water contamination at a chemical processing facility in Polk County, Florida. • Evaluation of migration of spill of radioactive water at two nuclear power plants in Florida. • Contamination investigation of volatile organic compounds near Gainesville, Florida. • Salt water intrusion modelling for the determination of safe abstraction rates in Florida, Grand Cayman Island, and the Bahamas. • Investigation of pesticide disposal sites in central Florida and South Carolina. • Contamination investigation and remediation for railroad repair facility in Clay County, Florida resulting in a SCRO. • Investigation river sediments for PCBs and various contaminants from fonner military facility in Clay County, Florida. GROUND WATER SUPPLY • Technical review ofwellfield construction and testing in Citrus County, Florida • Evaluation of quarry dewatering impacts for limestone quarry in Sumter County, Florida. • Wateruse permitting for sand mines in Lake and Polk County, Florida • Ground water supply investigation and aquifer testing in Seminole County, Florida • Design of several municipal well fields in Florida and the Bahamas • Investigations of industrial ground water supplies for phosphate mining beneficiation in central Florida • Ground water supply investigation for coal-fired power plants in Martin, Manatee, and Putnam Counties, Florida • Ground water resource management evaluation for Walt Disney World • Design of shaft mine dewatering and water reuse system in Utah • Ground water resource assessment for military reservation in Colorado • Assessment of ground water conditions relating to_ construction of residential developments • Wellfield rehabilitation testing and design for Mayport Naval Air Station Page 2 of 4 MARK R. STEPHENS, P. G., P. E. PROFESSIONAL AFFILIATIONS: American Institute of Professional Geologists Association of Ground Water Scientists & Engineers Florida Engineering Society Florida Institute of Consulting Engineers Florida Association orProfessional Geologists REGISTRATIONS: Professional Geologist, Florida No. PG-0000506, 1989 Professional Engineer, Florida No. 36179, 1985 Certified Professional Geologist No. 5196, 1982 Professional Geologist, Kentucky No. KY-2564, 2013 PUBLICATIONS AND PAPERS: Stephens, M.R., 1994, "Modeling Ground Water Contam.ination at a Chlorinated Spill Site", paper presented at Florida Bar Environmental and Land Use Section, Orlando, Florida, May, 1994 11 11 Stephens, M.R., 1994, Restoration Insurance& Reimbursement for Petroleum Cleanup , National Institute for Storage Tank Management, Pensacola, Florida, September, 1994 Stephens, M.R., and Hull, Jon, 1994, "Remedial Planning Using PORFLOW", Workshop on Grnund Water Modeling for Environmental Applications, PORFLOW Users Group Meeting, September, 1994. Stephens, M.R., and Luckett, M.A., 1984, "Predictive Analysis of Post-Mining Shallow Aquifer Hydrology", NWWA Conference on Ground Water Managemen~ October, 1984 Stephens, M.R., 1979, 11 Ground Water Considerations in South Florida Landfill Design'', In Progress in Civil Engineering Design, ASCE, South Florida Section, October, 1979 11 Stephens, M.R., 1979, nLarge-Scale Aquifer Testing in Central Florida , paper presented Southeastern Geological Society, December, 1979 Stephens, M.R., Sendlein, L.V.A., and Pahnquist, R.C., 1974, "Contamination Zones Induced by 11 Solid Waste Disposal Sites Located on Alluvial Floodplains , Abstracts, North-Central Section, Geological Society of America, March, 1974, Vol 6, No. 6 Stephens, M.R., and Sendlein, L.V.A, 1974, "Spatial Variations of Ground Water Quality Resulting from Landfills on Alluvial Floodplains", paper presented Iowa Academy of Science, 86th Annual Session, April, 1974 Chen, Robert and Stephens, Mark, 1987, 11 The Geotecbnical Engineers Role in Pre-Purchase Site Assessments, 11 Journal, Florida Engineering Society, September, 1987 Maron, Lawrence, and Stephens, Mark, 1988, 11 Contarninated Water- How Do We Clean It?" Fann Chemicals, May, 1988 Stephens, Mark R., nEnvironmental Consultants, 11 1988, Paper presented to Environmental Regulation Course, Executive Enterprises, Inc., Orlando, Florida, August, 1988 Page 3 of 4 MARK R. STEPHENS, P. G., P. E. 11 Stephens, Mark, R., nReimbursement for Petroleum Contamination Sites , Paper presented to Florida Chamber of Commerce 1990 Environmental Permitting Summer School, July 1990, January 1991, July 1992 11 11 Stephens, Mark, R., Economic Geology of Florida , Paper presented to Palm Beach County Science Teachers