Tom W. Ashton R.E.H.S., L.P.S.S., On-Site Sewage Disposal Consultant, P.O. Box 667, Chincoteague Island, VA 26667
Phone 540-454-4672 Email twa220@aol.com
Education Old Dominion University, B.S. Environmental Health (1978); Shenandoah University, M.B.A. (1989)
Areas of Expertise Site/Soil Evaluation Feasibility for On-Site Wastewater Treatment and Dispersal Systems; System Design of Innovative and Alternative Systems (Drip Dispersal, LPD etc.); Hydraulic Assessment (Ksat Testing, Constant Head Bore Hole Method); On-Site Wastewater/Stormwater, General Consulting. Service Area Primarily Maryland and Virginia Certifications/Licenses Registered Environmental Health Specialist (R.E.H.S., 1985), National Environmental Health Association; Licensed Professional Soil Scientist (C.P.S.S, 1991, L.P.S.S 2013), Virginia Department of Commerce; Licensed Master Alternative On-Site Evaluator (M.A.O.S.E., 2009), Virginia Department of Commerce


Amanda Atwell Wetland Studies and Solutions, Inc., 1131 Benfield Blvd, Suite L, Millersville, MD 21108
Phone 571-334-8397 Email aatwell@wetlands.com Website www.wetlands.com
Education University of Florida, B.S. Environmental Science (2000); Virginia Tech, M.S. Crop Soil & Environmental Science (2003)
Areas of Expertise Wetland Identification, Delineation and Mitigation, Erosion and Sedimentation Service Area Maryland Delaware, Virginia, Connecticut, New England Certifications/Licenses CPSS, ARCPACS; PWS, Society of Wetland Scientists; PSS Soil Science Society of Southern New England; CESSWI, EnviroCert International; Qualified Airport Wildlife Biologist


Adam B. Browning Penn’s Trail Environmental, LLC, 327 E. Ridgeville Blvd., #141, Mount Airy, MD 21771
Phone 301-829-5022 Email abrowning@pennstrail.com Website www.pennstrail.com
Areas of Expertise Decentralized Wastewater System Design Service Area Maryland & Pennsylvania Certifications/Licenses Pennsylvania Sewage Enforcement Officer


William Gangloff Accent Environmental, PO Box 788, Millsboro, DE 19966
Phone 302-352-1700 Email bill@accentenvironmental.net Website www.accentenvironmental.net
Education University of Delaware B.S. (1992), M.S. (1995), Colorado State University PhD (2004) 
Areas of Expertise Wastewater, Stormwater, Soil Mapping, GIS/GPS, Nutrient Management Service Area Delaware, Maryland, Virginia Certifications/Licenses CPSS, CPAg, VA Soil Scientist, DE Nutrient Management MD Nutrient Management


Amy M. Parrish Barton & Loguidice, DPC (pronounced Lo-joo-dis), 1912 Liberty Road, Suite 26, Eldersburg, MD 21784
Phone 410-795-4626 Email aparrish@bartonandloguidice.com Website www.bartonandloguidice.com
Education Susquehanna University, B.S. Geological and Environmental Science, Emphasis Geology (2001)
Areas of Expertise Hydrogeological evaluations for spray, drip, rapid infiltration, subsurface wastewater discharge; Evaluations of groundwater discharge and land application of effluent; Site and soil evaluations; On-site soil disposal systems design; Stormwater BMP evaluations; Natural burial evaluations Service Area Primarily commercial and public sector clients in MD, DE, PA, VA, NJ, and NY Certifications/Licenses Licensed Environmental Health Specialist; Professional Geologist in PA and DE


Sarah Roberts Biohabitats, Inc., 2081 Clipper Park Road, Baltimore, MD 21212
Phone 410-554-0156 (Main Office); 667- 401-8473 (Direct) Email sroberts@biohabitats.com Website https://www.biohabitats.com/
Education Virginia Polytechnic Institute and State University, B.S. Environmental Science (2004)
Areas of Expertise Ecological assessment, design, permitting, and monitoring for stream and wetland restoration and mitigation; Ecological assessment and monitoring (pre, during, and post-construction) experience includes habitat assessment, stream survey and characterization, stream and wetland monitoring, stream biological monitoring, water quality monitoring, groundwater monitoring, soil characterization and sampling, etc.; County, state and federal permitting for shoreline, stream and wetland restoration/mitigation and stormwater management facilities and retrofits; Wetland delineation Service Area Chesapeake/ Delaware Bays Bioregion and throughout the United States


Clifford E. Stein Earth Data, Inc., 131 Comet Drive, Centreville, MD 21617
Phone 410-758-8160 (O); 410-739-3804 (C) Email cstein@earthdatainc.com
Education University of Maryland, B.S. Agronomy/Soils (1972), M.S. Soils (1978)
Areas of Expertise Onsite wastewater disposal; Spray irrigation of treated wastewater; Rapid infiltration of treated wastewater Certifications/Licenses CPSS/SC 1998-2014 Service Area Maryland, Delaware


Jenwei Tsai Senior Scientist at Verdantas, 1143 Savanah Road, Ste 1A, Lewes, DE 19958
Phone 302-239-6634 Email jtsai@verdantas.com Website https://www.verdantas.com/
Certifications/Licenses CPSS, PWS


John S. Wah Matapeake Soil and Environmental Consultants, P.O. Box 186, Shippensburg, PA 17257
Phone 240-604-6639 Email matapeake.soil@gmail.com Website matapeakesoil.com
Education Penn State, B.A. Anthropology (1993); University of Tennessee M.S Soil Science (1998); University of Maryland, Ph.D. Soil Science (2003)
Areas of Expertise Soils in archaeology; Soils and geomorphology; Soils mapping; Soils education and outreach; Residential soils analysis, PA onsite wastewater; Residential soils analysis, Frederick County, MD flooding soils; Laboratory analysis of soils; Soil monoliths Certifications/Licenses MAPSS/PAPSS Full/Professional Member; PA DEP SEO Service Area Mid-Atlantic, Northeast, Southeast, California, Puerto Rico


Austin Young Colliers Engineering & Design, 6240 Old Dobbin Ln #100, Columbia, MD 21045
Phone (443) 393-6021 Email austin.young@collierseng.com
Education The Pennsylvania State University, B.S. Environmental Soil Science (2010)
Areas of Expertise Site/Soil Evaluation Feasibility for On-Site Wastewater Treatment and Stormwater Systems; Wetland/Water Identification, Delineation & County, State and Federal permitting, Soil Mapping, and General Consulting Certifications/Licenses CPSS (Soil Science Society of America), PWS (Society of Wetland Scientists), and Qualified Professional (MD DNR) Service Area Maryland, Delaware, Virginia, Pennsylvania, New Jersey, New York, and New England