Staff

Ms. Dittrick is a Senior Project Professional with SCS’s Tracer Environmental division. She is responsible for the documentation of Process Safety Management Programs (PSM), Risk Management Programs (RMP), General Duty Clause Programs (GDC), and California Accidental Release Prevention (CalARP) Programs for facilities using regulated substances. Her main area of concentration is risk analysis.

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    • Ms. Dittrick is a Senior Project Professional with SCS’s Tracer Environmental division. She is responsible for the documentation of Process Safety Management Programs (PSM), Risk Management Programs (RMP), General Duty Clause Programs (GDC), and California Accidental Release Prevention (CalARP) Programs for facilities using regulated substances. Her main area of concentration is risk analysis.
      Ms. Dittrick works closely with SCS’s national and regional clients.  Since joining SCS in 2013, she has worked on projects preparing all necessary documentation for compliance with the PSM/RMP/CalARP regulation, developing the Piping and Instrumentation Diagrams (P&IDs), modeling the potential off-site consequences of potential releases, compliance audits, and other environmental study projects for municipal and private clients.

      Ms. Dittrick is proficient in OSHA Standards, environmental sustainability, environmental regulation regarding federal and state policies, and associated engineering standards. She assists facilities with the implementation of standard operating procedures and safety practices to ensure compliance with state and federal regulations by performing compliance audits and/or gap analysis assessments. Amber has participated in many state and federal inspections (CUPA, EPA, OSHA) by providing guidance and assistance to the facility during the inspection or documentation request. By participating in these inspections, Amber assists and coordinates with the facility on developing an action plan of improvement and implementation on inspection findings. 

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Mr. Doan has been with SCS since 1994. As an SCS staff scientist, Mr. Doan coordinates and conducts a majority of the SCS field investigations and assessments in the Pacific Northwest. He is licensed for UST site assessments by the Washington State Department of Ecology, and he is certified for UST decommissioning by the International Fire Code Institute.

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    • Mr. Doan has been with SCS since 1994. As an SCS staff scientist, Mr. Doan coordinates and conducts a majority of the SCS field investigations and assessments in the Pacific Northwest. He is licensed for UST site assessments by the Washington State Department of Ecology, and he is certified for UST decommissioning by the International Fire Code Institute.
      Mr. Doan is also SCS’ health and safety officer. He has completed 40 hours of OSHA standard 29 CFR 1910.120 compliant health and safety training with annual eight-hour refresher training. He is also trained in first aid and CPR.
      As an EMS auditor, Mr. Doan has been helping clients with ISO 14000 environmental management systems gap analysis and implementation since 1995.

Mr. Doerr is a Senior Vice President of SCS Engineers and the Business Unit Director of our Central region. He is experienced in a wide variety of environmental projects with particular emphasis on solid waste management. Throughout his career, Mr. Doerr has been instrumental in developing client strategies to address various regulatory and other complex environmental issues. He has a bachelor’s degree in Civil Engineering and a master’s degree in Business Administration, and is a licensed professional engineer in Colorado, Illinois, Kansas, Missouri and Nebraska.

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    • Mr. Doerr is a Senior Vice President of SCS Engineers and the Business Unit Director of our Central region. He is experienced in a wide variety of environmental projects with particular emphasis on solid waste management. Throughout his career, Mr. Doerr has been instrumental in developing client strategies to address various regulatory and other complex environmental issues. He has a bachelor’s degree in Civil Engineering and a master’s degree in Business Administration, and is a licensed professional engineer in Colorado, Illinois, Kansas, Missouri and Nebraska.
      Practice Areas
      Mr. Doerr’s project experience includes landfill and surface impoundment permitting and design, environmental monitoring; transfer station and material recovery facility permitting and design; and all facets of environmental compliance. In addition to solid waste, Mr. Doerr has directed environmental consulting projects, including air permitting and compliance, traditional civil engineering, alternative energy planning and implementation, and environmental investigation and remediation.

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Ms. Dolden is the Vice President of Human Resources of SCS Engineers. She is a member of the senior management team and is responsible for human resources strategy and planning, talent acquisition, compensation and benefits, employee relations, and training and development.

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    • Ms. Dolden is the Vice President of Human Resources of SCS Engineers. She is a member of the senior management team and is responsible for human resources strategy and planning, talent acquisition, compensation and benefits, employee relations, and training and development. Ms. Dolden has a Bachelor of Arts degree in psychology from California State University, Dominguez Hills, and a Master of Arts degree in industrial/organizational psychology from California State University, Long Beach. She is a certified Senior Professional in Human Resources (SPHR®) and a SHRM Senior Certified Professional (SHRM-SCP).

Mr. Dong has 40 years of technical and practical experience in environmental engineering, environmental chemistry, hazardous waste characterization and management, and project management – all with SCS. He oversees projects related to hazardous waste assessment and remediation.

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    • Mr. Dong has 40 years of technical and practical experience in environmental engineering, environmental chemistry, hazardous waste characterization and management, and project management – all with SCS. He oversees projects related to hazardous waste assessment and remediation. He also has considerable technical environmental auditing and permitting experience

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Ms. Dougherty is a Senior Project Engineer specializing in environmental and civil engineering systems planning and design, groundwater hydrology, air pollution modeling, and health risk assessment. She has managed landfill closure cap construction and gas collection and control system (GCCS) construction projects, and has participated in the oversight of project budgets, client interaction, coordination with regulatory staff, design and technical review, and project construction and fieldwork. Ms. Dougherty is a licensed Professional Engineer in California, Oregon, Washington, and Hawaii. She received her Bachelors Degree in Engineering from Princeton University and her Masters in Environmental Engineering from the University of California, Berkeley.

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    • Ms. Dougherty is a Senior Project Engineer specializing in environmental and civil engineering systems planning and design, groundwater hydrology, air pollution modeling, and health risk assessment. She has managed landfill closure cap construction and gas collection and control system (GCCS) construction projects, and has participated in the oversight of project budgets, client interaction, coordination with regulatory staff, design and technical review, and project construction and fieldwork. Ms. Dougherty is a licensed Professional Engineer in California, Oregon, Washington, and Hawaii. She received her Bachelors Degree in Engineering from Princeton University and her Masters in Environmental Engineering from the University of California, Berkeley.

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Jed Douglas
National Expert on Industrial Hygiene/Senior Project Advisor
Long Beach, CA
National Expert on Industrial Hygiene
O. (562) 426-9544

Mr. Douglas is SCS Engineers National Expert on Industrial Hygiene, and a Senior Technical Advisor specializing in Occupational Health and Safety issues. He is a Certified Industrial Hygienist (CIH), a Certified Safety Professional (CSP), a Professional Geologist (PG) in California, Oregon, Washington, and Arizona, and a Leadership in Energy and Environmental Design Accredited Professional (LEED AP). He has 30 years of experience as a health and safety specialist and project manager, and has managed numerous environmental projects involving: safety; soil and groundwater investigations and remediation of hazardous constituents; and, indoor air quality (IAQ) assessments for physical, chemical, and biological contaminants.

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    • Mr. Douglas is SCS Engineers National Expert on Industrial Hygiene, and a Senior Technical Advisor specializing in Occupational Health and Safety issues. He is a Certified Industrial Hygienist (CIH), a Certified Safety Professional (CSP), a Professional Geologist (PG) in California, Oregon, Washington, and Arizona, and a Leadership in Energy and Environmental Design Accredited Professional (LEED AP). He has 30 years of experience as a health and safety specialist and project manager, and has managed numerous environmental projects involving: safety; soil and groundwater investigations and remediation of hazardous constituents; and, indoor air quality (IAQ) assessments for physical, chemical, and biological contaminants.
      Mr. Douglas has directed, managed, and performed every aspect of various projects, including: industrial hygiene; safety training; IAQ investigations; Leadership in Energy and Environmental Design certification for new construction and renovation; construction management; mold investigations and remediation; asbestos and lead investigations and remediation; chemical and heavy metal investigations and remediation, including underground storage tanks; and, data presentation, interpretation, and reporting. He has taught technical writing for engineering students at Humboldt State University, and has many years of experience in: preparing proposals, cost estimates, contracts and specifications; office and field safety; data collection and interpretation; field operations and sampling; vertical and horizontal drilling supervision; quality assurance and quality control (QA/QC); team leadership; and, staff training, mentoring, and supervision.
      Mr. Douglas has directed, managed, and performed every aspect of various projects, including safety training; IAQ investigations; Leadership in Energy and Environmental Design certification for new construction and renovation; construction management; mold investigations and remediation; asbestos and lead investigations and remediation; chemical and heavy metal investigations and remediation, including underground storage tanks; and, data presentation, interpretation, and reporting. He has taught technical writing for engineering students at Humboldt State University, and has many years of experience in preparing proposals, cost estimates, contracts and specifications; office and field safety; data collection and interpretation; field operations and sampling; vertical and horizontal drilling supervision; quality assurance and quality control (QA/QC); team leadership; and, staff training, mentoring, and supervision.

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Mr. Dreiling has served public- and private-sector clients as an environmental consultant for three decades. His technical responsibilities include project and program management, developing and implementing consulting strategies, quality assurance/quality control and loss prevention review, regulatory negotiations, and public relations. His technical specialty is urban redevelopment of environmentally-impaired properties (Brownfields).

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    • Mr. Dreiling has served public- and private-sector clients as an environmental consultant for three decades. His technical responsibilities include project and program management, developing and implementing consulting strategies, quality assurance/quality control and loss prevention review, regulatory negotiations, and public relations. His technical specialty is urban redevelopment of environmentally-impaired properties (Brownfields). This includes overall responsibility for environmental due-diligence, assessment, and remedial actions for numerous large urban redevelopment districts. Over his career, he has assessed and remediated over 700 contaminated properties addressing a wide range of regulated substances.

Mr. Dreyer is SCS’s Corporate Training and Development Manager, specializing in Health & Safety. He oversees deployment of training programs, including course and curricula development, training staff and supervisors across the country, and developing digital platforms to provide mandatory and supplemental training to employees nationwide.

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    • Mr. Dreyer is SCS’s Corporate Training and Development Manager, specializing in Health & Safety. He oversees deployment of training programs, including course and curricula development, training staff and supervisors across the country, and developing digital platforms to provide mandatory and supplemental training to employees nationwide.

Mr. Drooger is a Project Professional with SCS’s Environmental Services division, and provides environmental science and engineering support for projects performed out of the Reston, Virginia office. His seven years of experience have included field investigation, preparation, and management of Phase I Environmental Site Assessment (ESA) Reports, multi-media sampling to support Phase II ESAs, Storage Tank and Site Investigations, Remedial Actions, and Solid Waste Studies.

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    • Mr. Drooger is a Project Professional with SCS’s Environmental Services division, and provides environmental science and engineering support for projects performed out of the Reston, Virginia office. His seven years of experience have included field investigation, preparation, and management of Phase I Environmental Site Assessment (ESA) Reports, multi-media sampling to support Phase II ESAs, Storage Tank and Site Investigations, Remedial Actions, and Solid Waste Studies.

Mr. Duckett is experienced in solid waste research and consulting.  He serves as Project Engineer for a variety of design projects, financial analyses, and planning efforts in support of solid waste assets such as convenience centers, transfer stations, recycling facilities, and landfills, as well as collections systems and entire solid waste programs. He has particular expertise with Sustainable Materials Management (SMM) and Integrated Solid Waste Management. He is a Professional Engineer licensed in Virginia.

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    • Mr. Duckett is a Project Professional based in our Richmond, VA office with experience in solid waste research and consulting.  He serves as Project Engineer for a variety of design projects, financial analyses, and planning efforts in support of solid waste assets such as convenience centers, transfer stations, recycling facilities, and landfills, as well as collections systems and entire solid waste programs. He has particular expertise with Sustainable Materials Management (SMM) and Integrated Solid Waste Management and has performed and managed a wide range of evaluations focusing on infrastructure inventorying, efficiency/effectiveness assessments, pro forma/scenario modeling, disposal options, waste diversion, and other studies. He is a Professional Engineer licensed in Virginia, and has a BS in Environmental Engineering, and is currently earning his MBA from Virginia Commonwealth University.
      His planning services encompass services ranging from business consulting to sustainability. He also provides full-service planning, design, and permitting capabilities for waste management facilities, from feasibility studies, needs assessments, site assessments, and the development of conceptual-level drawings, to the compilation of complete design packages of construction-level drawings, construction administration, local/state permitting and Construction Quality Assurance (CQA) inspections. Other work includes solid waste permitting, Clean Air Act (CAA) compliance/regulatory reporting, LFG modeling, and landfill/LFG CQA.

Mr. Duffy is a Senior Project Manager experienced in LFG control and recovery. His LFG experience includes the OM&M of LFG and LFGE systems, and non-routine repair and emergency call-out response of the LFG collection systems at various landfills in southern California, southern Nevada, and Arizona. Mr. Duffy’s responsibilities include environmental compliance with local, state, and federal regulations, project coordination/scheduling, supervision of field staff, safety plan preparation, field data analysis, compliance reporting, reporting field conditions and recommending solutions to clients, proposals and budget preparation, cost control, invoicing and contract administration.

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    • Mr. Duffy is a Senior Project Manager experienced in LFG control and recovery. His LFG experience includes the OM&M of LFG and LFGE systems, and non-routine repair and emergency call-out response of the LFG collection systems at various landfills in southern California, southern Nevada, and Arizona.
      Mr. Duffy’s responsibilities include environmental compliance with local, state, and federal regulations, project coordination/scheduling, supervision of field staff, safety plan preparation, field data analysis, compliance reporting, reporting field conditions and recommending solutions to clients, proposals and budget preparation, cost control, invoicing and contract administration. Mr. Duffy has conducted various odor source and mitigation studies for the City of San Diego, managed blower/flare station replacement/construction projects, flare source testing, well installations, and LFG collection systems upgrades projects, and has experience in managing AB 32 LMR and NSPS 40 CFR 60.767(I) Tier 4 surface emissions monitoring. Other notable experience Mr. Duffy has includes expanded monitoring, sampling, and laboratory data analysis for landfills with exothermic reactions. He has managed projects to track hydrogen gas generation, target heat extraction, and manage liquids recovery at Republic Services landfills.

Mr. Dumas is a Project Manager of the Risk Management group at SCS. His primary responsibility is to assist facilities that use anhydrous ammonia in addressing EPA’s Risk Management Program (RMP) and OSHA’s Process Safety Management (PSM). Those duties include: Facilitating onsite Process Hazard Analysis studies; Process Safety Management auditing; and Risk Management studies.

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    • Mr. Dumas is a Project Manager of the Risk Management group at SCS. His primary responsibility is to assist facilities that use anhydrous ammonia in addressing EPA’s Risk Management Program (RMP) and OSHA’s Process Safety Management (PSM). Those duties include: Facilitating onsite Process Hazard Analysis studies; Process Safety Management auditing; and Risk Management studies.
      Prior to joining the SCS Tracer Environmental team, Mr. Dumas, was employed as the Maintenance Engineer for Hunter Farms Dairy from 1997-2015. He began his career in 1977 as an Electricians Mate in the US Navy. He has also worked as a maintenance electrician in the plywood and solid rocket fuel industries. Mr. Dumas has three decades of refrigeration experience including over 20 years of ammonia experience in the poultry, fish, and dairy processing industries. He has been involved with PSM/RMP from implementation to law.

Mr. Dunham is a Project Scientist with over three years of experience in the ethanol industry, including compliance for one of the nation’s largest ethanol producers, where he specialize in air compliance and served as the subject matter expert for Title V, Minor Source, and Construction permits across the platform. Mr. Dunham is experienced with state and federal regulatory reporting requirements and has prepared numerous reports for several states. In addition, he has a broad understanding of auditing requirements to maintain compliance with permit regulations and/or internal best management practices. He is well-acquainted with the fossil fuel and mineral exploration industries.

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    • Mr. Dunham is a Project Scientist with over three years of experience in the ethanol industry. Prior to joining SCS Engineers, he oversaw environmental compliance for one of the nation’s largest ethanol producers, specializing in air compliance and serving as the subject matter expert for Title V, Minor Source, and Construction permits across the platform. Mr. Dunham is experienced with state and federal regulatory reporting requirements and has prepared numerous reports for several states. In addition, he has a broad understanding of auditing requirements to maintain compliance with permit regulations and/or internal best management practices. He is familiar with practices associated with the fossil fuel and mineral exploration industries. He is also skilled in field work and several testing and sampling methods related to soil and water.

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Ms. Duran has a diverse background in solid waste management and environmental health. Working with SCS’s Sustainable Materials Management team, she delivers quality technical support to businesses, multifamily dwellings, and government facilities to increase recycling participation, deliver outreach and education, coordinate collection with haulers, and collect data. Her experience in government and the private sector have sharpened her capability to collaborate with multiple types of organizations. She has a Bachelor’s degree in Environmental and Occupational Health Science, with a minor in Sustainability

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    • Ms. Duran has a diverse background in solid waste management and environmental health. Working with SCS’s Sustainable Materials Management team, she delivers quality technical support to businesses, multifamily dwellings, and government facilities to increase recycling participation, deliver outreach and education, coordinate collection with haulers, and collect data. Her experience in government and the private sector have sharpened her capability to collaborate with multiple types of organizations. She has a Bachelor’s degree in Environmental and Occupational Health Science, with a minor in Sustainability

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Mr. Dustman has over 17 years of experience in environmental project management, remedial design activities, building inspection, site assessments, and field training. He has managed over 100 Phase I Environmental Site Assessments (ESAs) and 20 Phase II ESAs. He has conducted required oversight for all remedial actions utilizing EPA-approved project plans and prepared numerous quality assurance project plans (QAPPs); field sampling and analysis plans (SAPs); remedial action plans (RAPs); health and safety plans (HASPs); and reports for emergency responses. Mr. Dustman is a certified asbestos project designer, management planner, and building inspector, a certified air sample professional, and a certified lead-based paint inspector and lead risk assessor.

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    • Mr. Dustman has over 17 years of experience in environmental project management, remedial design activities, building inspection, site assessments, and field training. He has managed over 100 Phase I Environmental Site Assessments (ESAs) and 20 Phase II ESAs. He has conducted required oversight for all remedial actions utilizing EPA-approved project plans and prepared numerous quality assurance project plans (QAPPs); field sampling and analysis plans (SAPs); remedial action plans (RAPs); health and safety plans (HASPs); and reports for emergency responses. Mr. Dustman is a certified asbestos project designer, management planner, and building inspector, a certified air sample professional, and a certified lead-based paint inspector and lead risk assessor.
      He possesses an in-depth knowledge of relevant and applicable Federal, State, and local environmental laws, and protocols. Mr. Dustman has been the project manager for a number of local agencies and private clients, including the U.S. Environmental Protection Agency (EPA) Region 4 Superfund Technical Assessment and Response Team (START) contracts in response to Hurricane Katrina. Mr. Dustman has managed over 100 Phase I Environmental Site Assessments (ESAs) and 20 Phase II ESAs.
      Mr. Dustman has completed numerous lead-based paint inspections and performed several risk assessments. Mr. Dustman has performed numerous mold investigations for both residential and commercial facilities. Mr. Dustman has conducted several smoke/soot investigations.

Amy Dzialowski
Project Director/National Expert on Brownfields Grants
Oklahoma City, OK
National Expert: Brownfields Grants
O. (405) 264-3624

Ms. Dzialowski is our National Expert on Brownfields Grants. She brings over a dozen years of experience to the SCS team, and specializes in brownfields redevelopment, environmental planning, NEPA compliance, natural resource studies and environmental site assessments. As an urban planner with environmental and land use planning expertise, Amy understands the many challenges of environmental compliance and urban redevelopment projects. She works closely with public and private clients to provide advisory services, public engagement, environmental strategies, and risk protection.

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    • Ms. Dzialowski is our National Expert on Brownfields Grants. She brings over a dozen years of experience to the SCS team, and specializes in brownfields redevelopment, environmental planning, NEPA compliance, natural resource studies and environmental site assessments. As an urban planner with environmental and land use planning expertise, Ms. Dzialowski understands the many challenges of environmental compliance and urban redevelopment projects. She works closely with public and private clients to provide advisory services, public engagement, environmental strategies, and risk protection.
      Ms. Dzialowski has directed and provided assistance for many public meetings, forums and stakeholder events. She has also served as the steering committee contact and liaison for several large transportation corridor projects involving multiple jurisdictions and lead agencies. Her experience and commitment to brownfields redevelopment goes beyond the technical to include the identification of funding opportunities, grant application preparation, and grant administration; public outreach, agency coordination and partnership development.
      Contact Amy at 405-264-3624 or

Nathan Eady
Vice President/Project Director/National Expert on Oil and Gas
Santa Maria, CA
National Expert: Oil and Gas
O. (805) 346-6591

Mr. Eady is a Vice President, Project Director, and land-use planner for SCS Engineers where he provides both technical and managerial support for various environmental, regulatory and land use projects. He is also SCS’s National Oil and Gas Expert.

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    • Mr. Eady is a Vice President, Project Director, and land-use planner for SCS Engineers where he provides both technical and managerial support for various environmental, regulatory and land use projects. He is also SCS’s National Oil and Gas Expert. He has nearly 15 years of experience in land-use planning and regulatory compliance. He currently leads SCS Tracer’s Central Coast Compliance environmental services group, overseeing offices in Santa Maria and Bakersfield, California.
      Mr. Eady’s previous professional experience includes employment as a Senior Land Use Planner for the County of Santa Barbara and an Associate City Planner for the City of San Diego. During his employment as a land-use planner, Mr. Eady reviewed development projects for compliance with zoning regulations and environmental law and developed new general plan documents and zoning ordinances for local jurisdictions. In this capacity, he reviewed various development projects, including oil production facilities, for compliance with applicable County codes and completed CEQA review, staff reports, and the public hearing process. This work included coordination with numerous local, state, and federal agencies such as the US Fish and Wildlife Service, Department of Fish and Game, US Army Corps of Engineers, CalTrans, Santa Barbara APCD, Santa Barbara Association of Governments, California Department of Forestry and Fire Protection, California Geologic Survey and the California Department of Housing and Community Development.
      Practice Areas
      Mr. Eady is currently leading the effort to restore and expand production for many of California’s most active oilfields. As part of this process, Mr. Eady is managing the development of several complex land-use permitting and conservation strategies for Santa Barbara County’s major onshore petroleum operators.
      In addition to these land-use permitting services, Mr. Eady also oversees the ongoing environmental compliance efforts for over 20,000 acres of oilfield facilities in northern Santa Barbara County. This includes the routine mapping, inspection and environmental assessment of active, idle and abandoned petroleum facilities.
      Contact Nathan at 805-346-6591 or

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Mr. Early is experienced in the Landfill Gas industry. As SCS’s DataServices® Product Manager, he is responsible for all current and future development of the SCS DataServices module. He also manages the SCSeTools® Support Team, who provides administration for hundreds of sites where SCS DataServices is currently deployed.

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    • Mr. Early is experienced in the Landfill Gas industry. As SCS’s DataServices® Product Manager, he is responsible for all current and future development of the SCS DataServices module. He also manages the SCSeTools® Support Team, who provides administration for hundreds of sites where SCS DataServices is currently deployed. In addition to technical expertise, Mr. Early has been involved in conducting site inspections of LFG collection and control systems and other environmental monitoring and control systems, and evaluating and documenting areas of compliance, concern, and non-compliance; prioritizing and scheduling project audit and training tasks to be completed by SCS’s OM&M compliance technicians; developing, maintaining, and implementing knowledge of federal, state, and local regulatory agency rules and regulations; developing, maintaining, and implementing procedures related to SCS’s Quality Management System (QMS) and related quality assurance/quality control (QA/QC) activities; and locating, attaining, and evaluating various permits to operate. Prior to joining SCS, Mr. Early worked at Fortisar Methane Group, where he was responsible for managing a team of OM&M technicians across 15 landfill sites throughout the US. He was instrumental in implementing improved system performance and efficiencies and in substantially increasing power plant production through a comprehensive investigation of physical systems and detailed multivariate data techniques, including time series and network analysis.

Mr. Edwards is a Senior Project Manager based in our Orlando office. He is an environmental engineer with over 22 years of experience in engineering and project management. He is experienced in environmental design, permitting and construction, as well as facility operations, specializing in solid waste management facilities.

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    • Mr. Edwards is a Senior Project Manager based in our Orlando office. He is an environmental engineer with over 22 years of experience in engineering and project management. Current projects include evaluating potential improvements to transfer stations and stormwater impacts, including new onsite roadways, grading and traffic patterns, and expansions of transfer stations and tipping floors.
      Mr. Edwards also has experience designing and permitting major modifications of landfills, including new grading plans, final cover designs, storm water management systems (primary and secondary) and updated cost estimates for landfill closure and long-term care.

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Mr. Erickson has over 10 years of environmental project experience, with particular emphasis in engineering design of landfill gas (LFG) systems, construction quality assurance (CQA) monitoring, and landfill closure projects. His general civil design project experience includes design of regulatory prescribed landfill covers and liner systems, and LFG system design and equipment selection for over 20 sites in California.

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    • Mr. Erickson has over 10 years of environmental project experience, with particular emphasis in engineering design of landfill gas (LFG) systems, construction quality assurance (CQA) monitoring, and landfill closure projects. His general civil design project experience includes design of regulatory prescribed landfill covers and liner systems, and LFG system design and equipment selection for over 20 sites in California. As part of this work, Mr. Erickson has determined earthwork volume estimates; final grading and drainage configuration; and LFG system design, including blower/flare system (BFS) component sizing, well placement, and affiliated gas pipe sizing for projects in excess of $50 million. In addition to design work, Mr. Erickson has provided CQA monitoring for final closure and LFG system projects throughout California and Mexico, and siting activities for new landfill construction in Brazil. CQA monitoring experience included documentation and inspection of construction activities; certifying work was performed per project drawings and specifications, and correspondence with clients and construction groups. Over the last several years, Mr. Erickson has provided senior oversight of CQA staff for various projects. He has also conducted construction progress meetings and provided design modifications to final grading, drainage facilities, and LFG systems during project construction.

Ms. Essex is a Project Professional in our Richmond, Virginia office. She has experience with landfill design, Landfill Gas system design and permitting, New Source Performance Standards and Title V air permitting and compliance, and solid waste management facilities. She has a Masters degree in Mining Engineering.

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    • Ms. Essex is a Project Professional in our Richmond, Virginia office. She has experience with landfill design, Landfill Gas system design and permitting, New Source Performance Standards and Title V air permitting and compliance, and solid waste management facilities. She has a Masters degree in Mining Engineering.

Mr. Etchells is a professional geologist and hydrogeologist with 19 years of experience assisting clients in managing environmental risks associated with ownership, transfer, or operation of commercial, industrial, and waste disposal properties. His particular technical expertise involves aspects of groundwater science and engineering relevant to contaminated sites and landfills, including supervision and conduct of subsurface data acquisition, remedial design and implementation, conceptual site model development, aquifer testing, extraction well design, groundwater quality evaluation and treatment, statistical analysis, predictive modeling, and contaminated soil and groundwater remediation design.

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    • Mr. Etchells is a professional geologist and hydrogeologist with 19 years of experience assisting clients in managing environmental risks associated with ownership, transfer, or operation of commercial, industrial, and waste disposal properties. His particular technical expertise involves aspects of groundwater science and engineering relevant to contaminated sites and landfills, including supervision and conduct of subsurface data acquisition, remedial design and implementation, conceptual site model development, aquifer testing, extraction well design, groundwater quality evaluation and treatment, statistical analysis, predictive modeling, and contaminated soil and groundwater remediation design. He is responsible for designing analytical, geotechnical, and hydrogeological data collection programs to complete subsurface assessment and remediation. He has prepared subsurface assessment documents, property mitigation plans, vapor intrusion risk assessment documents, soil management plans, aquifer characterization documents, conceptual site models, and groundwater remedial design and implementation documents.
      He has experience with several environmental regulatory entities, including the County of San Diego Department of Environmental Health (DEH), the California State Water Quality Control Board (SWQCB), including Santa Ana/San Diego/Lahontan Regional Water Quality Control Boards (RWQCBs), and the Department of Toxic Substances Control (DTSC).

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Ms. Evans has been working in recruiting since January 2018. She started her career in Agency recruiting and transitioned into Internal recruiting with SCS Engineers. She is the Talent Acquisition Coordinator in our Long Beach, California Office. She has a Bachelors in Communicative Disorders from California State University of Long Beach. She is also a member of the Young Professionals of SCS Engineers.

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    • Ms. Evans has been working in recruiting since January 2018. She started her career in Agency recruiting and transitioned into Internal recruiting with SCS Engineers. She is the Talent Acquisition Coordinator in our Long Beach, California Office. She has a Bachelors in Communicative Disorders from California State University of Long Beach. She is also a member of the Young Professionals of SCS Engineers.

Ms. Drotman has 13 years of experience in environmental consulting, specializing in air quality, environmental assessments, and greenhouse gas (GHG) consulting, reporting, and verification. She has participated in hundreds of GHG verification projects throughout the United States, specializes in air permitting and reporting in California and the Southwest, and has completed approximately 70 Phase I Environmental Assessments (ESAs) in California, Oregon, and Washington. Phase I projects included research and review of geologic and hydrogeologic conditions at project sites and in the surrounding areas, and evaluating the potential for soil and groundwater contamination from on- and off-site sources.

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    • Ms. Drotman is experienced in environmental consulting, specializing in environmental assessment and greenhouse gas (GHG) verification. She has participated in many GHG verification projects throughout the United States, and has completed approximately 70 Phase I Environmental Assessments (ESAs) in California, Oregon, and Washington. Phase I projects included research and review of geologic and hydrogeologic conditions at project sites and in the surrounding areas, and evaluating the potential for soil and groundwater contamination from on- and off-site sources. Ms. Drotman has completed emissions estimates and inventories and has prepared numerous permit-to-construct/operate permit applications. She prepares compliance reports, which includes reviewing and maintaining records and regulatory deadlines. She has also completed evaluations and reporting for federal GHG Rule and Rule AB32 LMR applicability. She has also overseen the construction quality assurance (CQA) for multiple projects types including landfills, methane zones, and contaminated areas, as well as managed field investigations and performed routine inspections on several projects.

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