Environmental Investigation and Site Characterization Services to Develop Effective Remedial Plans

If you find yourself dealing with concerns related to contamination at your site, understanding the severity of your environmental problem, or seeking effective plans for remediation and site closure, you’ve come to the right place.  Our team of hydrogeologists and engineers is dedicated to investigating and characterizing the nature and extent of contamination, ensuring a comprehensive understanding of your unique situation. Through our expertise, we facilitate clear communication of the environmental complexities you face, empowering you to make informed decisions. Moreover, we work diligently to develop personalized and sustainable remediation strategies, providing you with the confidence and peace of mind you deserve.

With Hargis, you can

  • Investigate and characterize the nature and extent of contamination at a site
  • Understand and communicate the extent of your environmental problem
  • Develop plans for remediation and site closure

Environmental Sampling for a Wide Range of Contaminants

We offer comprehensive environmental sampling services designed to address a wide spectrum of contaminants that may be present at your site. Our team of skilled professionals utilizes state-of-the-art sampling techniques and equipment to investigate and characterize the nature and extent of various pollutants that may be affecting your environment. Whether it’s soil, water, air, or other media, we are equipped to conduct thorough and precise sampling to identify contaminants and assess their potential impact. With years of experience and a commitment to excellence, we understand the importance of accurate data in environmental assessments. Rest assured that our environmental sampling services will provide you with the critical information you need to make informed decisions and develop effective remediation plans for a healthier and sustainable future.

Chlorinated Solvents: Chemicals often used in industrial processes and manufacturing that can contaminate soil and groundwater, posing significant health and environmental risks.

Pesticides and Herbicides: Chemicals used in agriculture and pest control that can find their way into the environment, potentially contaminating soil and water sources.

Emerging Contaminants: These may include perfluorochemicals like per- and polyfluoroalkyl substances (PFAS), Perfluorooctane sulfonic acid (PFOS), pharmaceuticals, personal care products, and other synthetic chemicals that are not yet regulated but have the potential to affect the environment and human health.

Heavy Metals: This class includes elements like lead, mercury, arsenic, cadmium, and others, which can be released into the environment through industrial processes, mining activities, or natural occurrences.

Volatile Organic Compounds (VOCs): These are organic chemicals that can easily evaporate into the air and may be found in groundwater or soil due to various industrial activities or improper waste disposal.

Petroleum Hydrocarbons: Contaminants such as gasoline, diesel fuel, and oil that can seep into the soil and groundwater from leaking underground storage tanks, spills, or improper handling.

Polycyclic Aromatic Hydrocarbons (PAHs): These are a group of organic compounds that are formed during the incomplete burning of coal, oil, gas, or other organic substances and can contaminate soil and water.

PCBs (Polychlorinated Biphenyls): These are synthetic organic chemicals formerly used in electrical equipment and hydraulic fluids, but now banned due to their harmful effects on the environment and health.

Types of Project Sites

We specialize in handling a diverse array of project sites, each presenting its unique environmental challenges. Whether your goal is regulatory compliance, risk management, commercial property transfer, or proactively improving environmental conditions, we understand the obstacles you face and how to help you push past them.  No matter the complexity or scale, we are dedicated to delivering exceptional environmental investigation and remediation services across a wide range of project sites.

Multi-Media Sites: These sites are characterized by contamination of multiple environmental mediums, including air, groundwater, soil, and soil gas, requiring comprehensive investigation and remediation strategies.

Multi-Contaminant Sites: Such sites present a complex challenge as they may contain multiple sources of contamination and various contaminants, necessitating sophisticated assessment techniques to identify and address all pollutants effectively.

Multi-Phase Sites: These sites involve a combination of dense Non-Aqueous Phase Liquids (DNAPL), Light Non-Aqueous Phase Liquids (LNAPL), and vapor phase transport, demanding specialized expertise to manage the intricate behavior and migration of different phases of contaminants.

CERCLA Superfund Sites, RCRA Sites, State Superfund Sites: These high-profile sites are subject to federal and state regulations and may require extensive remediation efforts due to the presence of hazardous substances, demanding compliance with strict protocols.

Commercial Property: Environmental concerns in commercial properties, such as gas stations or industrial facilities, necessitate expert assessment to identify potential contaminations and ensure compliance with environmental regulations during property transactions.

Legacy and Active Industrial Sites: Industrial sites often face environmental challenges arising from previous, or former, processes and activities.  This may involve multiple sources, multiple contaminants requiring comprehensive investigations, and tailored remediation plans to ensure environmental compliance and sustainable practices.

Indigenous Lands: Environmental projects on indigenous lands require cultural sensitivity and collaboration, respecting the unique environmental concerns and heritage of these communities while delivering effective remediation and sustainable solutions.

Environmental Consulting Services


We are committed to delivering innovative solutions to address your environmental challenges within your budget and timeframe. Our services encompass a wide range of techniques and methodologies to provide you with the critical information needed for informed decision-making and effective remediation strategies.

With a commitment to excellence and innovation, Hargis is your trusted partner for all your environmental investigation and site characterization needs. Our team of experts is dedicated to delivering practical, sustainable, and cost-effective solutions to safeguard both the environment and your project’s success.

Site Investigations: Our skilled team conducts thorough site investigations using both traditional and innovative techniques. This includes large-scale groundwater monitoring well installations, direct-push drilling, vertical profiling, and temporary small-diameter wells, enabling us to gather accurate data on the nature and extent of the contamination.

Vapor Assessments: We specialize in conducting vapor intrusion assessments and mitigation at various sites, including residential, commercial, and industrial buildings. Our expertise ensures that potential risks from vapor intrusion are identified and addressed appropriately.

Environmental Sampling: To gain comprehensive insights into contaminant investigations, we perform a full range of soil, soil vapor, groundwater, and separate phase liquids sampling. Our precise sampling techniques and strict quality control procedures help identify the presence and concentration of pollutants accurately so you can make decisions with confidence.

Improving Groundwater Quality: Our hydrogeologists and engineers use the latest technologies to assess groundwater behavior, identify contamination sources, and implement effective solutions, ensuring the preservation of this vital resource for a sustainable future.

Groundwater Modeling: Our advanced groundwater modeling capabilities play a pivotal role in providing the necessary data to inform crucial decisions regarding supply and storage, impact assessments, engineering design, permitting, and groundwater stability. By analyzing groundwater flow and behavior, we develop sophisticated numerical and conceptual site models that support risk evaluations, feasibility studies, remediation pilot testing, and tailored engineering solutions, ensuring efficient and sustainable groundwater management.

Environmental Modeling: We develop sophisticated numerical and conceptual site models that support various aspects of environmental assessments. From risk evaluations to feasibility studies and engineering design, our environmental modeling services play a crucial role in making informed decisions and implementing successful remediation strategies.

Additional services include:

  • Program Management: Performing overall environmental program management including designing, permitting, contracting, and constructing remediation systems
  • Financial Analyses: Preparing environmental liability cost evaluations, including determinations for allocation, financial assurance, and environmental reserves
  • Compliance: Performing extensive groundwater and soil investigations for regulatory compliance at CERCLA/Superfund sites, RCRA facilities, and Arizona and California State Superfund Sites
  • Waste Minimization: Minimizing Investigation Derived Waste generation through the use of direct-push soil and soil vapor assessments and low-volume groundwater purge/sampling methods

Benefits of Hiring Trusted Environmental Consultants

When it comes to environmental investigation and site characterization, hiring trusted environmental consultants can make all the difference. Our team brings invaluable expertise, experience, and industry knowledge to ensure that your project is conducted in compliance with environmental regulations and best practices. Here are some key benefits of working with the engineers and hydrogeologists at Hargis:

Trusted environmental consultants have the expertise and experience to handle complex environmental projects. They are well-versed in regulatory requirements, industry standards, and best practices. Their in-depth understanding of environmental processes, contamination risks, and remediation techniques allows them to provide accurate assessments, reliable data, and effective solutions tailored to your specific needs.

Access to Latest Technologies and Tools
Environmental consultants stay up-to-date with the latest technologies and tools used in environmental investigation and site characterization. They have access to state-of-the-science equipment, software, and laboratory facilities, ensuring accurate data collection and analysis. By leveraging these technologies, consultants can provide you with reliable results, faster turnaround times, and cost-effective solutions.

Regulatory Compliance
Navigating the complex world of environmental regulations can be challenging. Trusted environmental consultants are well-versed in local, state, and federal regulations and can guide you through the compliance process. They ensure that your project meets all necessary environmental requirements, avoiding costly fines, delays, or legal issues. By working with consultants, you can have peace of mind knowing that your project will proceed smoothly, in full alignment with regulations, and with minimized environmental risks, enabling you to focus on your goals with confidence.

Featured Project

Continuous Air Sampling for Tetrachloroethylene Vapor Intrusion Investigation

Continuous Air Sampling for Tetrachloroethylene Vapor Intrusion Investigation
Hargis + Associates, Inc. (H+A) collected grab and integrated indoor air samples during two sampling events eight months apart at an active print shop located within a hazardous waste site in Phoenix, Arizona.

Featured Blog

Considering Heterogeneity in Site Characterization and Remedy Design
Subsurface site conditions are complex. When it comes to environmental remediation, understanding the hydrogeologic conditions is critical in achieving effective remediation and regulatory compliance.


Request a quote for your upcoming project


Request a quote for your upcoming project
Click Here