History

34+

Years of
Experience

The Team Behind the World’s Toughest Remediation Sites

Environmental remediation projects often stall when contamination lies beneath buildings, highways, rail lines, or active facilities, places that vertical wells simply can’t reach.

Directional Technologies solves these challenges with far more than drilling. Our engineers, geologists, and directional drilling specialists work with environmental consultants to design and install horizontal remediation well systems that access contamination in difficult locations.

From system planning to precision installation, we help remediation technologies reach the plume and move projects forward when conventional approaches fall short.

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Industry Firsts and Innovation

Directional Technologies has helped pioneer the use of horizontal wells for environmental remediation worldwide.

Notable projects include:

First horizontal dual-phase extraction well installed in South Korea
First horizontal wells installed in Australia for in-situ chemical oxidation and biosparging
First horizontal ozone sparge wells installed in Alabama

These projects represent just a small portion of the innovative applications our team has supported. We continue to work with environmental engineers, consultants, and researchers to expand the capabilities of horizontal remediation systems.

1992

Company Founded

Mike and Kathy Sequino founded Directional Technologies to apply horizontal directional drilling to difficult underground challenges in the environmental and utility industries.

1993

First Horizontal Remediation Well Installed at a commercial airport

DTI installed horizontal wells at New York’s John F. Kennedy International Airport. The Port Authority of New York and New Jersey selected DTI to install test wells to determine the feasibility of using horizontal wells. Based on the success of this project, more than 50 horizontal wells totaling more than 50,000 feet have been installed under the airport. At that time, it was the largest remediation project in the world using horizontal remediation wells. This was the first use of mid-sized rigs, which is responsible for the industry as we know it today.

1994

Horizontal Injection Well

Bio-Genesis Inc. was contracted to design a system for performing in situ bioremediation of soil and groundwater under two homes. Directional Technologies, Inc. was selected as the drilling company for these horizontal wells. Multiple wells from 50’ to 150’ total length were installed in 2 days at a depth of 3-5’ below surface in a glacial till formation.

1995

Horizontal Dual Phase Extraction Wells for Improved Performance

Proven vertical technology transposed. Dual Phase Extraction (DPE) brought power to in-situ remediation techniques, and when performed with horizontal wells, it empowered the technology to tackle hard-to-reach plumes.

1997

First Horizontal Remediation Well Seminar

Directional Technologies presents horizontal remediation wells as a new tool to environmental professionals. The power of environmental horizontal wells vs. traditional remediation methods demonstrated that horizontal wells provided greater access to the plumes and rapidly cleaned up sites. Since that first seminar, the company has presented across the country and around the world.

1997

First Horizontal Soil Sample

DTI designed custom tooling to access a plume under a commercial building to identify the contaminant causing vapor intrusion issues.

1998

First Dual Purpose HRW

DTI installs the first dual-purpose horizontal well at a Sunoco facility for both free product recovery and biosparging.

2001

World Trade Center 911 Twin Towers Site

Directional Technologies deploys to the Twin Towers on 9/11 to assist the NYFD with searching for survivors using our HDD technology. In the wake of the September 11th attacks, the company’s expertise was enlisted to aid in the critical rescue and recovery efforts at the World Trade Center, installing essential utility conduits in one of the most challenging environments imaginable.

2004

First Groundwater Extraction Well

Aquaterra 1 6 in HDPE groundwater extraction well offset and below a 60-inch brick catch basin outflow into the Delaware River. The first time a horizontal well was used for groundwater extraction was to protect the infiltration into an existing pipe. The job was so successful that additional horizontal Wells were installed at the site over the years.

2012

South Korea

DTI goes international, with the first horizontal remediation wells installed in South Korea, accessing the source area of a former rail-yard foundry. Dream Hub is a massive $40 billion redevelopment project in the heart of Seoul, South Korea, encompassing an international business district spanning over 34 million square feet and hosting what is to be the tallest building in Asia, thus, landing Seoul on the map of cities with the world’s tallest skyscrapers. The site for this redevelopment formerly served as the rail yard foundry and locomotive maintenance center for Korea Rail (KORAIL) for over 100 years, resulting in significant environmental impacts on both soil and groundwater throughout the site.

Link to internal doc: https://docs.google.com/document/d/1chnEKgWCNfHgaG-qNAfE3q6JLoI7B6kG/edit

2013

Keynote at Clean Up Conference, Melbourne, Australia

Mike Sequino presented Horizontal Remediation Wells (HRW): Transferring Effective Technologies From the Oil Industry to Environmental Remediation demonstrated the techologies abilitiy to continue business operations, get to the source, lower the cost per volume of treated soil, more efficiently deliver and recover, and the flexibility of multiple uses for one horizontal conduit.

2013

Aqualine Glouster Installation

Directional drilling to the rescue! This project solved a long-time problem of water main breaks for the City of Gloucester by installing a new main under the Annisquam River.

Gloucester, MA, a city split in half by the Annisquam River, has had a notorious history of water main breaks, leaving parts of the city without H2O for extended periods. Desperate to solve this long-time problem, the city of Gloucester is working with the prime contractor Aqua Line Utility Contractors and the directional drilling company Directional Technologies, Inc. to install a 1,200-foot PVC (polyvinyl chloride) water main pipe in hopes of solving their water worries once and for all. While this $2.5 million project initially may have left some tax payers wary, the new water main has already proved to not only be money well spent, but also be the solution to their problems.
Links: https://documentcloud.adobe.com/gsuiteintegration/index.html?state=%7B%22ids%22%3A%5B%221iDxZlA1cJGGAf0P7WxBqSz-vvkWGcaEX%22%5D%2C%22action%22%3A%22open%22%2C%22userId%22%3A%22110795606676531336662%22%2C%22resourceKeys%22%3A%7B%7D%7D

Find link to the Gloucester Time article.

2015

Horizontal Wells for Hydraulic Control at JFK International Airport

Directional Technologies receives the prestigious National Association of Environmental Professionals (NAEP) Environmental Excellence Award for Best Available Technology, recognizing their groundbreaking remediation work (Horizontal AS/SVE) at a major international airport.

Link: https://www.naep.org/index.php?option=com_content&view=article&id=222:eea2015awardrecipients&catid=19:site-content

2017

HRW in Australia

During the summer of 2017, Directional Technologies, Inc. was provided with the unique opportunity to partner with several Australian and American companies to successfully design and install horizontal remediation wells (HRWs) at a chemical manufacturing facility in Sydney.

2017

Horizontal Nested Well

The target zone for soil vapor extraction was approximately 30 feet below ground surface. The original remedial design specified a grid of 32 total vertical SVE wells. When combined with the connective piping required to connect all the proposed vertical wells to the system location, the vertical well design would be a highly invasive remedial approach, which would prevent redevelopment of the site.

https://docs.google.com/document/d/1N_rgQ8RcMMx5nv65e064e2W4_OhNg1C-/edit

2020

ABC Excellence in Construction Award

The company solves a challenging conduit installation in Connecticut during frozen conditions. Specialty Trade See Video: https://www.youtube.com/watch?app=desktop&v=0JEPPxWgwPo

2025

Blind 6-inch Gravity Drain Installed

April 2025 - Columbus, OH - The DTI team installed a blind (single-ended/no-exit) gravity drain approximately 600ft long using Percision Pull™ technology, holding a pitch of 1%. This installation is the largest blind installation ever completed. The master drillers and locators at DTI maintained the target grade throughout the bore.

The contractor challenged DTI to install the gravity drain blind to meet an existing invert. Drilling to the existing invert without exiting the HDD bore, DTI saved the end client time and money.

2025

Second Generation Takes Over

Kathy and Mike’s daughter and son (Meg & Michael) become the principal operators of the business, bringing DTI into the second generation.

Why Environmental Teams Work With Directional Technologies

Engineering-Driven Approach

Our team includes engineers and geologists who help design horizontal well systems that perform.

5,000+ Horizontal Wells Installed

Decades of field experience across complex environmental remediation sites worldwide.

Access Where Others Cannot

Horizontal wells allow remediation beneath buildings, railroads, highways, tanks, and active facilities.

Proven Remediation Performance

Horizontal well systems often accelerate site cleanup by increasing contact with the contaminant plume.

Experience That Shows Up in the Field

Experience matters when remediation projects involve complex sites, tight access, and little room for error. For more than three decades, Directional Technologies has worked alongside environmental consultants to install horizontal remediation systems at sites where conventional approaches fall short.

Our experience includes supporting remediation systems such as:

Soil Vapor Extraction (SVE)
Dual-Phase Extraction (DPE)
Air Sparging and Biosparging
In-Situ Chemical Oxidation (ISCO)
Groundwater Recovery Systems
Custom Horizontal Remediation Applications

Industry Firsts and Innovation

Directional Technologies has helped pioneer the use of horizontal wells for environmental remediation worldwide.

Notable projects include:

First horizontal dual-phase extraction well installed in South Korea
First horizontal wells installed in Australia for in-situ chemical oxidation and biosparging
First horizontal ozone sparge wells installed in Alabama

Our values

Safety

Ensuring the well-being of all employees and project partners takes priority in every action, both in the office and the field.

Integrity

Consistently upholding honesty, transparency, and principled behavior in actions and decisions.

Teamwork

We thrive through collaboration and recognize that we can only succeed if we work together. Bold, innovative visions require transparency and coordination.

Innovation

Improve how we work, make our processes more efficient, and always drive toward better results. Develop solutions that solve current challenges and anticipate future needs.

Professionalism

Exceeding standards to drive efficiency and enhance customer experience through reliability, competence, respect, and integrity. It is reflected in how we treat others with dignity, act appropriately, and take initiative, always going above and beyond expectations. Our commitment to continuous improvement and high standards ensures both exceptional employees and a successful company.

Solving Complex Remediation Challenges

Horizontal remediation wells are not always the first solution considered. But when contamination lies beneath infrastructure, when vertical wells fail, or when cleanup timelines stall, horizontal wells can provide a powerful alternative.

Directional Technologies brings the engineering expertise, drilling precision, and field experience needed to make these systems successful.

If you are evaluating horizontal remediation wells for your next project, our team is ready to help.

LET'S TALK

Horizontal Directional Drilling

Reliable underground installation with minimal surface impact.

Environmental

Solutions to assess, remediate, and protect your site.

Ground Water

Effective groundwater control and well services.

Design

Engineering and planning built for real-world conditions.

Maintenance & Rehabilitation

Extend asset life with proactive maintenance and repair.

Need help choosing the right service?

Our team can help you find the best solution for your project.

The Team Behind the World’s Toughest Remediation Sites

Industry Firsts and Innovation

Company Founded

First Horizontal Remediation Well Installed at a commercial airport

Horizontal Injection Well

Horizontal Dual Phase Extraction Wells for Improved Performance

First Horizontal Remediation Well Seminar

First Horizontal Soil Sample

First Dual Purpose HRW

World Trade Center 911 Twin Towers Site

First Groundwater Extraction Well

South Korea

Keynote at Clean Up Conference, Melbourne, Australia

Aqualine Glouster Installation

Horizontal Wells for Hydraulic Control at JFK International Airport

HRW in Australia

Horizontal Nested Well

ABC Excellence in Construction Award

Blind 6-inch Gravity Drain Installed

Second Generation Takes Over

Why Environmental Teams Work With Directional Technologies

Engineering-Driven Approach

5,000+ Horizontal Wells Installed

Access Where Others Cannot

Proven Remediation Performance

Experience That Shows Up in the Field

Industry Firsts and Innovation

Our values

Safety

Integrity

Teamwork

Innovation

Professionalism

Solving Complex Remediation Challenges

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