Diversified Environmental Field Services (DEFS) Serving Southern California
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Environmental Field Services for Environmental construction
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Environmental Field Services For Remediation
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Environmental Field Services For Soil Sampling
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Environmental Field Services For Soil Gas Sampling
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Expertise in Regulatory Compliance

We are alert to the latest updates to California’s environmental testing code to meet the rules.

Advanced Technology & Equipment

Our team uses state-of-the-art drilling, sampling, and remediation tools to deliver precise and effective results.

Comprehensive Solutions

Our comprehensive services range from Drilling to soil, Vapor & groundwater sampling, pilot testing, and SVE solutions.

Cost-Effective & Timely Services

We offer affordable, effective solutions to help you meet your project deadlines.

Soil Remedial Action Plan in Glendale, Los Angeles, CA, for effective soil contamination cleanup and site restoration.

Diversified Environmental Field Services (DEFS) Los Angeles, California

Who We Are?

Diversified Environmental Field Services is dedicated to delivering exceptional service solutions designed to meet the evolving needs of our clients. As a service-oriented contracting company, we are committed to quality, reliability, and customer satisfaction.

With a team of experienced professionals and a customer-first philosophy, we pride ourselves on building long-term relationships based on trust, transparency, and results. From day one, our focus is on understanding your unique needs and delivering services that add value to your business every step of the way.

DEFS Being a Trusted Environmental Specialist In Los Angeles, California

Diversified Environmental Field Services (DEFS) is a full-service environmental field services company. We are a team with an experienced crew of more than 20 years of industry knowledge, and we know the field well. 

We have all the knowledge necessary to support environmental projects with accuracy and reliability. In the role of a reliable environmental field solutions subcontractor, we cooperate with environmental consulting companies to carry out the field operations that are required in Phase II, Phase III Environmental Site Assessments.

Accurate sub-slab vapor pin services in Glendale for safe environmental solutions.

Main Services We Offer in Southern California

Environmental Pilot Testing Services-1

Pilot Testing Services

DEFS offers on-site environmental pilot testing to quickly assess and fine-tune remediation strategies, helping you save time, reduce costs, and ensure effective cleanup.

Remediation Services

Our remediation services include soil vapor extraction (SVE), dual-phase vapor extraction (DPVE), air sparging, equipment installation, and ongoing system operation and maintenance for effective in-situ cleanup of soil and groundwater contamination.

Environmental Construction Services

DEFS offers full-service environmental construction, including excavation, piping, and system installation for remediation technologies like SVE, DPVE, and pilot testing.

Soil sampling

Soil Sampling

DEFS provides accurate environmental and geotechnical soil sampling services to help you assess contamination risks and support safe, compliant construction planning.

Environmental field services in Hancock Park, Los Angeles, CA.

Soil Gas Sampling

DEFS provides precise soil gas sampling services using advanced equipment and certified technicians to help environmental consultants assess subsurface contamination accurately and efficiently.

Direct Push Drilling service by DEFS

Drilling Services

DEFS offers efficient and eco-friendly Direct Push Drilling services for quick subsurface sampling, soil testing, groundwater monitoring, and environmental site assessments.

At DEFS, we simplify regulatory compliance for environmental consulting firms across Southern California by providing a comprehensive range of field services tailored to their needs.

Contact Us Today

Call us for free estimate today! 

How Does Diversified Environmental Field Services (DEFS) Work?

A very direct and step-by-step method is used by us to supply services in the field of environment which are on a high level.

Step 1: Initial Consultation & Assessment

The first thing to do is to do a comprehensive site analysis and to get to know everyone’s different needs.

Step 2: Data Collection & Testing

Make soil, groundwater, and vapor sampling procedures.

Step 3: Compliance Review & Remediation Planning

Customize and make improvement actions.

Step 4: Remediation & Cleanup

Carry out the decontamination of a site and correct the issues.

Step 5: Ongoing Monitoring & Compliance Reporting

Monitor the site after remediation activities.

Our Team

Today more than ever, clients require quick, reliable, and cost-effective results throughout their projects. The breath of DEFS’s technical experience and comprehensive knowledge in the environmental field services has enabled the firm to provide cost-effective services. We combine our expertise with innovative tools and equipment to maximize efficiency. We provide our services as a sub-contracting company to environmental consulting clients in a wide range of areas.

Dual Phase Extraction Installation and Environmental Construction

Common Questions

FAQs About Environmental Field Services in Southern California

We provide a wide range of field services, including soil, groundwater, and soil gas sampling; soil vapor extraction (SVE) and dual-phase vapor extraction (DPVE) system installation and operation; monitoring well installation and abandonment; pilot testing; trenching and piping; demolition; backfilling and surface restoration; and methane barrier testing and compliance work.

Our clients include environmental consultants, engineers, geologists, hydrogeologists, and environmental science firms who need trusted field support for Phase I, II, and III environmental site assessments and remediation projects.

Yes, we offer complete field support for pilot testing, including equipment setup, flow and vacuum testing, data collection, and system performance reporting.

Absolutely. Our field staff includes HAZWOPER-certified technicians, experienced drillers (C-57 license if required), and trained equipment operators with extensive knowledge of environmental site protocols.

Yes, we comply with California’s prevailing wage laws and provide certified payroll documentation for public works and government-funded projects when required.

Yes. We regularly operate as an extension of our client’s team, following their direction and protocols to maintain consistency and quality control across projects.

We strictly adhere to OSHA and site-specific health and safety plans (HASPs). Our technicians conduct daily tailgate meetings, use appropriate PPE, and follow all confined space, air monitoring, and decontamination procedures.

Yes. We own and maintain a full inventory of field equipment including vacuum blowers, vapor extraction trailers, air compressors, flow meters, sampling tools, and support vehicles.

We provide detailed field logs, photo documentation, chain-of-custody forms, vacuum and flow data, and daily reports to ensure our consulting clients have all the data needed for regulatory and reporting purposes.

Yes. We carry general liability and workers’ compensation. Bonding can also be provided upon request, depending on project needs.

We are based in Los Angeles and primarily serve projects throughout Southern California, including Los Angeles, Orange County, San Bernardino, Riverside, and Ventura. We are open to traveling statewide for larger projects.

What Our Customer Say

“Don’t take our word for the proof. Hear What Our Customers Say

Mr. Gilani and his team are very knowledgeable and helpful. They made my project go smoothly. Highly recommend them for your site investigation needs!

Elaine Petkovsek

The Diversified team is always thorough and very professional. They provide quality work and excellent customer service.

Pavlo Chrysovergis

Amazing service and professional team! Always respectful, on-time and care about job to get done. We will definitely hire this company again for our projects in SoCal.

Alireza Zadeh

mr keyvon geloni did drielling at my place . and install monitoring wells .with his team i was so sattisfay not only with his work also with his attitude and his caractor .his was on time and good prorofacianal team . his price was very resonable . he work with us . i coud never use any one else alse excepit this company . . if i have a choice i would only choise him . he is the best .do not make amastaike . my cousin use another company he got squorud . paid $49000.00 mor and not happy with the job. i dont now how to thank him and his company for the work they finesh .

simon massachi

Contact Us Today

DEFS partners with environmental consultants and engineering firms to deliver expert-level services in site assessment, sampling, and remediation system installation. Whether you need field crews for soil, vapor or groundwater sampling, vapor extraction or pilot testing, our experienced technicians are ready to assist in Southern California.