We are alert to the latest updates to California’s environmental testing code to meet the rules.
Our team uses state-of-the-art drilling, sampling, and remediation tools to deliver precise and effective results.
Our comprehensive services range from Drilling to soil, Vapor & groundwater sampling, pilot testing, and SVE solutions.
We offer affordable, effective solutions to help you meet your project deadlines.
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.
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.
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.
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.
DEFS offers full-service environmental construction, including excavation, piping, and system installation for remediation technologies like SVE, DPVE, and pilot testing.
DEFS provides accurate environmental and geotechnical soil sampling services to help you assess contamination risks and support safe, compliant construction planning.
DEFS provides precise soil gas sampling services using advanced equipment and certified technicians to help environmental consultants assess subsurface contamination accurately and efficiently.
DEFS offers efficient and eco-friendly Direct Push Drilling services for quick subsurface sampling, soil testing, groundwater monitoring, and environmental site assessments.
Call us for free estimate today!
DEFS’ expertise is in environmental field services, and we serve environmental consultants, engineers, geologists, hydrogeologists, and environmental science firms in all the following counties in Southern California.
Ventura County professionals rely on DEFS for precise soil gas sampling and remediation support tailored to complex coastal and agricultural environments. We assist with advanced drilling and vapor testing techniques to offer accurate data and effective cleanup strategies.
San Diego County consultants trust DEFS for dependable soil, gas, and groundwater services that support remediation and redevelopment projects. Our experienced field technicians deliver quality sampling and drilling solutions across urban and coastal sites.
In San Bernardino County, DEFS partners with geologists and engineers to conduct pilot testing, methane gas testing, and deep subsurface investigations. Our direct push and hollow stem auger drilling methods ensure accurate, timely results in challenging soil conditions.
DEFS offers Riverside County environmental firms efficient groundwater sampling, soil testing, and vapor pin installation to support site development. Our team works closely with consultants and engineers to provide field data that meets regulatory demands and helps in their project's progress.
In Orange County, DEFS delivers reliable drilling and vapor intrusion services that help geologists and remediation specialists meet tight project deadlines and agency standards. Our limited-access drilling and sub-slab vapor pin installations are ideal for working in commercial and residential zones.
DEFS supports environmental consultants and engineers in Los Angeles County with expert soil, gas, and groundwater sampling for site investigations and regulatory compliance. From pilot testing to methane gas surveys, our field services offer environmental assessments across urban and industrial sites.
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.
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.
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.
“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!
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 .
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.
Diversified Environmental Field Services (DEFS) as a sub-contractor offers a broad range of environmental field services. We provide our services to environmental consulting companies.
