Contaminated Soil Removal & Remediation Services
Licensed excavation, transport, and disposal of contaminated soils with clean-fill replacement. Petroleum-contaminated sites a specialty across Northern California.
Contaminated soil presents serious environmental and health risks that require professional remediation by a licensed, experienced contractor. Walberg, Inc. provides contaminated soil removal and remediation services throughout Tehama, Butte, Shasta, Glenn, Colusa, and surrounding areas, handling everything from small petroleum spill cleanups to large-scale site remediations involving thousands of cubic yards of impacted soil. With our DOSH certification and HAZ classification on CSLB license #898860, we bring the regulatory credentials and field expertise required for this specialized work.
Petroleum-contaminated soil remediation is one of our core specialties. Former gas stations, auto repair shops, fuel storage facilities, and agricultural equipment yards throughout the Northern Sacramento Valley frequently have soil contaminated with diesel, gasoline, or other petroleum products. When these sites are sold, redeveloped, or undergo tank removal, the contaminated soil must be excavated, tested, transported to licensed disposal facilities, and replaced with certified clean fill. Walberg, Inc. has completed numerous petroleum site cleanups, and our crews understand the sampling protocols, excavation techniques, and disposal requirements that these projects demand.
Beyond petroleum sites, we handle soil contamination from a wide range of sources including industrial chemicals, heavy metals, agricultural pesticides, fire debris residues, and other regulated substances. Each type of contamination requires specific handling procedures, and the disposal pathway depends on the contaminant type and concentration levels. We work closely with environmental consultants and regulatory agencies — including the Regional Water Quality Control Board, the Department of Toxic Substances Control, and local environmental health departments — to ensure that every phase of the remediation meets applicable cleanup standards.
Our contaminated soil removal process is thorough and well-documented. We excavate impacted soil using techniques that minimize the spread of contamination, stockpile material for confirmation sampling, load trucks with lined beds for transport, and haul to licensed disposal facilities that accept the specific waste type. After the contaminated soil is removed, we import certified clean fill, compact it in engineered lifts, and grade the site to final specifications. Throughout the process, we maintain chain-of-custody documentation, waste manifests, disposal certificates, and sampling records that satisfy regulatory closure requirements. With 26 years of experience and over 100 pieces of company-owned heavy equipment, Walberg, Inc. delivers efficient, compliant soil remediation on schedule.
What's Included
- Contaminated soil excavation with cross-contamination controls
- Petroleum-contaminated site remediation
- Confirmation soil sampling coordination
- Transport to licensed disposal facilities (Class II and Class III)
- Certified clean-fill import and placement
- Compaction and grading to engineered specifications
- Underground storage tank (UST) removal support
- Regulatory agency coordination and documentation
- Waste manifesting and chain-of-custody records
- Site closure documentation and reporting support
OUR PROCESS
How we deliver contaminated soil removal.
Environmental Assessment Review
We review the Phase II environmental site assessment, contamination delineation data, and remedial action plan prepared by the project environmental consultant. We develop an excavation plan that addresses the extent of contamination, disposal pathways, and clean-fill requirements.
Regulatory Coordination & Mobilization
We coordinate with the overseeing regulatory agency, secure required permits, arrange disposal at licensed facilities, and mobilize equipment to the site. Health and safety plans are finalized and reviewed with all crew members before work begins.
Excavation, Sampling & Disposal
Our crews excavate contaminated soil following the remedial action plan, maintaining containment to prevent cross-contamination of clean areas. The environmental consultant collects confirmation samples from excavation sidewalls and bottoms. Contaminated soil is loaded into lined trucks and hauled to the licensed disposal facility with proper manifesting.
Clean-Fill Replacement & Site Closure
After confirmation sampling verifies that cleanup standards have been met, we import certified clean fill, compact it in engineered lifts, and grade the site to specified elevations. We provide all documentation needed for the environmental consultant to prepare the site closure report.
EQUIPMENT
Equipment used on this service.
AREAS SERVED
Available across Northern California.
RELATED SERVICES
Other services you might need.
FAQ
Frequently Asked Questions
Contaminated soil is typically identified through a Phase II Environmental Site Assessment conducted by a licensed environmental consultant. Signs that may warrant investigation include a history of fuel storage or dispensing, industrial operations, visible staining or odors in the soil, or results from a property transaction environmental review. We can recommend environmental consultants in our service area if you need an assessment.
Contaminated soil is transported to licensed disposal facilities classified based on the type and level of contamination. Low-level petroleum-contaminated soil may go to a permitted bioremediation facility or Class III landfill, while more heavily contaminated soils are sent to Class II or Class I facilities. We coordinate disposal logistics and obtain disposal certificates for your records.
Costs typically range from $30 to $100 or more per cubic yard depending on the contaminant type, concentration levels, disposal facility fees, and haul distance. Petroleum-contaminated soil from the Northern Sacramento Valley area generally falls on the lower end of this range. We provide detailed estimates based on the remedial action plan and site-specific conditions.
The excavation and backfill phase of a typical petroleum site remediation can be completed in one to two weeks for a former gas station site. However, the overall timeline including environmental assessment, regulatory approval, confirmation sampling, and site closure can span several months. We work to minimize the physical construction timeline and keep costs down.
If a Phase II environmental assessment has identified soil contamination, most lenders will require remediation before financing a property transaction. Even without a lender requirement, California disclosure laws require sellers to disclose known environmental conditions. Completing remediation before sale simplifies the transaction and can improve your property value.