The load came up dark. On a redevelopment lot east of downtown Tampa, the bucket pulled a scoop that did not match the sandy fill around it. Streaked, heavy, wrong. The operator set it down well away from the clean pile and stopped the dig. That single call is where a clean project and a six-figure liability split apart.
Most crews know how to move dirt. Far fewer know what to do the moment it comes up wrong. Contaminated soil removal in Tampa Bay is its own discipline, and it runs on a four-step process that never changes: isolation, excavation, hauling, and documentation. Cut one step and the problem follows the material wherever it goes. Here is how the work actually gets done, what Florida law requires, and what it costs.
What Counts as Dirty Dirt
“Dirty dirt” is the trade name for contaminated soil: excavated or imported ground that cannot legally be reused as clean fill and has to go to a permitted disposal facility. It comes in three forms.
- Chemically contaminated soil. Ground carrying petroleum, heavy metals, or solvents. It can look and smell completely normal, which is what makes it dangerous.
- Debris-mixed fill. Soil laced with concrete, asphalt, glass, and demolition waste. Visually clean is not the same as legally clean.
- Structurally unsuitable muck. High-organic clay and saturated fill that will not pass compaction. Florida has more of it than most states.
In a region built on decades of gas stations, dry cleaners, and old industrial land, dirty dirt is the norm on a redevelopment parcel, not the exception. For the full breakdown of why Florida has so much of it, see our explainer on what dirty dirt is.
Is Contaminated Soil Hazardous Waste, and Who Is Liable?
Most of it is not. Whether soil is legally hazardous depends on a lab test, not on how it looks or smells. The party that produces the waste, the generator, has to make that determination under federal rule 40 CFR 262.11, usually with a leaching test called the TCLP. In Florida, most petroleum-contaminated soil comes back non-hazardous and goes to a lined landfill or a soil treatment facility, not a hazardous waste site.
What does not change is who carries the risk. Under federal law the responsibility runs cradle to grave. The generator, usually the property owner, stays liable for that soil even after it is hauled away and even after it is buried somewhere else. That is the real reason the documentation step matters. Done right, it is the only thing that ends the liability.
The Site Serve Dirty Dirt Process, Step by Step
Four steps, same order, every job.
Step 1: Isolation
Contamination only runs one direction. Clean soil mixed with contaminated soil becomes contaminated soil, and the reverse never happens on its own. So the first job is keeping the two apart.
Picture fifty yards of impacted soil dumped onto a thousand-yard clean stockpile. The pile does not average out. All 1,050 yards now carry the worst material in the batch, and every yard has to be hauled at the contaminated rate. A fifty-yard problem becomes a fifty-thousand-dollar one.
It starts at the bucket. The operator reads the obvious signs first: a petroleum sheen, a solvent or sulfide odor, oily staining against native Florida tan, fill laced with concrete and debris. When the signs are not obvious, the crew screens the soil with an organic vapor analyzer and pulls anything reading at or above 10 parts per million into its own stockpile. If it sheens, it gets isolated no matter what the meter says. Each kind of dirty dirt gets its own lined, bermed, covered pile, because each travels a different path at a different price. Under Florida rule 62-780.525, a stockpile cannot sit longer than 60 days, and soil staged on a right of way has to move within 30.
Step 2: Excavation
Removing the soil is the visible part. Removing it without spreading the contamination is the skill. The crew strips and stockpiles the clean overburden first, then works in shallow lifts from clean material toward the contaminated core, so a loaded bucket never drags back across a clean face. Every lift gets screened in real time.
Florida sits low and wet, and that changes everything past a few feet. Most digs of any depth reach groundwater before they reach clean soil, and water that floods a contaminated cut cannot be pumped to the nearest inlet. The state construction dewatering permit covers clean groundwater only. Contaminated water has to be treated or hauled off. In a high water table region, dewatering is part of the dig, not a side task.
When the cut is done, the crew proves it. Confirmation samples come off the floor and walls and go to a lab, where the numbers are measured against Florida’s Soil Cleanup Target Levels in Chapter 62-777. Those targets are strict and public.
| Contaminant | Residential limit (mg/kg) | Commercial limit (mg/kg) | Common Tampa Bay source |
| Arsenic | 2.1 | 12 | Old citrus and grove land |
| Lead | 400 | 1,400 | Aging industrial sites, paint |
| Benzene | 1.2 | 1.7 | Petroleum, leaking tanks |
| Total PCBs | 0.5 | 2.6 | Old electrical equipment |
| Mercury | 3.0 | 17 | Manufacturing |
Florida DEP direct-exposure Soil Cleanup Target Levels, Chapter 62-777, F.A.C. Lower numbers are stricter.
If a wall or floor sample comes back over the target, the answer is not optional. Over-excavate in that direction and sample again until it clears. Throughout, the work runs under OSHA’s HAZWOPER standard for hazardous waste work, with air monitoring setting the crew’s level of protection.
Step 3: Hauling
Every load that leaves the site is covered, because Florida law requires it. Statute 316.520 makes it the driver’s duty to keep dirt and aggregate from blowing or spilling onto a public road, and a close-fitting tarp is how you comply.
Where the load goes depends on the test. Non-hazardous soil moves under a bill of lading tied to an approved waste profile, to a lined Class I landfill or to a soil treatment facility permitted under Chapter 62-713 that runs the soil through thermal desorption, burns off the petroleum, and recycles the cleaned material. Two of those thermal facilities sit right next to Tampa Bay, in Manatee and Polk counties. Soil that tests hazardous becomes a manifested shipment to a hazardous waste landfill out of state. What none of it can ever do is go to a clean fill site. A contractor who dumps contaminated soil on a clean fill receiver has just handed a new liability to whoever took it.
Every truck crosses a certified scale, and the weight ticket becomes part of the record.
Step 4: Documentation
The first three steps move the dirt. The fourth proves it was handled legally, and it is the step that protects whoever owns the ground. It starts with chain of custody, a signed record of who held every sample and every load from the field, to the lab, to the disposal gate. The testing has to be defensible, which means a Florida-certified, NELAP-accredited lab running standard EPA methods. The signed manifest comes back from the facility confirming it took the load. The weigh tickets reconcile, ton for ton, what left the site against what arrived. For hazardous waste, federal rule requires those records be kept at least three years.
When the site itself was under a cleanup, the closing document is a Site Rehabilitation Completion Order from Florida DEP, confirming the soil met the target levels and the case is closed. A complete file answers three questions with paper instead of testimony: what was the dirt, where did every ton go, and who certified it. Answer all three and the contamination claim has nowhere to resurface years later, when a buyer’s Phase I assessment runs ahead of a sale and a lender will not close without it.
The Florida Rules That Govern Dirty Dirt
| Rule | What it requires |
| 40 CFR 262.11 | The generator must test and determine whether the soil is hazardous before it moves |
| Fla. Statute 316.520 | Hauled soil must be tarped so nothing spills or blows onto public roads |
| F.A.C. 62-777 | Sets the Soil Cleanup Target Levels that define clean soil in Florida |
| F.A.C. 62-780.525 | Governs source removal, stockpile limits, and confirmation sampling |
| F.A.C. 62-713 | Permits the facilities that thermally treat and recycle petroleum soil |
| RCRA recordkeeping | Disposal records kept a minimum of three years, longer if disputed |
National disposal companies rarely mention any of this. In Florida, these are the rules that decide whether a project closes clean or reopens as a liability.
What Contaminated Soil Removal Costs
Cost is driven by four things: the contaminant, the volume, the haul distance to a permitted facility, and whether the soil tests hazardous. Hazardous soil can cost several times what non-hazardous soil costs to dispose of, which is exactly why correct testing and isolation save money. Industry-typical ranges look like this.
| Scope | Typical range, per ton |
| Disposal fee only, non-hazardous | $40 to $200 |
| Full service: excavate, haul, and dispose | $140 to $460 |
| Hazardous soil disposal | Several hundred and up |
Industry-typical ranges. Actual cost depends on the contaminant, volume, and facility. Site Serve quotes every job on its specifics.
The cheapest line item on a contaminated soil job is almost always the testing and isolation that keep clean dirt from ever becoming dirty dirt.
Why Tampa Bay Builders Call Site Serve
Dirty dirt never shows up in the finished photo. It is under the marina, under the church campus, under the pad the building stands on. Site Serve has run this process on demolition sites, former gas stations, and commercial pads across Tampa, St. Petersburg, Clearwater, Brandon, and Riverview, for builders who do not tolerate a process failure, including Balfour Beatty, BTI Partners, and CSI Construction. It is the same crew that handles the earthwork and site preparation once the ground is clean. The four steps are not paperwork for its own sake. They are the difference between a site that holds and a problem that comes back. Getting dirty dirt wrong costs more than getting it right.
The Team Tampa Bay Trusts With the Dirt Nobody Sees
Anyone can haul a load to a landfill. Handling contaminated soil the right way is a different thing: read it at the bucket, isolate it, dig it without spreading it, haul it to a facility that will legally take it, and document every ton so the liability ends instead of following the owner around. Site Serve does that work across Tampa, St. Petersburg, Clearwater, Wesley Chapel, Brandon, and Riverview, the same way every time.
If you have dirty dirt on a Tampa Bay site, or you are not sure whether you do, talk to Site Serve. 2209 N. 40th St. Suite 6, Tampa, FL 33605. (813) 922-2393.