When you have a pit full of sludge, a tank that needs cleaning, or 3,000 gallons of contaminated water sitting in a secondary containment area, you need a vacuum truck. It is the workhorse of the environmental services industry and the most commonly dispatched piece of equipment in the field.
A vacuum truck is a heavy-duty truck equipped with a large tank (typically 2,000 to 5,000 gallons) and a high-powered vacuum pump. It uses suction to remove liquids, slurries, sludge, and wet solids from tanks, pits, sumps, trenches, and containment areas. The material gets stored in the truck's tank and transported to a disposal or treatment facility.
There are two main types. A straight vacuum truck uses suction only and handles pumpable liquids and light slurries. A combination (combo) vacuum truck adds a high-pressure water jetting system that can break up hardened material, flush lines, and clean surfaces before vacuuming. Combo trucks cost more per hour but save time on jobs that require both cleaning and removal.
Tank cleaning is the most frequent job. Underground storage tanks, above-ground tanks, day tanks, process tanks, and wash water tanks all accumulate sludge and sediment that needs periodic removal. The vacuum truck pumps out the contents, and in many cases the tank interior gets pressure washed before being put back in service.
Pit and sump pumping is the second most common use. Oil/water separator pits, elevator pits, trench drains, catch basins, and containment sumps all collect liquid waste that can't go down the sanitary sewer. Vacuum trucks pump these out on a scheduled basis or as needed after storms or spills.
Spill recovery uses vacuum trucks to remove free product and contaminated water from the ground surface, containment areas, or excavations. During emergency response, vacuum trucks are often the first piece of heavy equipment on scene. Industrial process support uses vacuum trucks for line flushing, vessel entry preparation, and removing process byproducts that can't be pumped through standard piping.
Vacuum truck services are typically billed hourly. Rates vary by region and truck type, but expect $175-350 per hour for a straight vacuum truck and $250-450 per hour for a combo unit. Most contractors have a 2-hour or 4-hour minimum. Portal-to-portal billing means the clock starts when the truck leaves the yard and stops when it returns, so your location relative to the contractor's base matters.
Disposal costs are separate and billed per gallon or per load. Non-hazardous liquid waste disposal runs $0.10-0.50 per gallon depending on the waste type and the receiving facility. Hazardous waste disposal is significantly more expensive, often $1-5 per gallon or more. Always get the disposal cost quoted upfront. A $1,200 vacuum truck job can easily turn into a $5,000 invoice when disposal is added.
Some contractors offer flat-rate pricing for recurring services like quarterly OWS cleanings or monthly sump pump-outs. If you have predictable, recurring needs, a flat rate contract usually saves 15-25% over per-call billing.
What size truck are you sending? A 2,000-gallon truck on a job that generates 4,000 gallons means a second trip to the disposal facility, which means double the transport time billed to you. Ask about truck capacity and get an estimate of total volume before the job starts.
Where is the waste going? The contractor should name a specific disposal facility and confirm it accepts your waste type. If they can't tell you where the waste is going, find a different contractor.
Is the billing portal-to-portal or on-site only? This makes a big difference if the contractor's yard is 45 minutes from your facility. Some will quote on-site time only, while others start the clock at their shop.
Do you have the right permits and insurance? The contractor needs a current waste transporter license for your state, commercial auto insurance, general liability, pollution liability, and workers' comp. Ask for certificates before they roll onto your property.
Read our detailed guide: Vacuum Truck Services: What You're Actually Paying For. It breaks down the billing structure, common overcharges to watch for, and how to get competitive pricing.
If you need a vacuum truck for OWS cleaning specifically, see our OWS Maintenance service page for details on that process.
