Windmill Oil Tank Service - Services

By: Windmill Oil Tank  09-12-2011
Keywords: Excavation, tank, Foam

Our expert crew offers the most professional service in the area. We finish all work in a timely and meticulous manner. Below are descriptions of our main services.


Our most popular above-ground tanks include the widely-used Granby 275-gallon steel tank, the revolutionary ZCL Composite 240- and 300-gallon fiberglass tanks, and the Roth double-wall tanks in various sizes. We offer both vertical and horizontal models and custom fabrication. Other sizes and styles can be ordered upon request. Above-ground tanks are placed on a level concrete slab and basement tanks are placed directly on the basement floor. Fill and vent lines are American-made steel, not imported. ZCL Composite fiberglass tanks come with a 30-year warranty and Granby steel tanks come with a 3-year warranty, and all new tanks are air tested prior to installation.

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For buried installation, we offer the state of the art Cardinal 285-, 550-, and 1,000-gallon fiberglass tanks. Double-wall is are available from 500-gallon tanks up to 20,000-gallon tanks. Custom sizes and styles can be ordered upon request. Tank beds are excavated with a backhoe. They are typically slighty longer and wider than the actual tank. Before the tank is in place, a layer of pea gravel is placed in the excavation to ensure proper drainage and protect against tank damage. Fill and vent lines are once again American made steel. Petrometers, which tell you how much oil is in your tank, can also be installed at your request. Once the new tank is correctly placed and assembled, the excavation is refilled with screened sand as per the manufacturer's instructions. After all work is complete, the 30-year warranty is filled out and sent ot the manufacturer.


Above-ground or basement tanks which are no longer in use can be pumped clean of any residual oil and picked up by our crew. The whole process takes less than an hour. It's as simple as that.


Windmill has the ability to remove any size tank. The process for removing an abandoned buried tank is similar to that of installing a buried tank. The tank is excavated, leaving some extra room on all sides to make removal easier. The tank is then cut open and pumped out with a vacuum truck. A crew of highly trained tank cleaners then enter the tank and clean the walls and floor to prevent any remaining oil from spilling out. Finally, the tank is removed from its grave and disposed at a licensed facility. The excavation is then filled in with clean fill. If the ground should sink in the future (which is unlikely because our adept crew makes every effort to pack and level the soil at the time of excavation), we will return to add more fill if needed.


Buried tanks that are no longer in use can also be filled with an inert material and left in place. The simplest and most cost-effective type of fill is foam. No damage is done to your lawn because the tank can be filled directly through the fill pipe. At Windmill, we use only Tripolymer 105 fireguard foam for our foam abandonments. First, the tank is pumped clean and the waste oil is taken to a licensed disposal facility. Next, Speedy Dry is placed in the tank to absorb the sludge clinging to the walls and floor. Finally, foam is pumped into the tank and the fill and vent pipes are cut below grade.

In Nassau and SUffolk counties, most tanks less than 1,100 gallons can be abandoned with foam (depending on the water table). In New York City, any size tank can be abandoned with foam.


Sand abandonments are necessary in areas where the water table is high. The process is much like that of a buried removal. The top of the tank is excavated and cut open. The tank is then pumped clean of residual oil with a vacuum truck and Speedy Dry is added. Finally, the tank is filled with sand and the excavation is filled in.


Slurry, or abandonment using cement, is necessary for tanks over 1,100 gallons that must remain in place. The process is the same as that of a sand abandonment, except that cement is pumped into the tank instead of sand. Slurry is usually not necessary for residential tanks.


It is recommended that buyers test the existing oil tank or the surrounding soil for leakage. A spill cleanup is a costly and strenuous process, one which can be easily avoided by proper tank maintenance and observation. If you are suspicious that your tank is leaking, please do not hesitate to set up a test. We offer pressure tests, hand soil borings, and Geo Probe service.


Over the years, Windmill has climbed the ladder of spill remediation. We are now one of the most prominent environmental associations on Long Island. If you think you might have an oil spill, please do not hesitate to call. Advice is free, and our professional staff will be happy to help you in any way they can.

Established 1976 - Full Service Tank and Remediation Company

Installation and Testing • Free Advice Given Gladly!

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Keywords: Excavation, Foam, tank