Demonstrations -
Underground Tank Abandonment with Tripolymer®
105-TM
*Note: This demonstration shows the tank being opened for cleaning before abandonment. This procedure varies by location, and is not always necessary. Check your local regulations for more information.
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The subject of this abandonment was located beneath the rear deck of this Connecticut home. This picture shows the deck removed and an access hole dug down to the level of the tank. |
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Looking into the hole with starting cuts made. The fill pipe has been removed as per regulations. |
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A close-up of the tank before it is opened for cleaning. |
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The tank is opened and the lid is set aside. |
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With the lid removed, sludge can clearly be seen inside the tank. |
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Pumping the remaining sludge out of the tank for disposal. |
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A close-up of the draw tube used for sludge removal. |
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This tank has now been cleaned and prepped for foaming. Note how the dirt that has fallen into the tank remains dry, demonstrating the cleanliness of the tank. Only a bit of water remains from the rinsing process. |
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The foam mixing gun is set up and ready to go. |
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A technician takes his stance over the tank, ready to foam. |
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The foam is sprayed to the side of the hole for visual inspection of the foam product before filling the tank. This will fall into the tank and add to the fill - resulting in no wasted product. |
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One technician fills the tank while another keeps an eye on the mixing gun settings. During the foaming process, the settings occasionally may need minor tweaking to ensure optimal foam is created. The foaming on a job like this can be easily accomplished by only one man. |
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A close up view of the foam as it leaves the mixing gun. At the current setting, the foam is being blown under high pressure to reach and prime the far corners of the tank. After a few seconds, the output pressure is cut to allow a 'creamier' fill, which will flow to completely fill the tank. Regardless of output pressure, the same amount of foam is generated. |
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The finished product; the foam has completely filled the tank up to the level of the access hole. Tripolymer does not expand, so the entire process was completed in one step. |
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The lid is placed back over the access hole to protect the foam during final curing. |
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A close-up of the replaced lid. In this situation, the hole was then filled again with dirt. Under certain circumstances, it may be desired to spot weld the lid in place, depending on the weight expected upon the tank before final curing of the foam. |
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