When these gas station fuel tanks were emptied, buoyant forces pushed the tanks through soil and asphalt to bring them to the surface. The same situation can occur when a septic tank is not properly installed.
Three years ago, during an installer class conducted in cooperation with the California Onsite Wastewater Association, we discussed installation procedures for sewage tanks. We highlighted the importance of avoiding or recognizing when a tank may float to the surface. The class...
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