1. Testing of groundwater and soil surrounding and under the diesel tank for soil contamination
2. If test shows contamination, must have soil removed and it must be hauled away to a certified facility. If HAZMAT, then to a HAZMAT facility. If not, then to a NON-HAZMAT facility.

1. Vacuum out and clean tank and remove sludge, rust and grease as per FDEP and DERM requirements
2. As per FDEP requirements, if sludge rust or grease exceeds 55 gallons, must test it and haul away to certified facility, HAZMAT or not depending upon what the test results were.

1. Fuel must be removed from the diesel tank before abandoning or removing the tank. If contaminated, then must be hauled away to a HAZMAT facility or can be cleaned and reused.

All test reports must be sent to the FDEP authorized County agency like DERM in Miami (Department of Environmental Response Management, Miami ), for example. If contamination was found during the testing, discharge reports must be sent to FDEP.

One important note is the following:
The local authorized County agency will make the decision on whether or not an underground diesel tank can be abandoned or has to be removed. If you can abandon, concrete will have to be poured into and around the existing diesel tank to seal it forever.