Start with the site postcode, tank type and approximate contents. A photograph of the route to the tank can matter as much as the tank itself. Include gates, doors, steps and the nearest suitable vehicle position, without opening covers or disturbing equipment.
Explain what the installation supplies and when it can stop. A factory process, fleet dispenser and standby generator each need a different discussion about availability. Where fuel remains, say roughly how much and whether there are existing sample results or signs of contamination.
A useful quotation separates fuel handling, vessel preparation, removal or treatment, waste and reinstatement. Ask for the completion records that fit the job. Do not assume that a cleared tank proves clean ground or that a cleaned vessel has passed a structural assessment.
Read The Planning FAQs