(a) An owner or operator shall maintain for 3 years documents necessary to verify the payment of the gallon, capacity and tank fees. At a minimum, these records shall include:

1. (1) Distributor delivery invoices.
2. (2) Financial records documenting payment of fees.
3. (3) Regulated substance inventory documents.
4. (4) Copies of the statement for a gallon, capacity or tank fee.

(b) A distributor shall maintain for a minimum of 3 years documents necessary to verify the number of gallons of regulated substances delivered into a UST. Records shall be maintained by customer account and shall include at a minimum:

1. (1) Distributor delivery invoices.
2. (2) Financial records, by customer account, documenting payment of the gallon fee.
3. (3) Financial records pertaining to remittance of the gallon fee by distributor.
4. (4) Regulated substance inventory records.
5. (5) Copies of the Fund’s gallon fee statement.

(c) A certified company shall maintain for 3 years documents necessary to verify the company certification and the number of installer certifications held by the employees of the company for the installation, major modification and removal of a UST or a HOT. This documentation shall include, at a minimum:

1. (1) Copies of the DEP company certification and tank installer certificates.
2. (2) Financial records documenting payment of fees to the Fund.

(d) A certified company shall maintain documents necessary to verify the number of installations, modifications and removal activities performed on a UST or a HOT. This documentation shall include, at a minimum:

1. (1) Copies of the tank activity report form originally submitted to the DEP.
2. (2) Financial records documenting payment of fees to the Fund.