Pursuant to the Ordinance adopting this subtitle, it shall be the duty of every hauler, self hauler, solid waste generator, and solid waste acceptance facility subject to the provisions of this subtitle to keep and preserve, for a period of 4 years, such suitable records as may be necessary to determine the amount of such surcharges for which that person may be liable. Among the records necessary are:schedules and locations of disposal and collection; amount charged to each customer; and any other records determined by the Director of Finance to be necessary to the proper oversight of the surcharges. Every hauler and self-hauling solid waste generator shall keep records and receipts relating to the final destination of recyclable materials that were transferred. The Director or the Director’s agent shall have the right to inspect these records during regular business hours. If any person fails to keep records from which the surcharge imposed by this subtitle may be accurately computed, the Director of Finance may make use of a factor developed by surveying other operators of a similar type, or otherwise, compute the amount of surcharge due, and this computation shall be prima fade correct. Recyclable materials which are taken to a non-approved facility are not exempt from the recycling incentive surcharge. City Code, 1976/83, art. 23, §27(b) Ord. 91-757