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l9/30 <br />6.4 4 0 ~ l } of this code at least one to four times annually to <br />ascertain whether the provisions of sections 6.400 to 6.470 <br />of this code are being comp lied with. The owner, operator <br />or agent in charge of premises where wastewater is created or <br />discharged shall allow authorised representatives of the city, <br />state and EPA, upon presentation of their credentials, access <br />at all reasonable times to all parts of the premises where <br />wastewater-related facilities are located or in which records <br />required by sections 6.400 to 6.470. of this chapter are kept <br />for the purpose of the performance of any of their duties , in- <br />eluding but not limited to, inspection, observation, sampling, <br />and/or records copying and examination. The city, state and <br />EPA shall have the right to set up on the nonresidential user's <br />property such devices as may be necessary or proper to conduct <br />sampling, observation, inspection, compliance monitoring and/or <br />metering operations. The nonresidential user shall make <br />arrangements with its employees so that upon presentation of <br />their credentials, representatives from the city, state ar EPA <br />will be permitted to enter, without delay, fvr the purpose of <br />performing their responsibilities. <br />410} Pretreatment facilities. As a condition for the <br />granting of a wastewater discharge permit, the permit holder <br />may be required to install pretreatment facilities or make <br />plant or process modif icat~ions as deemed necessary by the city <br />manager to meet the requirements of sections 6.400 to 6.470 of <br />this code. whenever such facilities or modifications are re- <br />quired, they shall be constructed, installed, operated and main- <br />tained at the expense of the permit holder and such modifica- <br />tions shall meet the discharge levels required by the city man- <br />ager to enable the city to comply with all state and federal <br />regulations of the treatment works discharge levels or to pro- <br />tect the city sewerage system or treatment process. The permit <br />holder shall maintain records indicating routine maintenance <br />check dates, cleaning and waste removal dates and means of dis- <br />posal of accumulated wastes. Such records shall be retained <br />for a minimum of three 43} years and shall be subject to re- <br />view in accordance with subsection 49} of this section. Appro- <br />val of proposed facilities or modifications by the city manager <br />will not in any way guarantee that these facilities or modifi- <br />cations will function in the required manner or attain the <br />required results, nor shall it relieve a permit holder of the <br />responsibility of enlarging or otherwise modifying or replac- <br />ing such facilities to accomplish the intended purpose and to <br />meet the applicable standards, limitations and conditions of <br />a wastewater discharge permit. <br />411.7 Confidential information , Information and data <br />obtained by the city from reports, questionnaires, permit <br />applications, permits and monitoring programs shall be avail- <br />able to the public and other governmental agencies without <br />restriction unless the permit holder requests in writing that <br />it be confidential and demonstrates to the satisfaction of the <br />city manager that such records are exempt from disclosure <br />under 4RS 192.500 41} 4b} , 4e} or 42} 4.g} . Notwithstanding any- <br />thing herein to the contrary, all such data shall be available <br />at least to the extent necessary so that the city manager can <br />ordinance ~- 11 <br />