Amending Chapter 17, article 2, relating to pretreatment requirements for the use of public sewers

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or excessive loads that may be harmful to the treatment works. (5) Require payment of a surcharge on any excessive flows or loadings discharged to the treatment works to cover the additional costs of having capacity for and treating such wastes. If the Board permits the pretreatment or equalization of waste flows, the design and installation of the plant and equipment shall be subject to the review and approval of the Board and subject to the requirements of all applicable codes, ordinances and laws. (d) Interceptors shall be provided by the discharger as necessary for the removal of grease, flammable wastes, sand, or other harmful substances. All interceptors shall be of a type and capacity approved by the Board or its designee, and shall be readily accessible for cleaning and inspection. The owner and/or operator of interceptor equipment shall be required to maintain certified records as to time and date of cleaning and inspection. (e) When a discharger is required to provide preliminary treatment, including interceptors or flow equalization facilities, such equipment shall be maintained by the discharger in satisfactory operating condition as determined by the Board of Public Works or its designee. (f) When required by the Director, the owner of any property serviced by a building sewer carrying industrial wastes shall install a suitable control manhole, together with such necessary meters and other appurtenances in the building sewer, to facilitate observation, sampling and measurement of the wastes. Such manhole, when required, shall be accessibly and safely located, and shall be constructed in accordance with plans approved by the Director. The manhole shall be installed by the owner at his expense, and shall be maintained by him so as to be safe and accessible at all times. Agents of the City, the State Water Pollution Control Agencies and the USEPA shall be permitted to enter all properties for the purpose of inspection, observation, measurement, sampling and testing. (g) All measurements, tests and analyses of the characteristics of water and wastes to which reference is made in this ordinance shall be conducted using the methods and procedures in 40 CFR Part 136, and shall be determined at the control manhole provided, or upon suitable samples taken at said control manhole, except for the application for NPDES permits and report thereof such shall be conducted in accordance with rules and regulations adopted by the USEPA, 40 CFR Part 136 and any subsequent revisions subject to approval by the City. In the event that no special manhole has been required, the control manhole shall be considered to be the nearest downstream manhole in the public sewer to the point at which the building sewer is connected. Sampling shall be carried out by customarily accepted methods to reflect the effect of constituents upon the sewage works and to determine the existence of hazards to life, limb and property. (The particular analysis involved will determine whether atwenty-four hour composite of all outfalls of a premises is appropriate or whether a grab sample or samples should be taken. Normally, but not always, BOD and S.S. analyses are obtained from twenty-four-hour 5