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It e e - e . ORDINANCE NO. / d::t-/ Page 11 (b) When discharges of any waste into the City of La Porte system are approved by the Approving Authority, the City or its authorized representative shall enter into an agreement or arrangement providing (1) Terms of acceptance by the City; (2) Payment by the person making the discharge, in accordance with the User Charge System as estab- lished in Subpart (e) of this Section; (3) Sewer connection procedures and requirements shall be in accordance with the Southern Standard Plumb- ing Code, as amended; (4) A sewer application approved with connection fee paid; and (5) Construction of sewer connections shall be approved by City inspectors prior to sewer use. (c) Each User of the wastewater treatment system will be notified, at least annually, in conjunction with a regu- lar sewer bill, of the rate and that portion of user charges which are attributable to the Operation and Maintenance of the wastewater treatment system. (d) The City will apply excess revenues collected from a class of users to the cost of operation and maintenance attributable to that class for the next year and adjust the rates accordingly. (e) User charges shall be in conformance with Chapter 26, Article II, Section 26-15, Sewer Service Charges, of the City of La Porte Code of Ordinances. SECTION 17. INDUSTRIAL COST RECOVERY SURCHARGE. Persons or owners discharging industrial wastes which,exhibit none of the characteristics of wastes prohibited in Section 2, other than excessive BOD, or suspended solids, having a concentra- tion during a twenty-four (24) hour period average of suspended solids of BOD content in excess of "normal domestic sewage" shall be required to pretreat the industrial wastes to meet the require- ments of "normal domestic sewage"; however, such wastes may be accepted for treatment if all the following requirements are met: (a) The wastes will not cause damage to the collection system. (b) The wastes will not impair the treatment process. (c) The discharger of the wastes enters into a contractual agreement with the City of La Porte providing for a sur- charge over and above the existing sewer rates. The .basis for surcharge on industrial wastes is to be com- puted on the following basis: ISS = v' [0.085 (BOD-250) + 0.056 (SS-300)] ISS - Industrial waste surcharge in dollars V - Volume discharged in thousand gallons BOD - Five day at 20 C BOD of the industrial waste (mg/1) SS - Suspended solids of the industrial waste (mg/l)