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(A) Wastes discharged into the public sewers shall be subject to periodic inspection and a determination of character and concentration. The determinations shall be made as often as deemed necessary by the Secretary.
(B) When automatic flow measurement and sampling facilities are not available, the samples shall be collected by the city in such a manner to be representative of the composition of the wastes. The sampling may be accomplished either manually or by the use of mechanical equipment. Access to the sampling locations shall be granted to the secretary or his or her duly authorized representatives at all times.
(C) All measurements, tests, and analyses of the characteristics of waters and wastes to which reference is made in these rules and regulations shall be determined by the city in accordance with the latest edition of standard methods and shall be determined at a control manhole provided, or taken at said control manhole. 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 the city 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.
(Ord. 46, passed 4-8-1975) Penalty, see § 52.999
INDUSTRIAL WASTES
(B) Approval required. Review and acceptance by the secretary shall be obtained at least 30 days prior to the discharge into the city sewerage system any wastes having either:
(1) A total of 30 pounds or more of suspended solids in any one day; or
(2) A total of 30 pounds or more of BOD in any one day.
(C) Submission of basic data.
(1) Each person who may be discharging industrial wastes to the city sewer system shall, upon request by the city, prepare and file with the city or a local government agency contracting with the city, a report that shall include pertinent date relating to the quantity and characteristics of the wastes discharged to the sewers. The secretary shall establish when the report is to be filed.
(2) Similarly, each person desiring to make a new connection to a city sewer for the purpose of discharging what may be defined as industrial wastes shall prepare and file with the city a report that shall include actual or predicted data relating to the quantity and characteristics of the waste to be discharged.
(D) Extension of time. When it can be demonstrated that circumstances exist which would create an unreasonable burden on the person to comply with the time schedule imposed by division (B) above, a request for extension may be presented for consideration of the city.
(Ord. 46, passed 4-8-1975) Penalty, see § 52.999
(A) Each person discharging industrial wastes into a public sanitary sewer with a daily total in excess of 25 pounds of either BOD or suspended solids may, at his or her option, or shall, when directed by the city, construct and maintain an approved control manhole, together with such flow measurement flow sampling, and sample storage facilities for all waste entering the public sewer as may be required by the secretary. These facilities will be used to obtain flow, BOD, and suspended solids data for use as a basis for an industrial waste sewer service charge.
(B) In lieu of directing the construction of measurement sampling and sample storage facilities, the secretary may require that each person discharging industrial wastes into a public sanitary sewer which has a daily total in excess of 25 pounds of either BOD or suspended solids to procure and test at the person’s expense and in a manner approved by the secretary, sufficient composite samples on which to base and compute the person’s industrial waste sewer service charge. In the event that automatic flow measurement, sampling, and sample storage facilities are not provided, the industrial waste charge shall be computed using the metered water flow to the premises as a basis for waste flow and the laboratory analysis of samples procured as directed by the secretary as a basis for computing BOD and suspended solids content of the wastes. Metered water flow shall include all water delivered to or used on the premises and which is discharged to the city sanitary sewer. In the event that private water supplies are used, they shall be metered at the person’s expense. Cooling waters or water not discharged to a sanitary sewer shall be separately metered at the person’s expense and in a manner approved by the secretary prior to allowing deduction of such flow from the total water used on the premises in computing the industrial waste sewer service charge.
(C) Persons discharging industrial wastes into a sanitary sewer with a daily total of 25 pounds or less of either BOD or suspended solids shall have the option of installing measurement and sampling facilities for the purpose of receiving an industrial waste sewer service charge based on quantity and strength of the waste, or may elect to have their sewer service charge based on the commercial sewer service rate established by the city. The city may determine, by at least three composite waste samples during a year, if a waste discharged to the sanitary sewers, based on either BOD or suspended solids, exceeds 25 pounds per day. If three consecutive measurements by the city indicate that the 25 pound per day rate is being exceeded, then the options for installation of measurement and sampling equipment shall apply.
(Ord. 46, passed 4-8-1975)
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