Section 8.08.050 Industrial wastes.

2. Approval Required. Review and acceptance by the superintendent shall be obtained at least thirty (30) days prior to the discharge into the city sewerage system of any wastes having either:

3. Submission of Basic Data. Any person who is discharging industrial wastes into 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 data relating to the quantity and characteristics of the wastes discharged to the sewers. The superintendent shall establish when the report is to be filed.

Similarly, any person planning or desiring to make a new connection to a city sewer for the purpose of discharging industrial wastes as defined herein shall prepare and file prior to actual discharge a report with the city that shall include actual or predicted data relating to the quantity and characteristics of the waste to be discharged.

4. 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 subsection (A)(2) of this section, a request for extension of time may be presented for consideration by the superintendent.

1. Except as provided in subdivision 2 of this subsection, each person discharging industrial wastes into a public sanitary sewer shall 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 superintendent. 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.

2. In lieu of directing the construction of measurement sampling and sample storage facilities, the superintendent may require that each person discharging industrial wastes into a public sanitary sewer procure and test at the person's expense and in a manner approved by the superintendent, sufficient composite samples on which to base and compute the person's industrial waste sewer service charge. In the event 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 superintendent prior to allowing any deduction of such flow from the total water used on the premises in computing the industrial waste sewer service charge.

3. In addition to the foregoing requirements of this section, any industrial contributor shall, prior to connection to the city sewage system, make satisfactory arrangements with the recorder to pay to the city that portion of the capital cost of the city sewage system which is allocable to the treatment of such industrial waste. Such capital cost recovery payments shall conform to the current United States Environmental Protection Agency industrial cost recovery requirements.

4. The city may determine, by composite waste samples during a year, if a waste discharged to the sanitary sewers, of either BOD or suspended solids, exceeds two hundred (200) pounds per day for three consecutive days, then the requirements set forth below for installation of measurement and sampling equipment shall apply.

1. If so directed by the city, all devices, access facilities, and related equipment shall be installed by the person discharging the waste, at the person's expense, and shall be maintained by the person so as to be in safe condition, in proper operating condition at all times, and readily accessible to city employees during the operating day. The flow measurement device may be a Parshall flume, weir, venturi nozzle, magnetic flowmeter, or any other type of device acceptable to the superintendent which provides accurate and continuous flow indication. Pump timers or other indirect measurement devices shall not be acceptable.

2. The flowmeter shall be suitable for indicating and totalizing the flow with an error not exceeding plus or minus five percent. This quantity should be selected so as to insure a minimum of fifty (50) samples per operating day. Other control variations shall be acceptable if it can be demonstrated to the satisfaction of the superintendent that the sampling procedure will result in a waste sample which is proportional to the waste flow. The length of operation of the sampling device shall be dependent on the type of sampling arrangement used, but in no case shall the daily collected sample be less than two quarts in volume.

3. The method of sampling used may be by continuous pumping past a solenoid-operated valve, direct pumping into the sample container, continuous pumping past a sampler dipper calibrated to remove a constant sample, by a proportional sample dipper operating directly in the waste flow, or by any other means approved by the superintendent. All samples must be continuously refrigerated at a temperature of thirty-nine (39) degrees Fahrenheit, plus or minus five degrees.

4. The flow measurement and sampling station shall be located and constructed in a manner acceptable to the city. Complete plans on all phases of the proposed installation, including all equipment proposed for use, shall be submitted to the city for approval prior to construction.

5. The person discharging the waste shall keep flow records as required by the city and shall provide qualified personnel to properly maintain and operate the facilities.

D. Analyses. Laboratory procedures used in the examination of industrial wastes shall be those set forth in Standard Methods. However, alternate methods for certain analyses of industrial wastes may be used if approved by the superintendent. The waste samples shall be analyzed by the city. (Ord. 188 § 5, 1996)