83-012 ORD ARTICLE III SEWER USE ORDINANCE

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maintenance surcharge. These surcharges shall be calculated on a monthly basis using metered wastewater contribution as a volume factor, if provided by the user, or 100$ of water usage. The total fat, oil, and grease allowed by this ordinance is 100 mg/1, whether free or emulsified. When this parameter is determined on a composite sample, any amount over the allowable limit shall be added in mg/1 to the BOD5 and SS values used for purposes of surcharge calculation. 1) Unless otherwise specified, samples shall be twenty-four (24) hour composites. When a flow-recording device is provided the samples may be flow-weighted; otherwise, a simple composite sample shall be used. 2) The surcharges shall be based on all samples taken in the previous month or the most recent sample available. In no case shall the sampling basis be less than two (2) twenty- four (24) hour composite samples per year if a surcharge is levied. 3) The City may elect to set a minimum surcharge. Regular sampling may be suspended on those users, considered by the Superintendent to be consistently below the minimum surcharge. When sampling has been suspended, periodic grab samples may be used to determine if regular sampling should be reinstated. The user may elect to have his discharge resampled by the City for purposes of surcharge recalculation. The City shall retake one sample for each sample taken in the normal sampling program for a charge equal to the City's expense. Sampling at the request of the user in greater frequency than stated above shall be elective on the part of the Superintendent; charges for such sampling shall be at a flat rate of three times the City's cost. The user may request, no later than the onset of sampling, a split or duplicate of any sample taken by the City for surcharge calculation or compliance with any portion of this ordinance. 25