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e e ORDINANCE NO. /~I Page 12 . The volume of wastes may be determined by the same methods used to calculate the regular sewer service charge. For establishments discharging less than 20,000 gallons/day, the BOD and suspended solids values may be determined from standard values for various industries established by the Approving Authority. In cases where the discharge from any establishment exceeds 20,000 gallons/day, or in the event that the discharger desires to determine ac- curate values of BOD and suspended solids, the dis- charger shall install at his expense a sampling point at a location near the outlet of each building drain or connection with any sanitary sewer of the City. BOD and suspended solid values determihed from samples collected from any establishment shall be determined by the Approving Authority or a Regis- tered Professional Engineer employed by the dis- charger. Such report shall contain a statement that the samples collected and values determined are based on a 24-hour composite representative of the establish- ment's flow. Each sampling point shall be installed and shall be so maintained by the discharger so that any authorized representative of the City may readily and safely obtain samples of the flow at all times. Plans and location of such sampling points shall be approved by the Approving Authority prior to construc- tion. Construction of such sampling points for exist- ing discharges shall be completed by January 1, 1981, if use of data to be considered for rate establishment by June 1, 1981. If a discharger installs a sampling point after this date, adjustment of the rate to actual samples will be made within a 90 day period from the date of installation. . All flow rates and BOD and suspended solid values used in determination of the Industrial Sewer Service Charge shall be re-eva1uated on an annual basis. However, if there is a major change in the operation to cause changes in value, the values may be increased or decreased on a study of changes or actual measurements. e The basis for determining the surcharge shall be reviewed biannually and shall be adjusted to reflect any increase or decrease in wastewater treatment costs based on the previous years experience. (d) Billing Practice - Industrial waste surcharges provided for in this ordinance shall be included as a separate item on the regular bill for water and sewer charges and shall be paid monthly in accordance with the existing practices. Surcharges shall be paid at the same time . .that the sewer charges of the person become due and pay- ment for sewer services shall not be accepted without payment also of sewer service surcharges. SECTION 18. SAVINGS CLAUSE. A person discharging wastes into public sewers prior to the effective date of this ordinance may continue without penalty so long as he (1) Does not increase the quantity or decrease the quality of discharge without permission of the Approving Authority; e (2) Has discharged the waste at least six (6) months prior to the effective date of this ordinance; and (3) Applies for and is granted a permit no later than ninety (90) days after the effective date of this ordi- nance.