§ 1147.08. User classifications.
User charge classifications. The following user charge classes are hereby established:
(a)
Standard Strength User. The standard strength user class shall include all users (including business and industry) whose wastewater load characteristics are less than two hundred fifty (250) mg/L of BOD, less than three hundred (300) mg/L of suspended solids and less than forty (40) mg/L of TKN. All standard strength users shall be charged for effluent at one hundred fifty (150) milligrams per liter of BOD, two hundred (200) milligrams per liter of suspended solids and twenty-five (25) milligrams per liter of TKN.
(Ord. 2616-87.)
(b)
Extra Strength User. The extra strength user class shall include all users whose average wastewater discharge concentration is equal to or greater than two hundred fifty (250) milligrams per liter (mg/L) BOD, three hundred (300) milligrams per liter of suspended solids or forty (40) mg/L of TKN. All users classified as extra strength users shall be charged at established effluent levels. A surcharge shall be levied on all effluent in excess of two hundred fifty (250) mg/L BOD, three hundred (300) mg/L suspended solids or forty (40) mg/L TKN unless billing costs as determined by the director of public utilities exceed the total extra strength surcharges to be recovered.
(c)
Industrial User. The director of public utilities shall assign industrial users, as defined in C.C. 1147.01, to the following industrial classes based on the degree of effort required by the surveillance section of the division of sewerage and drainage to monitor and control their discharges. Industrial users may be assigned to more than one class and class assignments may be revised as monitoring activities change. The director may establish additional industrial user classes if it is determined that an industry or industries do not fit the established class or if special situations arise. The industrial user classes are as follows:
Major Group A. Includes industries requiring monitoring due to actual or potential extra strength discharges.
Subgroup A1. Plant activities reviewed about once per year by phone or visit.
Subgroup A2. Not sampled but charged extra strength as part of a charge class.
Subgroup A3. Marginal for extra strength, sampled at intervals to determine necessity for extra strength charges.
Subgroup A4. Sampled once per sampling sequence.
Subgroup A5. Sampled twice per sampling sequence.
Subgroup A6. Sampled three times per sampling sequence.
Subgroup A7. Requires temporary extra sampling due to changes in operation. Above normal sampling for subgroup A4, A5 and A6.
Subgroup A8. Company has provided satisfactory sampling systems to allow evaluation through split samples.
a.
Several split samples are obtained per month.
b.
Samples are split and analyzed on a daily basis.
Major Group B. Includes industries requiring action due to known or possible sewer use problems.
Subgroup B1. Activities reviewed about once a year.
Subgroup B2. Sewer use parameter checked as part of extra strength sampling.
Subgroup B3. Samples of discharge collected and analyzed at intervals.
Subgroup B4. Company has been identified as requiring sewer use control by USEPA categorized pretreatment standards:
a.
After Columbus has been designated as "control authority."
b.
Before Columbus is designated as "control authority."
Subgroup B5. Company has been identified as having an unacceptable discharge, and a program to resolve the problem is required and:
a.
Major city activity is required;
b.
Significant city activity is required;
c.
Minimal city activity is required.
Subgroup B6. Company requires control, but the problem has been resolved and intermittent monitoring is now required.
(Ord. 478-92.)