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<br />( 24 ) <br /> <br />(c) <br /> <br />Any wastewater with objectionable color or odor not <br />removed in the treatment process, such as, but not <br />limited to, dye wastes, vegetable tanning solutions, <br />and whole blood. <br /> <br />The maximum concentration of waste constituents other than <br />those named in this section acceptable for discharge into <br />the sanitary sewer system will be those levels as specified <br />by the Texas Water Commission or other appropriate <br />governmental unit or agency. <br /> <br />SEC. 30-62. Drainage Water Prohibited. No person may discharge <br />or cause, suffer, allow, or permit to be discharged into a <br />sanitary sewer, any drainage water, as defined herein, except as <br />listed below or approved by the Director. <br /> <br />( 1) <br /> <br />( 2 ) <br /> <br />( 3) <br /> <br />(4 ) <br /> <br />Filter backwash water from swimming pool filters may <br />discharge to the sanitary sewer if the flow rate does not <br />exceed 20 gallons per minute and the plumbing is so designed <br />that the pool itself may not drain directly into the <br />sanitary sewer. Filter backwash in excess of 20 gpm may be <br />permitted if conducted during off-peak hours determined by <br />the Director. For diatomaceous earth type filters, the <br />filter backwash water must pass through an approved catch <br />filter before discharging to the sanitary sewer. The catch <br />filter shall be of the same physical dimensions as the <br />filter tank and be equipped with a suitable filter cloth <br />that will retain all diatomaceous earth. <br /> <br />Single-Pass Cooling water. The City discourages the <br />discharge of single-pass cooling water into the sanitary <br />sewer but will permit it to be otherwise discharged if it <br />has not become contaminated in the cooling process; provided <br />discharge plan is approved by the Director. Single-pass <br />cooling water used in laboratories that use regular table or <br />counter top facilities and/or bench scale facilities is <br />exempted from the volume and percentage requirements in all <br />sections of the following three paragraphs. Laboratories <br />carrying out pilot plant operations or that have <br />manufacturing scale facilities are not exempted. <br /> <br />Single-pass cooling water shall not be discharged to the <br />sanitary sewer in a greater amount than five percent (5%) of <br />the average monthly water usage or one (1) gallon per <br />minute, whichever is greater. <br /> <br />The customer shall supply necessary data and assist in <br />determining the amount of single-pass cooling water that is <br />being discharged into sanitary sewer. If the customer does <br />not agree with the results of the City's survey, he may <br />install measuring devices to determine the consumption of <br />this single-pass cooling water; <br /> <br />Only the Director may grant special approval for the single- <br />pass cooling water to exceed these limits if the Director <br />finds: <br /> <br />(i) <br /> <br />The wastewater treatment system of the City <br />not be adversely affected thereby; and, <br /> <br />would <br /> <br />(ii) <br /> <br />The applicant will suffer substantial economic <br />hardship unless the percent limit is waived. <br /> <br />Blow down, bleed water, or overflow water from boilers or <br />cooling towers may not be discharged to the sanitary sewer <br />at a rate greater than five (5) gallons per minute or two <br />percent (2%) of the recycle water rate as designated by the <br />equipment manufacturer, whichever is greater. <br /> <br />SEC. 30-63. <br /> <br />( 1) <br /> <br />Pretreatment and Disposal of Prohibited Wastes. <br /> <br />Pretreatment of Prohibited Waste. Any person generating <br />waste prohibited from discharge into a sanitary sewer by the <br />foregoing shall pretreat or otherwise dispose of the <br /> <br />-8- <br />