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6 <br />.s <br />M <br />r 9• Chromium - shall not exceed 0.50 mg/1 hexavalent <br />or 1.0 mg/1 total chromium. <br />10. Phenolic type compounds calculated or reported as <br />phenol --shall not exceed 0.001 mg/1. <br />11. Lead - shall not exceed 0.05 mg/1. <br />12. Iron - shall not exceed 0.30 mg/1. <br />13. Arsenic = shall not exceed 0.05 mg/1. <br />14. Chlorides - shall not exceed 600 mg/1. <br />15• Sand - shall not exceed 0.01 mg/1 at any time. <br />B. Prohibited Discharges <br />The following discharges into any collection system <br />shall be prohibited: <br />I. Any industrial waster that exceeds the requirements <br />of -Paragraph A or as defined by the Environmental <br />Protection Agency, without written approval of the <br />City's Director of Utilities. <br />g <br />2. Storm water, yard drains, roof drains or catch basins. <br />3. The discharge of coolant water of air conditioning <br />unit. <br />i t <br />4. Machinery and motor vehicle lubricants. <br />n� <br />5. Gasoiine, benzene, naptha, mineral spirits or other <br />flammable or explosive liquid, solid or gas. <br />1 <br />6. Any, ashes, sand, mud, metal, glass, rags or any solid <br />or viscous substance capable of causing obstruction <br />to the flow in sewers or interference with the proper <br />f <br />operation.of the treatment plant. <br />.. k <br />- -11- <br />NOV 7197 Box 218 <br />