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Pg. 10 <br />discharge of such used water to the sanitary sewer system, such person <br />shall, at his own expense, either (1) install a meter of design approved <br />by the director of Public Works or his designee on the water supply line <br />• to his industrial process operations or (2) install a meter of design <br />approved by the director of Public Works or his designee on the waste line <br />from such industrial process operations. The volume of water or waste <br />flow, respectively, as measured through such meter shall be considered to <br />be the volume of industrial waste discharged into the sanitary sewer system. <br />(c) If any person now discharging or proposing to discharge <br />industrial waste into the sanitary sewer system does not secure his entire <br />water source from the City such person shall, at his own expense, install <br />a meter of design approved by the director or his designee on the waste <br />line from his industrial process operations. The volume of waste flow, as <br />measured through such meter shall be considered to be the volume of waste <br />discharged to the sanitary sewer system. <br />SECTION 24-22. Access for measurements. <br />(a) Any person now discharging or proposing to discharge any <br />industrial waste into the sanitary sewer system shall construct, at his <br />own expense, a control manhole on the waste line from his industrial and <br />process operations for the purpose of facilitating observations, measure- <br />ments, and sampling of the industrial waste discharge from such person's <br />establishment. The control manhole shall be constructed in a suitable <br />•and satisfactory location downstream from any pretreatment facilities, <br />holding tanks, or other approved works, and ahead of the point of <br />discharge of such waste into the sanitary sewer system. The design of the <br />control manhole shall be in accordance with the requirements established <br />by the director of Public Works or his designee. The control manhole <br />shall be maintained by such person so as to be safe, accessible, and in <br />proper operating condition at all times. <br />(b) Such requirement for a control manhole shall be waived by the <br />director provided that: (1) the total daily waste flow from the <br />establishment of such person does not exceed 50,000 gallons; and (2) the <br />maximum rate of discharge from said establishment does not exceed 100 <br />gallons per minute; and (3) access, means, and facilities are provided <br />within such establishment for the purpose of observing, measuring, and <br />sampling the waste flow from such establishment; and (4) the discharge of <br />all waste from such establishment is, in all other respects, in full <br />compliance with this article. <br />SECTION 24-23. Determination of character and concentration of waste. <br />(a) The Department of Public Works, or the Rivanna Water and Sewer <br />• <br />