Laserfiche WebLink
6 <br /> <br />(4) Require the same or similar monitoring; and <br />(5) In the opinion of the Director, are more appropriately controlled under a <br />general control mechanism than under individual control mechanisms. <br />AD. Grab Sample. A sample which is taken from a wastestream on a one-time basis <br />without regard to the flow in the wastestream and without consideration of <br />time. <br />AE. Gravity Grease Interceptor. a plumbing appurtenance identified by volume and <br />intended to be installed in a sanitary drainage system to intercept, using gravity <br />only, nonpetroleum fats, oils, and greases (FOG) from a wastewater discharge. <br />AF. Hexane Extractable Materials (HEM). Hexane extractable material (HEM, oil and <br />grease): Material that is extracted from a sample using n-hexane and determined <br />by this method (i.e., EPA Method 1664, Revision B: n-Hexane Extractable <br />Material (HEM; Oil and Grease) and Silica Gel Treated n-Hexane Extractable <br />Material (SGT-HEM; Non-polar Material) by Extraction and Gravimetry. This <br />material includes relatively non- volatile hydrocarbons, vegetable oils, animal <br />fats, waxes, soaps, greases, and related matter. <br />AG. High Strength Waste. Any waters or wastewater having a concentration of BOD <br />or Total Suspended Solids in excess of 300 mg/L, or having a concentration of <br />Total Fats, Oil and Grease in excess of 50 mg/L. <br />AH. Hydromechanical Grease Removal Device (Grease Trap). a plumbing <br />appurtenance or appliance installed in a sanitary drainage system to intercept <br />nonpetroleum fats, oils, and greases (FOG) from a wastewater discharge; rated <br />by flow. The design incorporates air entrainment, hydromechanical separation, <br />interior baffling, and/or barriers in combination or separately, and one or more <br />of the following: external flow control, with air intake (vent), directly connected <br />(1) external flow control, without air intake (vent), directly connected <br />(2) without external flow control, directly connected <br />(3) without external flow control, indirectly connected <br />AI. Indirect Discharge or Discharge. The introduction of pollutants into the POTW <br />from any non-domestic source regulated under Section 307(b), (c), or (d) of the <br />Act. The discharge into the POTW is normally by means of pipes, conduits, <br />pumping stations, force mains, constructed drainage ditches, surface water <br />intercepting ditches, and all constructed devices and appliances appurtenant <br />thereto. <br />AJ. Industrial User. An Industrial User is any discharger of non-domestic waste.