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Wastes considered to be non-hazardous may be disposed of in the sewer. To determine if a chemical waste is sewerable, use Section 6, Sewer Limits, beginning on the next page, and follow these guidelines:

  1. Determine whether the chemical waste's concentration is below the acceptable concentration listed in Section 6, Sewer Limits.
  2. If the chemical is at or below the sewerable concentration, it may be sewered. If it is either greater than the sewerable concentration or not listed, it should be picked up by EH&S, as described in Section 4.1.
  3. Never sewer chemicals unless the concentration is at or below the amount listed in the table.
  4. When sewering, the chemicals must be in an aqueous solution prior to sewer discharge and should be discharged with running water.
  5. A notice must be posted in the lab near the point of sewer discharge which reads, "In case of a discharge in violation of the sewer limits, please call EH&S."
  6. No stains may be sewered.

NOTE: Never dilute any concentration in order to meet sewer limit concentrations.