ES&H Manual



8030 Appendix R1

Prohibited Sanitary Sewer Discharges



There are certain materials and chemicals that are strictly prohibited by Hampton Roads Sanitation District (HRSD) from disposal down the drain.  If you are uncertain about using any particular substance that could end up down the drain, contact the Jefferson Lab Material Safety Data Sheet (MSDS) Coordinator at ext. 7882 for assistance.


This appendix provides a list of prohibited materials that could be present at Jefferson Lab.  Other HRSD permit information is provided in ES&H Manual Chapter 8030 Appendix T1 Discharges to the Sanitary Sewer System.


Flammable Liquids, Solids, or Gases

·         solvents

·         oil-based paints

·         fuel oils, lubricants

·         combustible gases

·         gasoline

·         benzene


Toxic or Poisonous Liquids, Solids, or Gases

·         anti-freeze

·         pesticides


Wastes with a pH < 5.0 (acid materials)

·         water from distillation systems may be acidic

·         some general purpose cleaners may be strongly acidic

·         buffered chemical polish (useful to etch niobium cavities)


Solids or Viscous Substances that may Block Sewer System Lines


·         sand

·      ashes

·      plastics

·         asphalt

·      rags

·      metals

·         straw

·      feathers

·      glass

·         tar

·      paper cups

·      whole blood

·         mud

·      wood

·      industrial process shavings


Excessive Discharges: can overload the sewer system; avoid discharge of significant quantities of unpolluted water such as:

·         rainwater

·         stormwater

·         groundwater

·         street drainage

·         yard drainage


Petroleum or Mineral Based Oils

·         motor oil

·         animal or vegetable based oils

·         fats or greases

·         greases collected from the grease trap in the CEBAF Center kitchen


Wastes with excessively high BOD (Biological Oxygen Demand) or COD (Chemical Oxygen Demand) or decomposable organic content.

·         carbonaceous material (vegetable based oils)

·         oxidizable nitrogen (fertilizers)


Strongly Odorous Wastes


Wastes containing significant amounts of dissolved sulfides


Substances promoting toxic gas emissions when combined with water

·         concentrated acids or bases (including cleaning solutions)

·         calcium

·         lithium

·         potassium

·         metal hydrides


High temperature wastes that may increase treatment plant influent above 104°F (40° C) or higher


Wastes that require excessive amounts of chlorine to treat or disinfect

·         medical or biological wastes.  Refer to ES&H Manual Chapter 6800 Appendix T4 Regulated Medical Waste Management

Excessive amounts of low conductivity water, distilled water, steam condensate, or other condensate or cooling water discharge, or discharges from heat pumps.


Wastes that produce excessive discoloration

·         dyes

·         inks


Wastes that may precipitate, solidify, or become viscous between 50° and 100°F


Significant quantities of garbage or waste that cannot pass through a 3/8 inch (1 centimeter) screen


Any excessive quantity of blow-down or bleed water from cooling towers exceeding one third of the makeup water


Any significant quantities of single pass cooling water


Any quantities of radioactive material wastes

·         Consult RadCon to assist with disposal requirements for any radioactive waste.


Any significant quantities of inorganic material


All other materials that could disrupt the operation of the treatment plant


NOTE: Water may not be added to wastewater for the purpose of diluting wastes which would otherwise be unacceptable for discharge.



For any process waste that has not received specific HRSD approval for discharge, check with your Environmental, Safety, Health, and Quality (ESH&Q) staff before disposal.


As well, it is the duty of all personnel to minimize, correct, or prevent any discharge which most likely would have an adverse effect on human health or the environment.


Important Reminders:

·         Observe the list of prohibited discharges.  If you’re not certain, don’t discard the waste without asking your local ESH&Q staff for guidance.

·         Solid debris from cleaning operations should be separated from the wastewater, if possible, and put in the regular trash.


Contacts:  Administration Division/Facilities Management

·         Facilities Management Desk, ext. 7400











ESH&Q Division

Bill Rainey





This document is controlled as an on line file.  It may be printed but the print copy is not a controlled document.  It is the user’s responsibility to ensure that the document is the same revision as the current on line file.  This copy was printed on 6/4/2013.