Industrial Pretreatment

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Industries in the categories listed in Table 1 or potential dischargers of prohibited wastes listed in Table 2 are required to participate in the Pretreatment Program.

Table 1 - Industrial Categories

Adhesives and Sealants Explosives Nonferrous Metals Forming Porcelain Enameling
Aluminum Forming Food Processing Plants Ore Mining and Dressing Printing and Publishing
Automatic and Other Laundries Gum and Wood Chemicals Organic Chemicals Pulp, Paper and Paperboard
Batteries Hospitals Packing Houses Rendering
Bottling Plants Ink Formulation Paint Formulations Rubber Processing
Canneries Inorganic Chemicals Petroleum Refining Soap and Detergents
Coal Mining Iron and Steel Pesticides Steam Electric Power Generating
Coil Coating Laboratories Pharmaceuticals Textile Mills
Copper Forming Leather Tanning and Finishing Photographic Timber Products Processing
Electrical and Electronic Products Metal Finishing Plastic and Synthetic Materials
Electroplating Metal Molding and Casting Foundries Plastics and Synthetics
Table 2 - Prohibited Waste

Flammable or explosive substances
Highly toxic and poisonous substances
Substances which may obstruct flow
Strongly odorous wastes
Uncontaminated water (such as cooling water, roof runoff, etc.)
Pretreatment sludge
Wastes with temperatures over 150°F or which cause the temperature at the treatment plant headworks to exceed 104°F
Most radioactive wastes (in excess of state guidelines)
Wastes which contain or result in the production of toxic, corrosive, explosive or malodorous gases
Wastes that interfere with wastewater treatment processes
Petroleum oil, nonbiodegradable cutting oil, or products of mineral origin in amounts that pass through or interfere with the treatment plant processes
Trucked or hauled wastes, except at discharge points designated by the District


Industrial customers follow these four steps to participate in the DSRSD Pretreatment Program.


  1. The customer completes an Industrial Wastewater Discharge Permit Application
    and submits it to DSRSD.
  2. DSRSD reviews the permit application and conducts an industrial
    waste inspection.
  3. DSRSD issues an Industrial Wastewater Discharge Permit to the customer.
  4. The customer and DSRSD begin implementing permit provisions, including monitoring industrial waste and submitting reports.

Permit Application

All industries are asked to complete an Industrial Wastewater Discharge Permit Application to determine whether they are required to participate in the District’s Pretreatment Program. Send the completed application to:

Dublin San Ramon Services District
Environmental Compliance Division
7399 Johnson Drive
Pleasanton, CA 94588

Contact Senior Environmental Compliance Inspector Erik Kuefner at (925) 875-2335 with questions regarding the Pretreatment Program or the permit.


Industrial Wastewater Inspection

After the permit application has been received and reviewed, DSRSD will schedule an industrial waste inspection at the customer’s facility. An inspection consists of a facility tour and a separate interview to discuss the customer’s application and its waste-generating processes, water consumption, wastewater composition, and quantities of wastewater flow.

A tour of the plant facilities completes the inspection process. Operations that contribute wastes to the sewer system, chemical storage areas, and pretreatment facilities must all be inspected. An important part of the tour is identifying an industrial waste sampling location that will be used both for self-monitoring and Pretreatment Program monitoring. It is the customer’s responsibility to provide an adequate sampling location in accordance with District requirements.

Discharge permit conditions will be based on the inspector's report and the permit application.

Industrial Wastewater Discharge Permit

The customer’s Industrial Wastewater Discharge Permit defines maximum concentrations of specific substances allowed in its wastewater discharge. To document compliance, the customer may be asked to keep operation and maintenance logs, monitor discharge quality through periodic sampling and analysis, file compliance certification reports, and develop spill response plans. Some industries may be required to pretreat their wastes in order to comply with these limitations.

The DSRSD Pretreatment Program establishes local discharge limits that apply to all permits. For some industries, the EPA may issue national industrial waste categorical standards that could be more stringent than those imposed by the District's Pretreatment Program. In these cases, as required by EPA, the more stringent standards would become part of the customer’s discharge permit.

Industrial Wastewater Fees

Businesses participating in the Pretreatment Program pay fees that reflect the staff effort involved in permitting, monitoring, and lab analyses. Other fees may apply as a result of enforcement actions.

Forms and Resources



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