Environmental Engineering For Sewer Discharges Of Industrial Wastewater


This paper is one in a continuing series concerning environmental engineering, which is one of the services provided by our environmental consulting firm, Environmental Safety Consultants, Inc. (ESC). It is critical to make sure that your facility’s sewer discharges of industrial wastewater is acceptable to the entity operating the receiving wastewater treatment (sewer) plant. 

It is important that an environmental engineer evaluate the discharge, hopefully, before it begins. The discharge must be acceptable or pre-treated to be acceptable to the plant. This is required under the federal Clean Water Act mandated by the U.S. Environmental Protection Agency (EPA, www.epa.gov) and quite often is implemented via a local Sewer Use Ordinance, usually at the county level. 

Why Worry? 

The attitude may be, “Well, we are paying for the sewer discharge, so what does it matter?” Actually, it matters a whole lot. The discharge may knock out the microbiological organisms at the wastewater treatment plant so that it can no longer treat sanitary sewer water which it was designed to treat. It could cause an explosion, or it could pollute the surface water receiving the plant’s discharge. Alternatively, it could pollute the aquifer if the plant is discharging the effluent to groundwater (underground injection). The list goes on and on. But, one of the most compelling reasons is that you could be in violation of the Sewer Use Ordinance and subject to huge fines! 

How Will They Know? 

The Sewer Authority can do sewer discharge tracing. They have access to lift stations and through inspection and testing, plus evaluating the facilities in the neighborhood, they can trace the discharge to your facility fairly easily. It is not that difficult. Believe me, we have seen it happen to more than one industrial facility. 

What’s a Facility to Do? 

First, read the Sewer Use Ordinance closely. It typically lists substances or certain properties of substances which are not allowed to be discharged. So if your effluent has any of those substances, you are dead in the water, right? Not necessarily so. Working in concert with your representatives, ESC’s environmental engineer may be able to come up with one or two of the following solutions: 

  • Change the process generating the contaminant(s) 
  • Chemical substitution – generating acceptable wastewater 
  • Segregate the components and properly dispose of any hazardous wastes prior to discharge 
  • Treat the wastewater before discharge – options include flocculation, primary & secondary settling, aeration, & filtration 
  • Discuss alternatives with the Sewer Authority 

In evaluating your wastewater and the treatment options the environmental engineer may very well need to conduct sampling and analysis of your wastewater before discharge; after treatment on a bench scale basis; after full implementation of treatment; and on a periodic basis depending on the Sewer Authority’s requirements and to monitor your treatment process. 

Environmental Safety ConsultantsSo there is a discussion of the environmental engineering related to sewer discharges of industrial wastewater! If you need any assistance, ESC (www.escflorida.com) is here. We are a Florida licensed environmental consulting and Florida licensed environmental engineering firm with a P.E. on staff. We have the credentials and experience to help you with your industrial wastewater sewer discharge needs. We are just a telephone call (800-226-1735) or an e-mail away (escinc@verizon.net). Contact us today!

Environmental Engineering for NPDES Stormwater Pollution Prevention Plan (SWPPP)


So far, we have provided several papers on or related to environmental engineering, which is provided stormwater pollution by environmental consulting firms like ours, Environmental Safety Consultants, Inc. (ESC). We provided information on environmental permits, then went into an overview of environmental engineering. Next, we addressed industrial wastewater and, finally, air emissions control provided by an air engineer. There was also a paper discussing Florida NPDES (National Pollutant Discharge Elimination System) Industrial Stormwater requirements. Now we will discuss the Stormwater Pollution Prevention Plan (SWPPP).

Stormwater Pollution Prevention Plan (SWPPP)

The current paper will discuss environmental engineering required for an SWPPP (Stormwater Pollution Prevention Plan). The regulatory requirements are provided by both the U.S. EPA (Environmental Protection Agency, www.epa.gov) and the FDEP (Florida Department of Environmental Protection, www.floridadep.gov). The requirements discussed herein primarily cover manufacturing and industrial facilities with SIC (Standard Industrial Classification) Codes 21 – 39 with specific exposure to stormwater. 


The objective of the Stormwater Pollution Prevention Plan is self-evident from its name. That is, the SWPPP is prepared by an environmental engineer to prevent pollution of stormwater so it does not discharge and impact receiving waters. Why? Because if it does, it can impair the biological organisms and public health. 

Components of Stormwater Pollution Prevention Plan

In preparing the SWPPP, the environmental engineer first identifies the facility and describes its operations, location, and receiving surface waters. Then, information and data are gathered in the following areas to assess the facility’s impact to stormwater: 

  • Topography, runoff, & discharge point(s) 
  • Material inventory, quantities, & exposure 
  • Significant spills or leaks last three years 
  • Non-stormwater discharges
  • Pollutant sources & specific parameters 
  • Best Management Practices (BMPs) to control pollutants 

Based on the results of the preceding, the environmental engineer discusses the findings with the client, then prepares the SWPPP and submits it for review. It is important that the client be able to implement and use the plan to reduce or eliminate pollutants in the facility’s stormwater runoff. 


The client’s management must endorse the SWPPP and sign it as documentation. A Pollution Prevention Team is formed and identified in the SWPPP. Team members and other personnel receive training. Resources are committed to attain the plan’s objective by implementing the BMPs selected. Visual monitoring of the stormwater discharge is required quarterly and laboratory analysis may be required during the second and fourth years of the five year permit. All records are kept in the SWPPP and, thus, it is a living document. 

Environmental Safety ConsultantsSo there is a discussion of the preparation of an SWPPP by an environmental engineer! If you need any assistance, Environmental Safety Consultants (www.escflorida.com) is here. We are a Florida licensed environmental consulting and Florida licensed environmental engineering firm with a P.E. on staff. We have the credentials and experience to help you with your SWPPP. We are just a telephone call (800- 226-1735) or an e-mail away (escinc@verizon.net). Contact us today!