1. Pretreatment Review of TPDES Permit Applications & How to Identify Industrial Users
Jessica Alcoser & David James
May 15, 2017
Water Quality Division
Texas Commission on Environmental Quality

2. Introduction
All publicly owned treatment works (POTWs) that discharge to a waterbody of Texas, must apply for a Texas Pollutant Discharge Elimination System (TPDES) permit. The application to discharge wastewater goes through a series of administrative and technical reviews before a permit is written and issued.

3. TPDES Permitting Process
Application Received by TCEQ
Administrative Review
Technical Review
Standards and Assessment Review
Draft Permit Sent for Comments
Pretreatment Review
Simple permitting process diagram

4. Pretreatment Review – Domestic Worksheet 6.0
All POTWs must complete Worksheet 6.0 as part of their TPDES permit application
Include Significant Industrial Users (SIUs), Categorical Industrial Users (CIUs), and other IUs discharging to the POTW
Based on total number, average process flow, and other information
Worksheet 6.0 – Industrial Waste Contribution. This worksheet requests information on the numbers and types of industrial users that contribute wastestreams to the POTW as well as any instances of interference or pass through that the WWTP has experienced in the past three years.
When the TCEQ pretreatment staff review Worksheet 6.0 of the permit application and find that the POTW is not receiving discharges from SIUs or CIUs, or other information to be considered, the staff will develop language for the contributing industries and pretreatment requirements section of the TPDES permit that we call Option 1.
**SPEAKING NOTE: In the future, application will need to include dental users

5. Pretreatment Review – Worksheet 6.0
Section 1.A:
Use results from water billing records or IU surveys
CIUs, SIUs, or Other IUs:
Enter “0” or “None” if none are discharging.
Do not enter “N/A”
Any issues in the sanitary sewer system or WWTP?
Include dates, duration, description of issue, and sources
Copy of the actual Domestic worksheet 6.0 – Industrial Waste Contribution Application Form, page 1.
Domestic Technical Report was updated Sept. 1, 2016 and can be found on TCEQ website

6. Pretreatment Review – Worksheet 6.0
Section 3:
Include required information for all SIUs and CIUs
B. Process Information:
Provide as much detail as possible
Copy of the actual Domestic worksheet 6.0 – Industrial Waste Contribution Application Form. Note that other IU’s are not included in No. 3.

7. Pretreatment Review – Worksheet 6.0
Section 3, Items C-E:
Describe the product, provide flows, and applicable pretreatment standards
Section 3: Industrial Interruptions
Describe any problems caused by IUs, i.e. interference or pass through
Copy of the actual Domestic worksheet 6.0 – Industrial Waste Contribution Application Form, page.

8. TPDES Permit - Pretreatment Options

9. TPDES Pretreatment Permit Language
“CONTRIBUTING INDUSTRIES AND PRETREATMENT REQUIREMENTS”
Option 1
POTWs not required to have an approved pretreatment program
Option 2
POTWs are required to conduct an industrial user survey (IUS) and may be required to develop a pretreatment program

10. TPDES Pretreatment Permit Conditions
Option 1
No approved pretreatment program
No development of a pretreatment program
No formal IUS
Permit Language Requirements
General and Specific Prohibitions
40 CFR §403.5
POTW notification requirements
New introduction of pollutants
Substantial changes in volume or character of pollutants
Require any indirect discharger to:
Comply with the reporting requirements of Sections 204(b), 307, and 308 of the Clean Water Act
The Contributing Industries and Pretreatment Requirements section of the TPDES permit will have pretreatment language based on the information in Worksheet Option 1 has the general and specific prohibitions. The majority of POTW’s are in this category. As discussed earlier, the general and specific prohibitions are included in the Opt. 1 language. In addition, the POTW must notify the TCEQ when there is a substantial change in the Industrial contribution to the POTW or anything that may impact the WWTP.

11. TPDES Pretreatment Permit Language
POTWs that are (or may) be required to develop a pretreatment program
Option 2
Activity No. 1
Submit an IUS
Due within 60 days of issued permit
Based on results, TCEQ will determine if program development is required or not
When Option 2 is assigned to a TPDES permit, it will include a table to complete for the IU survey.

12. TPDES Pretreatment Permit Language
Option 3
POTWs within an approved pretreatment program
SIUs are discharging to the specific WWTP
Option 4
No SIUs are discharging to the specific WWTP

13. TPDES Pretreatment Permit Language – Options 3 & 4 WWTPs:
Have an approved TPDES pretreatment program
40 CFR Part 403 requirements
Technically based local limits (TBLLs)
Annual Report
Notification Requirements
Option 4
Covered under approved TPDES pretreatment program
No SIUs in the service area of the plant
WWTP Influent/effluent sampling not required
Notification requirements still apply
This slide outlines TPDES Pretreatment Option 3 and 4 requirements.
Written certification of TBLLs reassessment is Form No
OPTION 3:
TBLLS: Reassessment certification of existing TBLLS or notification to redevelop existing TBLLs ; Either due 60 days after permit issuance
Annual Report: Due on specified month, WWTP influent/effluent monitoring, List of SIUs in significant noncompliance (SNC) and newspaper publication
Notification Requirements: New introduction of pollutants, Substantial changes in volume or character of pollutants
OPTION 4:
TBLLS may applicable through the pretreatment ordinance, based on allocation method used.
Since the permit does not have influent/effluent sampling, the notification requirements are really important because industries may begin discharging during the permit term, and the notification usually comes through the annual report, for example.

14. Industrial Users Identification and Survey

15. Problems and Discharges to Consider
Collection System:
Stoppages or overflows?
Corrosion of lines?
Wastewater Treatment Plant:
Exceeding permit discharge limits?
Biomonitoring or WET failures?
Exceeding sludge criteria for its disposal method?
Unusual or noxious odors?
Industrial Users (IUs)
Excessive amounts of pollutants or hydraulic loads?
Excessive fats, oils, or grease (FOG)?
Wastewater with high or low pH?
POTWs need to identify and to evaluate potential problems at the WWTP. These problems include collection system stoppages and overflows, effluent violations, and sludge contamination. Once you identify the problem (e.g., high pollutant loadings, high flows, oil & grease, or pH extremes), the next step is to identify possible industrial sources. The picture denotes a sewer overflow from a manhole.

16. How to Identify Industrial Users
Water billing records
Applications for sewer service
Building permits
Property tax records
POTW collection system personnel
POTW treatment plant operators
As mentioned earlier, to identify IU’s, one may begin by looking at water billing records, applications for sewer service, building permits, property tax records, POTW staff, as well as consulting with the City personnel. Wastewater collection system and wastewater treatment plant personnel frequently know of problem dischargers.

17. How to Identify Industrial Users (cont.)
Business and telephone directories
Texas Manufacturer’s Directory
Chamber of Commerce records
Economic Development organizations
Direct observation (drive-by)
Internet searches
Toxic Release Inventory (TRI)
EPA Envirofacts
Hazardous Waste Generators
Examples of other resources you can use to identify industrial users include business directories such as the Texas Manufacturer’s Directory, telephone, chamber of commerce records, Economic Development organizations, drive-bys and the internet, such as the TRI and Envirofacts that can help identify industries that may discharge toxic or hazardous substances.
Trade Associations (e.g. metal finishers, etc.)
Ask your currently permitted industries of any known competitors in the area, etc.
Contributions to the POTW may be from connections outside the service area or City limits.
Once you have exhausted these resources, you will have made a master list of industrial users located in the POTW’s service area

18. Facility Types – Commonly Missed
Small metal plating facilities
Metal Finishing (40 CFR Part 433)
Truck washing facilities
Transportation & Equipment Cleaning (40 CFR Part 442)
Grease & Grit Processing facilities
Centralized Waste Treatment (40 CFR Part 437)
Facilities with no categorical pretreatment standards
Hospitals (40 CFR Part 460)
Meat and Poultry Products (40 CFR Part 432)
Plastic Molding and Forming (40 CFR Part 463)
And several others
Some of the common types of facilities that are overlooked are listed here. For example small metal plating facilities, or facilities that do not have categorical standards and facilities that might impact the collection system as well as the WWTP. For example, meat and poultry facilities do not have categorical standards. However, due to their high strength waste they may impact the POTW. Some truck washing facilities may be subject to the TEC depending on what they hauled and the volume of wash water used. Grease and grit trap processing facilities may be subject to CWT categorical pretreatment standards due to grit processing. Hospitals have cafeterias and may possibly discharge metals or certain hazardous wastes. Possibly industrial laundry facilities could give you problems due to the volume, temperature, metals, oily wastes, or high-strength waste.

19. Industrial User or Waste Survey
COMPILE MASTER LIST OF POTENTIAL IUs IN SERVICE AREA – CONSIDER…
IUs with high water usage
IUs that might impact the POTW
Standard Industrial Classification (SIC) code
North America Industrial Classification System (NAICS) code
Compare SIC or NAICS codes to categories: 40 CFR Parts
The industrial user survey includes commercial users that are sources of any pollutants of concern, such as photo processers, dentists, and restaurants. In order to determine if these facilities use and discharge process wastewater and obtain additional information about them, you will want to send out a questionnaire or survey form requesting this information. The TCEQ is happy to share the form with you that developing pretreatment programs must use.

20. Industrial User Survey (cont.)
Survey each IU to collect information
Conduct follow-up inspections
Conduct follow-up telephone calls
Summarize data
Maintain and update IU list

21. How to Identify HW Generators in Your Area
1. Select Geography Search and enter information for:
“Zip Code” or “City,” “County,” and “State.”
Use 5-digit Zip Code
Use state abbreviation (AR, LA, OK, NM, or TX)

22. HW Generator Search 1. Select Search Value to use RCRAInfo only.
2. Select Search Box to generate the report.

23. How to Identify TRI Transfers to POTWs and the corresponding POTW discharges to Receiving Stream
Use TRI Transfers to POTW Tool
Use DMR Pollutant Loading Tool

24. Who reports TRI Waste Transfers to POTWs?
1. Select “Waste Transfer Reports” then “Facility” tabs.
2. Click on Geographic Location and then select ZIP Code or State or a County in the pop-up menu that will appear.
3. Only select the 2 “Transfers to POTWs…” Click on each box to select or deselect.
Note that Total Transfers Off-site for further Waste Management remains selected.
4. Click Generate Report tab to create list.

25. Who reports TRI Waste Transfers to POTWs?
This Waste Transfer Facility Report shows the list of facilities in Travis County, TX that transferred wastes to a POTW in 2015
This particular facility transferred 30,804 pounds of NITRATE COMPOUNDS to a POTW in 2015.
Click on the Name of the Facility. Then click on TRI Reporting Forms link. Scroll down to Section 6 to find out which POTW.

26. How to Identify Dental Facilities
1. Click on the far left tab “Consumers”
2. In the drop down menu, choose “Licensee Information Lists”

27. How to Identify Dental Facilities
3. Locate the “Download Our Database section” towards the bottom of the page
4. Click on the “Dentist.csv” to download the data file.

28. Pretreatment Team
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