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Pretreatment Program Public Hearing 3/12/13. Why is this needed? What is involved? How does it affect Prescott businesses and industries?. Why?. Aquifer Protection Permit (APP). Wastewater Treatment Plant. Recharge Basins. Why?. Solids Total Suspended Solids (TSS). Organics

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Pretreatment Program Public Hearing 3/12/13


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pretreatment program public hearing 3 12 13

Pretreatment ProgramPublic Hearing 3/12/13

Why is this needed?

What is involved?

How does it affect Prescott businesses and industries?

slide2
Why?

Aquifer Protection Permit (APP)

Wastewater

Treatment Plant

Recharge

Basins

slide3
Why?

Solids

Total Suspended Solids (TSS)

Organics

BOD5, COD

Nutrients

Ammonia, Phosphorus

  • Other pollutants (e.g., metals or FOG) controlled by pretreatment limits or Best Management Practices
  • Wastewater Treatment Plants designed to remove pollutants/concentrations typical of domestic discharges
slide4
Why?

High pollutant concentrations discharged to sewer system can cause:

  • Blockages resulting in sewer overflows
  • Exceedance of APP limits (can result in Notice of Violation, Consent Order, or fines from ADEQ)
  • Additional cost in operation/maintenance of treatment facilities
slide5
What?

City’s Pretreatment Program will:

  • Reduce sewer overflows
  • Control discharges into sewer system
  • Protect wastewater treatment plants
  • Maintain high effluent and biosolids quality
  • Protect the public, City workers, and the environment
slide6
What?

Pretreatment Program Status

  • Updated Sewer Use Ordinance to establish legal authority for implementing pretreatment program
  • Developed Enforcement Response Plan (ERP)
  • Updated 2011 Local Limits Report
  • Conducting Industrial Waste Survey (IWS)
slide7
What?

Sewer Use Ordinance (City Code Ch 2-1)

  • Establishes responsibility and authority of Public Works Director
  • Includes prohibited discharges
  • Sets up permitting program
  • Describes enforcement options for noncompliance
slide8
What?

Enforcement Response Plan (ERP)

  • Establishes fair and consistent enforcement procedures
  • Ensures enforcement responses are appropriate to nature/severity of violation
  • Contains City’s enforcement options and potential fines
slide9
What?

Local Limits Update

  • Evaluates max pollutant loading that can be received at treatment plant and still meet APP permit limits
  • Calculates pretreatment limits that are site-specific and technically-based
  • Applies only to Significant Industrial Users (SIUs) as “controlled sources”
slide10
What?

Industrial Waste Survey (IWS)

  • Includes questions about facility operations and wastewater discharged
  • Used to assess nature/volume of wastewater discharged
  • Identifies commercial & industrial dischargers
slide11
What?

Significant Industrial Users

  • Subject to Categorical Pretreatment Standards
  • Discharge 25,000 gpd
  • Contribute 5% or more of hydraulic or organic capacity of treatment plant
  • Designated by City based on potential to impact treatment plant
slide12
What?

% Industrial Flow/ Influent

18%

Significant Industrial Users

AirportWRP

0.01%

Sundog WWTP

slide13
What?

Dry Cleaners

Auto Repair

Facilities

Medical / Dental Offices

Restaurants

Examples of Commercial Users:

slide14
What?

Sewer drain clogged with grease

Video of sewer line clogged with grease

Potential Impacts

slide15
What?

Grease balls at Sundog WWTP, caused overflow at headworks; grease decreases treatment plant efficiency

Potential Impacts

slide16
How?

With Pretreatment Program, City can:

  • Issue Industrial Wastewater Discharge Permits to Significant Industrial Users
  • Issue General Permits to commercial dischargers
  • Develop Best Management Practices for industrial and commercial dischargers
  • Perform Site Inspections
slide17
How?

Best Management Practices include:

  • Installing/maintaining grease interceptors/traps
  • Training employees
  • “Dry wiping” pots and dishware before washing
  • Recycling of used oils and solvents
  • Preventing leaks and spills from entering floor drains
next steps
Next Steps
  • Compile data from Industrial Waste Survey (IWS) currently in progress
  • Identify potential Significant Industrial Users
  • Work with Industrial Users to develop permits and compliance schedules
  • Perform cost benefit analysis of pretreatment program
next steps1
Next Steps
  • Assess impact from commercial dischargers
  • Develop outreach/education information for commercial dischargers
  • Identify BMPs for specific groups of commercial dischargers (e.g., food service)
  • Assess implementing general permits for some commercial dischargers
next steps2
Next Steps

4/30

City Council

Adoption

3/12

Public Hearing

5/1

Submit to

ADEQ

30-day Public

Comment Period

4/23

Public

Comments

Presentation

6/1*

ADEQ Approval

30-day Public

Comment Period

March 2013

April 2013

May 2013

June 2013

next steps3
Next Steps

Begin Permitting Significant Industrial Users (SIUs)

Outreach/education for Commercial Dischargers

1st Round of SIU sampling

Anticipated Schedule

July 2013

December 2013

pretreatment contact
Pretreatment Contact

City of Prescott

Utilities Operations – Water Protection

Jeremy Reynolds – Water Protection Specialist

(928)777-1615

jeremy.reynolds@prescott-az.gov

http://www.cityofprescott.net/services/water/protection.php