City of Norman Silver Best Management Practices Program

1
City of NormanSilverBest Management
PracticesProgram

• Presented By
• Lyle Milby
• City of Norman
• Environmental Services

2
City of Norman Ag BMP

• Development
• Implementation
• Evolution
• Today

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Development

• BMP Program Development
• Why Control Silver
• Control Choices
• Resources

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Why Norman Controls Silver

• Extremely Stringent Water Quality Standards
• 0.49 Parts per Billion
• Treatment Plant Effluent Exceeded WQS
• No Substantial SIU Contribution

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Control Choices

• Issue Permits to Approximately 150 Businesses
• 150 Permits
• 150 Inspections
• 300 Sampling Events
• 300 Self-Monitoring Reports
• Develop and Implement a BMP Program
• gt 20 Inspection Rate
• 150 Self-Monitoring Reports

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Resources

• EPA Guidance Manual for Developing Best
  Management Practices, EPA 833-B-93-004
• Photo Marketing Association, Code of Management
  Practices http//www.pmai.org/environ/default.htm
• Yahoo Pretreatment Coordinators Group
  http//groups.yahoo.com/group/pretreatment_coordin
  ators/

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Implementation

• BMP Program Implementation
• Ordinance Modifications/Documentation
• Contact and Educate all the Players
• Follow up to Ensure Participation

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BMP Program Documentation

• Ordinance
• Add language describing the authority to
  implement and enforce a BMP program
• BMP
• Develop a document for the customer describing
  the program and what is expected of them.

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Contact Educate the Players

• Review Search
• Yellow Pages
• Member Association
• City Licensing Records
• Oklahoma State Department of Health Consumer
  Protection Agency
• Build a Database
• Access, Excel, Canned Programs
• Letters, Site Visits, Workshops
• Include Service Providers

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Follow up to Ensure Participation

• Direct Proof of Service
• Submission of Manifests or Invoices
• Letter of Participation
• Signed Statement Committing to the Program
• Inspections
• Proper Installation
• Good Housekeeping
• Good Recordkeeping

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Evolution

• BMP Program Evolution
• Review the Program
• Make Changes to Improve Efficiency and Output
• Implement the Changes

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BMP Program Review

• Are we getting the desired results?
• Are things running smoothly for us?
• Are things running smoothly for the participants?

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Desired Results? Effluent
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Desired Results? Influent
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Program Mechanics

• Are things running smoothly for us?
• Data Collection
• Data Tracking
• Meeting Program Obligations
• Program Costs

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Customer Satisfaction

• Reporting Burden
• Ease of Use

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Improvements

• Switched a system based on to the
  Code of Management Practices
• Changed from manifest submission to Letter of
  Participation
• Switched to Access database for tracking purposes

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Implement Changes

• Workshops
• Generators and Receivers
• Training
• City Personnel

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Program Components

• Notebook for each business
• Program Description
• Maintenance Logs
• List of Resources
• CMP Guide
• Guide for Commercial Imaging
• Guide for Diagnostic and Industrial X-Ray Film
  Processors
• Guide for Photo Processors

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Determination of Size

• Small
• Less than 1,000 gpd total process effluent or 2
  gpd of silver-rich solution
• Medium
• 1,000 to 10,000 gpd total process effluent or 2
  to 20 gpd of silver-rich solution
• Large
• 10,000 to 25,000 gpd total process effluent or
  more than 20 gpd of silver-rich solution

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Determination of Size

• Small
• 90 Removal
• No Analytical Laboratory Testing Required
• 1 or 2 Metallic Replacement Cartridge (MRC)
• Medium
• 95 Removal
• One Analytical Test per Year
• Electrolytic Unit Followed by 1 MRC
• Large
• 99 Removal
• One Analytical Test per Year
• Electrolytic Unit Followed by 2 MRC

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Silver-Rich Solutions

• Silverrich solution is defined as a solution
  containing sufficient silver that cost-effective
  recovery can be conducted on-site or off-site.
• Fixer
• Bleach-Fixers
• Stabilizers from Low-Flow Washes
• All Functionally Similar Solutions

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Silver-Rich Solutions

• Silver Concentrations Ranging From 1,000 to
  12,000 ppm.
• 1 Gallon of 10,000 ppm Diluted to 10,000,000
  Gallons is 0.001 ppm or 1 ppb

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Waste Handling Options

• Most Common Options
• Collect Haul
• Metallic Replacement
• Others Options
• Electrolytic Silver Recovery
• Ion Exchange
• Precipitation

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Metallic Replacement

• Metallic replacement is a reduction oxidation
  process. An overview of the reaction is
• 2Ag(S2O3)2 3 Fe0 ? 2Ag0 Fe2 4S2O3 2
• or
• Silver Thiosulfate Complex Metallic Iron ?
• Metallic Silver Ionic Iron Thiosulfate
• The silver concentration may be reduced to less
  than 5 mg/L.

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Metallic Replacement
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Where We Are Today

• Approximately 90 Businesses Participating
• Treatment Plant Effluent Well Within Water
  Quality Standards
• Documented BMP Program
• Generate Some Revenue to Cover Program Costs

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Questions / Discussion

• He who asks is a fool for five minutes, he who
  does not ask is a fool for ever.
• (traditional Chinese proverb)

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Thank You For Listening

• Contact
• Lyle Milby
• City of Norman
• Environmental Services
• P.O. Box 370
• Norman, OK 73070
• [phone]
• Lyle.Milby_at_NormanOk.gov