SFPUC’s Water Quality Notifications and Communications...
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Enio Sebastiani, P.E. SFPUC Water Quality Division Annual Water Quality and Technology Workshop November 9, 2016 SFPUC’s Water Quality Notifications and Communications Plan Update 1
Transcript of SFPUC’s Water Quality Notifications and Communications...
Enio Sebastiani, P.E. SFPUC Water Quality Division
Annual Water Quality and Technology Workshop
November 9, 2016
SFPUC’s Water Quality Notifications and Communications Plan Update
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Overview
• Purpose of Notifications and Communications Plan • History of Plan • Objectives for Revision 6 • Communication Process Flowchart • Water Quality Parameters & Action Levels • Notification Tools
Review Example Parameter Summary Sheets Notice Tier Determination Chart Templates
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Purpose of Plan
• Systematic & Rapid Response to Water Quality Variations Mandatory notifications to the SWRCB, wholesale customers
and the public as required by Title 22 Advisory notifications to the SWRCB, wholesale customers,
and the public
• Clear Guidelines for Notification Which water quality parameters? What are the action levels and notification process? Who should be notified and how soon? What should be included in the notifications?
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History of Plan
• The original plan was issued in February 1999 after State (CDHS) and wholesale customer input.
• Current version (Revision 5A, November 2010) updated regulatory content and references (e.g., State’s final IESWTR, federal LT2ESWTR), water quality targets, notification templates (e.g., EPA Revised Public Notification Handbook), and communications tools.
• This update will be the 6th edition of the plan and is targeted for completion by the end of this year.
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Objectives for Revision 6
• Update to conform with latest regulations (e.g., RTCR)
• Update key monitoring locations (e.g., IP2) and parameters (e.g., DBPs)
• Update specific advisory notice triggers to reflect current water quality targets Wholesale Customer Water Quality Committee meeting on May
11, 2016, developed revised specific advisory triggers
• Update templates, protocols & communication tools Simplify decision charts and templates to facilitate response
• Draft Revision 6 posted at http://sfwater.org/wholesale Comments requested by December 2
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http://sfwater.org/wholesale
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http://sfwater.org/wholesale
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Systematic Communication Process
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Specific Advisory Levels per Water Quality Committee
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WQ Parameter Monitoring Location Level Event Duration
Unfiltered Turbidity IP > 2 NTU > 30 minutes
Unfiltered Turbidity IP > 1 NTU > 2 hours
Total Chlorine IP & HTWTP ≤ 0.5 mg/L > 30 minutes
Total Chlorine IP & HTWTP < 1.5 mg/L > 2 hours
Total Chlorine IP & HTWTP > 3.3 mg/L > 2 hours
Free NH3-N IP & HTWTP > 0.2 mg/L > 2 hours
Total NH3-N IP & HTWTP 0 mg/L > 30 minutes
Fluoride IP & HTWTP < 0.5 mg/L > 2 hours
Fluoride IP & HTWTP ≥ 1.3 mg/L > 2 hours
pH IP & HTWTP < 8.2 > 2 hours
pH IP & HTWTP > 10.2 > 2 hours
TOC IP >25% change Blend change
Conductivity IP >50% change Blend change
TTHM IP & HTWTP > 64 µg/L Upon lab notice
HAA5 IP & HTWTP > 48 µg/L Upon lab notice
Systematic Communication Process
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Action Level Responses
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Water Quality Parameters in Updated Plan
• Summary sheets developed for 14 parameters • Parameter selections based on:
Regulatory significance Primarily health, but also aesthetic implications Probability of occurrence
• Each summary sheet identifies: Key monitoring locations SFPUC water quality target MCL or other regulatory requirements Action levels SWRCB notification requirements Public notification requirements
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Water Quality Parameters in Updated Plan
• The 14 parameters or summary sheets include: Unfiltered water turbidity Filtered water turbidity Source water coliform for unfiltered system Coliform Primary disinfection for unfiltered system Primary disinfection for filtration plants Secondary disinfection – POE residual for unfiltered system Secondary disinfection – POE residual for filtered system Minimum distribution disinfectant residual Maximum distribution disinfectant residual Fluoride Odor pH DBPs – TTHM and HAA5
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Example Parameter – DBPs
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Water Quality Parameters in Updated Plan
• The 14 parameters or summary sheets include: Unfiltered water turbidity Filtered water turbidity Source water coliform for unfiltered system Coliform Primary disinfection for unfiltered system Primary disinfection for filtration plants Secondary disinfection – POE residual for unfiltered system Secondary disinfection – POE residual for filtered system Minimum distribution disinfectant residual Maximum distribution disinfectant residual Fluoride Odor pH DBPs – TTHM and HAA5
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Example Parameter – Coliform
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Example Parameter – Coliform
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Example Parameter – Coliform
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Systematic Communication Process
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Tier 1 Notice Determination
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Tier 2 & 3 Notice Determination
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Notification Tools Review
• Revision 6 provides the following tools for preparing public notices: Title 22 requirements for notice content and format Standard mandatory language for designated contaminants Recommended language Boil Water Notice (BWN) and Unsafe Water Alert (UWA)
conditions for use Notice authorization and distribution procedures Foreign language translations Historical water quality communications and notices for
reference Templates to facilitate rapid notifications
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Notification Templates
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Tier 1 Templates No. Name File name
1 Boil Water Notice BWN.doc 2 Boil Water Notice Cancellation BWNcancel.doc 3 Unsafe Water Alert – Do Not Drink UWA-DNDrink.doc 4 Unsafe Water Alert – Do Not Use UWA-DNUse.doc 5 Unsafe Water Alert Cancellation UWAcancel.doc
Tier 2 Templates No. Name File name
6 Total Coliform Notice coliform.doc 7 Drinking Water MCL Standard Violation Notice chemradmcl.doc 8 Fluoride MCL Exceedance Notice fluoride-chronic.doc 9 SWTR Turbidity Exceedance Notice turbidity.doc
10 SWTR Failure of Disinfection Treatment Notice disinfection.doc Tier 3 Templates
No. Name File name 11 Monitoring Violations Annual Notice monitorviolate.doc
Other Templates No. Name File name 12 Blend Change Notice blend.doc 13 Temporary Aesthetic Issue Alert temporaryaesthetics.doc 14 Water Outages or Periods of Low Pressure Alert outages.doc 15 Illegal Access Notice illegalaccess.doc 16 Fluoride Overfeed Notice fluoride-acute.doc 17 Algal Toxin Notice algaltoxin.doc
Boil Water Notice Template
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Boil Water Notice Template
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Boil Water Notice Template
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Next Steps
• Incorporate comments through December 2 • Edit and format notification templates • Update appendices
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