Local Water Utilities United for Safe Drinking Water

Wellhead Protection Plan

Executive Summary

View the Executive Summary

  • Data Resources Information
  • Wellhead Protection Area Delineations
  • Public Education/Involvement
  • Wellhead Risk Ranking and Assessment
  • Contaminant Source Inventory
  • Contingency Plan Technical Report
  • Management Plan

Acronyms and Abbreviations

1 Introduction

View Chapter 1

  • 1.1 Background
  • 1.2 Regulatory
    • 1.2.1 SAJB Water Supply Description
    • 1.2.2 Funding Mechanism
    • 1.2.3 Wellhead Protection Regulations
    • 1.2.4 Susceptibility Assessments
  • 1.3 WHP Report Contents
    • 1.3.3 Data Resource Information
    • 1.3.4 WHP Area Delineation
    • 1.3.5 Public Education/Involvement
    • 1.3.6 Wellhead Risk Ranking and Assessment
    • 1.3.7 Potential Contaminant Source Inventory
    • 1.3.8 Contingency Plan Technical Report(s)
    • 1.3.9 Management Plan

2 Data Resource Information

View Chapter 2

  • 2.1 Introduction
  • 2.2 Water Level Monitoring Network
  • 2.3 Monitoring Well Installation
  • 2.4 Discrete Water Level Monitoring Event
    • 2.4.1 Water Levels
    • 2.4.2 Pumping
  • 2.5 Continuous Water Level Monitoring
  • 2.6 Aquifer Testing
    • 2.6.1 Aquifer Test Summaries
    • 2.6.2 Data Analysis
  • 2.7 Spokane Valley Geophysical Investigation
  • 2.8 North Spokane Hydrogeologic Evaluation
    • 2.8.1 Introduction
    • 2.8.2 Microgravity Gradiometry Survey
    • 2.8.3 TEM Field Test
    • 2.8.4 North Spokane Deep Aquifer Evaluation
    • 2.8.5 North Spokane Aquifer Water Quality
  • 2.9 Pine River Park Evaluation
    • 2.9.1 Data Collection Network
    • 2.9.2 Data Evaluation and Capture Zone Analysis

3 Wellhead Protection Area Delineations

View Chapter 3

  • 3.1 Introduction
  • 3.2 Delineation Approach
  • 3.3 Delineation Procedures
    • 3.3.1Well/well-fields Within Spokane Valley Aquifer
    • 3.3.2 Mesh Modification (Well Locations)
    • 3.3.3 Other Model Modifications
    • 3.3.4 Delineation Results
  • 3.4 Calculations of Groundwater Elevations
    • 3.4.1 Particle-Tracking Procedure
    • 3.4.2 Wells Outside Spokane Valley Aquifer
  • 3.5 Delineations of SWHPAs
    • 3.5.1 SWHPAs
    • 3.5.2 Aquifer-Wide Delineation
  • 3.6 Overlap of SWHPAs
    • 3.6.1 Causes of Overlaps
    • 3.6.2 Notable Overlaps for SAJB Wells/Well-fields
    • 3.6.3 Implications for Management Planning

4 Public Education/Involvement

View Chapter 4

  • 4.1 Introduction
    • 4.1.1 Public Education and Program Unity
  • 4.2 Developing an Identity
  • 4.3 Public Presentations
    • 4.3.1 Post Office Box
  • 4.4 Newsletters
  • 4.5 Media
    • 4.5.1 News Releases
    • 4.5.2 Media Briefings
  • 4.6 Expo ’97 and the 1997 Spokane County Fair
  • 4.7 Political Meetings
  • 4.8 Video
  • 4.9 Meeting in a Bag
  • 4.10 Other Public Involvement Activities
  • 4.11 Web Site
  • 4.12 Survey
  • 4.13 Public Involvement Implementatio

5 Wellhead Risk Ranking and Assessment

View Chapter 5

  • 5.1 Introduction
  • 5.2 Examples of Risk Scoring Methods
  • 5.3 Risk Ranking Criteria – SAJB Method

6 Contaminant Source Inventory

View Chapter 6

  • 6.1 Introduction
    • 6.1.1 Background
    • 6.1.2 Contaminant Transport
  • 6.2 Sources of Information
    • 6.2.1 Spokane County’s Water Quality Management Program
    • 6.2.2 Environmental Protection Agency (EPA)
    • 6.2.3 Washington State Department Of Ecology (Ecology)
    • 6.2.4 County of Spokane Solid Waste Management Drycleaner Survey
    • 6.2.5 Washington State Department of Agriculture (WSDA)
    • 6.2.6 City of Spokane Fire Department Hazardous Materials List
    • 6.2.7 Local Water Purveyors Survey
    • 6.2.8 Historical Data
  • 6.3 Potential Contaminant Sites within Proposed Wellhead Protection
  • Areas
    • 6.3.1 Carnhope Irrigation District No. 7
    • 6.3.2 Consolidated Irrigation District No. 19
    • 6.3.3 East Spokane Water District No. 1
    • 6.3.4 Hutchinson Irrigation District No. 16
    • 6.3.5 Irvin Water District No. 6
    • 6.3.6 Kaiser – Mead
    • 6.3.7 Kaiser – Trentwood
    • 6.3.8 Liberty Lake Sewer/Water District
    • 6.3.9 Town of Millwood
    • 6.3.10 Moab Irrigation District No. 20
    • 6.3.11 Model Irrigation District No. 18
    • 6.3.12 Modern Electric Water Company
    • 6.3.13 North Spokane Irrigation District No. 8
    • 6.3.14 Orchard Avenue Irrigation District No. 6
    • 6.3.15 Pasadena Park Irrigation District No. 17
    • 6.3.16 Spokane County Water District No. 3
    • 6.3.17 Spokane Industrial Park
    • 6.3.18 Trentwood Irrigation District No. 3
    • 6.3.19 Vera Water & Power
    • 6.3.20 Whitworth Water District No. 2
  • 6.4 Delineated Aquifer Wide Protection Area
  • 6.5 Notification of Businesses/Facilities within SWHPAs
    • 6.5.1 Businesses
    • 6.5.2 Agencies
    • 6.5.3 Telephone Information Lines
    • 6.5.4 Response to Notifications
  • 6.6 Implementation Plan Contaminant Source Inventory
  • 6.7 Future Well Sites

7 Contingency Plan

View Chapter 7

  • 7.1 Introduction
  • 7.2 Contamination Detection
    • 7.2.1 Monitoring Wells/Contaminant Detection
    • 7.2.2 Production Well Contaminant Detection
  • 7.3 Individual Purveyor Contingency Plans
  • 7.4 Master Contingency Plan
    • 7.4.1 Emergency Responses
    • 7.4.2 Purveyor Operational Response
  • 7.5 Plan Updates
  • 7.6 Long-Term Goal

8 Management and Implementation Plan

View Chapter 8

  • 8.1 Introduction
  • 8.2 Notification of Businesses and Agencies
  • 8.3 Public Education and Outreach
    • 8.3.1 Advertisements and Notifications
    • 8.3.2 Summary of Meetings
  • 8.4 Citizens Wellhead Committee
    • 8.4.1 Introduction
    • 8.4.2 Meetings
    • 8.4.3 July 8 Meeting
    • 8.4.4 July 29 Meeting
    • 8.4.5 August 12 Meeting
    • 8.4.6 August 26 Meeting
    • 8.4.7 September 2 Meeting
    • 8.4.8 September 16 Meeting
    • 8.4.9 September 23 Meeting
    • 8.4.10 October 14 Meeting
    • 8.4.11 November 4 Meeting
    • 8.4.12 May 19, 1999 Meeting
  • 8.5 Focus Groups
    • 8.5.1 Introduction
    • 8.5.2 Meetings
  • 8.6 Community-Wide Telephone Survey
  • 8.7 Policy Coordinating Committee
    • 8.7.1 Introduction
    • 8.7.2 Proposed Implementation Action Items
    • 8.7.3 Implementation of “Consensus” Items
    • 8.7.4 Summary

Appendix

 

Table of Figures

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