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PROPOSED REGIONAL GROUNDWATER REMEDIAL ACTION ROOSEVELT IRRIGATION DISTRICT June 11, 2010. AGENDA. Introduction of RID Project Team Overview of RID Remediation Project Communications/Web Site Question & Answer. Roosevelt Irrigation District RESPONSE ACTION TEAM. - PowerPoint PPT Presentation
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PROPOSED REGIONAL GROUNDWATER REMEDIAL ACTION ROOSEVELT IRRIGATION DISTRICT
June 11, 2010
AGENDA Introduction of RID Project Team Overview of RID Remediation
Project Communications/Web Site Question & Answer
Roosevelt Irrigation DistrictRESPONSE ACTION TEAM
Stan Ashby – RID Superintendent Synergy Environmental – Technical Paul Hendricks – Water Development Lawrence Moore – Public Outreach Gallagher & Kennedy – Legal
Phase 1 Objectives
• Primary water supply from 52 wells in west Phoenix• Groundwater from this area has lower TDS than wells in
RID Service Area• 31 wells are impacted or threatened by widespread
groundwater contamination from “Superfund” site• Contamination caused by Volatile Organic Compounds
ROOSEVELT IRRIGATION DISTRICT
RID OBJECTIVES Mitigate VOC impacts at RID Wells to allow
unrestricted operations and maximize beneficial use of water supply
Protect human health and the environment by reducing exposure to VOCs
Prevent further groundwater quality degradation Begin restoration of groundwater Maximize use of existing infrastructure to fast
track response actions
West Van Buren Remediation InvestigationDraft report genesis of RID remediation project
One of the largest plumes of contaminated groundwater in U.S. Multiple sources of volatile organic compounds (VOCs) from
numerous Potentially Responsible Parties are principal problem
West Van Buren AreaWest Van Buren AreaWQARF SiteWQARF Site
CONTAMINANT IMPACT ON RID WELLS
West Van BurenWQARF Site
Van Buren Avenue
VOC PLUME
PRP/Source
OU-3
> 50,000 gpm
Van Buren Street
Threatened WellsImpacted Wells
Pipe/Canal
RID’s TWO-PHASE REMEDYCost-Effective Response Action
Provides a comprehensive and effective regional pump and treat remedy that maximizes existing RID infrastructure
Restores ~ 50,000 gallons per minute of impacted water supply – Early Response Action: pump and treat 10 most
highly contaminated wells – Supplemental Response Action: identify best
approach to address peripheral wells
WESTCENTRALPHOENIX
WQARF SITE
WEST VAN BUREN AREA WQARF SITE
PRP/Source
Van Buren Street
? ? ? ?? ?
Estimated Extent of VOC Contamination
PLANNED EARLY RESPONSE ACTION
32 RID Wells in the Vicinity21 RID Wells Contaminated by VOCs17 RID Wells Exceed VOC Standards
RID Salt Canal
NEW TREATMENT FACILITY• Centralized Plant at RID Property• Treatment to Drinking Water Standards• Remove VOCs from Water and Air
PUMP & TREAT ~20,000 gpmVOC MASS REMOVAL ~ 5,700 pounds/year
EARLY RESPONSE ACTIONKEY COMPONENTS
Tie-in and treat 10 most contaminated wells Expediently mitigate public health exposures Prioritize pumping to maximize response action
benefit; no new pumping Utilize existing infrastructure Make essential upgrades to ensure safe and
efficient long-term operations Implement in 18 - 24 months
IN SUMMARY … RID pumping is not optional Current situation unacceptable ADEQ lacks financial resources to implement
groundwater remedy Early Response Action will:
Restore and provide treated water to RID Enhance the control, management, and
cleanup of groundwater contamination Protect public health and welfare
RID Water Right Three governing agreements between RID and
SRP in 1921, 1927, and 1950 Deeded existing wells and land in Fee Simple Contracts provide RID the “right” to pump
groundwater for all beneficial uses into future Limits pumping to 155,000 acre-feet year Authority to convey water to RID service area
codified in 1980 Groundwater Management Act
ROOSEVELT IRRIGATION DISTRICT
PROJECT COMMUNICATIONS
Lawrence E. Moore, Ph.D.
Stakeholder and Constituency
Focus
Media Relations Community
Relations Public Outreach
QUESTIONS?