PROTECTING OUR WATER RESOURCE
This presentation is the property of its rightful owner.
Sponsored Links
1 / 35

Stake Holders : Newport –Mesa Unified School District PowerPoint PPT Presentation


  • 89 Views
  • Uploaded on
  • Presentation posted in: General

PROTECTING OUR WATER RESOURCE. Stake Holders : Newport –Mesa Unified School District State of California, Orange County Health Care Agency State of California, EPA Costa Mesa Local Community Watch. Source: ADvTECH , 2008. Permission to use photos given. PROTECTING OUR WATER RESOURCE.

Download Presentation

Stake Holders : Newport –Mesa Unified School District

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Stake holders newport mesa unified school district

PROTECTING OUR WATER RESOURCE

Stake Holders:

Newport –Mesa Unified School District

State of California, Orange County Health Care Agency

State of California, EPA

Costa Mesa Local Community Watch

Source: ADvTECH, 2008.

Permission to use photos given.


Stake holders newport mesa unified school district

PROTECTING OUR

WATER RESOURCE

PUBH 8165

February 2, 2013

Presented by:

Michael Shiang

Doctoral Candidate in Public Health

Walden University


Stakeholders

Stakeholders:

  • Owner:

    • Newport-Mesa Unified School District

  • Agencies

    • State of California, Orange County Health Care Agency

    • State of California, Environmental Protection Agency

  • Public Group

    • Costa Mesa Community Watch

      Source: ADvTECH, 2008.


Discussion overview

Discussion Overview

□ Off-Site Feasibility Study/Remedial Action Plan

□ Historical Programs Conducted by NMUSD

  • On-Site Environmental Activities

    • Site Investigation/Monitoring Activities

    • Interim Remedial Actions

    • Removal Action/On-Going Cleanup Programs

  • Off-Site Environmental Investigation

    □ Community Concerns and Open Discussion


Fact sheet synopsis

FACT SHEET - SYNOPSIS

  • No Immediate Threat to Human Health or the Environment

  • No Drinking Water Supply Wells Threatened or Impacted

  • Detailed Reports – Geotracker Website http://geotracker.waterboards.ca.gov/profile_report.asp?global_id=T0605902072

    Source: State of CA, Geotracker, 2013.


Site map

Site Map

Source: ADvTECH, 2008.

Permission to use photos given.


Newport mesa unified school district time line environmental programs

NEWPORT-MESA UNIFIED SCHOOL DISTRICTTIME LINE – ENVIRONMENTAL PROGRAMS

Source: ADvTECH, 2010


Stake holders newport mesa unified school district

ON-SITE SOIL VAPOR EXTRACTION SYSTEM

Source: ADvTECH, 2008.

Permission to use photos given.


On site soil vapor extraction

Initiated in April 2007

6 VES, 6 Air-Sparge

Catalytic/Thermal Oxidizer Unit

45 scfm, 8-in Hg

O&M Conducted by ERI

Vapor Air Stream to Remove Contaminants in Soil

Initial Conc. = >10,000 ppmv TPH

Current Conc. = 200-400 ppmv TPH

Approx. ~ 8,500 lbs TPH Removed

ON-SITE SOIL VAPOR EXTRACTION


Stake holders newport mesa unified school district

ON-GOING QUARTERLY GROUNDWATER MONITORING

Source: ADvTECH, 2008.

Permission to use photos given.


Quarterly groundwater monitoring

2001 Started, Quarterly Data from about 2003

18 Wells On-Site

8 Wells Off-Site

Range in Depth from 35 – 50 ft-bgs

Monitors “First Water” at about 25 to 35 ft-bgs

Flow to Southwest

TPH, BTEX, MTBE and other Fuel Additives

Full VOC – mid 2007

QUARTERLY GROUNDWATER MONITORING


Stake holders newport mesa unified school district

Source: ADvTECH, 2008.

Permission to use photos given.


Stake holders newport mesa unified school district

Source: ADvTECH, 2008.

Permission to use photos given.


Stake holders newport mesa unified school district

Source: ADvTECH, 2008.

Permission to use photos given.


Tph concentrations in groundwater 4 th qtr 2008

TPH Concentrations in Groundwater 4th Qtr 2008

Source: ADvTECH, 2008.

Permission to use map given.


Approximate extent of groundwater plume overlay

APPROXIMATE EXTENT OF GROUNDWATER PLUME OVERLAY

Source: ADvTECH, 2008.

Permission to use photos given.


Stake holders newport mesa unified school district

OFF-SITE FEASIBILITY STUDY/RAP FOR GROUNDWATER CLEANUP

Source: ADvTECH, 2008.

Permission to use photos given.


Feasibility study

FEASIBILITY STUDY

  • Must Meet a Set of Regulatory Requirements

    • Describe situation

    • Propose clean up goal

    • Consider multiple alternatives

    • Discuss pros and cons of each alternative

    • Choose and justify preferred clean up method


Clean up goal

CLEAN-UP GOAL

  • Benzene is primary contaminant of concern, with lowest clean up level of contaminants present in the groundwater

  • Clean up will focus on benzene, and other contaminants (gasoline, toluene, ethyl benzene, xylenes) will be removed along with the benzene

  • MCL (maximum contaminant level) for benzene is 1 ug/L. The remedial system will be designed with the MCL as the clean up goal


Regulatory permitting agencies

REGULATORY/PERMITTING AGENCIES

  • City of Costa Mesa – Sanitation District

  • City of Costa Mesa – Encroachment Permit

  • Orange County Flood Control District

  • Orange County Health Care Agency

  • Orange County Sanitation District

  • South Coast AQMD

  • Santa Ana RWQCB


Alternatives

ALTERNATIVES

  • No Action

  • Monitored Natural Attenuation (MNA)

  • Enhanced Biodegradation

  • Chemical Oxidation

  • Air Sparging/Vapor Extraction

  • Groundwater Extraction and Treatment


Factors to consider

FACTORS TO CONSIDER

  • Impact to Neighborhood and School

  • Effectiveness of Clean Up

  • Duration of Project

  • Cost


No action mna biodegradation

No Action/MNA/Biodegradation

  • Allows continuing spread of contaminants

  • Not sufficiently aggressive in treating existing contamination

  • Not appropriate for this site, at this time


Air sparging vapor extraction chemical oxidation

PROS

Cost

Existing Air Compressor/ Treatment Unit On-Site

CONS

Releases Vapor into Subsurface

Multi-phase Remedial Option

Significant # of Wells

Greater Impact to Neighborhood

Air Sparging/Vapor Extraction/Chemical Oxidation


Groundwater extraction

PROS

Uses some Existing Monitoring Wells

Less Impact to Neighborhood

Less Piping/Trenches

Hydraulic Control

CONS

Cost

Generates Waste Water for Discharge to Sewer or Recharge

GROUNDWATER EXTRACTION


Groundwater extraction details

GROUNDWATER EXTRACTION DETAILS

  • Seven New Extraction Wells

  • Use Existing Monitoring Wells

  • Off-Site Staging Area in School Yard

  • Piping in Street/Parkway and Easement – Across or Under Flood Control Channel

  • Treatment Equipment can be Staged in Existing On-Site Compound

  • Wastewater Discharged to Sewer, Recharge or Storm Drain


Anticipated off site groundwater plume capture

AnticipatedOff-SiteGroundwater Plume Capture

Source: ADvTECH, 2008.

Permission to use photos given.


Groundwater extraction1

GROUNDWATER EXTRACTION

  • Cone of Depression

  • Multiple Wells Extraction

  • Phase-in Approach

Source: Cherry & Freeze, 2004.

Permission to use photos given.


Preferred method groundwater extraction summary

PREFERRED METHODGROUNDWATER EXTRACTION SUMMARY

  • Work Performed in Public Access Areas

  • Does Not Require Wells on Private Property

  • Generally Higher Cost, but much more Protective of Community Health and the Environment


What s next

WHAT’S NEXT?

  • Plan Approval

  • Finalize All Permits and Agreements

  • Engineering/Bid Process/Funding

  • Field Implementation

  • Start Extraction – SEPT 2012

  • Anticipated Extraction through 2018


Stake holders newport mesa unified school district

COMMUNITY CONCERNS


Stake holders newport mesa unified school district

COMMUNITY CONCERNS

  • How long is it going to take to clean up?

  • Is my water safe to drink?

  • Can I drink water from the school fountain?

  • Do I need to be concerned about growing vegetables in my back yard?

  • Will children be at-risk playing on the soccer fields?

  • What are the major disruptions to the community?

  • Will there be a lot of noise from the equipment?


Stake holders newport mesa unified school district

REFERENCES

THANK YOU FOR YOUR PARTICIPATION


References

References

ADvTECH Environmental, Inc. (2008). Feasibility Study, NMUSD. Consultants Report.

ADvTECH Environmental, Inc. (2009). Fourth quarter groundwater monitoring report. Consultants Report.

ADvTECH Environmental, Inc. (2010). Remedial Actions for the NMUSD site. Consultants Report.

Cherry, J., & Freeze, D. (2004). Groundwater. MacGraw Hill. Princeton University. (Check on proper citation).

Environmental Protection Agency. (EPA, 2012a). United States Environmental Protection Agency: Laws and regulations, Summary of the toxic substances control act, 15 USC 2601 et seq. (1976). Retrieved on December 26, 2012. Retrieved from http://www.epa.gov/lawsregs/laws/tsca.html.


References con t

References (con’t)

Environmental Protection Agency. (EPA, 2012b). United States Environmental Protection Agency: About EPA, Toxic substances law. Retrieved on December 26, 2012. Retrieved from http://www.epa.gov/aboutepa/history/topics/tsca/03.html.

Environmental Protection Agency. (EPA, 2013). United States Environmental Protection Agency: Underground storage tanks: UST program and site remediation. Retrieved on December 26, 2012. Retrieved from http://www.epa.gov/oust/

Moeller, D. W. (2011). Environmental health (4th ed.). Cambridge, MA: Harvard University Press. ISBN:978-0674047402.

Rizzo, J. (1998). Underground storage tank management: A pratical guide. Government Institutes. ISBN: 10—86587607X.

Robinson, J., Thompson, P., Conn, D., & Geyer, L. (1993). Issues in underground storage tank management UST closure and financial assurance. CRC Press. ISBN: 10-0873714024.


  • Login