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West Lake UpdateJanuary 11, 2016
Message from Mark Hague,EPA Region 7 Regional Administrator
2015 was a busy year atthe West Lake Landfill Su-perund Site in Bridgeton,Mo. We’ve completed fieldinvestigations necessary tourther define the extent
and location o the radio-logical materials at the site,which is a critical step tomove us toward proposinga final remedy by the endo 2016. We also recentlyannounced our decision
or the installation o an in-ground, physical isolationbarrier on site along with other engineering controls. In recent years, EPA has directed and overseen nu-merous air, soil and groundwater tests related to theWest Lake Landfill. Te scientific data demonstrates
that the wastes at the landfill do not currently pose anoff-site health risk to the surrounding community.
A recent Agency or oxic Substances and DiseaseRegistry’s health consultation confirmed previous EPAand Missouri Department o Natural Resources assess-ments that show groundwater, air, and soil data do notindicate a current health risk to communities sur-rounding the West Lake Landfill.
As the lead regulatory agency at the West Lake Land-fill Superund Site, EPA will continue to direct andoversee plans and actions that will lead to a proposedfinal remedy decision or the site by the end o 2016.At that time, EPA will present the proposed final rem-edy decision to the community with an opportunityto comment. Afer the public comment period closes,EPA will release a final decision.
We have a lot o work planned or 2016 to meet thisgoal. In December 2015, EPA reached an agreementwith Bridgeton Landfill, LLC; Rock Road Industries,Inc.; and Cotter Corporation to prepare and submitan updated summary o all sampling investigations atthe site, reerred to as a Remedial Investigation Adden-dum. In addition, the responsible parties will submit
a Final Feasibility Study in which they evaluate the various remedial options against specific criteria asrequired under the Superund law.
Please visit www3.epa.gov/region07/cleanup/west_lake_landfill/ to stay updated about ongoing work atthe site.
Highlights from 2015
EPA Calls for an Isolation Barrier atthe Site
Afer careul consideration o available scientificinormation, EPA has decided it is prudent to proceedwith the installation o a physical isolation barrier atthe site. Te decision also calls or the installation oother engineering controls, such as cooling loops, tourther mitigate the potential impact o a subsuracesmoldering event reaching radiological materials. Teagency is now working through the highly complexdetails o implementing this decision and the associ-
ated legal steps. Te details o the plan will be releasedto the public once finalized. EPA will continue to work closely with the MissouriDepartment o Natural Resources, U.S. Army Corpso Engineers and other stakeholders related to thisdecision. Te agency will use all available enorcementauthorities to ensure implementation o this work.
EPA Orders West Lake LandfillParties to Implement Surface FirePrevention Measures
EPA Region 7 in December issued a UnilateralAdministrative Order (UAO) to Bridgeton Landfill,LLC; Rock RoadIndustries, Inc.; andCotter Corpora-tion to develop andimplement suracefire preventionmeasures at theWest Lake LandfillSite. Te order ol-
West Lake Landfill Superfund Site: 2015 in Review
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ws a surace fire incident at the landfill. Tat suracere did not contact any radiologically impacted mate-al (RIM).Te parties must submit a surace fire preventionork plan to the agency that includes plans or takingown vegetation in the areas in Operable Unit-1 (OU-
where RIM is known to be at or near the groundrace, and placement o a non-combustible cover
ver areas where RIM is at or near the surace.It must also include plans or air monitoring to en-re protection o on-site workers and the surrounding
ommunity during clearing o trees and vegetation asell as during placement o non-combustible material.As a part o its continued coordination with itsartners at the site, EPA will engage with local firstsponders, including the Pattonville Fire District, toorm responders o the work plan and Incident Man-
gement Plan submitted by the parties.Each o the parties has notified EPA o its intent to
omply with the Order. Te Order requires the parties
submit two work plans that will detail the necessaryrace fire prevention actions as well as the prepara-on o an Incident Management Plan. Following EPA’sview and approval, the final work plans will be avail-le to the public on EPA’s West Lake webpage.Te order is available on EPA Region 7’s West Lakeandfill web site:ww3.epa.gov/region07/cleanup/west_lake_landfill/
Additional Radiologically ImpactedMaterial Characterization Field Work
ompletedTe major ocus o field work in 2015 was the com-etion o additional site characterizations in Oper ablenit 1, Areas 1 and 2, to identiy the extent o radio-gically impacted material (RIM). Te completion
this site work was critical to EPA’s continued workward the final site remedy as well as evaluating loca-
ons or the isolation barrier.Defining the scope and location o RIM is critical tocurately evaluate all remedial alternatives, includingll and partial excavation options.Te potentially responsible parties used gamma cone
netrometer testing to screen or gamma radiation in AreaFollowing that, the PRPs collected over 25 samples in
reas 1 and 2. Tose samples will be analyzed or the ol-wing isotopes: Radium-226, Radium-228, Torium-230,
Torium-232, Uranium-234, Uranium-238, Actinium-227,otassium-40, Protactinium-231, Scandium, and Lead-210.All corings were completed in December, with laborato-analysis, data verification, and preparation o the final
port to ollow. EPA expects the final report to be avail-le by late Spring 2016. Te report will be posted to EPA
egion 7’s West Lake Landfill website when complete.
EPA Completes an EnforceableSchedule for Completion of a FinalFeasibility Study In December 2015, EPA and the potentially responsi-ble parties reached agreement on dates or the submis-sion o a Remedial Investigation Addendum, includingan updated Baseline Risk Assessment, and a Final Fea-sibility Study. Each o these steps are critical milestonesnecessary to support the final decision on the soilsin Operable Unit 1 at the site. A draf work plan wassubmitted to EPA in late December or review. Follow-ing review and approval, the work plan will be madeavailable to the public on the West Lake website.
EPA Releases Off-Site Air DataSummary Reports for Radiationand Volatile Organic Compounds
In February, EPA released the results o off-site airmonitoring conducted over the course o a year infive areas around the West Lake Landfill to docu-ment baseline conditions prior to any potential on-siteconstruction or work. EPA’s efforts to monitor t he airand conduct a thorough scientific analysis are vital toensuring any construction activities are protective opublic health.
EPA released two reports that ocus on two t ypes ocontamination that are o particular importance to theagency’s work at West Lake Landfill--radiation and volatile organic compounds (VOCs). What the datashow EPA scientists is that t he people around WestLake Landfill are not being exposed to levels o radia-tion or VOCs at concentrations greater than what isound in similar industrial cities including St. Louis.
Te main effort o EPA’s monitoring system was tosample or alpha, beta, and gamma radiation, andtypical solid waste landfill gases, including VOCs. Teradiation levels measured by EPA are consistent withother Midwest cities. For alpha and beta radiation, allmonitored median values were consistent with median values or the air monitor placed in St. Charles. EPAplaced this monitor in St. Charles to act as a reerenceor the monitors placed in the immediate area o theWest Lake Landfill. Gamma radiation monitors aroundWest Lake Landfill showed values that were also con-sistent with the variability o natural geological radia-
tion sources in the area.
Tese air monitoring reports are available on EPARegion 7’s West Lake L andfill website: www3.epa.gov/region07/cleanup/west_lake_landfill/
o find more stories, and stay updated about all workat the site, visit :
www3.epa.gov/region07/cleanup/west_lake_landfill/.
Community InquiriesBen Washburn913-551-7364
Find Us Onwww.acebook.com/WestLakeLandfillSuperund
www.twitter.com/WestLakeSitewww.epa.gov/region7/cleanup/west_lake_landfi
West LakeLandfill Map
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EPA Region 7
11201 Renner Blvd, Lenexa, KS 66219
(800) 223-0425
www3.epa.gov/region07/cleanup/west_lake_landfill/
