Presenters: Joel Janssen SpecPro Professional Services ... · 22.06.2015 · SpecPro Professional...
Transcript of Presenters: Joel Janssen SpecPro Professional Services ... · 22.06.2015 · SpecPro Professional...
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Presenters: Joel Janssen SpecPro Professional Services, LLC Woody Myers Department of Natural Resources
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Modified Interim Remedial Measures (MIRM) Groundwater Treatment System
• DNR approved Army’s plan to shut off the MIRM • Army sent out an update on June 22, 2015 • MIRM was placed in “stand by” mode on August 31,
2015 • Phase II of the Shut Down Plan is underway • Three rounds of quarterly groundwater sampling
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Gruber’s Grove Bay
• DNR has instructed the Army to collect additional sediment samples from Gruber’s Grove Bay
• A work plan will be submitted to the DNR in November; once approved it will be placed in the Repository
• Army will be performing the sampling this winter
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DNR Comments on Additional Sampling Gruber’s Grove Bay
• Driver for Gruber’s Grove Bay is ecological • There is not any Direct Contact threat
(human/dermal contact)
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Monitoring Well
Installation
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Monitoring Well Installation
• 11 new monitoring wells were installed along the eastern boundary during September & October
• New monitoring wells will be sampled in two weeks • Laboratory results will submitted to DNR in December • These monitoring wells will be part of routine
groundwater sampling program
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Monitoring Well Installation
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Groundwater Sampling
• Monitoring Well Sampling – Sept 2015 • 139 Monitoring wells sampled for DNT and some
cases VOC
• Groundwater plumes have not significantly changed
• Residential Well Sampling – Sept/Oct 2015 • 52 Residential wells sampled for DNT and some
cases VOC
• No Enforcement Standard exceedances
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Groundwater Analyses
• VOC Analysis - continues • Analyses include Carbon Tetrachloride, Chloroform, Ethyl Ether,
Trichloroethene, + 53 other compounds
• DNT (6 isomers) Analysis – continues
• Nitrate Analysis – continues at PBG
• Sulfate Analysis – continues at DBG
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Groundwater Sampling Summary Map updated
• New monitoring wells were added • Plume geometry slightly changed • Boundary for Nitrocelluose Production Area Plume
was added