HomeMy WebLinkAbout029_BozemanSolventSiteDEQCorrespondenceFrom:Fry, KateTo:Chris Naumann
Cc:Jim Sullivan; Bobby Egeberg; Christopherson, Sarah; DEQ QuickReq
Subject:RE: Bozeman Solvent Site
Date:Friday, June 14, 2024 1:28:41 PM
Attachments:image001.pngimage003.pngimage004.png
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Hi Chris,Thank you for reaching out about the Bozeman Solvent Site. The North Park (fka Mandeville Farm) project you describe
in your emails below is within the Bozeman Solvent Site. The main contaminant of concern for the Bozeman Solvent
Site is tetrachloroethene (PCE). Groundwater flow is from the south to the north. The closest Bozeman Solvent Sitemonitoring well to the project location shown provided is M-37. M-37 is located approximately 1500 feet to the northwestand cross/downgradient of Track 3-B. M-37 is near the northwest corner of Tract 2-B on the east side of MandevilleCreek. M-37 is sampled annually in June as part of the Bozeman Solvent Site. Below is a table summarizing PCE
concentrations in M-37 since 2017:
M-37June 2017 4.6 µg/L
June 2018 4.2 µg/L
June 2019 4.1 µg/L
June 2020 <0.5 µg/L
June 2021 3.6 µg/L
June 2022 <0.5 µg/LJune 2023 2.3 µg/L
In August 2011, the Montana Department of Environmental Quality issued the Record of Decision (ROD) for theBozeman Solvent Site. The ROD identified that the Bozeman Solvent Site site-specific clean up level (SSCL) for PCE in
groundwater is 5 µg/L. The ROD identified the final cleanup remedy for this portion of the Bozeman Solvent Site as
monitored natural attenuation (MNA). M-37 is part of the MNA monitoring program. As you can see, the PCEconcentrations in M-37 are below the SSCL. M-37 will be sampled in the next couple of weeks. Please let me know ifyou would like to know the results.
The ROD does not identify construction requirements related to the Bozeman Solvent Site in this area. However,construction may require a dewatering permit. The depth to groundwater in M-37 is less than 10 ft. I believe theConstruction Dewatering General Permit (CDGP) application requires the applicant to contact me regarding currentgroundwater plume conditions. This email may satisfy that requirement. Please note, the CDGP may have different
requirements for PCE concentrations than the Bozeman Solvent Site SSCL prior to discharge under a CDGP. In addition, your project is within the Bozeman Solvent Site Controlled Groundwater Area (CGWA). The CGWA isadministered by the Montana Department of Natural Resources and Conservation (DNRC). The CGWA limits the type
of groundwater wells that can be installed. Please contact DNRC for more information. This email only addresses concerns related to the Bozeman Solvent Site.
Please let me know if you have questions. Regards,Kate
Kate Fry | Senior Project Officer
Superfund, AML, and Construction Bureau
Waste Management and Remediation Division
Montana Department of Environmental Quality
Office: 406-444-6426
From: Chris Naumann <cnaumann@sandersonstewart.com>
Sent: Friday, June 14, 2024 12:44 PM
To: Fry, Kate <kfry@mt.gov>
Cc: Jim Sullivan <jsullivan@tasman-geo.com>; Bobby Egeberg <begeberg@sandersonstewart.com>
Subject: [EXTERNAL] RE: Bozeman Solvent Site
Thanks for responding so quickly, Kate.
Below is an image showing North Park Tract 3-B in Section 36.
Please let me know if you have any questions or need any additional information.
Chris Naumann
Associate Principal | Bozeman Branch Manager
t: 406-922-4311
m: 406-570-5758
From: Fry, Kate <kfry@mt.gov>
Sent: Friday, June 14, 2024 11:17 AM
To: Chris Naumann <cnaumann@sandersonstewart.com>
Cc: Jim Sullivan <jsullivan@tasman-geo.com>
Subject: RE: Bozeman Solvent Site
CAUTION: This email originated from outside your organization. Exercise caution when opening attachments or clicking links,especially from unknown senders.
Hi Chris,Can you provide a figure that shows where Track 3-B is in relation to North Park and the Bozeman Solvent Siteboundary? It would make DEQ’s review quicker.
Thanks,Kate
Kate Fry | Senior Project Officer
Superfund, AML, and Construction Bureau
Waste Management and Remediation Division
Montana Department of Environmental Quality
Office: 406-444-6426
From: Chris Naumann <cnaumann@sandersonstewart.com>
Sent: Friday, June 14, 2024 10:47 AM
To: Fry, Kate <kfry@mt.gov>; info@tasman-geo.com
Cc: Bobby Egeberg <begeberg@sandersonstewart.com>
Subject: [EXTERNAL] Bozeman Solvent Site
Good morning, Kate and Jim.
Per the City of Bozeman’s request, we are reaching out about the attached site plan and land development application within the
Bozeman Solvent Site boundary.
The project is located within the North Park (fka Mandeville Farm) property. Specifically, the proposed development is located on
Tract 3-B.
The attached site plan shows the proposed improvements. There are standard water, sewer, storm, and private utilities proposed
underground.
Please provide any required design guidelines and let us know if you would like to schedule a call to discuss this project. Thanks.
Chris Naumann
Associate Principal | Bozeman Branch Manager
(he/him)
t: 406-922-4311
m: 406-570-5758
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