HomeMy WebLinkAboutS1 - Solvent Site Correspondence MGmail Juliene Sinclair<jsinclair@alpinesurveying.net>
FW: [EXTERNAL] Development Project within Bozeman Solvent Site
1 message
dkirsch@alpinesurveying.net<dkirsch@alpinesurveying.net> Mon,Sep 9,2
To:Juliene Sinclair<jsinclair@alpinesurveying.net>
Drew Kirsch, IDE
Alpine Surveying&Engineering,Inc.
714 Stoneridge Drive,Suite 3
Bozeman,MT 59718
406.586.5599 i office
dkimch@alpinesuweying.net
From:Fry,Kate<kfry@mt.gov>
Sent:Friday,August 30,2024 9:55 AM
To:dkirsch@alpinesurveying.net
Cc:ecote@alpinesurveying.net;Christopherson,Sarah<Sarah.Christopherson@mt.gov>;Jim Sullivan<jsullivan@tasman-geo.com>
Subject:RE:[EXTERNAL]Development Project within Bozeman Solvent Site
Hi Drew,
Thank you for reaching out about the Bozeman Solvent Site. Lot 3 of Tract 6 in the Gardner Simmental Plaza Subdivision is within the Bozeman Solvent S
main contaminant of concern for the Bozeman Solvent Site is tetrachloroethene(PCE). The closest Bozeman Solvent Site monitoring wells to the project I
shown on the aerial location map you provided are M-40(deep)/M-41 (shallow). M-40/M-41 are located approximately 500 ft to the east and cross gradie
attached figure. Groundwater flow is from the south to the north.
M-40 is constructed to a depth of 130 feet and M-41 is constructed to a depth of 30 feet. M-40/M-41 were last sampled in 2014 as part of the Bozeman So
In 2014, PCE was not detected(<0.50 pg/L)in M-40 and was detected at 1.8 pg/L in M-41. Depth to groundwater at the time of sampling was 13.09 feet it
11.47 feet in M-41.
In August 2011,the Montana Department of Environmental Quality(DEQ)issued the Record of Decision(ROD)for the Bozeman Solvent Site. The ROD i1
that the Bozeman Solvent Site site-specific clean up level(SSCL)for PCE in groundwater is 5 pg/L.The ROD identified the final cleanup remedy for this pc
Bozeman Solvent Site as monitored natural attenuation(MNA). The PCE concentrations last detected in M-40/M-41 are below the SSCL.
The ROD does not identify construction requirements related to the Bozeman Solvent Site in the area of your project. If construction activities require a de
permit,a Construction Dewatering General Permit(CDGP)may be required by DEQ's Water Protection Bureau. The CDGP application requires the applic
contact me regarding current groundwater plume conditions. This email may satisfy that requirement.Please note,the CDGP may have different requirem
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 is administered by the Montana Departmen
Resources and Conservation.The CGWA limits the type of groundwater wells that can be installed.
Please let me know if you have questions.
Regards,
Kate
Kate Fry I Senior Project Officer
Superfund,AML,and Construction Bureau
Waste Management and Remediation Division
Montana Department of Environmental Quality
Office:406-444-6426
DE Q:E��,',-,r-
n Department of
onmental Quality
of O V O
From:dkirsch@alpinesurveying.net<dkirsch@alpinesurveying.net>
Sent:Tuesday,August 27,2024 11:27 AM
To:Fry,Kate<kfry@mt.gov>
Cc:ecote@alpinesurveying.net
Subject:[EXTERNAL]Development Project within Bozeman Solvent Site
H Kate,
We are working on a development on Lot 3 of Tract 6 in the Gardner Simmental Plaza Subdivision in the City of Bozeman.The project is located in the southwest corner of the intersection of
Ridge Road and Simmental Way(screenshot of location below).The City of Bozeman requires that projects within the solvent site reach out to the DEQ for any specific development requiren
proposed development on the includes a proposed commercial warehouse building and additional parking on lot with an existing building.We have not finalized the locations but stormwater n
will include underground infiltration chambers and retention ponds.Attached is a concept plan of the site.Please let us know if you have a list of additional requirements for proposed develops
the site.Thank you!
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Drew Kirsch, PE
Alpine Surveying&Engineering,Inc.
714 Stoneridge Drive,Suite 3
Bozeman,MT 59718
406.586.5599 1 office
dkimch@alpinesury ying.net
BSS-Well-Distribution.pdf
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