DSHW-2023-212839 - 0901a068812d3f8c

Deq submit <[e-mail]>
Northrop Grumman Bacchus SWMU SS-5 Page 18 Correction
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Jimenez, Timothy A [US] (CO) <[e-mail]>Fri, Dec 15, 2023 at 8:44 AM
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Cc: Dale Urban <[e-mail]>, "Blauer, Kris H [US] (SP)" <[e-mail]>
Attached is a corrected page 18, Section 6.0 Conclusion, for the Northrop Grumman Systems Corporation Bacchus Plant SWMU SS-5
RFI Report.
TIM JIMENEZ, P.E. | Senior Principal Environmental Engineer
Northrop Grumman Corporation | Corporate Remediation
O: 801-251-2142 | C: 801-560-8061 | [e-mail]
SS-5 RFI Report Dec 2023 Page 18 Corrections.pdf
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DSHW-2023-212839
RCRA Facility Investigation Report
SWMU SS-5

Page | 18 Revised December 2023

6.0 SUMMARY AND RECOMMENDATIONS
Based on the information generated from the screening criteria, COPCs present at
SWMU SS-5 does present a risk to the human population or environment through ingestion,
inhalation, dermal contact, or migration to groundwater before impacted soils are removed, as
described in this report. Therefore, the drain-field will be excavated and hauled to a landfill.
Additional confirmation samples will be collected after remediation and a letter will be provided
to the Division petitioning the Division for a letter of “No Further Action” for SWMU SS-5.
However, during the investigation, the extent of contamination was found close to a high-power
pole and associated guywire. Remediation at the site will include excavation of soils at the base
of both of these structures. Therefore, NGSC is petitioning the Division for a “deferral of work
needed” letter allowing SS-5 to remain “as is” until the high-power pole and associated guywire
are no longer in use and can be removed.