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    Complaint

    95510
    WPC
    9/28/2020
    Voice Mail
    Sewage Bypass / Overflow
    20-NOV-2023 12:22PM

    Location based on SITE_ID

    Site ID
    9417
    Site
    BAE SYSTEMS Ordnance Systems Inc. Holston Army Ammunition Plant (HSAAP)
    Location
    4509 W Stone Drive
    City
    KINGSPORT
    Description
    Holston Army Ammunition Plant
    County
    Hawkins
    EFO Name
    Johnson City
    Site Owner
    BAE Systems, Ordnance Systems, Inc.

    Investigation Results

    Issue Resolved
    9/28/2020
    BAE Systems Ordnance Systems Inc.
    10/2/2020

    Complaint Description and Writeup

    Billy Shelton (BAE Systems/HSAAP) left voicemail for BBC on 9/28/2020 to report a suspected bypass of the IMP 025A UV disinfection system on 9/25/2020. Additional detail received during a discussion with Mr. Shelton on 9/30/2020 revealed that a downstream valve on the UV system remained closed for indeterminate reasons, resulting in overflow of the UV system dosing station to the sanitary WWTP first chlorine contact chamber and ultimately to outfall 025. The closed valve prevented sewage from passing through the UV system and on to the industrial wastewater treatment facility as designed. Some primary settling may have occurred in the chlorine contact chambers, and the wastewater was disinfected. However, no bypass flow biological treatment occurred. The investigation of the incident was still underway, and additional detail will be provided in a written report.