Attachment 5: Hazardous Materials Investigation Report South Rim WWTP

Hazardous Materials Investigation Report
Grand Canyon South Rim Wastewater Treatment Plant

Task Order #148045100
CJSeto Project #2910

November 2023

Task Orders: 148045100
11/2023

Hazardous Materials Investigation Report
Grand Canyon South Rim WWTP

Attachments:
Attachment I – Tables I and II: Results Summary Spreadsheets Attachment II – Inspection Photographs
Attachment III – Drawings: Floor Plans with Asbestos Sample Locations Identified Attachment IV – Analytical Laboratory Results

i

Task Orders: 148045100
11/2023

Hazardous Materials Investigation Report
Grand Canyon South Rim WWTP

Introduction:
The National Park Service entered into contract with Jacobs Government Services Company (Jacobs) under Contract 140P2023D0006 in connection with Projects D3167666 NPS GRCA SOUTH RIM WWTP REPL. Jacobs subcontracted the hazardous materials investigation services for the proposed improvements at the South Rim Wastewater Treatment Plant Complex (South Rim WWTP) to CJSeto Support Services, LLC (CJSeto) under Task Order 148045100. The hazardous materials investigation at the Grand Canyon South Rim Wastewater Treatment Plant Complex (South Rim WWTP) was performed on October 16 - 18, 2023. The hazardous materials investigations were performed by CJSeto personnel: •

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Asbestos inspection and sampling; lead-based paint survey and sampling; PCB, and other hazardous materials investigations was performed by Kathryn DeCosta (Indiana Asbestos Inspector License #19A007726, expiration: 10/19/2024; Indiana Lead Inspector License # IND001636, expiration 11/27/2024).
Lead-based paint sampling and survey was assisted by Gene Conway.

The South Rim WWTP is located approximately 0.5-mile south of the intersection of Well Road and West Rim Drive, in Grand Canyon National Park, Coconino County, Arizona and consists of three main buildings: the Operations/Admin Building, Pretreatment Building, and Reclamation Building, including an attached pipe gallery connecting the Operations Building to the Pretreatment Building adjacent to the aeration tanks. Other adjacent structures including concrete sludge drying beds, aeration tanks, flow equalization basins, clarifiers, seven (7) storage sheds, and six (6) Connex-shipping containers were also included in the scope of this investigation. Asbuilt and other historical drawings indicate that the South Rim WWTP facility was constructed in the mid-70s, with renovations and additions in the 1980s. Building materials appeared homogenous throughout all three main buildings.