SOW_Arsenic_Removal_Media.pdf

STATEMENT OF WORK (SOW)

FOR

REMOVAL/REPLACMENT OF ADSORPTIVE MEDIA AT Temple Bar

PART 1 – GENERAL INFORMATION

1.1 Description of Work. This scope of work is for removal, disposal and replacement of 225 cubic feet of adsorptive media contained within two treatment tanks at Temple Bar Water Treatment Plant (WTP). The media removes arsenic from the groundwater used as the water supply for the public water system at Temple Bar, AZ.

1.2 Location of Project. This project is located at the Temple Bar Water Treatment Plant on Lake Mead in the Lake Mead National Recreation Area about 28 miles from the State Road 143 turnoff on Highway #93.

1.3 Period of Performance. Contractor must start work within 30 days from contract award date. Onsite work must be completed within a maximum of 3 consecutive days.

1.4 Responsibility for Work Site. The contractor shall be responsible for all damages to person(s) and property that occur as a result of the contractor’s fault or negligence in connection with the required work and shall hold the government free from all claims arising from such damage.

1.5 Regular Working Hours. Regular working hours at the park are from 0730 to 1700, Monday through Friday, excluding federal holidays. All work shall be performed during normal working hours.

1.6 National Park Service Responsibilities (NPS). NPS will provide Toxicity Characteristic Leaching Potential (TCLP) test results for the purpose of media disposal in a licensed Arizona landfill. The contactor shall prepare and submit the necessary documentation to allow proper disposal. NPS will be responsible for signing the documents as the generator of said waste.

PART 2 – SCOPE OF SERVICES

The contractor shall provide all labor, equipment, material and supervision necessary to perform the following tasks.

1. The contractor shall supply 225 cubic feet of granular ferric oxide arsenic treatment media (Sorb E-33 or equal in specifications).

2. The contractor shall replace all gaskets to the manways that are opened as a result of the media replacement.

3. The Contractor will ensure that no leaks are present after changeout.

4. The contractor shall remove 225 cubic feet of existing Sorb E-33 media from the two treatment vessels at Temple Bar water treatment plant. It shall be removed so as not to disturb the underdrain components within the containment vessel. Any disruption of or incidental removal of underdrain media shall be repaired/restored at the contractor’s expense.

5. The new media shall be placed by hand within the treatment vessel.

6. All “spent” media shall be removed from the site by the contractor for disposal in an Arizona landfill. The contractor will test for any required chemical analysis to properly dispose of the material. The contractor is responsible for preparation and submittal of the documents required by the landfill facility. The contractor is responsible for all disposal costs. In addition, all trash or other waste generated as a result of this project must be disposed of properly by the contractor.

7. The water treatment facility will be taken off line for completion of work outlined in this contract. All media shall be removed from both tanks and the tanks shall be inspected. An inspection report and photographs depicting interior tank condition shall be submitted to the government upon project completion.

8. Upon placement of media, each tank shall be secured and the recommended concentration of chlorine solution shall be added and allowed to remain in the tank for a sufficient amount of time for adequate disinfection. The adequacy of disinfection shall be documented by the analysis of water samples taken upon completion of the disinfection process.

9. The heavily chlorinated water used for disinfection must be treated to remove chlorine before discharge into the sanitary sewer system at the site. The concentration of chlorine discharged into the wastewater system must not have a free chlorine residual over 1 mg/l.

ACCEPTANCE OF WORK. The Utility Systems Manager and/or the Contracting Officer Representative (COR) will approve and accept all work.