Attachment G-SOW_JacksonLakeWaterTankCleaning.pdf

US Department of Agriculture (USDA)

Statement of Work

Contents Project General Information

1.0 Scope of Work

2.0 Background

Contractor Requirements

3.0 Technical Requirements / Tasks

4.0 Deliverables / Schedule

5.0 Travel

6.0 Contractor’s Key Personnel

Photos

Project Big Pines and Jackson Lake Water Tank Cleaning

General Information

1.0 Scope of Work

Work will reestablish the long-term serviceability of a water storage tank that serves a water system with multiple organizational camp users. Contractor is submitting for a project that includes cleaning a water tank, performing minor repairs, handling of materials and waste, disinfecting each location before returning to service, and documenting the inspection of the tank with a report of images. The partially buried cylindrical concrete tank will be inspected so major repairs can be planned as future contracting work. Contractor shall provide all materials, labor, and equipment necessary for the cleaning and minor repairs.

2.0 Background

The Jackson Lake water systems is in the Wrightwood area. The Jackson Lake system serves multiple organizational camps along Big Pines Highway. There is one cylindrical concrete storage tank (34.390481, -117.725605). Estimated dimensions are 30’ W x 10’ H.

Contractor Requirements

3.0 Technical Requirements / Tasks

As a minimum, the contractor will comply with all Federal, State, and local laws and regulations. Contractor is responsible to adhere to all Federal and State of California safety and environmental laws applicable to this work.

The contractor will be held directly responsible for any violations of these laws and resulting fines. All work on tanks shall meet AWWA standards.

Contractor shall assume all tanks are reachable by four-wheel drive vehicle. No power will be available on site for contractor use at any location.

Contractor shall coordinate with the Forest Service to have water source turned off and water levels low enough to allow safe access and for the water supply to return in a timely manner once work is complete. Contractor will notify Forest Service one week prior to mobilization at any tank/reservoir location to approve start of work. Forest Service will manage the drawdown of the tank and grant approval for the date or request alternate date.

Contractor shall pump remaining water from the tank, remove sand and debris from inside the tank, and rinse the interior. Contractor shall expect to clean a sediment depth of two inches. Sediment depth is calculated as an average sediment depth across the tank/reservoir floor. Sediment removal is considered complete only when an unobstructed view of the tank bottom is achieved. The contractor will provide sufficient photo or video evidence to demonstrate compliance. The discharge water shall be directed in the general direction of overflow drainage or into the overflow catch basin if available. Contractor shall monitor discharge flow rates in outfall structure. At no time shall the discharge flow rate be so great as to cause soil erosion to occur at or around the outfall of the discharge pipe.

Contractor shall patch any minor cracks to the Jackson Lake concrete tank. This shall include concrete patching the top of the tank and any cracks found within.

Contractor will inspect the interior and exterior infrastructure and document any major defects or necessary repairs that cannot be addressed so the Forest Service can plan for future work. Such major defects might include compromised surface integrity and needed recoating, major leaks and cracks, replacement of access hatches or valves, and replacement of ladders or level indicators.

Upon completing all work, the contractor shall end with disinfecting all interior surfaces in accordance with AWWA C652. Contractor shall coordinate with the Forest Service so tank can be returned to service in a timely manner.

Contractor shall provide a draft and final inspection report for each tank/reservoir with the intent the Forest Service can use the documents to contract future repair. Contractor shall send draft reports by fifteen days of all work completed and sites demobilized. Contractor shall send final reports with any requested edits from FS personnel within fifteen days of receiving comments. Reports shall include photos to document the general condition of the infrastructure with problem areas highlighted with further photos and descriptions. Reports shall give a summary of tank recommendations to take over the next 5 years.

4.0 Deliverables / Schedule

Contractor will need to coordinate with the FS for work to begin so interruption of water service can be effectively managed. Contractor should notify the FS seven days before mobilization is to take place so the FS can approve the work at a specific tank/reservoir to begin or propose a more suitable date.

Contractor will submit a draft inspection report for the tank for the FS review. The FS will review and request any edits for the final report submitted.

Item No. Deliverable Objective Due 1 Notification of

Mobilization at Each Tank/Reservoir

Contractor will need to notify the FS one week before mobilizing at tank so FS can effectively manage and drain the water to allow contractor access. FS will need to grant approval of mobilization date.

Via email seven (7) days before mobilization is to occur.

2 Draft Inspection Report for Each Tank/Reservoir

Contractor will submit draft report after completion of work.

Electronic files send via email fifteen (15) days after all work is complete and all sites demobilized.

3 Final Inspection Report for Each Tank/Reservoir

Contractor will submit final report after FS review and comments.

Electronic files send via email fifteen (15) days after FS comments sent.

5.0 Travel

Contractor shall assume that all water tank/reservoir location are accessible by a four-wheel-drive vehicle pulling a trailer.

FS will issue contractor keys to access the locations. While all locations are on FS land, the FS will assist in coordination of access to the Jackson Lake tank as it requires passage through a permitted organizational camp.

6.0 Contractor’s Key Personnel

Contractor is responsible to have those working inside the tank properly certified for confined space entry. Contractor will have all necessary safety equipment associated with confined space entry.

Photos Photos for the location follow.

Figure 1 Exterior of Jackson Lake Tank.

Figure 2 Roof of Jackson Lake Tank.

Figure 3 Spalling area A of Jackson Lake Tank.

Figure 4 Spalling area B of Jackson Lake Tank.

Photos