2019-04-24 CC Packet - Laserfiche WebLink

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Centerville,MN-Evaluation 2 KLM Work Plan ROV Inspection KLM plans to utilize a two-man crew and a Remote Operated Vehicle (ROV) to perform the inspection. This inspection method can be performed in one day. KLM will provide NACE Coatings Inspectors, whom are properly trained and qualified to perform this type of inspection. To perform an ROV inspection, the Owner would be required to have the water at or near the high-water level (HWL) at the start of the inspection. KLM inspectors will insert a disinfected ROV into the tank interior, for the interior inspection of the roof, roof structure, and all appurtenances such as vents, manways, and ladders. Photographs will be taken with an underwater camera, which will show the coating deficiencies. The camera will be disinfected in accordance with AWWA. The inlet pipe or wet riser is excluded from the inspection, unless otherwise written into this agreement. Dry Tank Cleanout& Inspection The dry tank inspection is the method recommended by AWWA M 42 D101-53 (R1986)Part A. This method is limited to areas accessible from a ladder or areas that can be reached from the floor. KLM will inspect the floor, reservoir walls, and any interior structure accessible by ladders. All accessible exterior surfaces, including the roof, will also be inspected. KLM will measure and photograph all areas that need to be included in the inspection report. KLM will provide a ladder. The Owner would be responsible for draining the tank prior to inspection. When the tank is empty, KLM will perform a clean-out of the tank interior. KLM will disinfect the tank in accordance with Method 1, 2, or 3 of AWWA C652-11. KLM will require the assistance of the Owner to back-flush and disinfect the reservoir of the tank. KLM will supply the chlorine and do the clean-out of the bottom. Owner's Responsibilities ROV Inspection The Owner's personnel shall be responsible for: ■ Providing copies of background information on tower, including maintenance records, construction drawings,previous inspection reports, and previous painting or reconditioning specifications. It is especially helpful if this information is collected prior to KLM's personnel beginning its inspection. ■ Provide keys for locks and access to the water tower. Dry Tank Cleanout Inspection KLM will require the assistance of the Owner to back-flush the tank. The Owner would need to provide a supply of water to perform the cleanout. A typical clean-out consists of washing down most of the heavy sediment while the water is draining. KLM will disinfect the tank when completed. The Owner's personnel shall be responsible for: ■ Verifying the tower is empty prior to arrival of inspectors. ■ Disposing of sediment removed from the tower. ■ Providing copies of background information on the tower, including maintenance records, construction drawings,previous inspection reports, and previous painting or reconditioning specifications. It is especially helpful if this information is collected prior to KLM's personnel beginning its inspection. ■ Take water samples after the cleanout °If3J& tower has been completed.