Att_4_RFIs_Maintain_WTP_Cathodic_Anodes_0001.pdf
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- Water Treatment Plant Cathodic Anodes, Lake Mead
- Solicitation number
- 140P8122Q0083
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9/12/2022
RFIs: 140P8122Q0083 Maintain WTP Cathodic Anodes, Lake Mead NRA
1) PAGE 43 of the SOW: Is showing an above ground steel hydromantic tank with an Impressed Current CP system (120v AC required). The systems that are requiring replacement are for Passive CP with magnesium anodes (no power required). Which is correct?
Answer: Echo Bay, Katherine Landing, and Callville Bay clear wells are passive CP.
Callville Bay AST is impressed current CP.
2) Are there as built drawings of the passive CP systems, structures, and pumps?
Answer: There are no as-built drawings.
3) What is being catholically protected? Are these concrete or steel basins?
Answer: Steel basins.
4) How are the anodes supported or are we able to reuse the supports and existing wires?
Answer: Anodes are supported by PVC framed structure. Reuse the supports and existing wires.
5) Will all basins be empty at once or will we have to do return trips?
Answer: All basins will be empty at once but coordination is required.
6) Are these confined space required structures?
Answer: Yes, they are confined space required structures.
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