002-Q and A - Replace WWTP Panther Junction_0002.docx

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Upgrade Panther Junction Waste Water Plant
Solicitation number
140P2020R0044
Issued by

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This document contains questions and answers regarding solicitation number 140P2020R0044 to upgrade the wastewater treatment plant in Panther Junction at Big Bend National Park. The National Park Service is seeking to replace the existing rotating biological contactor wastewater treatment system with a new fixed-film design that includes anoxic treatment to reduce total nitrogen levels below 10 mg/L in the discharge effluent. Alternative designs or omitting anoxic treatment will not be considered in order to meet anticipated future permit requirements for at least the next 10 years. Reinforced concrete is required for the treatment tanks rather than fiberglass. RV sites at the park are available for $6.57 per night including utilities.

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Replace Wastewater Plant Panther Junction- BIBE 218341

Q1: Does the WWTP have to be a rotating biological contactor style of attached growth?

A1: YES

Q2: Or, can an alternative TCEQ-approved fixed-film design be proposed that has essentially the same unit operations, just without the need to rotate the media?.

A2: NO

Q3: Can the tank for the system be fiberglass reinforced plastic (FRP) instead of reinforced concrete? It would be better from a corrosion resistance standpoint and can be installed in-ground or above. It could also potentially reduce site development costs.

A3: NO

Q4: Is the TCEQ permit number for this project WQ0012865004?

A4: YES

Q5: If so, why do the specifications for the unit require anoxic treatment and include a TN limit in the design basis?

A5: Anoxic treatment is provided to reduce the discharge effluent total nitrogen content to be below 10 mg/L, the EPA and TX standard for groundwater. Adding the anoxic tank at this time is a long term cost savings measure and should cover most, if not all, anticipated future TCEQ discharge permit changes for the next 10 years.

Q6: If that is the correct permit number, it appears the parameters include only BOD, pH and chlorine disinfection. If this is correct, can the anoxic treatment be omitted to save costs?

A6: NO

Q7: What is the procedure for submitting alternative TCEQ-approved treatment system designs for consideration?

A7: Alternative design to the solicitation is not acceptable.

Q8: Are we allowed to use the campsites?

A8: Yes. The RV sites are $6.57 per day and that includes electric, water, and sewer.

File details come from the government source that posted it. Updated .