Description
This solicitation seeks an annual contract to perform comprehensive maintenance on eight Enhanced Nutrient Removal (ENR) wastewater‑treatment tanks (Tanks 5‑12) owned by Henrico County, Virginia. The work includes tank cleaning, diffuser membrane replacement, aeration‑system flushing, pipe leveling, sewer‑jet cleaning, vacuuming, CCTV inspection of 12‑inch drain piping, and a detailed set of 14 diffused‑aeration‑system piping repairs. Four contractors submitted lump‑sum bids ranging from $1.59 M to $2.94 M; the award is still under review.
• Clean‑out each tank, dispose of removed material, and flush aeration system distributors.
• Replace approximately 1,894 diffuser discs per tank (3,858 for tanks 9‑10) and level associated piping.
• Perform sewer‑jet cleaning, vacuuming, and CCTV inspection of drain pipes (410 ft to 506 ft per tank).
• Execute 14 line‑item diffused‑aeration‑system pipe repairs (end‑caps, joints, supports, etc.) with unit‑price pricing.
• Contract is annual; award pending after compliance verification.