The Navy seeks quotes for a firm-fixed-price acquisition to prepare and preserve Potable Water Tank #2 onboard a submarine at Naval Submarine Base New London, with performance from October 30, 2026 to November 30, 2026. Work is non-consecutive and requires 7-day-per-week, two-shift coverage plus on-site response within a 2-hour notification. Offerors must document AMPP C7, C12, C14, CAS Level 2, QP-1 (or NAVSEA-approved equivalents) and at least Level 1/Self CMMC certification in SPRS/PIEE. Quotes must include total and CLIN-level pricing for preparation, preservation, materials, and travel/per diem for two site visits, with detailed labor and travel breakdowns, plus three recent relevant past-performance contracts. Award will be best value to the government, with technical qualification and past performance combined more important than price.