Log 70-O67

Designation: Hydrotest Chamber H-3

Apparent date/time: 2026-10-17 09:14 / 2026-10-16 22:41

Entry method: Noclip through access panel labeled TEST

Environmental Baseline

Lighting: Fluorescent tubes. Color temperature 4100 K by meter. 2800 K by visual estimate. Flicker interval 0.8 s.

Ambient temperature: 18.2 °C at entry. 22.7 °C at geometric center. Humidity 67 % then 41 %.

Background sound: Low-frequency hum. 58 Hz. Arrives 1.4 s after instrument deflection.

Air movement: Absent. Pressure holds at 1013 hPa.

Spatial Observations

Chamber rectangular. Estimated length 12.4 m. Measured length 9.1 m. Width remains 4.2 m. Height 3.1 m at walls. 3.8 m at center. Floor wet concrete. Drains present. Walls stainless steel with rivets. Ceiling carries grid of sprinkler heads. Count 14 on entry. Count 9 on departure. No doors remain visible after entry.

Anomalies

Water level in floor channel independent of inlet valve position. Valve closed. Level rises 2 cm over 40 s. Splash sound arrives 2.1 s after droplet impact observed. Residual droplets on walls decrease in number. No evaporation. No flow. Water temperature 4.2 °C. Air temperature 21 °C. Condensation unchanged. Pressure gauge on manifold reads 0.0 bar. Residual pressure drop of 0.3 bar recorded without valve movement.

Entity Notes

None observed.

Exit / Continuity Status

Exit through original access panel. Duration 18 min. Exit achieved. Residual: instrument log records 14 kPa pressure spike. No corresponding sensor deflection. Continuity intact.