FINDING 1: IDLE SYSTEM — NOT REPRESENTATIVE OF INJURY CONDITIONS

The Arcose survey was conducted in an empty room with the system at idle. The Arcose report
states: 'During the noise survey, no training sessions occurred inside the room. The computers
and monitors were operational and idling in the background.’ My injury occurred during active
10-hour training sessions with the system under full computational load. Server fan speeds
increase under thermal load, changing both the volume and frequency profile of acoustic output.
| raised this exact concern in writing on January 23, 2026 — six weeks before the Arcose survey
was conducted. Arcose made the same error | predicted. An idle server and a loaded server are
acoustically different instruments.

FINDING 2: PANEL CONFIGURATION — ENGINEERED CONTROL ABSENT OR
UNCERTIFIED

My photographic evidence from January 29, 2026 (Exhibit A) confirms the server rack was
operating with its side panel removed during the period of my injury. The Arcose audit
photograph (Exhibit C) shows a black panel leaned against the wall on March 6, 2026. Jason
Mayo's voicemail to WorkSafeBC case manager Jaylin Cassady on March 18, 2026 confirms
the room was in the same configuration during testing as when | was there. This creates an
irresolvable Catch-22: if Arcose tested with the panel removed, they measured and certified an
unshielded, disassembled, unpermitted machine operating without its engineered acoustic
housing. If Arcose tested with the panel installed, they did not test the conditions that existed
during my injury. Either scenario invalidates the survey as a clinical assessment of my exposure.
Both scenarios require investigation. Neither was addressed in the report.

FINDING 3: SPEECH INTERFERENCE LEVEL — CAPABILITY EXISTED, TEST NOT RUN

The TSI SoundPro DL-1 (Exhibit F) is capable of Speech Interference Level (SIL) testing. SIL
directly measures whether ambient noise impairs verbal communication. | documented in writing
on January 25, 2026 that | could not reliably hear my instructor or classmates due to server
noise — a textbook Speech Interference Level complaint. This concern was available to the
employer and in the WorkSafeBC file. Arcose had the instrument capability to test it directly.
They did not. A professional noise survey commissioned in response to a documented worker
complaint about inability to hear instruction, using an instrument capable of measuring speech
interference, that does not include a Speech Interference Level test, is methodologically
incomplete.

FINDING 4: THERMAL STATE UNDOCUMENTED — COOLING PROBLEMS KNOWN

The server equipment had documented cooling problems in summer/fall 2025. The side panel
removal may be directly related to these cooling issues — a common field workaround for
inadequate server clearance. The Arcose report does not document the thermal state of the
equipment during testing, whether cooling issues had been resolved, or whether the system
was operating within its designed thermal envelope. A server operating at elevated temperature
runs its fans at higher RPM, producing different acoustic output than a properly cooled sealed
unit. The thermal state of the equipment at the time of testing is undocumented and the survey
cannot be assumed to represent normal operating conditions.