FORENSIC AUDIT & REBUTTAL: THE "LASER-FOCUS"

FREQUENCY HAZARD

To: WorkSafeBC Claims Adjudication (Claim #42647461)

From: Mark Holand (Control Operator Trainee / Safety Professional)

Subject: Evidence of Improper Configuration, Regulatory Fraud, and Mechanical
Resonance Injury

|. THE PHYSICS OF INJURY: THE "LASER" ANALOGY

The Arcose report’s reliance on A-weighted (dBA) measurements is a fundamental
misapplication of science for this specific hazard.

The 328Hz Beam: The OMC1 server installation produces an acoustic "Laser" at a
dominant 328Hz harmonic. As shown in Exhibit E (Spectral Analysis), this localized
standing wave at Workstation 3 is mathematically "filtered out" by the dBA/dBC broad
averages reported by the employer.

Il. METHODOLOGICAL NEGLIGENCE: THE TSI SOUNDPRO DL-1

The Arcose consultant utilized a TSI SoundPro DL-1 (See Exhibit F: Equipment
Specifications).

Suppressed Capabilities: This Class 1 meter is capable of 1/3 Octave Real-Time
Analysis and Speech Interference Level (SIL) testing. The consultant had the tools
to identify the 328Hz spike but chose to suppress the spectral data. This omission
represents a deliberate attempt to hide a "Tonal Penalty" hazard in a high-cognition
learning environment.

EVIDENCE OF IMPROPER CONFIGURATION & SYMMETRY
FAILURE

The Arcose survey is an incomplete data set that fails to account for the physical reality of
the workstation.

Improper Assembly: My photos from January 29 (Exhibits A & B) and the Arcose
audit photos (Exhibit C) confirm the equipment was operated with side panels
removed. This bypasses the engineered acoustic housing, fundamentally changing
the resonant frequency.

Failure to Test Pressure Gradients: The consultant performed a standard
single-point measurement. However, they failed to conduct a multi-angle "Binaural
Simulation" test.

The Window Effect: My own multi-angle testing (Exhibit D) confirmed a significant
Standing Wave reflecting off the glass window. Because Arcose did not test the
specific pressure differential between the left and right ear positions, they failed to