The Draft Notes: Evidence of Knowledge Figure 4: FOI Release, Page 24 of 34 — WorkSafeBC Internal Advisor Draft Processing Notes. The bold text block explicitly references the BC Ferry data centre and VGH hospital computer processing area benchmarks, with exposure levels of 79 and 72 dBA respectively. This is the unredacted draft. The dates "1991" and "1992" were present in the Advisor's working documents. WCB-2026-0484 Claims Records Page 24 of 34 RCH Jan 25, 2026 Assessment of Chief Complaint: Bilateral Tar Pain stating on Friday - progressively getting worse. Reporting HA, denies neck stiffness. Denies dizziness or blurry vision. penies cp, sob, cough or sore throat, denies jaw pain. Tocaliscd PRMCSMMAMENREN. HMGMEEIIEDs (BORUHEW in/ott for years) but worse today. Loud sounds make ear pain wore. Denies N/V/ll, denies diarrhea or concerns with GI/GU. Denies sick contacts. smed triage notes, pt refere bilat oar pain, loft aright. ear discharge, took Ketorolac with some relief, refused pain meds at thi: Denies dizziness, denies blurry vision, denies ILI symptoms, denies fever or chills at home, Refers intermittent tinnitus, not present now. ..... Friday 30-Jan Hearing Test Amplifon Clinic Surrey 203A-15135 101 Ave - V3R 7Z1 Surrey. Hearing found to be normal. 10db drop in left ear in 8khz range, compared to Sept 2025. Data collected in various work environments with similar noise sources indicate exposures below hazardous levels. WorkSafeBC has noise data from a BC Ferry data center in 1991 and from the central computer processing area of a large hospital in 1992 indicating exposure levels of 79 and 72 dBA, respectively. Data on mechanical switch rooms also indicate exposure levels well below the hazardous criterion (measured at 70 dBA). These measurements take into consideration noise from servers, network equipment, and air conditioning equipment.