Noise Catchment Areas
Night-time Rating Background Levels and the derived EPL threshold.
| NCA | Chainage | Receivers | Atten. | RBL | Threshold |
|---|---|---|---|---|---|
| NCA-01 Rouse Hill / Kellyville | 0.0–9.0 km | Residential | −40 | 33 | 48 |
| NCA-02 Norwest / Castle Hill | 9.0–18.0 km | Mixed | −38 | 36 | 51 |
| NCA-03 Cherrybrook / Epping | 18.0–26.0 km | Residential | −42 | 31 | 46 |
| NCA-04 Macquarie Park / North Ryde | 26.0–36.0 km | Commercial | −34 | 40 | 55 |
| NCA-05 Crows Nest / North Sydney | 36.0–41.0 km | Mixed | −36 | 38 | 53 |
| NCA-06 Barangaroo / Martin Place CBD | 41.0–45.0 km | Commercial | −30 | 45 | 60 |
| NCA-07 Waterloo / Sydenham | 45.0–51.5 km | Residential | −38 | 35 | 50 |
| NCA-08 Marrickville / Dulwich Hill | 51.5–57.0 km | Residential | −41 | 32 | 47 |
| NCA-09 Campsie / Belmore | 57.0–61.0 km | Residential | −43 | 30 | 45 |
| NCA-10 Punchbowl / Bankstown | 61.0–65.0 km | Mixed | −39 | 34 | 49 |
Incompatibility matrix
Tag pairs cross-referenced on every stack change. Mobile plant is additionally buffered ±0.25 km against live electrical infrastructure.
Traction power cannot be simultaneously isolated for OHL works and energised for CBTC dynamic testing.
Test train movements are prohibited through a worksite with exposed OHL conductors.
Tamping/grinding vibration invalidates balise alignment and platform screen door calibration.
Ignition sources cannot be stacked with cut vegetation fuel loads in the corridor.
Grinding spark plume presents a corridor fire risk beside cleared vegetation.
On-track plant occupies the running line required for dynamic CBTC test runs.
Geometry change requires re-survey before CBTC validation; sequence these within the window.
Airborne dust degrades optical alignment accuracy.
Two heavy on-track machines in one window contend for the same access point.
Window-by-window acoustic assessment
| Window | Date | NCA | Tasks | LAeq | Threshold | LAmax | Status |
|---|---|---|---|---|---|---|---|
| W01-M1-NW-N1 | Tue, 18 Aug 01:00 | NCA-02 | 1 | 47 | 51 | 58 | COMPLIANT |
| W01-M1-CITY-N2 | Wed, 19 Aug 01:00 | NCA-07 | 1 | 48 | 50 | 56 | COMPLIANT |
| W01-M1-SW-N3 | Thu, 20 Aug 01:00 | NCA-08 | 1 | 34 | 47 | 44 | COMPLIANT |
| W01-M1-NW-N4 | Fri, 21 Aug 01:00 | NCA-03 | 1 | 16 | 46 | 26 | COMPLIANT |
| W02-M1-NW-N1 | Tue, 25 Aug 01:00 | NCA-03 | 1 | 41 | 46 | 50 | COMPLIANT |
| W02-M1-CITY-N2 | Wed, 26 Aug 01:00 | NCA-05 | 1 | 52 | 53 | 58 | COMPLIANT |
| W02-M1-SW-N3 | Thu, 27 Aug 01:00 | NCA-08 | 1 | 19 | 47 | 26 | COMPLIANT |
| W02-M1-CITY-N4 | Fri, 28 Aug 01:00 | NCA-05 | 1 | 52 | 53 | 58 | COMPLIANT |
| W03-M1-NW-N1 | Tue, 01 Sept 01:00 | NCA-02 | 1 | 46 | 51 | 51 | COMPLIANT |
| W03-M1-CITY-N2 | Wed, 02 Sept 01:00 | NCA-06 | 1 | 55 | 60 | 60 | COMPLIANT |
| W03-M1-SW-N3 | Thu, 03 Sept 01:00 | NCA-09 | 1 | 24 | 45 | 37 | COMPLIANT |
| W03-M1-SW-N4 | Fri, 04 Sept 01:00 | NCA-08 | 1 | 43 | 47 | 48 | COMPLIANT |
| W03-M1-CITY-WE | Sat, 05 Sept 23:00 | NCA-07 | 1 | 13 | 50 | 23 | COMPLIANT |
| W04-M1-NW-N1 | Tue, 08 Sept 01:00 | NCA-03 | 1 | 27 | 46 | 36 | COMPLIANT |
| W04-M1-CITY-N2 | Wed, 09 Sept 01:00 | NCA-06 | 1 | 23 | 60 | 35 | COMPLIANT |
| W04-M1-SW-N3 | Thu, 10 Sept 01:00 | NCA-09 | 1 | 44 | 45 | 52 | COMPLIANT |
| W04-M1-NW-N4 | Fri, 11 Sept 01:00 | NCA-03 | 1 | 42 | 46 | 52 | COMPLIANT |
| W05-M1-NW-N1 | Tue, 15 Sept 01:00 | NCA-03 | 2 | 48.8 | 46 | 55 | EPL BREACH |
| W05-M1-CITY-N2 | Wed, 16 Sept 01:00 | NCA-05 | 2 | 19.5 | 53 | 24 | OTHER FAILURE |
| W05-M1-SW-N3 | Thu, 17 Sept 01:00 | NCA-08 | 2 | 47 | 47 | 51 | OTHER FAILURE |
| W06-M1-NW-N1 | Tue, 22 Sept 01:00 | NCA-02 | 2 | 51 | 51 | 57 | OTHER FAILURE |