---
title: 2628 — Vaughan Civil — Mason Park BESS HV Annex Civil Works (FRP)
created: 2026-05-04
type: job-brief
job_no: 2628
client: Vaughan Civil
end_client: Mason Park STS / TransGrid
site: Mason Park STSS, Homebush, NSW
references: CCSP-00455 / NC-00996 / TW7310
status: bidding
bid_due: TBC (Vaughan asked for quote return Wed 15 Apr — already passed; Liam V1 issued 19 Apr; v-CW-rev1 issued 4 May for A/B)
---

# 2628 — Vaughan Civil — Mason Park BESS

## Snapshot

- **Job Number:** 2628
- **Client (Head Contractor):** Vaughan Civil
- **End Client:** Mason Park STS (TransGrid network)
- **Site:** Mason Park STSS, Homebush, NSW
- **References:** CCSP-00455 BESS Grid Mason Park Civil Works · NC-00996 · TW7310
- **Scope:** FRP (Form / Reo Place / Pour) — INSTALL ONLY for the BESS HV Annex civil works
- **Hours:** Day shift only Mon–Fri 7:00am – 3:30pm
- **Pricing Basis:** Lump Sum (preferred), Schedule of Rates also supplied
- **Programme estimate:** ≈13 weeks (driven by CW1+CW2 6-week tall-wall window)

## Scope summary (LFCS lane)

LFCS supplies labour + plant + small consumables for the FRP package only. Vaughan supplies all permanent materials.

**LFCS in scope:**
- Formwork erection + strip
- Reinforcement placement + tying
- Concrete placement + finish (steel float to slabs, no powerfloat)
- Curing compound application
- Connolly Joints — install only
- Plant hire (CW1+CW2): Manitou + 2× EWP + Scaffold + Acrow AW8 wall system × 6 weeks
- LFCS Site Supervisor coordination + sub-PQP

**Vaughan supplies (excluded from LFCS):**
- Concrete, blinding, sand/crusher dust, all reo, all embedded earthing, all pipework + conduits, hold-down bolts, oil containment, precast items, fixtures (grates/frames/pit fixtures)
- Concrete pump, traffic control, exclusion zones, excavation, sub-base prep, survey/setting out, site amenities, skip/disposal, dewatering, AusGrid vibration monitoring, asbestos handling
- Geotechnical, ITPs, as-builts, engineering certs

## Quantities — at a glance (from BoQ)

| Element | Qty | Notes |
|---|---|---|
| Cable pits (600×600×600) | 4 | Per drwg 272731 |
| Bund slabs | 3 (AUX ETXa, AUX ETXb, TX Bund) | TX Bund 93.35 m³ stepped pour, depth varies 150-750mm |
| Reinforced concrete sumps | 4 (S1+S2 = 900×900×750; S3+S4 = 450×450×300) | |
| Transformer Bay walls — low (BW1-BW8) | 8 walls · ≈7.3 m³ total | Heights 0.45-0.55m |
| Transformer Bay walls — TALL (CW1, CW2) | 2 walls · 53 m³ total | 17.9m × 0.25 × **5.9m HIGH** — needs Acrow AW8 + scaffold + EWP + Manitou (6 wk) |
| Edge Beam EB1 | 20 lin m × 0.3 × 0.3 | |
| Plinths | 2 (A5, A6) | |
| Turrets | 3 (TT5, TT6, T9) | |
| Switchyard footings | 8 footings + 1 cable pit | Per drwg 272726/272738 |
| Concrete roadway | ≈1,443 m² @ 200mm | Stated total vol 289 m³ — drwg 272731 |
| Kerb | 252 lin m K1 + 36 lin m TX = 288 lin m | |
| Retaining Walls | 76 lin m total · 7 sections · 0.3 thick × variable height 0.4-0.8m | Drwg 272737 |

**Total concrete volume (LFCS scope):** ≈600 m³ across all elements (Vaughan-supplied).

## Pricing — current state

| Version | Date | By | Total ex GST | Total inc GST | Notes |
|---|---|---|---:|---:|---|
| V1 | 2026-04-19 | Liam (Husse-priced template) | $857,041.60 | $942,745.76 | 7-page PDF · 42 exclusions · 160 m²/day productivity basis |
| **v-CW-rev1** | **2026-05-04** | **Cowork (independent A/B)** | **$541,861.76** | **$596,047.94 → $596,050 rounded** | First-principles rates · Rate Card V1.7 day shift · 15% redundancy · NOT anchored on Husse |

**Cowork is $315,179.84 LOWER than V1 (37% under).**

Rocky's call: which version (or hybrid) to submit. Defensible-for-variations posture (Husse) vs competitive-for-award (Cowork) — see `Defensible-for-variations-posture.md` concept note.

## Key risks / open items

- **CW1+CW2 plant burn rate** — 6-week allowance for Manitou + EWP×2 + Scaffold + Acrow AW8 = ~$72K. If CW1+CW2 takes longer, +$13.7K/wk variation.
- **TX Bund stepped pour complexity** — 16.3 × 10.6 × varies 150-750mm = 93.35 m³. If broken into 4 lifts vs 1, adds ~$8.5K labour.
- **AusGrid Vibration Limits** spec — applies. Excluded from LFCS scope; Vaughan to manage monitoring.
- **Asbestos Register + TS.TW07310 Audit Report** — managed by Vaughan; LFCS stop-work clause if encountered.
- **Quantity growth** if final BESS road layout shifts stormwater pit locations — variation flag in submission.
- **4× stairs around retaining wall** — NOT in BoQ — flagged in V1 exclusions item 31.

## Source files in vault

| Folder | File | Purpose |
|---|---|---|
| 02a | `LFCS-Quote-V1-Liam-2026-04-19.pdf` | Liam's V1 quote (Husse-priced) |
| 02a | `2628-Tender-Summary-2026-05-04_v-CW-rev1.xlsx` | Cowork v-CW-rev1 — 6-sheet client-facing |
| 02b | `FRP-BoQ-Husse-priced-2026-04-19.xlsx` | Husse-priced BoQ (reference) |
| 02b | `FRP-BoQ-LFCS-priced-2026-05-04_v-CW-rev1.xlsx` | Cowork v-CW-rev1 priced BoQ (matches Husse format for A/B) |
| 02b | `2628-Rate-Buildup-2026-05-04_v-CW-rev1.xlsx` | Cowork v-CW-rev1 — 5-sheet internal QS |
| 02b | `FRP-BoQ-blank.xlsx` | Blank BoQ template from Vaughan |
| 02b | `FRP-BoQ-labor-only-Husse-rev2.xlsx` + `FRP-BoQ-labor-rates-Husse-rev3.xlsx` | Husse alt-priced versions |
| 03a | `RFQ-Document.pdf` | Vaughan RFQ |
| 03a | `TW7310-Mason-Park-Annex-Civil-IFC-drawings.pdf` | IFC civil drawing pack |
| 03a | `TW7310-IFC-Civil-STD-drawings.pdf` | Standard drawings index |
| 03a | `STD-*.pdf` (8 standard drawings + earthing) | AusGrid standard drawings |
| 03a | `SPEC-Ausgrid-Vibration-Construction-Limits.pdf` | Vibration limits spec |
| 03a | `SPEC-Mason-Park-Asbestos-Register.pdf` + `SPEC-Asbestos-and-Lead-Audit-Report-2022-12-08.pdf` | Asbestos handling (Vaughan-managed) |
| 03a | `SPEC-Site-Hazard-and-Risk-Profile.pdf` | Site hazard profile |
| 03a | `SER-V1.1-signed-19485-Mason-Park-STSS-BESS.pdf` | Site Establishment Report |
| 01c | `VC-MAJ-CT-XXX-Subcontractor-Master-Service-Agreement.pdf` | To be executed pre-commencement |
| 06a | `Transmittal-2026-Civil-Building-TS7311-Mason-Park-Annex-BESS-NC00965.pdf` | Vaughan transmittal |

## Submitting contact

Liam Fitzgerald · liam.fitzgerald@lfcs.com.au · 0404 996 250