---
title: 2628 — Vaughan Civil — Mason Park BESS — AI Context
type: per-job-claude-md
created: 2026-05-04
created_by: cowork-lfcs (lfcs-project-init v3 run)
job_no: 2628
client: Vaughan Civil
end_client: Mason Park STS (TransGrid)
site: Mason Park STSS, Homebush NSW
job_type: substation-civil-frp
---

# 2628 — Mason Park BESS · Per-job AI context (load-bearing)

## Job snapshot

| Field | Value |
|---|---|
| Job Number | 2628 |
| Client (Head Contractor) | Vaughan Civil |
| End Client | Mason Park STS (TransGrid) |
| Site | Mason Park STSS, Homebush NSW |
| Reference | CCSP-00455 / NC-00996 / TW7310 |
| Status | Bidding (V1 issued 2026-04-19, v-CW-rev1 issued 2026-05-04) |
| Bid Due | TBC — Vaughan asked for return Wed 15 Apr (already passed) |
| Active Bid (Airtable) | TBD — to be created on next sync |
| Job (Airtable) | TBD — to be upserted via lfcs-airtable-sync |
| Vault path | `Operations/Jobs/Upcoming/2628 - Vaughan Civil - Mason Park BESS/` |
| Scope (1-line) | FRP (form/reo/pour) install-only for BESS HV Annex civil works — pits, bund slabs, walls (incl 5.9m tall CW1+CW2), footings, roadway, kerbs, retaining walls |

## Folder map

| Section | Use | Key files |
|---|---|---|
| 01a Head Contract | Vaughan head contract — TBD post-award | — |
| 01c Subcontract Agreements | Master Service Agreements (Major + Minor) | VC-MAJ-CT-XXX + VC-MIN-CT-0xx PDFs |
| 02a Quotes & Estimates | Client-facing quote outputs | LFCS-Quote-V1-Liam-2026-04-19.pdf · 2628-Tender-Summary-2026-05-04_v-CW-rev1.xlsx |
| 02b BOQ & Rate Schedules | BoQ source + LFCS pricing | FRP-BoQ-Husse-priced-2026-04-19.xlsx · FRP-BoQ-LFCS-priced-2026-05-04_v-CW-rev1.xlsx · 2628-Rate-Buildup-2026-05-04_v-CW-rev1.xlsx |
| 03a Issued for Construction | All IFC drawings + specs + RFQ | TW7310 IFC Civil + STD DWGs + 8 standard drawings + Earthing + AusGrid Vibration spec + Asbestos Register + SER |
| 06a Emails | Transmittal | NC-00965 Transmittal |
| 06b RFIs | RFI register (TBD) | _REGISTER.md when first RFI raised |

**Live registers go to source.** Register MD files (`06b/_REGISTER.md`, `08/_REGISTER.md`, `11a/_REGISTER.md`) are the single source of truth — Airtable mirrors them but the MD wins on conflict.

## Patterns — applicable concept notes (cross-cutting)

- `[[lfcs-standards/concepts/Defensible-for-variations-posture]]` — pricing strategy. **Active call:** Cowork v-CW-rev1 represents the *competitive* end of the spectrum (37% under V1); Husse-priced V1 represents the *defensible* end. Rocky picks the submission posture.
- *(no TfNSW pattern note applies here — this is utility/Ausgrid civil, not TfNSW)*

## Scope routing for skills

| Skill | Applies? | Notes |
|---|---|---|
| lfcs-job-scaffold | ✓ run | v4 — folder + brief + CLAUDE.md generated |
| lfcs-drawing-extract-text | ⚠ pending | Run against `03a/TW7310-Mason-Park-Annex-Civil-IFC-drawings.pdf` + STD DWGs — Drawing-Index.md placeholder created |
| lfcs-drawing-extract-vision | ⚠ pending | Phase 0 vision-pass mandatory before final submission |
| lfcs-spec-summarise | ⚠ pending | AusGrid Vibration spec + Asbestos Register + SER candidates |
| lfcs-boq-parse | ✓ done (manual) | Husse BoQ parsed; Cowork priced BoQ generated |
| lfcs-bid-prep-doc | ✓ done | `00-Bid-Prep.md` written |
| lfcs-precall-questions | ✓ done | `06c/Pre-Call-Questions-2026-05-04.md` written |
| lfcs-incl-excl-draft | ✓ done | Block A + Block B baked into Tender Summary xlsx |
| lfcs-airtable-sync | ⚠ pending | Job + Bid + Bid Line Items + Specifications rows to upsert next session |

## Job-specific notes / risks / open items

1. **CW1+CW2 plant burn rate** is the dominant cost driver and the dominant uncertainty. 6-week Manitou+EWP×2+Scaffold+Acrow allowance = ~$72K (10% mu in). Each extra week ≈ $13.7K variation.
2. **TX Bund stepped pour** — 93.35 m³ at depth 150–750mm. If single pour vs stepped, productivity differs significantly. Confirm with Vaughan.
3. **AusGrid Vibration Limits Spec** applies — excluded from LFCS; Vaughan owns monitoring.
4. **Asbestos Register + Audit Report** — Vaughan manages; LFCS stop-work clause if encountered. Asbestos & Lead Audit dated 2022-12-08.
5. **Site Establishment Report (SER) V1.1** signed 2026-XX — reviewed for site context.
6. **Stairs around retaining wall (×4)** NOT IN BoQ — flagged in V1 exclusions item 31. Confirm if added later.
7. **Stormwater pit locations** TBC after BESS road layout finalised — variation flag in submission.

## Common Rocky-queries — quick handlers

- *"What's our number on Mason Park?"* → V1 Liam $857K ex GST · v-CW-rev1 Cowork $541,862 ex GST → see Tender Summary xlsx
- *"What's the gap to Husse?"* → $315,180 lower (37%); see Rate Buildup Sheet 3 (Summary)
- *"Why are CW1/CW2 so dear?"* → 5.9m tall walls + 6-wk Acrow AW8 + EWP×2 + Scaffold + Manitou plant burn = ~$265K combined (50% of total)
- *"What productivity assumption?"* → 160 m²/day slabs (Liam V1 basis) · 12-15 m²/d tall walls · 200-240 m²/d roadway
- *"What's excluded?"* → 33 Block A items (Vaughan supply scope) + 23 Block B items (LFCS defensive) — see Tender Summary Sheet 4

## Source files in vault

See `00-brief.md` Source files table.

## Pricing-checklist compliance status

- ✓ Phase 1 source intake — RFQ + BoQ + drawings + specs in vault
- ⚠ Phase 0 Pre-Pricing-Grill — answered from V1 quote inferences (see `02b/Pre-Pricing-Grill-2026-05-04.md`); Rocky to confirm
- ✓ Phase 2 programme + payment — day shift Mon–Fri 7am-3:30pm, Lump Sum + SoR
- ✓ Phase 3 scope reconciliation — FRP-INSTALL-ONLY confirmed (Vaughan supplies all permanent materials)
- ✓ Phase 4 quantities + dimensions — captured in BoQ + Tender Summary Dimensions sheet
- ✓ Phase 5 output structure — 6-sheet Tender Summary + 5-sheet Rate Buildup
- ✓ Phase 6 commercial discipline — 15% redundancy + 10% materials markup + Calc Basis col on every line
- ⚠ Phase 7 distribution — pending Drive upload + Airtable seeding (next session)
- ⚠ Phase 8 post-submission — pending submission decision (Rocky)