Field Service Report · Emergency Containment
FSR-2090-0533 — Rapid-Growth Strangler Vine Rooftop Breach
Emergency containment of a rapid-growth GCL-3 "Throttle Ivy" strangler cultivar (UF-41260) breaching the Highline Acres rooftop farm. Vine had crossed the farm perimeter onto an adjacent structure within hours. Growth arrested, perimeter restored, specimen recovered; engagement escalated to VC-SOP-0401 per breach criteria.
FSR ID: FSR-2090-0533
Date: 2090-08-21
Technician: D. Hemlock (lead), R. Mallow (handler), T. Vetch (cut team)
Crew Size: 4
GCL Grade: GCL-3
Governing SOP: VC-SOP-0501 / 0204 / 0401
Dispatch Auth: S. Aralia (emergency)
BREACH DECLARED — VC-SOP-0401 escalation. Rapid-growth constrictor crossed a third-party property line: meets breach criteria under
VC-SOP-0401 §2. Throttle Ivy extends ~0.9 m/h under warm humid conditions and exerts thigmotropic constriction on contact. Four-person crew, sealed cut team, and on-call Engineering structural assessor mandatory per
VC-SOP-0204 §5 (GCL-3 rapid-growth subset).
1. Site & Conditions
| Field | Entry |
|---|
| Site name / client | Highline Acres Rooftop Farm (Tier-2 commercial partner — vertical produce co-op) |
| Location / access | 12-story building, 1,400 m² rooftop farm; vine origin at a trellis bed, breach over the south parapet onto a neighboring 10-story facade. Access via two freight lifts. |
| Engagement type | Emergency Containment |
| Ambient temp / RH | 31 °C / 84 %RH (peak growth conditions); intermittent gusts to 28 km/h |
| Hazards on arrival | Principal runner ~14 m, over parapet onto adjacent facade; 30+ laterals into farm beds, irrigation lines, and a structural cable tray. Two co-op staff isolated by overgrowth on a service platform (self-extracted, uninjured). |
| Public / property proximity | Adjacent occupied building; street-level 12 m cordon and rooftop exclusion zone set with building management. |
2. Specimen Identification
| Field | Entry |
|---|
| Common name | Throttle Ivy (engineered rapid-growth constrictor cultivar) |
| Cultivar / accession | UF-41260 — escape from a co-op trial bed seeded with an unverified "fast green wall" cutting |
| Assessed GCL grade | GCL-3 (constriction hazard + rapid spread; no toxin; no aerial dispersal — but prolific node-rooting) |
| Approx. size | ~14 m principal runner, 30+ laterals, est. 60 kg wet mass; 9 node-rooted anchor points on two structures |
| Observed hazards | Growth rate 0.9 m/h; thigmotropic constriction force 410 N on test rod; node-rooting onto masonry and cable tray |
| Provenance | Confirmed — genetic match to vault stock via field PhytoSense swab; cutting source under investigation |
3. Work Performed
- On breach confirmation, declared VC-SOP-0401 at 14:06; notified building management, established street cordon (12 m) and rooftop exclusion zone; confirmed both isolated staff self-extracted and accounted for.
- Crew donned cut-resistant gauntlets, arm guards, eye protection, and dosimeters per VC-SOP-0301 GCL-3 field subset. Engineering structural assessor confirmed the parapet and adjacent facade cable tray were load-safe to work.
- Captured arrival readings (Section 4). Growth-arrest priority: applied chilled-CO₂ quiescence wands to the principal runner crown and the two leading growth tips to halt extension (target tissue temp < 9 °C).
- With leading tips arrested, severed the breach span at the parapet first to remove the third-party-property exposure, sleeving the over-parapet section and lowering it by controlled line to the cut team below.
- Worked laterals distal-to-proximal, releasing node-rooted anchors from masonry and the cable tray with pry tools; coiled each lateral into sealed transport sleeves.
- Excised the principal runner crown with 0.4 m root ball; double-sleeved into a GCL-3 sealed transport pod.
- Full fragment sweep across both structures and the street drop zone; recovered 7 viable fragments > 5 cm. Treated 9 node-root scars on masonry with a root-kill gel to prevent regrowth.
- Field decon of tools and PPE; dosimeters clear; lifted exclusion zone after Engineering re-inspection; breach stand-down logged at 17:41.
4. Readings Captured
| Metric | Unit | Nominal Band | Arrival | At Securing |
|---|
| Growth Rate (leading tip) | m/h | arrest < 0.05 | 0.9 | 0.0 |
| Sap-Flow Rate | g/h | 40–70 (species) | 132 | 11 |
| Turgor Pressure | kPa | 120–180 | 231 | 74 |
| Crown Tissue Temp | °C | handling < 9 | 30.0 | 7.4 |
| Constriction Force (test rod) | N | — | 410 | < 20 |
| Aggression Index | idx | < 30 (GCL-3 cap 60) | 72 | — |
| Perimeter Containment Integrity | % | 100 | 0 (breached) | 100 (restored) |
| VOC / Toxin Index | ppb | < OEL | 0 (non-toxic) | 0 |
5. Parts & Consumables
| Item | Part / Lot | Qty | Notes |
|---|
| GCL-3 sealed transport pod | TP3-0102 | 2 | Principal crown + heavy laterals |
| Sealed transport sleeve | TS-LOT-2257 | 37 | Laterals + fragments |
| Chilled-CO₂ quiescence cartridge | QW-CO2-118 | 5 | 1 spare returned |
| Root-kill gel applicator | RK-GEL-14 | 9 | Node-root scar treatment |
| Controlled-descent lowering line | LL-RIG-3 | 1 | Parapet span lowering |
| Cut-resistant gauntlet pair | PPE-GTL-3 | 4 | Decontaminated, returned |
6. Containment Actions
- PPE: cut-resistant gauntlets, arm guards, eye protection, dosimeters (GCL-3 field subset)
- Growth arrested first: chilled quiescence on crown + both leading tips before any severance
- Third-party exposure removed first: breach span at parapet severed and lowered before farm-side work
- Four-person rule observed: Yes — handler, two cut team, lead; Engineering structural assessor on call
- Node-rooting controlled: 9 anchor scars treated with root-kill gel; full fragment sweep across both structures + drop zone
- Perimeter restored to 100% integrity; Engineering re-inspection before exclusion-zone lift
- VC-SOP-0401 breach declared, logged, and stood down with timestamps
7. Outcome & Disposition
| Outcome | Escalated → SOP-0401 · Contained & Recovered |
| Specimen disposition | Returned to GCL-3 Bio-Vault Sphere S-37; re-cataloged under parent UF-41260; 7 fragments and node-root tissue incinerated per VC-SOP-0318. |
| Personnel exposure | None — no constriction contact; both co-op staff self-extracted before crew arrival, uninjured. |
| Property impact | Minor surface scarring to adjacent facade masonry from node-rooting; cable tray inspected and cleared by Engineering. Property report PR-2090-118 filed. |
| Emergency procedure triggered? | Yes — breach declared 14:06, stand-down 17:41; after-action review required per VC-SOP-0401 §7. |
| Containment duration | 3.6 h from breach declaration to stand-down |
8. Follow-Up Actions
- VC-SOP-0401 after-action review convened — owner: D. Hemlock — due 2090-08-25. Done
- Adjacent-building facade re-inspection at +30 d for node-root regrowth — owner: T. Vetch — due 2090-09-20. Done, clear
- Trace and quarantine the "fast green wall" cutting source — owner: Logistics (D. Hemlock) — due 2090-08-28. Done — unverified third-party vendor
- Issue partner a prohibition notice on unverified cuttings in shared beds — owner: Legal/Compliance — due 2090-08-30. Done
- Engineering settlement on facade masonry repair — owner: Engineering Liaison — due 2090-09-15. Open
9. Lessons Learned
Lesson — for rapid-growth constrictors, arrest the leading tips before touching anything else. The breach progressed because the dispatch initially queued this as a standard recovery; by arrival the vine had already crossed the property line. The decisive action was quiescing both leading growth tips on entry, which dropped the 0.9 m/h extension to zero and stopped the breach from widening during the 3.6 h cut.
Recommendations: (1) any specimen with a measured growth rate > 0.3 m/h auto-classifies as an emergency-containment dispatch, not a recovery, and pre-declares
VC-SOP-0401 readiness; (2) stage a minimum of 5 quiescence cartridges and a structural assessor on all rapid-growth GCL-3 calls; (3) sever the third-party-exposure span first, always. Submitted to Dispatch Lead for SOP-0501/0401 cross-reference revision.
10. Signatures
| Role | Name | Date |
|---|
| Field Technician (Lead) | D. Hemlock | 2090-08-21 |
| Field Handler | R. Mallow | 2090-08-21 |
| Cut Team / Observer | T. Vetch | 2090-08-21 |
| Dispatch Lead | S. Aralia | 2090-08-22 |
| Containment Officer (AAR) | D. Hemlock | 2090-08-25 |