Field Service Report · Remediation
FSR-2091-0601 — Soporific-Bloom Over-Emission Remediation
On-site remediation of a GCL-2 "Drowse Lily" cultivar (UF-39022) emitting soporific VOCs above the occupational exposure limit at the Verbena Reach Botanical Garden, a Tier-1 research partner. Emission brought back under OEL; no loss of consciousness; collection stabilized and retained on site under monitoring.
FSR ID: FSR-2091-0601
Date: 2091-03-28
Technician: S. Aralia (lead), J. Sorrel (air-quality)
Crew Size: 2
GCL Grade: GCL-2
Governing SOP: VC-SOP-0501 / 0512
Dispatch Auth: S. Aralia
Engagement classification. Airborne soporific VOC over-emission. The Drowse Lily releases a sedative terpenoid (scopa-class) that induces drowsiness then sleep at sustained exposure above 850 ppb. Powered air-purifying respirators (PAPR) with organic-vapor cartridges are mandatory below the safe threshold per
VC-SOP-0301 §3 (volatile sedatives). No single-person entry into an over-emitting bay.
1. Site & Conditions
| Field | Entry |
|---|
| Site name / client | Verbena Reach Botanical Garden (Tier-1 research partner — joint sedative-compound study) |
| Location / access | Climate-controlled Sedative Flora Pavilion; 11 m × 7 m sealed bay with airlock vestibule. Public access suspended. |
| Engagement type | Remediation |
| Ambient temp / RH | 24 °C / 65 %RH; bay exhaust fan found running at 40% (under-spec) |
| Hazards on arrival | VOC level 1180 ppb at canopy height (OEL 850 ppb); two garden staff reported drowsiness, evacuated before crew arrival, no LOC. |
| Trigger cause | Bloom flush from an unplanned warm-night cycle + a stuck exhaust damper reducing air exchange to ~1.8 ACH (spec ≥ 6 ACH). |
2. Specimen Identification
| Field | Entry |
|---|
| Common name | Drowse Lily (engineered sedative-bloom cultivar) |
| Cultivar / accession | UF-39022 — VC vault stock on loan to partner under study agreement SA-2090-14 |
| Assessed GCL grade | GCL-2 (volatile sedative; reversible CNS depressant; no contact toxin; no aggressive growth) |
| Collection size | 14 plants across a 9 m bed; 6 in synchronized peak bloom driving the over-emission |
| Observed hazards | Scopa-class terpenoid VOC; onset of drowsiness ~8 min at 1180 ppb; reversible on fresh-air recovery |
| Provenance | Confirmed VC loan stock — accession tags intact; PhytoSense swab match |
3. Work Performed
- Held at vestibule; confirmed bay evacuated and accounted for all staff. Established two-person entry with PAPR + organic-vapor cartridges; set rotating 20-min entry limit per crew member.
- Verified PhytoSense VOC handset and a second reference photoionization detector (PID) calibration (cal age 2 d). Captured baseline arrival readings (Section 4).
- Diagnosed root cause: stuck exhaust damper limiting air exchange to ~1.8 ACH. Manually freed the damper and stepped exhaust to 100%, restoring ~7.1 ACH; staged portable carbon-scrubber unit at bed center as redundancy.
- Applied targeted bloom-quiescence: misted the 6 peak-bloom plants with a chilled botanical anti-transpirant to slow terpenoid volatilization without harming the plants (foliar temp held 12–14 °C, non-lethal).
- Deadheaded 11 fully-open blooms into sealed VOC-rated bags to remove the highest-emitting tissue; left buds and foliage intact to preserve the study collection.
- Monitored VOC decay curve with both handset and PID until sustained reading held below 50% OEL for 30 min across three bay positions.
- Re-commissioned the partner's bay environmental controls; set CHLORA remote VOC alerting threshold at 600 ppb (70% OEL) with auto-exhaust boost.
- Field decon of PPE and scrubber; confirmed dosimeter/PID clear; handed bay back to garden staff with a written re-entry clearance.
4. Readings Captured
| Metric | Unit | Nominal Band | Arrival | At Handover |
|---|
| Soporific VOC (canopy height) | ppb | < OEL (850) | 1180 | 310 |
| VOC (breathing zone, 1.5 m) | ppb | < OEL (850) | 940 | 240 |
| Bay air exchange | ACH | ≥ 6 | 1.8 | 7.1 |
| Foliar temp (treated blooms) | °C | quiescence 10–15 | 23.0 | 13.2 |
| Canopy Vitality Index | % | ≥ 90 | 96.0 | 95.3 |
| Aggression Index | idx | < 20 (benign) | 6 | 6 |
| Personnel dosimeter / PID | — | clear | clear | clear |
5. Parts & Consumables
| Item | Part / Lot | Qty | Notes |
|---|
| PAPR unit + OV cartridge pair | PPE-PAPR-2 | 2 | Cartridges spent, replaced |
| Portable carbon scrubber (300 m³/h) | CS-VOC-07 | 1 | Staged as redundancy; returned |
| Chilled anti-transpirant cartridge | AT-CHL-31 | 2 | 1 spare returned |
| VOC-rated disposal bag | VB-LOT-2890 | 4 | Deadheaded blooms |
| Reference PID calibration gas | PID-CAL-isobutylene | 1 | Field span check |
6. Containment Actions
- PPE: PAPR with organic-vapor cartridges, dosimeter; 20-min rotating entry limit (GCL-2 volatile-sedative subset)
- Root cause fixed: stuck exhaust damper freed, air exchange restored 1.8 → 7.1 ACH
- Emission reduced at source: anti-transpirant quiescence + deadheading of peak blooms
- Two-person rule observed: Yes — no single-person over-emitting-bay entry
- Engineering control left in place: CHLORA VOC alert at 600 ppb with auto-exhaust boost
- Decon on egress: PPE and scrubber field-deconned; PID clear; written re-entry clearance issued
7. Outcome & Disposition
| Outcome | Monitored — emission below OEL, collection retained on site under alerting |
| Specimen disposition | Collection not recovered; retained at partner under study agreement SA-2090-14 with active CHLORA VOC monitoring. Deadheaded bloom tissue returned to VC for incineration per VC-SOP-0318. |
| Personnel exposure | Two garden staff experienced transient drowsiness pre-arrival; both evacuated to fresh air, fully recovered, no LOC. No VC crew exposure (PAPR throughout). Incident IR-2091-091 filed (client-side). |
| Site left in condition | Bay re-commissioned with corrected air exchange and VOC alerting; re-entry clearance issued. |
| Emergency procedure triggered? | No — over-emission contained on site; no VC-SOP-0401 escalation. |
| Engagement duration | 2.6 h on-site (within 3.4 h target) |
8. Follow-Up Actions
- Issue partner an environmental-controls advisory requiring ≥ 6 ACH interlock on all sedative-bloom bays — owner: S. Aralia — due 2091-04-02. Done
- Add the Drowse Lily warm-night bloom-flush trigger to the partner's cultivation parameters — owner: Cultivation Liaison — due 2091-04-05. Done
- CHLORA remote VOC trend review at +14 d to confirm stable sub-OEL operation — owner: J. Sorrel — due 2091-04-11. Done, stable
- Audit study agreement SA-2090-14 for emission-control clauses — owner: Legal/Compliance — due 2091-04-12. Open
9. Lessons Learned
Lesson — for volatile sedatives, fix the ventilation before treating the plant. The over-emission was driven less by the bloom flush than by a stuck damper that had quietly halved air exchange for days. Restoring exhaust to 7.1 ACH did more to drop VOC than the bloom quiescence did.
Recommendations: (1) any GCL-2 volatile-sedative loan agreement must include an air-exchange interlock and a remote ACH telemetry feed to CHLORA, not just a VOC sensor; (2) treat low ACH as a leading indicator and alert before the VOC threshold is reached; (3) add an "environmental-controls first" diagnostic step to the volatile-emission remediation path in
VC-SOP-0512. Submitted to Dispatch Lead and Cultivation for SOP revision.
10. Signatures
| Role | Name | Date |
|---|
| Field Technician (Lead) | S. Aralia | 2091-03-28 |
| Air-Quality Technician | J. Sorrel | 2091-03-28 |
| Dispatch Lead | S. Aralia | 2091-03-29 |
| Containment Officer | D. Hemlock | 2091-03-29 |