Field Service Report · Remediation · Worked Example
FSR-2090-0518 — Conservatory Health Remediation
Routine health remediation of a GCL-1 ornamental collection (42 specimens) at the Marrow Glasshouse Conservatory, a contracted partner site. Mild nutrient chlorosis and an early scale-pest presence; both corrected on-site with a benign outcome.
Engagement classification. Benign GCL-1 remediation under a standing conservatory service contract. Single-technician dispatch permitted (no two-person rule for GCL-1). Standard horticultural PPE only.
1. Site & Conditions
| Field | Entry |
|---|---|
| Site name / client | Marrow Glasshouse Conservatory (Tier-1 service partner, contract VC-LEG-CT-0207) |
| Location / access | Ground-floor public glasshouse; staff access during closed hours 07:00–09:00. |
| Engagement type | Remediation |
| Ambient temp / RH | 23 °C / 64 %RH; glasshouse climate well regulated. |
| Conditions on arrival | Collection visually healthy except for chlorosis in the fern bed and stippling on two camellia specimens. |
| Public proximity | None during service window. |
2. Specimen Identification
| Field | Entry |
|---|---|
| Collection | Ornamental display collection — 42 specimens across 9 genera |
| Accession scope | Client-owned; not Universal Flora stock. No UF- linkage. |
| Assessed GCL grade | GCL-1 (benign; no toxin, predation, or dispersal hazard) |
| Primary issues | (a) interveinal chlorosis — fern bed (6 specimens); (b) early soft-scale infestation — 2 camellias |
| Hazards | None to personnel; standard horticultural handling. |
3. Work Performed
- Walked the full collection with the PhytoSense handset; logged baseline CVI and Fv/Fm per specimen group (Section 4).
- Diagnosed fern-bed chlorosis as iron/magnesium deficiency from elevated substrate pH (measured 7.1 vs 5.8–6.2 nominal).
- Applied corrective acidifying nutrient dose per VC-SOP-0118 dilution table; re-tested substrate pH to 6.3.
- Inspected the two affected camellias; confirmed early soft-scale (low population, no sooty mold yet).
- Applied targeted horticultural-oil treatment to affected camellias; manually removed visible scale clusters; bagged and removed debris.
- Advised conservatory staff on a 14-day re-treatment and humidity adjustment to suppress recurrence.
- Captured departure readings; confirmed CVI uplift already underway in treated camellias (turgor recovery).
4. Readings Captured
| Metric | Unit | Nominal Band | Arrival | Departure |
|---|---|---|---|---|
| CVI — overall collection | % | ≥ 90 | 91.2 | 93.0 |
| CVI — fern bed | % | ≥ 90 | 83.4 | 86.1 |
| CVI — affected camellias | % | ≥ 90 | 79.0 | 84.6 |
| Chlorophyll Fluorescence (Fv/Fm) | ratio | ≥ 0.78 | 0.74 | 0.77 |
| Substrate pH (fern bed) | — | 5.8–6.2 | 7.1 | 6.3 |
| Substrate Moisture | % | 60–70 | 58 | 65 |
| VOC / Toxin Index | ppb | < OEL | 0 | 0 |
Specimens Serviced428 treated
Collection CVI93.0%▲ 1.8 pts on-site
Fern-Bed pH6.3corrected from 7.1
On-Site Time1.4 hroutine band
5. Parts & Consumables
| Item | Part / Lot | Qty | Notes |
|---|---|---|---|
| Acidifying nutrient corrective | HL-NUT-AC-07 | 0.6 L | Per VC-SOP-0118 dilution |
| Horticultural oil (scale) | HORT-OIL-12 | 0.25 L | Camellia spot-treatment |
| Disposal bags (plant debris) | BIO-BAG-1 | 2 | Scale debris, non-hazard |
6. Containment Actions
- PPE: nitrile gloves, eye protection (GCL-1 horticultural standard)
- Containment method: N/A — in-place treatment, no specimen removed
- Two-person rule: N/A (GCL-1)
- Field dispersal control: N/A — no hazardous material
- Decon on egress: standard tool wipe-down
7. Outcome & Disposition
| Outcome | Resolved |
| Specimen disposition | All specimens treated in place and retained by client. No removal. |
| Site left in condition | Collection healthy and improving; debris removed; staff briefed. |
| Emergency procedure triggered? | No. |
8. Follow-Up Actions
- Conservatory staff to complete 14-day horticultural-oil re-treatment on camellias — owner: client — confirm by 2090-06-30.
- Next scheduled service survey — owner: T. Vetch — 2090-09-14 (quarterly contract cadence).
- Log corrected fern-bed pH baseline to client metric record — owner: T. Vetch — Done
9. Lessons Learned
Note. Substrate pH drift was the upstream cause of the chlorosis; the visible symptom was treated and the root cause corrected in the same visit. Recommend the quarterly survey checklist add a mandatory substrate-pH read for any bed showing CVI below 88%, to catch drift before chlorosis presents. Minor; submitted as advisory only.
10. Signatures
| Role | Name | Date |
|---|---|---|
| Field Technician | T. Vetch | 2090-06-14 |
| Dispatch Lead | S. Aralia | 2090-06-15 |
| Client Representative | Curator, Marrow Glasshouse | 2090-06-14 |