Executive brief
HB 669 opens with the claim thesis: quality loss is a function of time and temperature abuse; abuse is additive across loading, transit, and unloading — even short events can matter by the time product reaches destination. AH-66 supplies the scientific ranges that define what “abuse” means per commodity. PACA good arrival tolerances address condition/defect percentages at receiving — a different but intersecting lens.
Build the evidence stack
- Commodity identity & grade/PO requirements
- USDA storage/transit bands — Cold Chain Index, Produce Shipper Transit Guide
- Pulp temps at origin and destination (probe method, depth, location)
- Reefer download — setpoint, return air, door events, power-off gaps
- Load design — mix legality, airflow, multi-temp seals
- Time stamps — harvest/precool/load/seal/transit/appointment/unload
- Inspection — USDA/private survey; photos with scale and labels
- PACA tolerance math when defects are the battleground — PACA Good Arrival Calculator
Common failure modes (map to papers)
- Field heat at loading → WP01 precool
- Stable but illegal cold for tropicals → WP02 chilling
- Legal temp, illegal mix → WP03/04 ethylene & groups
- Good setpoint, dead airflow → WP05
- Odor taint with clean temps → WP07
Interactive excursion framing: Perishable Claim Analyzer. Interactive defect tolerance framing: PACA Good Arrival Calculator.
Legal floor vs produce physics (eCFR)
USDA handbooks and the tools above answer: was the product handled inside a defensible temperature / mix band? Federal regulations answer a different set of process questions.
| Layer | What it is | Public entry point |
|---|---|---|
| Physics & commodity bands | Storage/transit temps, precool, airflow, ethylene, groups | AH-66 · HB 669 · this library |
| Produce dealer rules (PACA) | Licensing and trade practice framework for produce dealers; good delivery standard for certain commodities | 7 CFR Part 46 · § 46.44 · PACA Good Arrival Calculator |
| Motor carrier claim process | How loss/damage claims are filed, investigated, and disposed of under FMCSA claim rules | 49 CFR Part 370 · esp. § 370.3 (filing) · § 370.9 (disposition timing themes) |
Claim package — process checklist (educational)
Use the interactive Freight claim package checklist built from Part 370 themes. Pair with the deadline calculator for Carmack/minimum period framing. Always confirm contracts, tariffs, and current eCFR.
Shipper vs broker posture
Shipper
- Release only with pulp records and photos.
- Write mix prohibitions explicitly.
- Preserve reefer downloads immediately when issues arise.
Broker
- Do not accept “it’s bad” without timeline reconstruction.
- Separate temperature abuse from transit delay from poor precool from bad mix.
- Keep communications factual; tools cite public USDA ranges and eCFR entry points — still not legal advice.
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FAQ
Is this official USDA guidance?
No. These are educational modernizations of public USDA handbooks (AH-66 and HB 669) by ProspectSentinel / Sentinel Labs. Always consult the primary sources and your contracts.
Can I share these with customers?
Yes — that is the point. Share the HTML or PDF. Do not present them as legal or claims determinations.
Where are the interactive tools?
Sources & interactive tools
- USDA AH-66 — The Commercial Storage of Fruits, Vegetables, and Florist and Nursery Stocks (2016)
- USDA AMS HB 669 — Protecting Perishable Foods During Transport by Truck
- Federal rules (eCFR): 7 CFR Part 46 — PACA regulations · 49 CFR Part 370 — Principles and practices for the investigation and voluntary disposition of loss and damage claims
- Cold Chain Index — 200+ commodity storage/transit matrix + co-load checker
- Produce Shipper Transit Guide — dock setpoints, mix load, checklist
- Reefer Precool Time Estimator — half-cooling-time style estimator
- Perishable Claim Analyzer · PACA Good Arrival Calculator · Produce Truck Rate Explorer
- Freight claim package checklist · Claim / Carmack deadline calculator
Important notice
This publication modernizes and explains public USDA guidance and, where noted, points to public federal regulations on eCFR.gov for educational use by shippers, brokers, carriers, and operators. It is not an official USDA or DOT document, and it is not legal, insurance, PACA advocacy, food-safety certification, or professional claims advice. Always verify current commodity specifications, contracts, and the current eCFR text with the controlling authority and your counsel.
Primary sources: USDA-ARS Agriculture Handbook 66 (2016); USDA-AMS Handbook 669, Protecting Perishable Foods During Transport by Truck (1995, reprinted 2008), including Load Compatibility Groups from USDA Marketing Research Report 1070 (Lipton & Harvey, 1977). Selected federal regulation entry points: 7 CFR Part 46 (PACA); 49 CFR Part 370 (freight claims).
Full series
- 00 Cold Chain Operating System
- 01 The Reefer Is Not a Precooler
- 02 Colder Is Not Safer
- 03 Ethylene: The Invisible Load Killer
- 04 USDA Groups 1–8: The Mixed-Load Playbook
- 05 Airflow, Load Patterns & Multi-Temp Zones
- 06 Commodity Setpoint Desk Guide
- 07 Protein, Dairy & Eggs on the Same Trailer
- 08 CA, MAP & When Gas Matters
- 10 Seasonal Produce Desk
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Free to read, print, and forward. No account required. Bookmark the interactive tools or download the PDF for dock and desk use. Published by ProspectSentinel as an educational modernization of public USDA handbooks.
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