CHA Advanced Diagnostics & Troubleshooting 3 — Questions and Answers
Question 1: An auditor reviews a HACCP plan for a smoked fish operation and finds no CCP for water phase salt (WPS) control, only a CCP for smoking temperature. What hazard is MOST likely unaddressed?
- Clostridium botulinum growth during extended refrigerated storage (Correct answer)
- Salmonella contamination from raw fish
- Foreign material from smoking equipment
- Allergen cross-contact from shared smokers
Correct answer: Clostridium botulinum growth during extended refrigerated storage
For smoked fish, WPS (water phase salt) is a critical barrier against Clostridium botulinum; without it as a CCP, the anaerobic, low-acid environment of vacuum-packaged smoked fish creates botulism risk.
Question 2: During an audit, records show that a CCP deviation occurred but the lot disposition field on the corrective action form is blank. What is the MOST serious implication?
- The form needs a minor revision
- Potentially unsafe product may have been released without evaluation (Correct answer)
- The corrective action is complete since the deviation was noted
- Blank fields are acceptable if verbal disposition was communicated
Correct answer: Potentially unsafe product may have been released without evaluation
Without documented lot disposition, there is no evidence that affected product was evaluated and either destroyed, reprocessed, or confirmed safe before release.
Question 3: A HACCP plan specifies that internal product temperature must reach 145°F for whole muscle beef. An auditor finds thermometers are inserted into the geometric center of the thickest part but the product consistently passes. However, a customer complaint about undercooked meat prompts a review. What should the auditor investigate FIRST?
- Whether the customer complaint is credible
- Whether thermometer placement captures the coldest point, not just the geometric center (Correct answer)
- Whether the critical limit should be lowered
- Whether finished product microbiological testing is adequate
Correct answer: Whether thermometer placement captures the coldest point, not just the geometric center
The geometric center is not always the coldest point; the auditor should verify that monitoring targets the slowest-heating zone, which may differ based on product shape and thickness.
Question 4: An auditor identifies that a prerequisite program (sanitation) is being used to control a significant biological hazard rather than a CCP. Under a rigorous HACCP diagnostic review, this is:
- Acceptable if the prerequisite program has written procedures
- A critical gap because significant hazards must be controlled at a CCP with defined critical limits and monitoring (Correct answer)
- Acceptable if the sanitation program has been validated once
- Acceptable only for low-risk products
Correct answer: A critical gap because significant hazards must be controlled at a CCP with defined critical limits and monitoring
Significant hazards identified in the hazard analysis must be controlled at a CCP with measurable critical limits, monitoring, and corrective actions — a prerequisite program alone is insufficient.
Question 5: During HACCP record review, an auditor notes that monitoring records are filled out in advance (pre-logged). What is the MOST appropriate audit finding?
- Minor nonconformance — pre-logging saves time
- Critical nonconformance — pre-logged records are falsified and cannot verify actual process conditions (Correct answer)
- No finding — as long as the process ultimately meets the critical limit
- Observation only — recommend improved training
Correct answer: Critical nonconformance — pre-logged records are falsified and cannot verify actual process conditions
Pre-logged records constitute falsification of food safety records; they provide no assurance that actual conditions were monitored, representing a critical system breakdown.
Question 6: A juice manufacturer's HACCP plan includes a 5-log pathogen reduction step. During an audit, the auditor finds that this step's validation study used apple cider as the product matrix but the facility now also processes orange juice. What is the key diagnostic concern?
- Orange juice color may interfere with visual monitoring
- The validation may not be applicable to orange juice due to different pH, sugar content, and pathogen behavior (Correct answer)
- The 5-log reduction applies universally to all juice products
- The validation needs to be repeated only if a new pathogen is identified
Correct answer: The validation may not be applicable to orange juice due to different pH, sugar content, and pathogen behavior
Validation studies are product-specific; differences in pH, Brix, and composition between apple cider and orange juice may affect pathogen lethality, requiring separate validation.
Question 7: An auditor finds that a facility's HACCP team has not been updated to include a new quality assurance manager who has taken over food safety responsibilities. What HACCP system element does this primarily affect?
- The hazard analysis completeness
- The HACCP team description and multidisciplinary expertise documentation (Correct answer)
- The corrective action procedures
- The verification schedule
Correct answer: The HACCP team description and multidisciplinary expertise documentation
The HACCP team must be current and reflect the multidisciplinary expertise available; an outdated team roster undermines accountability and may signal gaps in expertise coverage.
CHA Advanced Diagnostics & Troubleshooting 3
An auditor reviews a HACCP plan for a smoked fish operation and finds no CCP for water phase salt (WPS) control, only a CCP for smoking temperature.
What hazard is MOST likely unaddressed?