Quality Control and Food Safety

Introduction to Quality Control in Baking

Quality control and food safety are fundamental pillars of the baker's trade in Canada. For the Red Seal exam, you must master not only production techniques but also all the standards, procedures, and calculations that ensure consumer safety. This chapter covers quality management systems, biological/chemical/physical hazards, critical control points, traceability, and applicable Canadian standards.

Food safety refers to all the conditions and measures necessary to ensure that food is safe for human consumption. Quality control (QC) encompasses the systematic verification procedures that ensure products meet established specifications (weight, volume, texture, composition, safety).

Food Hazards: Classification and Prevention

Biological Hazards

Biological hazards represent the most frequent cause of foodborne illness in baking. They include:

Type	Examples	Typical Source	Destruction Temperature
Pathogenic bacteria	Salmonella, E. coli, Listeria monocytogenes	Raw flour, eggs, dairy products	74 °C minimum internal temperature
Viruses	Norovirus, Hepatitis A	Contaminated staff, water	Heat-resistant
Molds	Penicillium, Aspergillus	Environment, air, ingredients	80 °C (mycotoxins are heat-resistant)
Wild yeasts	Saccharomyces cerevisiae (contamination)	Air, surfaces	60 °C

Listeria monocytogenes is particularly concerning in baking because it can grow at refrigeration temperatures (0–4 °C) and survive in humid environments. Products containing pastry creams, cheese fillings, or fresh fruit present a high risk.

Chemical Hazards

Chemical hazards include:

Allergens: gluten, eggs, milk, soy, peanuts, tree nuts, sesame, sulfites, mustard, fish, crustaceans, mollusks. Canadian regulations require mandatory declaration on labels.

Cleaning contaminants: residues from detergents, sanitizers, food-grade lubricants.

Mycotoxins: produced by molds on grains (aflatoxins, ochratoxin A). Visual inspection of raw materials is insufficient — you need certified suppliers.

Fat oxidation: rancidity producing toxic aldehydes and ketones.

Acrylamide: formed during high-temperature baking (>120 °C) of starch-rich products. Reduce baking temperature and time to minimize its formation.

Physical Hazards

Type of Contaminant	Source	Control Point
Glass	Light bulbs, broken containers	Protected lighting, inspection
Metal	Worn equipment, staples	Metal detectors, magnets
Plastic	Packaging, scrapers	Visual inspection
Wood	Pallets, crates	Separation of zones
Stones	Raw materials	Sieving, sorting

The Canadian Food Code (Interpretation Guide) requires establishments to implement physical contaminant prevention measures, including preventive equipment maintenance and inspection of raw materials upon receipt.

Food Safety Management Systems

The HACCP System (Hazard Analysis Critical Control Points)

The HACCP system is the reference method in Canada for controlling food hazards. It is based on 7 principles:

25.Hazard analysis: identify potential hazards at each step of the process.

26.Determination of critical control points (CCPs): steps where control is essential to prevent/eliminate a hazard.

27.Establishment of critical limits: maximum/minimum values (temperature, time, pH, aw).

28.Implementation of a monitoring system: measurements and records.

29.Corrective actions: procedures to follow when limits are exceeded.

30.Verification: audits, testing, periodic reviews.

31.Documentation and record-keeping: evidence of compliance.

The 5 Preliminary Steps of HACCP

Before applying the 7 principles, you must:

34.Form a multidisciplinary HACCP team.

35.Describe the product (composition, pH, aw, packaging, storage conditions).

36.Identify the intended use (direct consumption, further cooking).

37.Establish a process flow diagram (production flow).

38.Confirm the flow diagram on site.

Critical Control Points (CCPs) in Baking

Step	Hazard	Critical Limit	Monitoring
Receiving raw materials	Biological (salmonella in eggs)	Temperature ≤ 4 °C for refrigerated products	Check at delivery
Baking	Biological (pathogen survival)	Internal temperature ≥ 74 °C (or 82 °C for certain fillings)	Temperature probe
Cooling	Biological (bacterial growth)	From 60 °C to 20 °C in ≤ 2 h, then to 4 °C in ≤ 4 h	Temperature recorder
Cold storage	Biological	≤ 4 °C	Calibrated thermometer
Hot holding	Biological	≥ 60 °C	Calibrated thermometer

Cooling calculation: The Canadian rule requires cooling from 60 °C to 20 °C within 2 hours maximum, then from 20 °C to 4 °C within 4 additional hours maximum. Total time must not exceed 6 hours.

Good Manufacturing Practices (GMPs) and Prerequisites

GMPs form the foundation upon which the HACCP system is built. They include:

Personnel Hygiene

Hand washing: hot water (≥ 38 °C), antibacterial soap, scrub for ≥ 20 seconds, dry with disposable towels.

Wearing work attire: jacket, pants, closed-toe shoes, hair net, single-use gloves (changed every 2 hours or after any contamination).

No jewelry, watches, or rings (except a plain wedding band).

Injury management: brightly colored waterproof bandages, mandatory reporting.

Illness: exclusion of staff with gastrointestinal or respiratory symptoms, or infected wounds.

Cleaning and Sanitizing

The S.C.R.R. protocol (Scrape, Clean, Rinse, Sanitize) is essential:

53.Preliminary cleaning: remove gross residue.

54.Detergent application: apply a detergent suited to the type of soil.

55.Rinsing: remove detergent and soil.

56.Sanitizing: apply a food-grade sanitizer (e.g., chlorine solution at 100 ppm for surfaces, 200 ppm for floors).

57.Final rinse (if required by the sanitizer manufacturer).

Dilution calculation: To prepare a 100 ppm chlorine solution from a 10% stock solution (100,000 ppm), use the formula:

C₁ × V₁ = C₂ × V₂

Example: For 10 liters of water (10,000 mL), how many mL of stock solution are needed?

100,000 × V₁ = 100 × 10,000

V₁ = 1,000,000 / 100,000 = 10 mL

Integrated Pest Management

Prevention: seal openings, install screens, door sweeps.

Detection: UV light traps, sticky traps, regular inspections.

Elimination: use a certified exterminator, document interventions.

Chemicals: stored in a locked room, separate from food, labeled.

Traceability and Product Recall

Traceability Principles

Traceability is the ability to track a product through all stages: receiving, production, distribution. The Safe Food for Canadians Regulations (SFCR) requires:

Unique identification of each production lot (lot code, production date).

Records of suppliers and customers.

Record retention for 2 years minimum (or product shelf life + 1 year).

Ability to trace a product one step back and one step forward.

Recall Procedure

In the event of a recall, the standard procedure includes:

78.Immediate removal of the product from shelves.

79.Notification to the Canadian Food Inspection Agency (CFIA) within 24 hours.

80.Identification of affected lots via traceability records.

81.Communication to customers and consumers.

82.Correction of the root cause.

83.Verification of the effectiveness of corrective measures.

Canadian Standards and Regulations

Key Regulatory References

Standard / Regulation	Purpose	Key Points for the Baker
Safe Food for Canadians Act (SFCA)	Legal framework for food safety	Licensing requirement, preventive control plan
Safe Food for Canadians Regulations (SFCR)	Detailed requirements	Mandatory HACCP, traceability, recall
Food and Drug Regulations – Labeling	Consumer information	Ingredient list, allergens, nutrition facts
Canadian Food Code	Interpretation guide	Good practices, microbiological criteria
Food and Drug Regulations	Composition standards	Permitted additives, standards of identity

Labeling Requirements

Bakery product labels must include:

Product name (legal designation).

Ingredient list in descending order of weight.

Allergen declaration: the 10 Canadian priority allergens (peanuts, tree nuts, sesame, eggs, milk, fish, crustaceans, mollusks, soy, wheat/gluten, sulfites > 10 ppm).

Nutrition facts table (per serving and % daily value).

Best-before date or "Packaged on" date depending on the product.

Name and address of the manufacturer.

Net weight (in grams or kilograms).

Common trap: Gluten is not an ingredient in itself — you must declare "wheat," "rye," "barley," etc. The claim "gluten-free" is regulated and requires a content of < 20 ppm gluten.

Quality Control: Measurements and Calculations

Product Weight Control

The Food and Drug Regulations (Section B.01.007) require that the declared net weight be respected. In practice, the average weight of a lot must be greater than or equal to the declared weight, and no product may be below the declared weight by more than the regulatory tolerance.

Calculating the mean and standard deviation:

For a sample of n weighed products (x₁, x₂, ..., xₙ):

Mean (x̄) = Σxᵢ / n

Standard deviation (s) = √[Σ(xᵢ − x̄)² / (n − 1)]

Practical rule: If the lot average is below the declared weight, the lot is non-compliant. If more than 2.5% of products are below the declared weight, the lot is non-compliant.

Temperature Control

Thermometer calibration must be performed:

At least once per week.

After physical shock.

After exposure to extreme temperatures.

Calibration method: Ice point (0 °C) — place the probe in an ice/water slush, wait 30 seconds, adjust to 0 °C. Boiling point (100 °C at sea level) — adjust to 100 °C. Tolerance is ± 1 °C.

Water Activity (aw) Control

Water activity (aw) measures the availability of free water in a product. It determines the ability of microorganisms to grow:

aw Range	Microorganisms Capable of Growth	Product Examples
0.95 – 1.00	Pathogenic bacteria (Salmonella, E. coli)	Fresh bread, creams
0.90 – 0.95	Bacteria, yeasts	Sandwich bread, cakes
0.80 – 0.90	Molds, osmophilic yeasts	Jams, fruit pastes
0.60 – 0.80	Xerophilic molds	Dry biscuits, crackers
< 0.60	No microbial growth	Crusty bread, rusks

Key rule: Products with aw < 0.85 do not require refrigeration for microbiological safety.

pH Control

pH influences bacterial growth. Most pathogenic bacteria grow between pH 4.6 and 9.0. Acidic foods (pH < 4.6) are considered safe with respect to botulism. In baking, pH is relevant for:

Fruit fillings (pH 3.5 – 4.5).

Fermented doughs (pH 4.0 – 5.5 after fermentation).

Pastry creams (pH 6.5 – 7.0 — risk zone).

Quality Control Procedures in Production

Receiving Inspection of Raw Materials

Raw Material	Control Criterion	Acceptable Value
Flour	Moisture	12 – 14%
Flour	Protein	10 – 14% depending on type
Flour	Ash	0.4 – 0.7% (type 55)
Liquid eggs	Temperature	≤ 4 °C
Liquid eggs	Pasteurization	Supplier certificate
Butter	Temperature	≤ 4 °C
Yeast	Production date	≤ 30 days
Yeast	Activity (fermentation test)	CO₂ volume ≥ 800 mL in 1 h

In-Process Control

Dough temperature: check with an insertion probe (target: 24 – 26 °C for fermented doughs, 20 – 22 °C for puff pastry).

Fermentation time: respect tolerances of ± 15 minutes.

Piece weight: weigh 10 pieces per lot, calculate the mean and standard deviation.

Baking: oven temperature (verified with a calibrated thermocouple), baking time, internal product temperature.

Final Product Control

Appearance: crust color (uniformity), volume, shape.

Texture: crumb structure (size and distribution of air cells), crumb elasticity.

Taste and aroma: sensory evaluation by a trained panel.

Microbiological analysis: sampling and submission to an accredited laboratory (frequency based on risk).

Product Preservation and Shelf Life

Factors Influencing Shelf Life

Factor	Effect	Control
aw	Microbial growth	Formulation, drying
pH	Microbial growth	Acidifiers, fermentation
Temperature	Reaction rate	Refrigeration, freezing
Oxygen	Oxidation, mold growth	Vacuum packaging, MAP
Relative humidity	Staling, mold growth	Barrier packaging

Typical Shelf Life

Product	Conditions	Duration
Sandwich bread	Room temperature	5 – 7 days
Sandwich bread	Frozen (−18 °C)	3 – 6 months
Croissant	Room temperature	2 – 3 days
Cream cake	Refrigerated (≤ 4 °C)	3 – 5 days
Dry biscuits	Room temperature	3 – 6 months
Fruit pie	Refrigerated	3 – 4 days

Common Pitfalls to Avoid

144.Confusing cleaning and sanitizing: Cleaning removes visible soil; sanitizing eliminates microorganisms. Both are mandatory and sequential.

145.Neglecting internal temperature: The oven temperature does not guarantee the internal temperature of the product. Always check the core of the product with a calibrated probe.

146.Forgetting cross-contamination of allergens: The same equipment used for products with and without nuts requires validated cleaning between productions. Cross-contamination is a major cause of recalls.

147.Misinterpreting dates: "Best before" indicates freshness, not safety. A product can be consumed after this date if properly stored, but the manufacturer no longer guarantees quality.

148.Underestimating cooling: Slowly cooling a cooked product is the most frequent cause of foodborne illness. Strictly respect cooling times.

149.Ignoring calibration: An uncalibrated thermometer gives false assurance. Calibrate regularly and document.

150.Confusing CCP and control point (CP): A CCP is a step where control is essential for safety. A CP is a non-critical quality control step for safety.

151.Forgetting documentation: "If it isn't written down, it doesn't exist." All controls must be recorded and archived.

152.Using non-approved chemicals: Only products bearing a CFIA or Health Canada registration number are authorized for food contact.

153.Neglecting staff training: Every employee must be trained in GMPs and HACCP, with annual updates.

Red Seal Exam Tips

Memorize critical temperatures: 74 °C (baking), 60 °C (hot holding), 4 °C (refrigeration), −18 °C (freezing), 38 °C (hand washing).

Know the 10 Canadian priority allergens by heart.

Master dilution and average weight calculations — calculation questions are common.

Understand the difference between HACCP and GMPs: GMPs are the prerequisites; HACCP is the system for controlling specific hazards.

Know how to identify a CCP: Ask yourself — "If this control fails, is the product dangerous?" If yes, it's a CCP.

Review cooling times: 2 h to go from 60 °C to 20 °C, 4 additional hours to go from 20 °C to 4 °C.

Summary

Food safety rests on three pillars: GMPs (hygiene, cleaning, training), the HACCP system (7 principles), and traceability.

Hazards are classified as biological (bacteria, viruses, molds), chemical (allergens, contaminants, mycotoxins), and physical (glass, metal, plastic).

Critical temperatures are: baking ≥ 74 °C, hot holding ≥ 60 °C, refrigeration ≤ 4 °C, freezing ≤ −18 °C.

Cooling must follow: 60 °C → 20 °C in ≤ 2 h, then 20 °C → 4 °C in ≤ 4 h.

Traceability requires records kept for 2 years and the ability to trace a product one step back and one step forward.

Labeling must declare the 10 priority allergens and comply with the Food and Drug Regulations.

Quality control includes verifying weights (average ≥ declared weight), temperatures (calibration ± 1 °C), and water activity (aw < 0.85 to avoid refrigeration).

The key Canadian standards are the SFCA, SFCR, Canadian Food Code, and Food and Drug Regulations.

Self-Assessment Questions

174.What is the maximum time to cool a product from 60 °C to 20 °C?

175.What are the 10 priority allergens in Canada?

176.What is the difference between a CCP and an ordinary control point?

177.How do you calculate the amount of stock solution needed to prepare 5 L of 200 ppm sanitizing solution from a 5% solution?

178.What is the minimum internal baking temperature for a bakery product containing eggs?

179.How long must you retain traceability records?

180.What is the pH below which botulism cannot develop?

181.What is the calibration tolerance for a food thermometer?

Answers: 1) 2 hours. 2) Peanuts, tree nuts, sesame, eggs, milk, fish, crustaceans, mollusks, soy, wheat/gluten (sulfites > 10 ppm). 3) A CCP is essential for safety; a control point is for quality. 4) C₁V₁ = C₂V₂ → 50,000 × V₁ = 200 × 5,000 → V₁ = 20 mL. 5) 74 °C. 6) 2 years. 7) 4.6. 8) ± 1 °C.

Quality Control and Food Safety