Sanitation Sleuths Worksheet
Food Safety & Kitchen Sanitation Lab
Sanitation Sleuths Worksheet
Identify sanitation violations, explain contamination science, and prescribe corrective procedures.
Name:
Period/Date:
Total Score: ______ / 25 pts
Scoring Criteria: For each case, identify the exact mistake (1 pt), explain the hazard/pathogen risk (1 pt), and specify the proper corrective protocol (1 pt).
Cases 01–03 • 9 pts
Case 01
The Countertop Wipe-Down
Cross-Contamination 3 pts
Incident: A student cleans prep counters using a cloth previously used to wipe up raw chicken juices from a cutting station.
1. Specific Error Identified [1 pt]:
2. Contamination & Pathogen Risk [1 pt]:
3. Correct Sanitizing Protocol [1 pt]:
Case 02
The Cold-Water Blender Rinse
Bacterial Proliferation 3 pts
Incident: After making a smoothie, a student gives the blender assembly a quick rinse with cold water and stores it wet inside a closed cupboard.
1. Specific Error Identified [1 pt]:
2. Moisture & Biofilm Hazards [1 pt]:
3. Proper Wash-Sanitize-Dry Protocol [1 pt]:
Case 03
Pantry Chemical Storage
Chemical Hazard 3 pts
Incident: Cleaning chemicals and spray degreasers are stored on the bottom pantry shelf directly adjacent to sacks of flour and sugar.
1. Specific Error Identified [1 pt]:
2. Ingestion & Vapor Hazards [1 pt]:
3. Designated Storage Standards [1 pt]:
Food Safety & Sanitation Module • ServSafe Standards Page 1 of 2 • Turn Over for Cases 04–07 (16 pts)
Part II: Utensils, Equipment & Chemical Sanitizing Science
Examine equipment safety, surface maintenance, and chemical dwell times.
Cases 04–07 • 16 pts
Case 04
Steel Wool on Non-Stick Cookware
Physical / Toxic Hazard 3 pts
Incident: A student scrubs stuck food from a Teflon-coated non-stick frying pan using an abrasive steel wool scouring ball.
1. Mistake [1 pt]:
2. Coating Hazard [1 pt]:
3. Safe Cleaning Method [1 pt]:
Case 05
The Overnight Mop Bucket Soak
Bacterial Reservoir 3 pts
Incident: A mop used to clean sugary juice spills is left submerged head-down in a bucket of murky rinse water overnight.
1. Mistake [1 pt]:
2. Bacteria & Odor Hazard [1 pt]:
3. Proper Hang-Dry Protocol [1 pt]:
Case 06
Paper Towel Cutting Board Swap
Ready-to-Eat Contamination 3 pts
Incident: After cutting raw beef, a student wipes the board with a dry paper towel and immediately slices salad vegetables on it.
1. Mistake [1 pt]:
2. Pathogen Transfer Risk [1 pt]:
3. Correct Sanitation Steps [1 pt]:
Capstone Case 07
The Instant Sanitizer Wipe-Off
Chemical Dwell Science 7 pts
Incident: A student spots food crumbs and grease on a stainless prep counter. Without scraping or washing first, they spray sanitizer directly onto the soiled surface and wipe it dry 2 seconds later.
1. Identify the TWO Distinct Critical Errors Made [2 pts]:
2. Chemical Inactivation & Dwell Time Failure [2 pts]:
Why did the chemical fail to sanitize? (Mention organic matter & contact time):
3. Mandatory 5-Step Surface Protocol [3 pts]:
List the complete chronological sequence required by health codes:
Sanitation Sleuths • ServSafe Standards Alignment Page 2 of 2 • Total Score: ______ / 25 pts
Sanitation Sleuths Answer Key
Teacher Evaluation & Grading Guide
Sanitation Sleuths Answer Key
Model responses, scientific rationale, and scoring criteria aligned with ServSafe & FDA Food Code.
Total Value: 25 Points
Passing Benchmark: 20 / 25 (80%)
Cases 1–6 (3 pts ea) • Case 7 (7 pts)
Grading Rubric (per prompt): 1 pt = Complete & scientifically accurate • 0.5 pt = Partial / vague • 0 pt = Incorrect Page 1: 9 Points Total
Case 01
The Countertop Wipe-Down
Cross-Contamination 3 Points Total
1. Specific Error [1 pt]:
Using a cloth contaminated with raw poultry fluid to clean food prep counters. Wiping spreads bacteria rather than sanitizing.
2. Contamination & Pathogen Risk [1 pt]:
Raw poultry carries virulent pathogens including Salmonella enterica and Campylobacter. Invisible fluid leaves bacteria on the prep surface that contaminate ready-to-eat foods.
3. Correct Protocol [1 pt]:
Immediately place cloth into designated laundry/hazard hamper. Wash counter with detergent and warm water, rinse, spray approved chemical sanitizer, and allow to air dry.
Case 02
The Cold-Water Blender Rinse
Biofilm & Moisture 3 Points Total
1. Specific Error [1 pt]:
Failing to disassemble and wash blades with soap/hot water, and storing equipment enclosed in a cupboard while wet.
2. Moisture & Biofilm Hazards [1 pt]:
Cold water cannot dissolve dairy fats or fruit pectin. Enclosing damp parts in a dark, room-temperature cabinet fosters rapid bacterial incubation, biofilm, and mold growth.
3. Proper Protocol [1 pt]:
Disassemble pitcher, gasket, and blade. Wash in hot detergent water (≥110°F), rinse in clean water, sanitize, and invert to air dry completely before cabinet storage.
Case 03
Pantry Chemical Storage
Chemical Contamination 3 Points Total
1. Specific Error [1 pt]:
Storing industrial cleaners directly adjacent to porous dry food ingredients (flour and sugar) in the food pantry.
2. Ingestion & Vapor Hazards [1 pt]:
Chemical bottles can leak, puncture, or vent vapors that penetrate paper sacks. Ingestion of sodium hypochlorite (bleach) or degreasers causes severe chemical burns and poisoning.
3. Storage Standards [1 pt]:
Store all chemicals in a dedicated, lockable chemical closet or separate utility shelf away from food areas. Must be stored below and physically segregated from all foods.
