Capstone: site orientation and MOP review for an invented colocation facility

This capstone brings the course together. You will work with an invented colocation facility, Cedar Ridge Colocation, and complete two tasks that safety professionals, operations leads and experienced technicians do all the time. First, you will outline a site orientation for contractors and customer technicians, drawing on Lessons 1 to 11. Second, you will review a draft method of procedure for installing a new liquid-cooled AI rack, find its weaknesses and recommend changes. A model answer follows each task, but you will learn far more if you attempt each task before reading it.

Cedar Ridge and everyone in it are invented. The values in this lesson are illustrative and chosen to make the exercise realistic, not to describe any real site, product or standard requirement.

The facility

Cedar Ridge Colocation is a two-hall facility on a suburban industrial lot. Hall 1, built in 2014, has a 600 mm raised floor, air cooling with cold aisle containment and racks of up to about 15 kW, leased to enterprise customers in caged and open areas. Hall 2, completed in 2025, is slab on grade with overhead busway, hot aisle containment and rear-door and direct-to-chip liquid cooling, built for AI racks of 40 to 130 kW; it is about half occupied, and new racks arrive every week. The facility has two utility feeds, medium-voltage switchgear, four transformers, six diesel generators in a yard on the north side, UPS rooms for each hall, a lithium-ion battery room serving Hall 2 and a valve-regulated lead-acid battery room serving Hall 1. The meet-me room and a network room are protected by a clean agent system; the data halls have pre-action sprinklers and aspirating smoke detection. Equipment arrives at a two-bay loading dock and travels up a 1 in 12 ramp to the hall level. The building is about 9,000 m² in total.

The operator, Cedar Ridge Operations, employs about 30 people across operations, security and facilities, and uses contractors for electrical and mechanical maintenance, cleaning and security guarding. On a typical weekday there are 40 to 80 contractors and customer technicians on site, rising to more than 150 when a large customer is installing. Cedar Ridge is in a Canadian province and is provincially regulated. Its corporate electrical safety program is based on CSA Z462, and its fire protection follows the provincial building and fire codes, with NFPA 75 required by its insurer.

Task 1: outline a site orientation

Cedar Ridge wants a 45-minute orientation for every contractor and customer technician before their first unescorted visit. Using what you learned in this course, outline what it should cover. For each topic, write the key messages and note which hazards at Cedar Ridge make them important. Try to keep it to the ten or so topics that matter most; an orientation that tries to cover everything teaches nothing.

Before reading the model answer, attempt the task. Think about who will attend, what they are likely to know already, and which mistakes at Cedar Ridge would be most serious.

Model answer: orientation outline

Good answers vary, but strong ones share some features. They put the reasons before the rules, because people follow rules they understand. They are specific to Cedar Ridge: the two floor types, the dock ramp, the clean agent rooms and the lithium-ion battery room. They make stop-work authority and reporting explicit. They leave detailed technical content, such as arc flash boundaries or noise calculations, to the specialist training required for specific jobs, and instead tell people what they must not do and whom to ask. Many sites end orientation with a short quiz and a walk-through of the route from the entrance to the work area, pointing out exits, EPOs, AEDs and restricted rooms.

Task 2: review a draft MOP

A customer's vendor has submitted the following draft MOP to install a new liquid-cooled AI rack in Hall 2. Read it carefully and list every weakness you can find, then recommend changes. Use the review checklist from Lesson 9: equipment identifiers, redundancy, energy sources, safety controls, sequence, expected results and hold points, backout, timing and communication.

Useful facts for your review: the rack weighs 1,450 kg including coolant; Hall 2 busway is fed on A and B paths from separate UPS systems; installing a tap-off box on live busway is an energized task that Cedar Ridge restricts to qualified electricians under its electrical safety program; the row manifold serves eight other racks already in operation; Hall 2 has hot aisle containment and aspirating smoke detection; and Tuesday afternoon is the busiest period at the loading dock.

Model answer: MOP review findings

The most serious weaknesses are the manual push up the ramp, unqualified workers doing energized busway work without a permit, and the uncontrolled coolant connection to a manifold serving live racks. Each could cause a serious injury, and the last two could also cause an outage for other customers. A reviewer should return the MOP for rework rather than approve it with comments.

# A simple MOP "lint": flag steps that lack expected results, verification or qualified roles
steps = [
    {"n": 1, "text": "Unload rack at dock", "expected": "", "verify": False, "energized": False, "role": "vendor"},
    {"n": 2, "text": "Push rack up ramp", "expected": "", "verify": False, "energized": False, "role": "vendor"},
    {"n": 4, "text": "Install tap-off box on busway 2B", "expected": "", "verify": False, "energized": True, "role": "vendor"},
    {"n": 6, "text": "Open coolant valves to manifold", "expected": "", "verify": False, "energized": False, "role": "vendor"},
    {"n": 7, "text": "Power on rack", "expected": "servers boot", "verify": False, "energized": True, "role": "vendor"},
]
heavy_words = ("push", "ramp")
findings = 0
for s in steps:
    issues = []
    if not s["expected"]:
        issues.append("no expected result")
    if s["energized"] and s["role"] != "qualified electrician":
        issues.append("energized task without qualified person")
    if s["energized"] and not s["verify"]:
        issues.append("no peer verification")
    if any(w in s["text"].lower() for w in heavy_words):
        issues.append("check move plan and mechanical aid")
    if "coolant" in s["text"].lower():
        issues.append("needs leak check and shared-manifold hold point")
    findings += len(issues)
    print(f"step {s['n']}: {s['text']}: " + ("; ".join(issues) if issues else "OK"))
print("Total findings:", findings)

step 1: Unload rack at dock: no expected result
step 2: Push rack up ramp: no expected result; check move plan and mechanical aid
step 4: Install tap-off box on busway 2B: no expected result; energized task without qualified person; no peer verification
step 6: Open coolant valves to manifold: no expected result; needs leak check and shared-manifold hold point
step 7: Power on rack: energized task without qualified person; no peer verification
Total findings: 10

An automated check like this cannot replace a human reviewer, who understands the facility and the work, but it shows how review criteria can be made explicit and applied the same way every time. Some operators build such checks into their change management tools.

Reflecting on the course

The orientation and the MOP review together cover most of what makes data centre safety distinctive. The orientation sets the expectations for everyone who walks in the door; the MOP review applies them to a specific job, where the hazards of the floor, the power system, the cooling system, heavy equipment and the live facility meet. In both, the same habits matter: understand why each rule exists, plan the work before doing it, verify instead of assuming, communicate clearly, and stop when something is not as expected.

From here, the data centre sites track continues with HSE-321, Electrical Safety in Critical Facilities, which takes the electrical awareness of Lesson 7 into the practice of arc flash risk assessment, energized work and UPS and switchgear hazards; HSE-322, Battery Rooms and Lithium-Ion Hazards, which covers the stored energy and thermal runaway hazards behind the Cedar Ridge battery rooms; and HSE-323, Fire Suppression and Liquid Cooling Hazards, which covers the clean agent and pre-action systems and the coolant hazards that featured in the MOP review.