PDX DCEO Qualification Card

How many gallons of water do you hold in your water tanks? How many tanks?

Varies by site. PDX4 is 2 x 40,200 gallons and 2 x 51,000 gallons

How would you respond to the following alarm: Low system supply water pressure (Loss of water)

Verify proper pump operation. Verify adequate tank levels (if low, check proper skid operations). Verify proper valve lineups for supplying water. Perform rounds on potentially affected equipment.

How would you respond to the following alarm: Storage tank low level alarm

Verify tank level. Verify skid operations. If skid is tripped, determine and correct cause. If weekly flushing and dumping is occurring, monitor tank levels. Verify proper valve lineups for supplying water. Perform rounds on potentially affected equipment.

Piping ruptures in the WT/RO system to include: Downstream of permeate side of skid

Shut closest upstream and downstream valves to isolate rupture. Verify proper operation of standby skid. Perform rounds on potentially affected equipment.

Piping ruptures in the WT/RO system to include: Upstream of skid, downstream of ICW inlet valve

Shut closest upstream and downstream valves to isolate rupture. Verify proper operation of standby skid. Perform rounds on potentially affected equipment.

What is reverse osmosis and why is it preferred?

Reverse Osmosis is a form of water purification that uses pressure applied to "dirty" water. This drives the water molecules across a semi-permeable membrane while leaving contaminants behind. The result is an almost pure water.

What is the purpose of the water tanks and where are they filled from?

For some sites, Water tanks are a redundant water source in the event that we lose city water. Water tanks are filled from our city water source. For other sites, water tanks are where treated water is stored before building use.

Where are the Industrial Waste Water lift station pumps located?

Varies by site. PDX4 located in front of loading dock.

Where are the in-ground industrial cooling water isolation valve located?

Varies by site. PDX4 located in front of main security building.

Where is the Industrial Waste Water lift station located?

Varies by site. PDX4 located in front of loading dock.

Why do we flush the evaporative media and at what frequency?

Quarterly to remove impurity build up (improves efficiency).

Answer the following regarding rackdown events: How would you respond to a TOR Failure?

Place Splinter in Pending, Work of DCO Master Workflow. Mark Rack with visual indicator (see it on both sides). Follow Work Flow to troubleshoot bad TOR, Power Drain, Proceed to Storm Rack while TOR is powering back up, grab replacement TOR from Storm Rack, if services haven't recovered, follow work flow to replace TOR.

Answer the following regarding rackdown events: Name the different ways personnel are notified of a rackdown

Via E-mail, Alarm via shift phone, SIM ticket, Rackdown slack channel.

Answer the following regarding rackdown events: What is a rackdown?

An EBS or EC2 rack with 25% or more hosts lost.

Answer the following regarding rackdown events: What is a the purpose of DCEO Rackdown Ticket?

Notification and tracking.

Answer the following regarding rackdown events: What is the rackdown workflow?

Interactive rack troubleshooting and restoration procedure.

Answer the following regarding rackdown events: What is the typical rack down ticket severity and why?

SEV 2 to prioritize rack restoration. SLA of 45 minutes to meet promise of 99.999% up time.

Answer the following regarding rackdown events: Which racks will we lose if an IOB or PDP breaker trips? What will happen to EC2 and Networking Racks?

All Single Source (Prod) Racks will go offline.

N+C's will transfer to Catcher.

2N's will swing load onto their other source (A or B).

Define the following power redundancies: 2N

Twice what is necessary.

Define the following power redundancies: C2N

Twice what is necessary plus a catcher (zone defense).