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A+ Core 2 · CompTIA 220-1202 V15 · Objective C2-4.5

Summarize environmental impacts and local environment controls

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Objective 4.5: Summarize environmental impacts and local environment controls

Cert: CompTIA A+ Core 2 (220-1202) V15 Domain: 4.0 Operational Procedures Weight: Part of the 21% Operational Procedures domain Depth: Summarize. The candidate must recognize MSDS documentation, proper disposal of batteries/toner/devices, environmental factors affecting equipment, and power protection devices.

What this objective tests

You should know what an MSDS is, how to dispose of hazardous IT consumables, how to manage environmental conditions for equipment, and how UPS and surge suppressors protect against power events.

Key facts

Material Safety Data Sheet (MSDS) / Safety Data Sheet (SDS):

  • Document from a chemical/material manufacturer detailing hazards, handling, storage, disposal, first aid.
  • 16-section standard (since 2015 OSHA HazCom alignment with GHS).
  • Required for any hazardous material in the workplace: cleaning chemicals, toner, batteries, solvents.
  • Keep accessible to anyone handling the material.

Proper battery disposal:

  • Lithium-ion: never landfill. Fire risk; many local laws prohibit. Recycle through battery-specific channels (Call2Recycle, Best Buy, Home Depot).
  • Lead-acid (UPS batteries): heavily regulated; recycle at battery dealers or certified e-waste facilities.
  • Alkaline: in most jurisdictions landfill is allowed but recycling is preferred.
  • Damaged or swollen batteries: handle carefully, isolate from heat, recycle promptly. Don't store with other waste.

Proper toner disposal:

  • Empty toner cartridges: recycle via manufacturer programs (HP, Canon, Brother all offer free return labels).
  • Toner powder: don't vacuum with a standard vacuum (fine particles bypass filter and can ignite). Use a toner-specific vacuum or wipe with damp microfiber.
  • Skin contact: wash with cold water (warm sets toner like ink).

Proper disposal of other devices and assets:

  • E-waste regulations vary by jurisdiction. Many states/countries ban electronics from regular landfill.
  • Certified e-waste recyclers (R2, e-Stewards certifications) ensure proper handling.
  • Drives must be wiped or destroyed before disposal (covered in obj 2.9).

Temperature awareness:

  • Computer equipment runs reliably in roughly 60-80°F (15-27°C) ambient.
  • Higher temperatures shorten component life; thermal throttling reduces performance.
  • Data centers typically maintain 64-80°F at the inlet (per ASHRAE TC 9.9 recommended range).

Humidity-level awareness:

  • Recommended range: 40-60% relative humidity for equipment rooms.
  • Too dry: static electricity buildup (ESD risk).
  • Too humid: condensation risk on cool components.
  • Modern data centers use humidity control as part of HVAC.

Proper ventilation:

  • Equipment needs airflow for cooling. Don't stack cases on each other, don't pile papers on top of vents, don't block intake/exhaust.
  • Server racks: hot aisle / cold aisle layout in data centers.

Location / equipment placement:

  • Off the floor (water/dust ingress).
  • Away from direct sunlight (heat).
  • Away from heaters/vents (heat exposure).
  • Away from large motors or magnetic fields (interference).

Dust cleanup:

  • Dust accumulates inside cases and on heatsinks, reducing cooling effectiveness.
  • Clean periodically with compressed air (outdoors or in a ventilated area).
  • Wear a mask (dust contains skin cells, dander, etc.).

Compressed air / vacuums:

  • Compressed air: blow dust out. Don't tilt the can (releases liquid propellant). Don't spin fans with air (back-EMF can damage motherboard).
  • Vacuums: don't use standard household vacuums on electronics; they generate static. Use ESD-safe vacuums or compressed air.

Power surges:

  • Voltage spike (usually short, microseconds to milliseconds).
  • Causes: lightning, utility switching, large equipment cycling.
  • Protection: surge suppressor (also called surge protector). Sacrificial; takes the hit so equipment doesn't.

Brownouts:

  • Sustained voltage reduction. Power flickers, lights dim, equipment may reset.
  • Causes: utility overload, high demand events.
  • Protection: UPS with line conditioning maintains voltage to equipment during sags.

Blackouts:

  • Total loss of power.
  • Protection: UPS provides battery runtime to ride through short events; generator for longer outages.

Uninterruptible Power Supply (UPS):

  • Battery-backed power that takes over when utility power fails or sags.
  • Standby UPS: cheapest. Switches to battery on outage; brief switchover gap.
  • Line-interactive UPS: regulates voltage continuously; smoother transition.
  • Online (double-conversion) UPS: power always passes through battery/inverter; zero switchover. Best for critical equipment.
  • Sized by VA/watt rating and runtime needed.

Surge suppressor:

  • Diverts excess voltage to ground via MOVs (metal oxide varistors).
  • Rated in joules absorbed. Larger joule rating = more capacity / longer life.
  • Replace after a major surge event (MOVs degrade with each hit).
  • All UPS units include surge suppression; not all surge suppressors include UPS (no battery).

Common gotchas

  • Vacuuming toner with a regular vacuum. Fine particles pass through filter and can ignite in the motor. Use toner-specific vacuum or wipe with damp microfiber.
  • Lithium-ion battery in the trash. Fire risk in trucks and landfills. Recycle properly.
  • UPS not load-tested. Battery degrades; you find out during the next outage. Periodic load tests catch this.
  • Surge suppressor never replaced. MOVs are sacrificial; an old strip may have used up its protection on past surges. Replace every few years or after major surge.
  • Server room too cold. Wastes cooling cost; no benefit below 64-65°F. Modern equipment tolerates warmer temperatures than 1990s gear.
  • Humidity too low in winter. Static electricity issues become more frequent. Add humidifier or run ESD precautions more strictly.

Real-world context

Power protection ladder for an SMB:

  • Individual workstation: surge suppressor at minimum; line-interactive UPS for critical workstations (designers, finance, anyone whose work would be lost mid-edit on a sudden outage).
  • Servers / network equipment: line-interactive or online UPS. Sized for graceful shutdown time (5-15 minutes typical).
  • Whole facility: generator with automatic transfer switch for mission-critical operations. UPS bridges the generator startup gap.

Disposal program for an office:

  • Battery recycle bin near the break room or copy room.
  • Toner cartridge return shipments quarterly (manufacturer-provided labels).
  • E-waste pickup annually or as needed from a certified vendor (with certificate of destruction for drives).
  • MSDS binder or online portal accessible to staff handling materials.

Sources

  • [CompTIA A+ 220-1202 Exam Objectives Version 4.0, Section 4.5](../../../../../../30-RevyTechJourney/CompTIA%20A%2B%20220-1202%20Exam%20Objectives%20%284.0%29.pdf)
  • [OSHA: Hazard Communication / SDS](https://www.osha.gov/hazcom)
  • [ASHRAE TC 9.9: Data Center Power Equipment Thermal Guidelines](https://tpc.ashrae.org/Documents?cmtKey=0aa56eb2-e85c-4a40-be7d-e60ed3a9978e)
  • [EPA: Electronics Donation and Recycling](https://www.epa.gov/recycle/electronics-donation-and-recycling)
  • [Call2Recycle: Battery Recycling](https://www.call2recycle.org/)