AHERA Project Designer cheat sheet

AHERA (40 CFR 763) applies to local education agencies (LEAs) and requires accredited inspectors, management planners, and project designers for school work.

NESHAP (40 CFR 61 Subpart M) governs asbestos handling, stripping, and disposal for all facilities, not just schools; it is a work-practice standard, not a worker-safety standard.

OSHA standards split by sector: 29 CFR 1926.1101 covers construction/abatement, 29 CFR 1910.1001 covers general industry; both set PEL 0.1 f/cc 8-hr TWA and EL 1.0 f/cc 30-min excursion.

Class I work = removal of surfacing material (TSI, sprayed-on) or ACM flooring installed with troweled-on surfacing; Class II = removal of other ACM including flooring, roofing, siding.

Class III = repair/maintenance of ACM likely to disturb it; Class IV = maintenance/custodial cleanup of ACM waste and debris, requiring at least 2-hour awareness training.

Accreditation categories: inspector, management planner, project designer, contractor/supervisor, worker; refresher required annually for all disciplines.

A project designer designs response actions when the planned work exceeds a minor fiber-release operation or requires abatement, and must be accredited in the discipline.

EPA Model Accreditation Plan (40 CFR 763 Appendix C) sets minimum training hours; project designer training is 24 hours (plus inspector/management planner prerequisites).

ACM is material containing more than 1% asbestos by calibrated PLM (polarized light microscopy) or other validated method.

Bulk samples must be collected in a wet state using a mini- or full-containment technique; sample each homogeneous area with sufficient quantity per EPA guidance.

Homogeneous areas group materials by similar composition, color, texture, and date of application; sample each distinct layer, not just the surface.

PLM is standard for bulk identification; point counting is used to resolve borderline (near 1%) samples; TEM is used for air and for confirming fine fibers.

Category I nonfriable: resilient flooring, asphalt roofing; Category II nonfriable: gaskets, some roofing, cement products; both can become regulated ACM if crumbled, pulverized, or reduced to powder.

Friability is the tendency to crumble under hand pressure; friable materials (TSI, sprayed-on fireproofing) present higher release potential.

Assessment includes physical condition (damaged, significant damage, potential damage) and degree of functional impairment; these feed the management planner's hazard ranking.

Presumed ACM: materials not sampled are presumed ACM until proven otherwise; the inspector must document sampling strategy and limitations.

Abatement methods: removal, enclosure, encapsulation, repair, and operations and maintenance (O&M); selection depends on condition, accessibility, and cost.

Enclosure builds an airtight barrier around ACM; encapsulation seals the surface with a coating; neither eliminates the hazard, so future disturbance requires controls.

Removal is required before demolition or renovation that will disturb ACM; NESHAP requires removal of RACM before demolition.

Negative-pressure containment uses HEPA filtration; typical target is 4 air changes per hour minimum (some specs require more) with daily verification.

Wet methods (amended water with surfactant) suppress fiber release; amended water is water plus a wetting agent per OSHA.

Glovebag is a small-scale removal method for pipe insulation; it must be sealed and HEPA-vacuumed, with a negative-pressure glovebag for larger jobs.

Encapsulation must be compatible with the substrate and tested; sealants can fail and re-release fibers, so periodic reinspection is required.

Worker decontamination uses a three-stage unit: equipment room, shower, clean room, arranged so workers move from dirty to clean without backtracking.

The project designer prepares a written project design including scope, methods, schedules, worker protection, air monitoring, and waste handling.

Specifications must be performance-based or prescriptive, and must cite applicable standards: AHERA, NESHAP, OSHA, and local codes.

Drawings should include containment layout, negative-pressure units, decon units, and material quantities; quantities drive cost and schedule.

The design must define clearance criteria (e.g., 0.01 f/cc PCM or 70 s/cm² TEM) and the number of samples per area.

Specifications include submittals, pre-construction conference requirements, and contractor qualifications (accreditation, licensing, insurance).

Project designer must coordinate with the management planner and LEA to ensure the design is consistent with the management plan.

Change orders and RFIs must be documented; the designer reviews substitutions to confirm they meet the specification.

Design must address occupant protection and relocation, notification, and emergency procedures.

PEL 0.1 f/cc 8-hr TWA; EL 1.0 f/cc 30-min excursion; both are enforceable under OSHA 1926.1101 and 1910.1001.

Respiratory protection: half-mask APR with HEPA filters for below PEL; full-face or PAPR for higher; supplied-air for high concentrations.

Respirator program requires medical evaluation, fit testing (annual), and training; no facial hair that interferes with seal.

Protective clothing: disposable coveralls, boots, gloves; remove in equipment room before shower; do not take contaminated clothing home.

Medical surveillance: required for workers above PEL for 30+ days/year, or in Class I/II/III work; includes physical exam and chest X-ray.

Exposure monitoring: initial monitoring to characterize exposure; periodic monitoring if above PEL; results provided to workers.

Hygiene facilities: showers, change rooms, and separate clean/dirty areas; eating, drinking, and smoking prohibited in regulated areas.

Training: Class I/II/III workers require 32-hour training plus annual refresher; Class IV requires 2-hour awareness training.

Clearance air monitoring uses PCM (phase contrast microscopy) with a limit of 0.01 f/cc; TEM is used when PCM is inadequate (e.g., fine fibers).

Aggressive sampling: use a fan or blower to disturb air before sampling; required for final clearance in many protocols.

Clearance requires visual inspection first (no visible debris), then air sampling; area must be dry and containment intact.

Number of samples: at least 5 per containment area for clearance, or per protocol; sample locations distributed throughout.

Waste disposal: ACM waste must be wetted, double-bagged in leak-tight containers, labeled, and transported per NESHAP and DOT rules.

NESHAP requires waste shipment records and disposal at an approved landfill; keep records for at least 2 years (longer per some states).

Air monitoring records must include calibration, chain of custody, and laboratory accreditation; retain per AHERA/OSHA.

Final air clearance must be met before reoccupancy; if exceeded, re-clean and re-test.

Contract documents include the project design, specifications, drawings, and general conditions; the designer ensures consistency.

Pre-construction conference: review scope, schedule, safety, and communication; document attendance and minutes.

Daily logs record progress, weather, air monitoring results, and any deviations; they are part of the project record.

Submittals: contractor submits product data, schedules, and qualifications; designer reviews and approves.

Recordkeeping: AHERA requires LEAs to maintain management plans, inspection reports, and abatement records; retain for at least 3 years (some records longer).

OSHA requires exposure records for 30 years and medical records for 30 years; training records for 1 year beyond employment.

Closeout: final inspection, clearance reports, waste manifests, and as-built drawings; deliver to owner.

Change orders and claims must be documented with cost and schedule impact; maintain a log.