1 Scope
1.1This standard covers the survey, identification, notification, containment, removal, encapsulation, transport, and disposal of regulated hazardous building materials encountered during renovation, alteration, or demolition of existing structures.
NOTE The regulated materials addressed are asbestos-containing materials (ACM), lead-based paint (LBP) and lead-coated components, and polychlorinated biphenyls (PCBs) in caulk, sealants, and glazing compounds. (1.2)
NOTE Incidental regulated materials commonly found during a pre-demolition survey — mercury-containing equipment, PCB-containing lamp ballasts, and refrigerant-charged equipment — are addressed here only for survey, segregation, and disposal-coordination purposes. (1.3)
NOTE Three abatement disciplines are consolidated here because small-to-mid-size renovation and demolition projects routinely encounter asbestos, lead, and PCBs together in a single pre-demolition scope, and separating them into three contracts fragments the survey, the containment, the waste stream, and the clearance schedule. (1.4)
NOTE This standard governs the abatement work that precedes or accompanies demolition; the demolition of the structure itself is a separate scope. (1.5)
1.5.1Abatement of regulated materials shall be complete and cleared before any demolition or selective-demolition activity that would disturb those materials begins.
1.5.2The Contractor shall not commence general demolition in any area until all required clearance documentation for that area has been issued.
2 Referenced Standards
2.1Work shall comply with the latest adopted edition of each of the following regulations and standards unless a specific edition or section is cited, and with all more-stringent state and local requirements.
2.2Where referenced requirements conflict, the more stringent requirement shall govern unless the Owner's Industrial Hygienist directs otherwise in writing.
NOTE Federal regulation is a floor, not a ceiling: most states impose separate asbestos and lead contractor licensing and may set lower clearance thresholds, and those requirements apply in addition to the federal standards listed below. (2.3)
| Standard |
Title |
| 40 CFR 61 Subpart M |
NESHAP — Asbestos (National Emission Standard for Hazardous Air Pollutants) |
| 29 CFR 1926.1101 |
OSHA Asbestos Standard for the Construction Industry |
| 29 CFR 1926.62 |
OSHA Lead in Construction Standard |
| 40 CFR 745 Subpart L |
Requirements for Lead-Based Paint Activities in Target Housing and Child-Occupied Facilities |
| 40 CFR 745 Subpart E |
Renovation, Repair, and Painting (RRP) Rule |
| 40 CFR 761 |
Polychlorinated Biphenyls (PCBs) Use Prohibitions (TSCA) |
| ASTM E1368 |
Visual Inspection of Asbestos Abatement Projects |
| ASTM E1494 |
Encapsulants for Friable Asbestos-Containing Building Materials |
| ASTM E2362 |
Analysis of Asbestos in Dust Samples by Micro-Vacuum Technique and TEM |
| NIOSH 7400 / 7402 |
Asbestos Fibers by Phase Contrast Microscopy (PCM) and Transmission Electron Microscopy (TEM) |
| EPA 560/5-85-024 |
Guidance for Controlling Asbestos-Containing Materials in Buildings (Purple Book) |
| HUD Guidelines (2012, rev. 2024) |
Evaluation and Control of Lead-Based Paint Hazards in Housing |
| NFPA 1 |
Fire Code (temporary construction and egress in occupied buildings) |
3 Survey and Hazard Assessment
NOTE A regulated-materials survey establishes what is present, where it is, how much there is, and in what condition — and every downstream decision (notification thresholds, work classification, containment, and waste routing) depends on it. (3.1)
NOTE The single most expensive failure on an abatement project is a survey that quantifies presence but not extent: a quantity-unknown scope converts the entire abatement into change-order exposure, because the demolition bid cannot price what the survey did not measure. (3.2)
3.2.1The Owner shall commission a pre-demolition hazardous-materials survey by a licensed asbestos building inspector and a certified lead risk assessor before the project is bid.
3.2.2The survey shall identify, locate, and quantify all suspect ACM, LBP, and PCB-containing materials in the renovation or demolition area.
3.2.3Suspect materials not sampled shall be presumed regulated and abated as such, or sampled and analyzed before the work that would disturb them.
3.2.4Bulk ACM samples shall be analyzed by polarized light microscopy (PLM) with point counting for results near the 1% regulatory threshold.
3.2.5Paint and coatings shall be tested for lead by XRF in place or by laboratory analysis of bulk samples.
3.2.6Caulk, sealant, and glazing-compound samples shall be analyzed for PCB concentration by laboratory method before any window-replacement or facade work in buildings constructed or renovated before 1980.
NOTE Pre-1980 curtain-wall and window assemblies are a recurring PCB blind spot: glazing compounds and perimeter caulk in these assemblies frequently exceed the 50 ppm TSCA threshold, and discovering that mid-project halts the window contractor and triggers a TSCA compliance crisis. (3.3)
NOTE A material is asbestos-containing when it contains more than 1% asbestos by PLM; a coating is lead-based paint at 1.0 mg/cm² by XRF or 0.5% (5,000 ppm) by laboratory analysis; caulk or sealant is TSCA-regulated PCB material at 50 ppm or greater. (3.4)
● Full pre-demolition quantitative survey (NESHAP, all regulated materials)
○ Renovation-area survey limited to affected materials
○ Bulk sampling of identified suspect materials only
☐ Friable ACM (thermal system insulation, fireproofing, plaster)
☐ Non-friable ACM (floor tile, mastic, roofing, transite)
☐ Lead-based paint / lead-coated components
☐ PCB caulk, sealant, or glazing compound
☐ Mercury-containing equipment (incidental)
☐ PCB lamp ballasts (incidental)
● Required for all results between 0.25% and 2%
○ Required only on Owner request
4 Regulatory Notification
NOTE NESHAP notification is a hard, non-negotiable prerequisite: enforcement attaches to the missing notice itself, independent of whether the abatement is performed correctly. (4.1)
NOTE The NESHAP quantity trigger is met when regulated ACM reaches 260 linear feet on pipes, 160 square feet on other components, or 35 cubic feet off-pipe — any one threshold met brings the entire renovation or demolition under NESHAP. (4.2)
4.2.1The Contractor shall submit written NESHAP notification to the EPA or delegated state agency at least 10 working days before the start of any regulated renovation or demolition.
4.2.2Notification shall be filed whenever the quantity of regulated ACM meets or exceeds any one of the NESHAP thresholds, and for all demolitions regardless of ACM quantity where the jurisdiction requires it.
4.2.3The Contractor shall obtain and maintain all applicable state and local abatement permits before mobilizing.
4.2.4Where an emergency renovation operation qualifies under the NESHAP imminent-hazard exception, the Contractor shall document the emergency and notify the agency as soon as practicable.
NOTE Demolition and renovation also trigger separate state asbestos-project and lead-project notifications in most jurisdictions; the federal NESHAP notice does not satisfy them. (4.3)
● Abatement Contractor files and maintains copies
○ General Contractor files on behalf of project
○ Owner files directly
1030
Default: 10 working days
5 Submittals
5.1 Action Submittals
5.1.1The Contractor shall submit the following action submittals for review before mobilizing on site:
- Asbestos, lead, and PCB abatement work plans, each describing methods, sequence, and engineering controls
- Negative-pressure enclosure design and air filtration unit (AFU) sizing calculations
- Worker protection program: respiratory protection program, medical surveillance and fit-test records, and exposure-assessment plan
- Decontamination unit (DCU) layout and waste-handling plan
- Project schedule showing abatement, clearance, and demolition sequencing with clearance float
- Encapsulant or enclosure product data where encapsulation or enclosure is proposed
☐ Asbestos / lead / PCB abatement work plans
☐ Negative-pressure enclosure and AFU sizing
☐ Worker protection / respiratory / medical surveillance program
☐ Decontamination unit and waste-handling plan
☐ Abatement-to-demolition schedule with clearance float
☐ Encapsulant / enclosure product data
5.2.1The Contractor shall submit the following informational submittals:
- State asbestos and lead abatement contractor licenses and EPA firm certifications
- Supervisor (competent person) and worker certifications and training records
- Industrial Hygienist / CIH qualifications where third-party monitoring is contractor-arranged
- Disposal facility permits and acceptance letters for each regulated waste stream
☐ State abatement licenses and EPA firm certifications
☐ Supervisor and worker certifications / training records
☐ Industrial Hygienist / CIH qualifications
☐ Disposal facility permits and waste acceptance letters
5.3 Closeout Submittals
5.3.1The Contractor shall submit the following closeout submittals before the area is released for demolition or reoccupancy:
- Daily air monitoring logs (personal and area) for the duration of the work
- Visual clearance inspection reports per ASTM E1368
- PCM and, where required, TEM air clearance results
- Lead dust-wipe clearance results from an NLLAP-certified laboratory
- Signed waste manifests and disposal certificates for each regulated waste stream
- Project closeout package consolidating all clearance and disposal documentation
☐ Daily personal and area air monitoring logs
☐ Visual clearance inspection reports (ASTM E1368)
☐ PCM / TEM air clearance results
☐ Lead dust-wipe clearance results (NLLAP lab)
☐ Signed waste manifests and disposal certificates
☐ Consolidated project closeout package
6 Quality Assurance
NOTE Two distinct qualified roles govern an abatement project, and conflating them is a compliance gap: the Owner's Certified Industrial Hygienist (CIH) performs the survey and independent third-party monitoring, while the Contractor's competent person (CP) supervises the work from inside the abatement organization. (6.1)
NOTE Independent air monitoring is the structural safeguard of the project: for Class I asbestos work most jurisdictions require monitoring by a party other than the abatement contractor, so that the entity certifying clearance is not the entity paid to finish the work. (6.2)
6.2.1The abatement Contractor shall hold current state asbestos and lead abatement licenses and the applicable EPA firm certifications.
6.2.2The Contractor shall designate a competent person, certified and trained per 29 CFR 1926.1101 and 29 CFR 1926.62, present whenever regulated work is in progress.
6.2.3The Owner shall retain an independent Industrial Hygienist or CIH, contracted separately from the abatement Contractor, to perform third-party air monitoring and clearance for all Class I asbestos work.
6.2.4Lead abatement (permanent hazard elimination) shall be performed only by an EPA-certified lead abatement firm and certified abatement workers under 40 CFR 745 Subpart L.
6.2.5Lead-safe interim work under the RRP Rule shall be performed only by a certified renovation firm using certified renovators under 40 CFR 745 Subpart E.
NOTE Abatement and the RRP Rule are legally distinct and must never be conflated in scope: abatement permanently eliminates the lead hazard and requires a certified abatement firm, while RRP is an interim lead-safe work practice by a certified renovator — specifying one and licensing for the other creates a liability and licensing gap. (6.3)
NOTE Worker fit-testing, medical surveillance, and exposure monitoring are not paperwork to be assumed away: OSHA requires these records to be created and retained for 30 years for asbestos and for the duration of employment plus 40 years for lead, and the Owner must confirm the Contractor operates the program rather than presuming it exists. (6.4)
6.4.1The Contractor shall maintain respirator fit-test, medical surveillance, and exposure-monitoring records for each worker for the retention period required by 29 CFR 1926.1101 and 29 CFR 1926.62.
● Owner-retained independent CIH (required for Class I asbestos)
○ Contractor-arranged independent IH
○ Contractor self-monitoring (permitted only where state allows and no Class I work)
7 Asbestos Work Classification
NOTE OSHA sorts asbestos construction work into four classes by what is being disturbed, and the class determines the required engineering controls, containment, and respiratory protection — picking the class is the first technical decision on every asbestos scope. (7.1)
NOTE Class I is removal of friable thermal system insulation and surfacing ACM and carries the highest controls; Class II is removal of non-friable ACM such as floor tile, mastic, and roofing; Class III is repair and maintenance that disturbs ACM; Class IV is housekeeping and cleanup of ACM debris. (7.2)
7.2.1Friable ACM removal shall be performed as Class I work under full negative-pressure enclosure unless a compliant alternative isolation method is approved in the work plan.
7.2.2Non-friable ACM removal shall be performed as Class II work using wet methods; dry removal of non-friable ACM is prohibited.
7.2.3Class III repair and Class IV housekeeping shall employ wet methods, HEPA vacuuming, and the respiratory protection indicated by exposure assessment.
NOTE Encapsulation is compliant only where the ACM will remain in place and intact: friable ACM scheduled for demolition cannot be encapsulated in lieu of removal, because demolishing encapsulated friable ACM still requires NESHAP-compliant removal first. (7.3)
☐ Class I — friable ACM removal (negative-pressure enclosure)
☐ Class II — non-friable ACM removal (wet method)
☐ Class III — repair / maintenance disturbing ACM
☐ Class IV — housekeeping / debris cleanup
● Full removal, wet method
○ Encapsulation (intact, non-friable, remaining in place)
○ Enclosure (durable barrier over ACM remaining in place)
● Bridging encapsulant (elastomeric barrier coating)
○ Penetrating encapsulant
8 Containment and Engineering Controls
NOTE Containment level scales with the asbestos work class and the quantity disturbed: a full negative-pressure enclosure for friable Class I removal, a glove-bag for isolated pipe-insulation runs, and critical barriers with a mini-enclosure for non-friable Class II work. (8.1)
NOTE Negative pressure is the engineering control that keeps fibers inside the enclosure and out of the occupied building, and it must be verified continuously, not assumed. (8.2)
8.2.1Class I friable ACM removal shall be performed within a sealed enclosure of polyethylene sheeting maintained under negative pressure relative to surrounding occupied areas.
8.2.2The enclosure shall be maintained at a minimum differential of −0.02 in. w.g. (−5 Pa), monitored continuously with a recording Magnehelic gauge.
8.2.3Air filtration units shall provide a minimum of 4 air changes per hour through HEPA filtration, exhausted outside the occupied envelope.
8.2.4Glove-bag removal may be used for ACM pipe and fitting insulation in limited-access runs in lieu of full enclosure where permitted by the work class and quantity.
8.2.5Non-friable Class II work shall be isolated with critical barriers and, where indicated, a mini-enclosure, with polyethylene sheeting on horizontal surfaces and continuous HEPA vacuuming.
8.2.6A three-chamber personnel decontamination unit — equipment room, shower, and clean room — shall be provided at each Class I enclosure entry.
NOTE Negative-pressure enclosures in occupied buildings must preserve required fire egress and comply with NFPA 1 temporary-construction provisions; sealing an enclosure must never block a required exit path. (8.3)
8.3.1Negative-pressure enclosures shall maintain required means of egress and comply with NFPA 1 provisions for temporary construction in occupied buildings.
● Full negative-pressure enclosure with HEPA AFUs
○ Glove-bag isolation (limited-access pipe runs)
○ Mini-enclosure with critical barriers
○ Critical barriers only (Class II non-friable)
-0.05-0.02
Default: -0.02 in. w.g.
● Three-chamber field-constructed (equipment / shower / clean)
○ Modular pre-fabricated three-chamber unit
9 Worker Protection
NOTE Respirator selection is driven by air monitoring, not preference: OSHA defines an initial-exposure tier when no data exist, then escalates protection as monitored fiber and lead concentrations rise. (9.1)
NOTE The asbestos permissible exposure limit is 0.1 f/cc as an 8-hour TWA with a 1.0 f/cc 30-minute excursion limit; the lead PEL is 50 µg/m³ as an 8-hour TWA with a 30 µg/m³ action level that triggers medical surveillance and blood-lead monitoring. (9.2)
9.2.1Respiratory protection shall be selected from exposure-assessment results and shall provide an assigned protection factor adequate for the monitored concentration.
9.2.2Class I asbestos work with no prior exposure data shall default to a half-face air-purifying respirator with HEPA P100 filters (APF 10) minimum.
9.2.3Full-face air-purifying respirators (APF 50) shall be used where PCM results exceed 1 f/cc.
9.2.4Powered air-purifying or supplied-air respirators (APF up to 1000) shall be used where airborne concentration exceeds 10 times the PEL.
9.2.5Workers shall be enrolled in medical surveillance and biological (blood-lead) monitoring whenever lead exposure reaches or exceeds the 30 µg/m³ action level.
● Half-face APR, HEPA P100 (APF 10)
○ Full-face APR (APF 50)
○ PAPR / supplied-air (APF up to 1000)
☐ PEL 0.1 f/cc, 8-hr TWA
☐ Excursion limit 1.0 f/cc, 30-min
10 Lead Abatement
NOTE The lead work approach is a goal-driven choice: full abatement permanently eliminates the hazard and suits commercial renovation and demolition prep, while lead-safe RRP practices are an interim measure where the disturbance is below the abatement threshold and the goal is precaution rather than elimination. (10.1)
NOTE Lead removal methods all share one rule — control the dust — whether by hand-scraping, low-temperature heat, or chemical stripping, each followed by HEPA vacuuming and wet wiping. (10.2)
10.2.1Lead paint shall be removed by hand-scraping, heat application below 1100°F, or chemical stripping, followed by HEPA vacuuming and wet wiping of all affected surfaces.
10.2.2Chemical strippers shall be methylene-chloride-free and NMP-free in compliance with the applicable EPA rule.
10.2.3Open-flame burning, uncontrolled abrasive blasting, and power sanding without HEPA capture of lead paint are prohibited.
10.2.4Post-abatement lead dust-wipe clearance shall be sampled and analyzed by an NLLAP-certified laboratory.
NOTE The lead dust-wipe clearance levels are the 2024 HUD/EPA values — floors no greater than 10 µg/ft², interior window sills no greater than 100 µg/ft², and window troughs no greater than 400 µg/ft²; the floor limit was reduced from 40 to 10 µg/ft² and the current value must be used. (10.3)
● Full abatement (permanent hazard elimination, certified abatement firm)
○ Lead-safe interim practices (RRP Rule, certified renovator)
☐ Hand-scraping with HEPA capture
☐ Heat application below 1100°F
☐ Chemical stripping (methylene-chloride-free, NMP-free)
100250
Default: 100 µg/ft²
400400
Default: 400 µg/ft²
11 PCB Caulk and Sealant Abatement
NOTE PCB-containing caulk and sealant removal under TSCA is self-implementing: the contractor prepares an abatement plan, removes the material with continuous dust capture, and routes the waste to an approved facility — there is no agency pre-approval, only a documented procedure the contractor must follow correctly. (11.1)
NOTE The concentration determines the obligation: caulk or sealant at 50 ppm or greater is fully TSCA-regulated, material at 2 to 50 ppm is treated as low-concentration PCB, and material below 2 ppm is non-regulated. (11.2)
11.2.1PCB-containing caulk and sealant shall be removed by mechanical means — oscillating multi-tool or chisel — with continuous HEPA-vacuum capture at the point of removal.
11.2.2Adjacent porous substrate contaminated by PCB migration shall be removed or remediated to the extent identified by the survey.
11.2.3PCB waste shall be containerized in labeled drums segregated by concentration class and disposed of at a RCRA-permitted or PCB-approved disposal facility.
11.2.4Open-flame or high-heat methods that volatilize PCBs shall not be used for caulk or sealant removal.
● 50 ppm or greater (fully TSCA-regulated)
○ 2 to 50 ppm (low-concentration PCB)
○ Below 2 ppm (non-regulated)
● Mechanical removal with continuous HEPA capture
○ Mechanical removal plus contaminated-substrate excision
12 Waste Packaging, Transport, and Disposal
NOTE Each regulated waste stream has its own packaging, labeling, manifest, and disposal-facility requirements, and they cannot be combined: a single shared dumpster for asbestos, lead, and PCB debris is non-compliant for all three. (12.1)
NOTE Lead-painted demolition debris is a frequent illegal-disposal trap: debris may fail the Toxicity Characteristic Leaching Procedure (TCLP) and require RCRA-permitted disposal, so assuming standard construction-and-demolition disposal without testing risks an illegal-disposal violation. (12.2)
12.2.1Asbestos waste shall be wetted, double-bagged in 6-mil polyethylene or placed in leak-tight containers, and labeled per 40 CFR 61.150 and 29 CFR 1926.1101 with the required asbestos danger warning.
12.2.2Lead-contaminated debris shall be TCLP-tested to determine whether it is RCRA-hazardous; debris that fails TCLP shall be disposed of at a RCRA-permitted facility.
12.2.3PCB waste shall be packaged and manifested separately and disposed of at a facility approved for the applicable PCB concentration class.
12.2.4Each regulated waste stream shall be transported under its own manifest by a permitted hauler, and signed manifests and disposal certificates shall be returned to the closeout package.
12.2.5Regulated waste streams shall not be commingled in transport or disposal containers.
● Double-bagged 6-mil polyethylene, labeled
○ Leak-tight rigid containers, labeled
● TCLP test, then route by result (RCRA or C&D landfill)
○ RCRA-permitted facility by default (no TCLP test)
☐ Asbestos waste shipment record (40 CFR 61.150)
☐ Lead / RCRA hazardous waste manifest (where TCLP fails)
☐ PCB waste manifest (40 CFR 761)
13 Air Monitoring and Clearance
NOTE Clearance is what converts an abated area into a released area, and the analytical method chosen — PCM or TEM — trades cost and speed against definitiveness. (13.1)
NOTE PCM clearance is faster and less expensive but counts all fibers without distinguishing asbestos; TEM is definitive, identifies asbestos specifically, and is required in some jurisdictions and for AHERA-style clearance. (13.2)
13.2.1Personal and area air monitoring shall be conducted daily for the duration of regulated asbestos work.
13.2.2A visual clearance inspection per ASTM E1368 shall be performed and passed before any clearance air sampling.
13.2.3Final asbestos air clearance inside containment shall achieve less than 0.01 f/cc by PCM, or less than 70 asbestos structures/mm² by TEM where TEM clearance is required.
13.2.4Containment shall not be removed until visual clearance and air clearance have both passed.
13.2.5A final visual inspection, and TEM clearance where required by jurisdiction or the work plan, shall be performed after containment removal.
● PCM (less than 0.01 f/cc)
○ TEM (less than 70 structures/mm²)
○ PCM with TEM confirmation
0.0050.01
Default: 0.01 f/cc
☐ Visual inspection (ASTM E1368) before air sampling
☐ Air clearance inside containment
☐ Containment removal after both pass
☐ Final visual / TEM after containment removal
14 Sequencing and Coordination
NOTE Abatement and demolition are sequential, not concurrent, on the materials that overlap: abatement must be complete and cleared before demolition disturbs those materials, and the schedule must carry float for the case where clearance fails and re-abatement is needed. (14.1)
NOTE The most common general-contractor coordination failure is mobilizing the demolition contractor with no buffer behind abatement: a single clearance failure then cascades into a demolition delay because there is no float between abatement completion and demo mobilization. (14.2)
14.2.1The project schedule shall sequence abatement completion and clearance ahead of demolition in each work area, with explicit float for re-abatement after a clearance failure.
14.2.2The demolition contractor shall not mobilize into an area until that area's clearance documentation has been issued and accepted.
14.2.3Incidental regulated materials identified by the survey — mercury equipment, PCB ballasts, and refrigerant-charged equipment — shall be segregated and routed to the appropriate disposal or recovery scope, coordinated with Selective Electrical Demolition where applicable. 210
Default: 3 working days
● Phased occupation with verified negative-pressure isolation
○ Full evacuation of affected area
15 Project Decontamination and Closeout
NOTE Closeout on an abatement project is a documentation deliverable as much as a physical one: the area is not truly closed until every clearance and disposal record exists in one package, because that package is the Owner's defense in any future regulatory or liability inquiry. (15.1)
15.1.1Surfaces within and adjacent to each abatement area shall be HEPA-vacuumed and wet-wiped before clearance.
15.1.2All temporary enclosures, barriers, and decontamination units shall be removed and disposed of as regulated waste.
15.1.3The Contractor shall deliver a consolidated closeout package containing the abatement plans, negative-pressure logs, daily air monitoring records, visual and air clearance reports, lead dust-wipe results, and all signed waste manifests and disposal certificates.
15.1.4The closeout package shall be retained by the Owner for the records-retention period required by applicable regulation.
☐ HEPA-vacuum and wet-wipe of all surfaces
☐ Removal of enclosures, barriers, and DCUs as regulated waste
☐ Consolidated closeout package delivered to Owner
16 Warranty
NOTE Abatement warranty is narrow by nature — the work is removal, not an installed product — so it warrants completeness, compliance, and the integrity of the documentation rather than long-term material performance. (16.1)
16.1.1The Contractor shall warrant that all regulated materials within the defined scope were removed or treated in compliance with the referenced regulations and that the area passed all required clearances.
16.1.2The Contractor shall warrant that all regulated waste was disposed of at permitted facilities as evidenced by the returned manifests and disposal certificates.
16.1.3Where encapsulation or enclosure was performed in lieu of removal, the Contractor shall warrant the encapsulant or enclosure system per the manufacturer's published warranty and ASTM E1494 performance.
☐ Compliant removal / treatment of all in-scope materials
☐ Passing clearance for all abated areas
☐ Permitted disposal evidenced by manifests
☐ Encapsulant / enclosure system warranty (where applicable)