Category: Agency Playbook

Asbestos and hazmat abatement generates the highest emissions per unit of material removed of any restoration job type. The combination of specialized transportation to licensed disposal facilities, extreme PPE consumption, and high-emissions disposal methods (including incineration for some regulated materials) produces an emissions profile that is fundamentally different from standard C&D work. This guide provides the emission factors, calculation methodology, and a worked example for a commercial ACM abatement project.

Regulated Materials: Classification Before Calculating

Category 4: Transportation Emission Factors

Hazmat abatement transportation has two components with fundamentally different emission profiles: crew and equipment mobilization (standard restoration factors) and regulated waste transportation (elevated factors due to distance to licensed facilities and loaded vehicle weight).

Licensed disposal facility distance note: Licensed hazmat landfills capable of receiving friable ACM are significantly less common than standard C&D landfills. Average transport distance to a licensed ACM facility is 45–90 miles in most US metro areas, compared to 10–25 miles for standard C&D. Use actual haul distances from your waste manifests. If unavailable, use 60 miles as the default for ACM waste and 80 miles for PCB/high-hazard waste.

Category 1: Materials Emission Factors

PPE consumption rate for hazmat abatement: Unlike standard restoration where PPE may last a full shift, hazmat abatement requires full PPE replacement each time a worker exits the work area through the decontamination unit. A standard 8-hour ACM abatement shift with 3 exits per worker produces 3 complete PPE kit replacements per worker. For crew of 4: 4 workers × 3 exits × 1.8 kg/kit = 21.6 kg CO2e in PPE alone per day.

Category 5: Waste Emission Factors

Complete Worked Example: Pre-1970 Commercial Office Building, Floor Tile and Ceiling Tile ACM Abatement

Job profile: 5,000 sq ft floor tile removal (non-friable ACM, 9″ floor tiles) and 5,000 sq ft suspended ceiling tile replacement (non-friable ACM) in a 1967 office building being renovated. No pipe insulation abatement in scope. Crew: 4 abatement technicians, 8-day project. Air monitoring by third-party IH (not in contractor scope). Facility: 28 miles from job site. Licensed C&D landfill with ACM cell: 54 miles from job site.

Category 4 — Transportation

Crew vehicles: 2 light trucks × 56 mi RT × 9 trips (8 work days + equipment pickup) = 504 mi × 0.503 = 254 kg CO2e

Decontamination unit (trailer): 1 × 56 mi × 2 trips = 112 mi × 1.084 = 121 kg CO2e

Negative air / HEPA equipment trailer: 1 × 56 mi × 2 trips = 112 mi × 1.084 = 121 kg CO2e

ACM waste haul (non-friable floor + ceiling tiles, 2 loads): 2 × 108 mi RT to licensed facility × 3.20 kg/mi = 691 kg CO2e

Category 4 total: 1,187 kg CO2e = 1.19 tCO2e

Category 1 — Materials

PPE (Level C, 4 workers × 8 days × 3 exits/day = 96 kit replacements): 96 × 1.8 kg = 173 kg CO2e

P100 respirator cartridges: 4 workers × 8 days × 1 replacement/day = 32 pairs × 0.8 = 26 kg CO2e

6-mil poly sheeting (double-layer containment, 500 sq ft decon area + staging): 200 m² × 1.10 kg/m² = 220 kg CO2e

HEPA filters (4 negative air machines × 2 changes/day × 8 days = 64 filters): 64 × 3.2 = 205 kg CO2e

Wetting agent for tile removal (applied to floor tiles before removal): 5,000 sq ft × 0.003 L/sq ft = 15 liters × 1.4 = 21 kg CO2e

ACM disposal bags (33-gallon, for ceiling tile bagging): estimated 80 bags × 0.55 = 44 kg CO2e

Category 1 total: 689 kg CO2e = 0.69 tCO2e

Category 5 — Waste

Floor tiles (non-friable ACM, 5,000 sq ft × 4 lbs/sq ft = 10 tons): 10 × 0.28 = 2.80 tCO2e

Ceiling tiles (non-friable ACM, 5,000 sq ft × 1.5 lbs/sq ft = 3.75 tons): 3.75 × 0.28 = 1.05 tCO2e

Spent PPE (hazmat-grade, 96 kit replacements + misc): estimated 0.8 tons × 0.30 = 0.24 tCO2e

Decontamination wastewater (~800 liters over 8 days): 800 × 0.000272 = 0.22 kg CO2e (negligible)

Category 5 total: 4.09 tCO2e

Category 12 — Demolished Hazardous Building Materials

For ACM floor and ceiling tiles, the material itself is the hazardous waste — it flows to Category 5 disposal accounting. Category 12 is not separately calculated for ACM materials that are classified as hazardous waste upon removal, since the disposal emissions are already captured in Category 5. This is a key distinction from standard demolition: ACM materials do not generate both Category 5 and Category 12 emissions — they generate Category 5 only.

Category 12 total: 0 tCO2e (ACM materials classified as regulated waste at removal — captured in Category 5)

Job Total

Key observation: For hazmat abatement, Category 5 waste disposal is the dominant emission source at 68% of total — confirming that reduction strategies for this job type should focus on waste minimization (reducing the volume of regulated material requiring licensed disposal) rather than fleet or materials optimization. In practice, this means accurate pre-abatement survey to confirm material quantities precisely, minimizing unnecessary demolition scope, and pursuing licensed recycling options for non-friable ACM where available.

Asbestos-Containing Materials in Landfill: Zero Methane — A Critical Correction

The emission factors for ACM disposal in the Category 5 table include a transport premium over EPA WARM but implicitly apply WARM’s underlying methane generation assumptions. For asbestos-containing materials, this is incorrect. Asbestos is a mineral silicate — it is inorganic and will not biodegrade in a landfill under any conditions. ACM disposal generates zero landfill methane.

The applicable emission factors for ACM disposal are therefore limited to:

• Transportation to the licensed facility (Category 4, already calculated separately)
• Landfill equipment operation at the disposal site (negligible, accounted for in WARM’s non-biodegradable material factors)

The corrected disposal emission factors for ACM, based on inert material treatment rather than C&D composite factors:

The transport factor of ~0.018 tCO₂e/ton is derived from EPA’s assumed 1.8 gallons diesel per short ton for C&D haul transport (10.21 kg CO₂e/gallon × 1.8 = 18.4 kg CO₂ = 0.018 tCO₂e/ton). Actual transport emissions should be calculated from documented haul distances. The significantly lower disposal factor reflects the correct classification of asbestos as an inert material rather than a decomposable C&D composite.

NESHAP thresholds for regulatory reference: EPA NESHAP (40 CFR 61.145) requires notification when a demolition or renovation project disturbs 160 square feet, 260 linear feet, or 35 cubic feet of Regulated Asbestos-Containing Material (RACM). Below these thresholds, disposal may proceed without NESHAP notification. ACM waste carries DOT Class 9 designation, UN ID #2212, regardless of quantity.

Lead-Based Paint Waste: Residential RCRA Exemption Clarified

The Category 5 table applies a uniform hazardous waste disposal factor for lead paint debris. This overstates emissions for the most common lead abatement scenario in restoration work.

Residential lead-based paint waste is exempt from RCRA hazardous waste classification regardless of lead concentration, under the RCRA household waste exemption (42 U.S.C. §6901; EPA Final Rule, 68 FR 36487, June 18, 2003). This applies to all renovation, repair, and painting work in residential structures, including investment properties and apartments. Lead paint chips, dust, and blasting waste from residential work go to standard C&D or MSW landfills at standard disposal emission factors — not licensed hazardous waste facilities.

Non-residential lead abatement requires TCLP testing. The RCRA hazardous waste threshold for lead is 5.0 mg/L (D008 waste code). Paint chips and blasting waste from commercial structures frequently exceed this threshold and require licensed hazardous waste disposal at approximately 250–600 kg fossil CO₂ per tonne (Zero Waste Europe, hazardous waste incineration range). Whole-building demolition debris with LBP attached to substrates may pass TCLP if lead is diluted in the substrate mass.

Corrected lead waste emission factors by context:

Decontamination Shower Water: Quantified

OSHA 29 CFR 1926.1101(j) mandates a three-stage decontamination unit (Equipment Room → Shower Room → Clean Room) for all regulated asbestos abatement work. Decontamination shower water represents a measurable but typically minor wastewater emission source.

At standard shower flow rates of 2.0–2.5 GPM with 3–5 minute showers, each decontamination cycle consumes approximately 7.5–12.5 gallons per worker per cycle. Workers shower at lunch and end-of-shift, producing 15–25 gallons per worker per day. A 4-person crew over a 5-day project generates approximately 300–500 gallons of decontamination shower water.

Decon water from non-hazardous LBP projects discharges to municipal sewer after filtration through ≥5.0 micron filtration (required in NY, PA, CT). At the wastewater treatment energy factor of 0.00074 kg CO₂e per gallon, 400 gallons of decon water produces approximately 0.30 kg CO₂e — negligible in the context of total job emissions but documented here for methodological completeness. For PCB or mercury decontamination water, specialized treatment or drumming for permitted disposal may be required.

PPE Weight and Consumption Data: Corrected

The Category 1 table uses kit-level EPA EEIO estimates for PPE. More precise data is now available for the primary components.

DuPont Tyvek 400 coveralls (the standard for asbestos and lead abatement work) weigh approximately 180 grams per suit (HDPE flash-spun fabric at 1.2 oz/sq-yd). Workers typically use two suits per day during active abatement — one changed at lunch, one at end-of-shift. A 4-person crew over a 5-day project consumes 40–80 Tyvek suits (7.2–14.4 kg of HDPE). At an HDPE production factor of 1.8–3.5 kg CO₂e/kg, coveralls alone contribute 13–50 kg CO₂e per project. This is substantially lower than the EPA EEIO apparel manufacturing proxy of 1.2 kg CO₂e per suit implied by the current table.

Nitrile gloves: 0.0277 kg CO₂e per glove (Top Glove 2024 SATRA-verified LCA). Per pair: 0.055 kg CO₂e. This is lower than the 0.3 kg CO₂e/pair EPA EEIO proxy by approximately 82%.

N95 respirators: 0.05 kg CO₂e per unit (Springer Environmental Chemistry Letters, 2022). This is lower than the EPA EEIO medical equipment proxy values in current use.

Use these LCA-sourced per-unit values in place of the EPA EEIO kit factors for contractors seeking to maximize data quality for SBTi-committed or CSRD-exposed clients.

Mold remediation has a different emissions signature than water damage or fire restoration — it is slower, more materials-intensive per square foot, and dominated by chemical treatments and containment infrastructure rather than vehicle transportation. This guide provides the emission factors, calculation methodology, and a complete worked example for a Condition 3 commercial mold remediation.

Job Classification Before Calculating

Category 4: Transportation Emission Factors

Mold remediation typically involves more crew trips relative to equipment trips than fire or water jobs — the slower pace means daily crew mobilization across an extended project without proportionally heavy equipment deployment.

Category 1: Materials Emission Factors

Mold remediation is the most materials-intensive restoration job type per square foot of affected area. Containment infrastructure, biocidal treatments, and HEPA filtration media represent significant Category 1 emissions even on smaller jobs.

Biocide application rate proxies by condition and surface type: Condition 3 porous surfaces (drywall, wood framing) — 0.020 liters/sq ft for first application, 0.015 liters/sq ft for second application. Non-porous surfaces — 0.008 liters/sq ft. HVAC duct interiors — 0.012 liters/linear ft.

Containment materials proxy: Standard containment setup for a single affected room uses approximately 50 linear feet of 6-mil poly at ceiling height (8 ft average) = 120 m² of sheeting. Add 20 m² per additional doorway or penetration. Reusable zipper doors amortize over approximately 20 uses before replacement.

Category 5: Waste Emission Factors

Category 12: Demolished Building Materials

Complete Worked Example: Condition 3 Commercial Mold — Server Room and Adjacent Office

Job profile: HVAC condensate leak caused active mold growth behind drywall in a server room (200 sq ft) and adjacent office (300 sq ft). Total affected area: 500 sq ft. Scope: containment setup, demolition of all affected drywall (both rooms) and insulation (server room only), biocide treatment, HEPA vacuuming, clearance prep. No HVAC duct work in scope. Duration: 5 days. Crew: 2 technicians. Facility: 19 miles from job site.

Category 4 — Transportation

Crew van: 1 cargo van × 38 mi RT × 6 trips (5 work days + equipment pickup) = 228 mi × 0.503 = 115 kg CO2e

Equipment delivery (negative air machines): 1 × 38 mi × 2 trips = 76 mi × 1.084 = 82 kg CO2e

Debris removal (one load, dump truck): 1 × 22 mi × 2.25 = 50 kg CO2e

Category 4 total: 247 kg CO2e = 0.25 tCO2e

Category 1 — Materials

Biocide (first application — 500 sq ft porous surfaces): 500 × 0.020 = 10 L × 2.8 = 28 kg CO2e

Biocide (second application): 500 × 0.015 = 7.5 L × 2.8 = 21 kg CO2e

Encapsulant (server room only, non-porous surfaces): 2 gallons × 4.2 = 8 kg CO2e

6-mil poly sheeting: 2 rooms × 120 m² each = 240 m² × 0.55 = 132 kg CO2e

Zipper doors (2 rooms × 2 doors, reusable at 20-use amortization): 4 × 1.8/20 = 0.4 kg CO2e (negligible)

HEPA filters (2 negative air machines × 2 filter changes): 4 × 3.2 = 13 kg CO2e

HEPA vacuum bags: 10 bags × 0.4 = 4 kg CO2e

PPE: 2 tech × 5 days × 2 Tyvek = 20 × 1.2 = 24 kg; gloves: 2 × 5 × 4 = 40 pairs × 0.3 = 12 kg; respirator cartridges: 2 × 5 × 1 pair = 10 × 0.8 = 8 kg. PPE: 44 kg CO2e

Category 1 total: 250 kg CO2e = 0.25 tCO2e

Category 5 — Waste

Mold-contaminated drywall (500 sq ft × 2.5 lbs/sq ft = 1,250 lbs = 0.57 tons): 0.57 × 0.18 = 0.10 tCO2e

Server room insulation (200 sq ft × 1.5 lbs/sq ft = 300 lbs = 0.14 tons): 0.14 × 0.33 = 0.05 tCO2e

Spent HEPA filters (4 filters × 2 lbs each = 8 lbs = 0.004 tons): 0.004 × 0.28 = 0.001 tCO2e (negligible)

PPE and containment disposal (~0.06 tons): 0.06 × 0.25 = 0.015 tCO2e

Category 5 total: 0.17 tCO2e

Category 12 — Demolished Materials

Drywall demolished (500 sq ft): 0.57 tons × 0.16 = 0.09 tCO2e

Fiberglass insulation (server room, 200 sq ft): 0.14 tons × 0.33 = 0.05 tCO2e

Category 12 total: 0.14 tCO2e

Job Total

Key observation from this example: Category 1 (materials) and Category 4 (transportation) are nearly equal at 0.25 tCO2e each — confirming that mold remediation has a more balanced emissions profile than water or fire jobs where transportation typically dominates. This means reduction strategies that focus on materials (lower-emission biocide formulations, reusable containment systems) have comparable impact to fleet electrification for this job type.

Negative Air Machine Energy Consumption: Model-Specific Data

The Category 1 table above uses a single HEPA filter factor and generic equipment values. Negative air machines (NAMs) are the dominant energy consumer in mold containment and their wattage varies dramatically across models at similar CFM ratings. Use model-specific data where available; use the weighted average proxy where it is not.

RCP proxy for NAMs where model is unspecified: 1,500W / 36 kWh per 24-hour day (weighted average across the above models). At the national grid emission factor (0.3499 kg CO₂e/kWh), a single NAM running 24 hours generates approximately 12.6 kg CO₂e per day. A large commercial remediation running four NAMs continuously for 10 days produces roughly 504 kg CO₂e from containment energy alone — a meaningful emission source that should be documented in equipment runtime records rather than left as a proxy.

HEPA filter note: HEPA filters in NAMs are single-use and non-cleanable. Manufacturer recommendations call for replacement when differential pressure exceeds 2.6 inches W.C. on high speed (Nikro NCF1800 spec) or approximately every 6–12 months under normal use. During active mold remediation with high spore loads, replacement frequency increases. Standard HEPA filter dimensions for 2,000 CFM machines are 16″ × 24″ × 11.5″. Log filter changes at the job level for accurate Category 1 accounting.

Mold-Contaminated Debris: Waste Classification Confirmed

Mold waste is not regulated at any level — federal or state — regardless of IICRC S520 contamination condition. The University of Florida Environmental Health and Safety states plainly: mold-contaminated material is not regulated and can be disposed of as regular waste. Condition 3 materials (actively colonized porous materials) must be physically removed and double-bagged in sealed 6-mil polyethylene per IICRC S520 protocol, but disposal occurs in standard MSW or C&D landfills without special permitting or manifest requirements.

Florida, Texas, New York, and California all lack special disposal requirements for mold-remediation waste. The sole exception applies when mold co-occurs with regulated materials: if Condition 3 remediation uncovers asbestos or lead, those materials are governed by their own regulatory frameworks and require separate handling and disposal.

The Scope 3 implication: Standard EPA WARM v16 landfill emission factors apply to all mold remediation debris. There is no regulatory category requiring hazardous waste incineration, permitted treatment facilities, or elevated disposal factors for mold waste. Do not apply contamination premiums to mold waste disposal emission calculations.

Desiccant vs. Refrigerant Dehumidifier: Corrected Energy Factor

The Category 1 table does not distinguish between refrigerant-based (compressor) and desiccant dehumidifiers. For mold remediation in cold environments — unheated crawl spaces, winter deployments, structures with disrupted HVAC — desiccant units are the only viable option below approximately 50°F (10°C). Their energy consumption per pint of moisture removed is substantially higher than the refrigerant default.

For any mold job where desiccant dehumidifiers are deployed, use the 0.50–0.80 kWh/pint range rather than the standard refrigerant factor. Document dehumidifier type in job equipment records. The difference is not trivial: a desiccant unit running at 0.65 kWh/pint generates approximately 2–3× the equipment energy emissions of an equivalent-capacity LGR unit on the same job.

Antifungal Treatment Emission Factors: Updated and Corrected

Borax-Based Treatments

Borax (sodium tetraborate) has published lifecycle assessment data from a peer-reviewed MDPI Sustainability study (2022, 14(3), 1787): borax anhydrous carries a GWP of approximately 495 kg CO₂e per functional unit, with steam during refinement contributing 46% of the total impact. The per-kg figure requires verification against the study’s functional unit declaration, but the borax production process is energy-intensive relative to its inorganic simplicity, driven by mining, drying, and purification operations. The EPA EEIO inorganic chemical proxy of 1.1 kg CO₂e/kg currently in the table is a reasonable approximation pending manufacturer-specific EPD data. Flag as estimated.

Tea Tree Oil and Botanical Treatments

Tea tree oil (Melaleuca alternifolia) carries no published lifecycle emission factor as of April 2026. Essential oil production is energy-intensive: steam distillation yields are approximately 1–2% of raw plant material by weight, meaning roughly 50–100 kg of plant material is processed per kg of oil extracted. Combined with agricultural inputs, transport, and distillation, the production footprint is estimated at 15–50 kg CO₂e per kg of tea tree oil — substantially higher per kg than synthetic biocides, though applied in much smaller quantities. The RCP treats tea tree oil treatments as a data gap. Apply the EPA EEIO chemical manufacturing proxy (2.8 kg CO₂e/liter of diluted product) and flag as estimated pending manufacturer disclosure.

Copper-Based Fungicides

Copper production averages approximately 2.6 tonnes CO₂e per tonne of copper (peer-reviewed industry average). Copper sulfate processing adds further energy overhead. Estimated emission factor for copper sulfate fungicide treatments: 3–5 kg CO₂e/kg. Apply where copper-based treatments are used and flag as estimated. No EPA-specific factor exists for copper sulfate in the WARM or EF Hub databases.

Fire and smoke restoration generates the most variable Scope 3 emissions of any restoration job type. A contained single-room smoke job and a multi-floor structural fire with hazmat abatement and full reconstruction can both appear on your P&L as “fire restoration” — but their emissions differ by a factor of 20 or more. This guide gives you the emission factors, the calculation methodology, and a complete worked example to produce an accurate per-job figure regardless of where on that spectrum your job falls.

Job Classification: Phase and Scope

Before calculating, identify which phases are in your scope of work and document them separately. Emissions from mitigation and reconstruction phases should be tracked separately even if invoiced together — they may occur in different reporting years.

Category 4: Transportation Emission Factors

Fire restoration deploys more vehicle types per job than any other restoration category. Account for each separately.

Content pack-out note: Pack-out is frequently the second-largest transportation source on large fire jobs. Track pack-out truck trips separately from crew mobilization and debris removal trips. Pack-out involves loaded trucks going to storage and returning empty — apply loaded emission factor for outbound, unloaded for return.

Category 1: Materials Emission Factors

Reconstruction phase materials — installed building components: If your scope includes reconstruction, the embodied carbon of installed materials belongs in Category 1. Use these EPA EEIO factors: drywall $0.42 per board foot × board feet; dimensional lumber $0.55 per board foot; paint and primer $4.2 per gallon. For complex reconstruction, request embodied carbon data from your materials supplier or use the Athena Impact Estimator for buildings as a secondary source.

Category 5: Waste Emission Factors

ACM identification rule: If the building was constructed before 1980 and your demolition scope touches floor tiles, ceiling tiles, pipe insulation, or joint compound, assume ACM until tested. Apply the ACM emission factor (0.38 tCO2e/ton) to all potentially ACM-containing demolition waste in buildings where testing was not completed before demolition. Document the assumption in your data quality notes.

Category 12: Demolished Building Materials

Complete Worked Example: Commercial Suite Fire — Single Floor

Job profile: Kitchen fire in a 3,200 sq ft commercial restaurant. Scope: smoke damage treatment throughout, selective demolition of kitchen (800 sq ft, including drywall, ceiling tiles, hood system). No ACM (post-1985 building). Reconstruction not in contractor scope. Pack-out of kitchen equipment. Crew: 4 technicians, 6 days. Facility: 31 miles from job site.

Category 4 — Transportation

Crew trucks: 2 light trucks × 62 mi RT × 8 trips (6 work days + mobilization + equipment pickup) = 992 mi × 0.503 = 499 kg CO2e

Equipment trailer (air scrubbers, ozone gen): 1 × 62 mi × 2 trips = 124 mi × 1.084 = 134 kg CO2e

Pack-out truck (kitchen equipment): 1 loaded trip × 62 mi = 62 mi × 2.25 + 1 return trip × 62 mi × 1.612 = 140 + 100 = 240 kg CO2e

Debris dump truck: 2 loads to transfer station × 18 mi × 2.25 kg/mi = 81 kg CO2e

Category 4 total: 954 kg CO2e = 0.95 tCO2e

Category 1 — Materials

Chemical sponges: 3,200 sq ft ÷ 50 sq ft/sponge = 64 sponges × 0.15 kg = 10 kg CO2e

Encapsulant/smoke blocking primer (kitchen surfaces): 12 gallons × 4.2 kg/gallon = 50 kg CO2e

Thermal fogging agent: 6 liters × 2.1 kg/L = 13 kg CO2e

HEPA filters replaced: 3 air scrubbers × 2 filter changes = 6 × 3.2 kg = 19 kg CO2e

PPE: 4 technicians × 6 days × 1.5 Tyvek/day = 36 × 1.2 kg = 43 kg; gloves: 4 × 6 × 3 pairs = 72 × 0.3 = 22 kg; respirator cartridges: 4 × 6 × 1 pair = 24 × 0.8 = 19 kg. PPE total: 84 kg CO2e

Category 1 total: 176 kg CO2e = 0.18 tCO2e

Category 5 — Waste

Kitchen demolition debris (drywall, ceiling tiles, hood components): estimated 2.8 tons × 0.16 tCO2e/ton = 0.45 tCO2e

PPE and consumables waste: ~0.08 tons × 0.25 = 0.02 tCO2e

Category 5 total: 0.47 tCO2e

Category 12 — Demolished Materials

Kitchen drywall (800 sq ft): 0.91 tons × 0.16 = 0.15 tCO2e

Acoustic ceiling tiles: 800 sq ft × 1.8 lbs/sq ft = 0.65 tons × 0.12 = 0.08 tCO2e

Category 12 total: 0.23 tCO2e

Job Total

Charred and Fire-Damaged Wood Debris: A Critical Correction to Standard Landfill Factors

The standard EPA WARM v16 landfill emission factor for wood debris assumes significant anaerobic decomposition and methane generation in landfill. For fire-damaged and charred structural wood, this assumption is materially incorrect and overstates emissions.

Peer-reviewed measurement studies have established that actual carbon conversion in landfilled wood is 0–19.9% (average ~5%), compared to the IPCC default DOC degradation factor of 50% (Barlaz et al., 2011, Environmental Science & Technology; O’Dwyer et al., 2018, Waste Management). For charred and pyrolyzed wood — the specific material type generated in fire restoration — the correction is even more dramatic. Charring converts cellulose and hemicellulose into stable aromatic carbon structures (chars and graphene-like materials) that are highly resistant to microbial decomposition. Charred wood debris disposed in a landfill produces near-zero methane.

The practical implication for RCP calculations: When calculating Category 5 and Category 12 emissions for fire-damaged structural wood, use the following corrected factors rather than the standard EPA WARM wood debris value:

For RCP calculations, use 0.010 tCO₂e per short ton as the default for fire-damaged wood debris when charring is visually confirmed. Document the char condition in the job notes. This correction can meaningfully reduce reported Category 5 and Category 12 emissions on structural fire jobs — in some cases by 60–80% on the wood debris component.

Odor Elimination Equipment: Energy and Emission Data

The Category 1 table above assigns nominal values to ozone and hydroxyl generators. Actual manufacturer specifications reveal a significant difference between the two technologies that affects both emission calculation and equipment selection decisions.

Ozone Generators

Commercial ozone generators used in smoke remediation draw far less power than their effectiveness suggests. The Queenaire QT Hurricane — one of the most widely used units in the industry — operates at 52 watts (0.5A at 120V), covering up to 16,000 sq ft and producing up to 1,600 mg/hr of ozone. Over a typical 24-hour treatment cycle, a single unit consumes only 1.25 kWh. A whole-house treatment using two or three units over two to three days totals approximately 7.5–11.25 kWh. At the national grid emission factor, this yields less than 4 kg CO₂e per treatment — negligible relative to transportation and debris disposal.

Hydroxyl Radical Generators

Hydroxyl generators are a different energy profile. The Odorox Boss draws 230 watts maximum (1.9A at 120V) and treats 1,500–2,500 sq ft. Unlike ozone, hydroxyl generators run continuously while crews are present (safe for occupied spaces during treatment), typically operating three to seven days continuously on larger fire jobs. A single Odorox Boss running five days continuously consumes 27.6 kWh. Multiple units on a commercial job or residential whole-house treatment reach 55–110 kWh per job — a meaningful Domain 1 contribution that should be logged in equipment runtime records.

Updated proxy values replacing EPA EEIO equipment embodied carbon factors:

Blasting Media: Corrected Emission Factors

Sodium Bicarbonate (Soda Blasting)

The EPA EEIO chemical manufacturing proxy previously applied to soda blast media significantly understates the actual production footprint. Per a 2019 study in Industrial & Engineering Chemistry Research (Lee et al., KAIST), the Solvay soda ash carbonation process yields approximately 1.69 tonnes CO₂ per tonne NaHCO₃ with full upstream accounting. A simplified proxy via direct carbonation captures 0.32 kg CO₂ per kg. The RCP default for sodium bicarbonate blasting media is 0.5–0.7 kg CO₂e/kg pending manufacturer-specific Environmental Product Declaration data.

Dry Ice Blasting: Corrected Accounting

The FAQ entry above states that CO₂ released during dry ice blasting is included in the production emission factor. This requires a clarification. If the CO₂ used to produce the dry ice is sourced from an industrial byproduct stream — the typical case for commercial dry ice production — only the liquefaction and solidification energy represents a net Scope 3 emission. The sublimated CO₂ itself is not newly generated. Liquefaction adds approximately 39 kWh per tonne of CO₂ processed. At the national grid factor, this adds 13.7 kg CO₂e per tonne of dry ice for energy overhead. The RCP default of 0.85 kg CO₂e/kg remains appropriate as a conservative aggregate estimate but should be updated with supplier-specific data where available.

Generator Fuel: Reference Table for Large Fire Jobs

Extended fire restoration jobs on properties with disrupted electrical service require temporary generator power. Generator fuel consumption is a direct Category 4 emission source and frequently the largest single emission contributor on multi-week structural fire projects.

Source: Hardy Diesel Generator Fuel Consumption Chart; diesel combustion factor 10.21 kg CO₂e/gallon (EPA 2025 EF Hub).

Scale illustration: A typical 20 kW diesel generator running at 75% load for 10 hours per day over a three-week fire restoration project consumes approximately 273 gallons of diesel, producing roughly 2,782 kg CO₂. On a large structural fire job, generator emissions frequently exceed demolition debris disposal as the second-largest emission source after vehicle transportation. Log generator fuel receipts and daily runtime at the job level.

Sources and References — Fire and Smoke Technical Additions

• Barlaz, M.A. et al. (2011). “Is Current Bioreactor Landfill Technology Sustainable?” Environmental Science & Technology 45(16).
• O’Dwyer, T.F. et al. (2018). “Methane generation from wood waste in landfills.” Waste Management 76.
• Lee, S. et al. (2019). “Technoeconomic and Environmental Evaluation of Sodium Bicarbonate Production Using CO₂.” Industrial & Engineering Chemistry Research. ACS Publications.
• Hardy Diesel. Diesel Generator Fuel Consumption Chart. hardydiesel.com
• Queenaire Technologies. QT Hurricane Product Specifications. ozoneexperts.com
• Odorox Boss Product Specifications. Aramsco. aramsco.com

This guide is the working document for calculating Scope 3 greenhouse gas emissions from water damage mitigation jobs under the Restoration Carbon Protocol. It contains the actual emission factors, the calculation methodology for each Scope 3 category, and a complete worked example from a real job type. A contractor who follows this guide will produce a per-job carbon figure that is defensible in a third-party ESG audit.

Job Classification: Why It Matters Before You Calculate

Your emissions total will vary by a factor of 10 or more depending on water category and drying class. Before calculating, classify the job correctly using IICRC S500 definitions:

Category 4: Transportation Emissions

Transportation is typically the largest or second-largest emission source on water damage jobs. Calculate every vehicle separately.

Emission Factors (EPA Mobile Combustion, 2024)

Calculation formula: Vehicle miles × emission factor = kg CO2e. Convert to tCO2e by dividing by 1,000.

What counts as “vehicle miles”: Round-trip distance from your facility or previous job to the loss site, multiplied by the number of trips. Include equipment pickup trips, progress check visits, and equipment retrieval trips. Do not include the vehicle miles of subcontractors — their emissions are captured in their own RCP calculation.

Category 1: Materials Emissions

Emission Factors for Common Water Damage Materials

Note on antimicrobial volumes: If you don’t track liters applied per job, use these application rate proxies: Cat 2 jobs — 0.015 liters per sq ft of affected area. Cat 3 jobs — 0.025 liters per sq ft (double application typically required).

Category 5: Waste Emissions

Emission Factors by Waste Type and Disposal Method

Estimating waste weight when you don’t have disposal receipts: Use 2.5 lbs per sq ft of demolished drywall (standard 1/2″ drywall), 3.0 lbs per sq ft of demolished flooring (carpet + pad), 0.8 lbs per sq ft of demolished wood subfloor. For Cat 3 contaminated water: estimate from extractor tank fill cycles × tank capacity.

Category 12: Demolished Building Materials

Important: Negative values for wood-based materials reflect carbon storage credits under EPA WARM methodology — lumber and hardwood store carbon that is not immediately released when landfilled. Apply these credits only if the material is being landfilled rather than incinerated.

Complete Worked Example: Category 2, Class 3 Commercial Water Loss

Job profile: Washing machine supply line failure, 2,400 sq ft commercial office, second floor. Affected area includes cubicle space and server room (contents moved). Required demolition: 800 sq ft drywall, 600 sq ft carpet. Crew: 2 technicians, 3-day mitigation. Your facility is 24 miles from the job site.

Category 4 — Transportation

2 light trucks × 48 miles round trip × 4 trips (initial, day 2, day 3, equipment pickup) = 384 vehicle-miles
384 × 0.503 kg CO2e/mile = 193 kg CO2e

1 equipment trailer (dehumidifiers, air movers) × 48 miles × 2 trips (drop-off + pickup) = 96 vehicle-miles
96 × 1.084 kg CO2e/mile = 104 kg CO2e

1 dump truck for debris × 14 miles to transfer station × 1 trip = 14 vehicle-miles
14 × 2.25 kg CO2e/mile = 32 kg CO2e

Equipment power source: building electrical supply (Scope 2 — property owner, not included here)

Category 4 total: 329 kg CO2e = 0.33 tCO2e

Category 1 — Materials

Quaternary ammonium antimicrobial: 2,400 sq ft × 0.015 L/sq ft = 36 liters × 2.8 kg CO2e/L = 101 kg CO2e

PPE: 2 technicians × 3 days × 2 Tyvek suits/day = 12 suits × 1.2 kg = 14 kg; 2 × 3 × 4 glove pairs = 24 pairs × 0.3 kg = 7 kg; 2 × 3 × 2 N95 = 12 respirators × 0.4 kg = 5 kg. PPE total: 26 kg CO2e

HEPA filter replacement (2 air scrubbers, 1 filter change each): 2 × 3.2 kg = 6 kg CO2e

Category 1 total: 133 kg CO2e = 0.13 tCO2e

Category 5 — Waste

C&D debris (wet materials, Cat 2 contaminated): estimated 1.2 tons (800 sq ft drywall at 2.5 lbs/sq ft = 1,000 lbs; carpet remnants ~400 lbs)
1.2 tons × 0.18 tCO2e/ton = 0.22 tCO2e

Disposable PPE and consumables: ~0.05 tons × 0.25 tCO2e/ton = 0.01 tCO2e

Category 5 total: 0.23 tCO2e

Category 12 — Demolished Building Materials

800 sq ft drywall demolished: 800 × 2.5 lbs = 2,000 lbs = 0.91 tons × 0.16 tCO2e/ton = 0.15 tCO2e

600 sq ft carpet + pad: 600 × 3.0 lbs = 1,800 lbs = 0.82 tons × 0.33 tCO2e/ton = 0.27 tCO2e

Category 12 total: 0.42 tCO2e

Job Total

This figure — 1.11 tCO2e — is what goes in the Category 4, 1, 5, and 12 rows of the RCP Job Carbon Report delivered to the property manager. The spend-based estimate for a $28,000 job like this (using EPA Services to Buildings factor of approximately 0.10 kg CO2e per dollar) would produce 2.8 tCO2e — more than 2.5x the actual calculated figure. This is why primary data matters.

Antimicrobial and Chemical Emission Factors: Updated Methodology

The EPA EEIO chemical manufacturing factor used in the Category 1 table above is an economic input-output proxy — useful for estimation but not sourced to the actual chemistry. The following replaces or supplements those values where peer-reviewed lifecycle data now exists.

Hydrogen Peroxide-Based Antimicrobials

H₂O₂ is the only restoration antimicrobial with published lifecycle assessment data. The anthraquinone auto-oxidation production process yields 1.33 kg CO₂e per kg of active H₂O₂ (ACS Omega, 2025); the ecoinvent European market average is 1.79 kg CO₂e per kg based on eight producers. For diluted restoration products (typically 3–7.5% concentration), the per-liter emission scales proportionally. A gallon of 7.5% H₂O₂ antimicrobial contains approximately 0.28 kg of active ingredient, yielding roughly 0.37–0.50 kg CO₂e per gallon of diluted product — substantially lower than the EPA EEIO proxy of 1.9 kg CO₂e/liter previously used. Update your calculations accordingly.

Quaternary Ammonium Compounds (QACs)

No cradle-to-gate lifecycle assessment has been published for quaternary ammonium compound production as of April 2026. QACs are petrochemical-derived surfactants manufactured via chloromethane reactions with tertiary amines. The EPA EEIO factor of 2.8 kg CO₂e/liter remains the only available proxy. Flag all QAC calculations as EPA EEIO estimated in the data_quality section of any RCP Job Carbon Report delivered to clients facing SBTi or CSRD verification requirements. The RCP will update this factor when manufacturer-specific LCA data becomes available.

Botanical Antimicrobials (Thymol-Based Products)

Products such as Benefect Decon 30 (thymol active ingredient) carry USDA BioPreferred certification and UL EcoLogo status but no published LCA emission factor as of April 2026. Essential oil distillation is energy-intensive with extremely low extraction yields (1–2% from plant material). The RCP treats botanical antimicrobials as a data gap requiring manufacturer EPD documentation. In the absence of manufacturer data, apply the QAC proxy (2.8 kg CO₂e/liter) and flag as estimated.

Truck-Mounted Extraction Unit: Fuel Consumption Reference Data

Truck-mounted extraction units operate on dedicated gasoline or diesel engines separate from the vehicle drivetrain. The fuel consumed during extraction operations is a direct Domain 2 Category 4 emission source. Manufacturer specifications and field-reported consumption rates:

RCP proxy for truck mount extraction: 1.0 gallon gasoline per hour of extraction unit operation (8.9 kg CO₂ per hour). A 4-hour extraction job on a standard truckmount generates approximately 35.5 kg CO₂ from the unit alone — independent of the vehicle transportation emissions calculated in Domain 2. Log extraction start/stop times in the job record.

Capture actual fuel consumption from fuel receipts where possible. Where runtime-only is documented, apply the proxy. Flag as proxy in the data_quality section.

Refrigerant Considerations: LGR Dehumidifiers and Fugitive Emissions

Commercial LGR dehumidifiers contain refrigerant charges that are potential Scope 3 emission sources if units are serviced, recharged, or have fugitive leaks. This is not a required RCP data point in v1.0 but is disclosed here for methodological completeness and for contractors with SBTi-committed clients.

Refrigerant Charge Data by Unit Type

The Dri-Eaz LGR 6000i is the first major restoration dehumidifier using R-32, a refrigerant with a GWP of 771 under IPCC AR6 — representing a 63–67% reduction in refrigerant climate impact compared to R-410A units. This is relevant for the RCP Carbon Reduction Playbook: equipment replacement cycles that prioritize R-32 or R-454B (GWP ~530) units over R-410A materially reduce the fugitive emission exposure of a restoration fleet.

Fugitive emission screening: The EPA default annual leak rate for sealed hermetic refrigeration equipment (residential/commercial A/C) is 10% of charge capacity. For a Dri-Eaz Revolution LGR with 0.60 kg R-410A at the 10% screening rate, the annual fugitive contribution would be 0.06 kg × 2,256 GWP = 135 kg CO₂e per unit per year. Actual leak rates for sealed hermetic dehumidifier compressors are likely 1–5% annually. Contractors are not required to calculate refrigerant emissions under RCP v1.0 but should document unit refrigerant type for RCP v1.1 compliance.

Wastewater Extraction: Methodological Note

Extracted water discharged to municipal sanitary sewer generates indirect emissions at the wastewater treatment facility. Based on Metropolitan Water Reclamation District energy intensity data (Elevate Energy, 2018), the national average wastewater treatment energy intensity is approximately 1,978 kWh per million gallons treated, yielding 0.00074 kg CO₂e per gallon discharged at the national grid emission factor. A typical water damage extraction of 500–2,000 gallons produces only 0.37–1.48 kg CO₂e for wastewater treatment — under 0.5% of total job emissions on most jobs. The RCP excludes this source from required calculation in v1.0 but acknowledges it here for methodological completeness and CSRD-grade reporting contexts.