Untreated western redcedar sawn shingles, at mill gate

1. Scope and Applicability

This PCR covers untreated western redcedar (Thuja plicata) shingles sawn on both faces from shingle roundwood or prepared bolts, graded and packaged at the mill gate without intentional drying. It applies to an electrically powered dry mechanical route, including electric material handling; no onsite combustion, log pond, wet processing, gluing, coating or preservation is included. Actual dispatch moisture is a measured qualifier, not a fixed definition of green wood. Intentional air/kiln drying and treated products require separately supported methodology. Sources: usda-shingle-roofs-2011; usda-wood-handbook-2021.

Sawn shingles, straight/taper-split shakes and handsplit-resawn shakes can share moisture measurement and balance principles, but not a pooled production inventory. Shingle sawing generates kerf sawdust and trim; splitting has split rejects and grain-dependent yield, and resawing adds another kerf. Tapersawn shakes also differ in geometry and grade. Measure these streams rather than assuming one route has a fixed lower loss or energy demand. Split/resawn/tapersawn shakes are excluded here; no ordinary lumber UUID may identify the finished shingle. Source: usda-shingle-roofs-2011.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.other-transportable-goods-except-metal-products-machinery-and-equipment.products-of-wood-cork-straw-and-plaiting-materials.shingles-and-shakes-made-out-of-wood
classification_refs	CPC 3.0 31624; narrower
covered_products	Untreated Thuja plicata sawn shingles of a declared grade, as-sawn mill-gate state
excluded_products	Split/resawn/tapersawn shakes; other species; intentionally dried, impregnated, fire-retardant, coated, glued or composite products; lumber; installed roof or wall
representative_product	A measured lot of sawn western redcedar shingles; grade and tapered dimensions declared
production_route	Receive roundwood or prepared bolts; conditional buck/debark; sawing/tapering/edging; grade; incidental holding; package; segregate residues
market_state	Untreated finished shingles at mill gate, not installed; packaging separately accounted

3. Reference Flow

Field	Value
What	Supply manufactured shingles for subsequent roof/wall cladding selection
How much	1 kg accepted net finished shingles at measured dispatch moisture
How well	Declared species, grade, grain/heartwood class, tapered dimensions and untreated state; no universal code suitability
How long or cycle	One manufacturing delivery; service life requires a separate installation, exposure and maintenance scenario
reference_flow_link	shingle_out

Field	Value
Reference amount	1
Reference product flow	Shingles and shakes made out of wood 10eb6989-64ab-406a-9ce6-8d9e97da896e
Reference flow property	Mass 93a60a56-a3c8-11da-a746-0800200b9a66
Reference unit group	93a60a57-a4c8-11da-a746-0800200c9a66
Reference unit	kg
Required qualifiers	Thuja plicata; sawn-shingle route; dimensions/taper; grade and grain/heartwood; untreated/no intentional drying; dispatch moisture dry basis; net mass excludes packaging; source location/year; roundwood versus purchased-bolt start; gross piece area versus declared coverage/overlap layout; kg/m2 measured conversion; residue outlets

Required qualifiers must be declared in dataset metadata or equivalent fields. The broad verified finished-product flow contains this narrower shingle subset, but supplies no measured quantity or usable background dataset. Its Chinese database display is retained literally; the physical product definition remains sawn shingles. Missing qualifiers make a dataset reference incomplete.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
net_basis	shingle_out	Mass	kg	Weigh net accepted wood at dispatch with cp_output; keep dry-basis moisture, gross shipment and packaging mass distinct. Every inventory row is per 1 kg reference flow.
moisture_basis	roundwood_in; bolt_in; shingle_out; chip_out; sawdust_out; bark_out	Mass	kg	Use cp_wood and cp_output matched samples; dry-basis u = water mass / oven-dry wood mass. Do not use a wet-basis percentage in the same equation. Source: usda-wood-handbook-2021.
area_basis	shingle_out	Mass and area	kg; m2	Measure kg/m2 for the same grade, moisture and layout using cp_area. Separate summed full piece-face area, overlapped material area and unique installed coverage. Manufacturing mass is not an installed-service functional unit.
chip_volume	chip_out	Volume	m3	Use cp_residue; explicitly match measured solid or bulk volume, moisture, packing and receiving dataset reference; unknown convention blocks linkage.
pm_bins	pm_fine; pm_middle; pm_coarse	Mass	kg	One method/time/control boundary; disjoint bins only. Total PM and PM10 are verification totals, not extra additive rows. Source: epa-sawmill-pte-2014.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Untreated western redcedar roundwood at mill receipt, or prepared debarked bolts replacing it
starting_condition_role	Purchased precursor; not a finished-shingle recursive input
product_classification_scope	CPC 3.0 31624; narrower
recursive_input_rule	In-house returned shingles/rework circulate inside mill; count net external exchanges once. Purchased finished shingles are excluded from this manufacturing route
upstream_dataset_requirement	Compatible wood procurement/forestry, any bolt preparation, transport and electricity/material datasets required; disclose species, geography, moisture and allocation. UUID is not dataset evidence
disclosure	Foreground gate-to-gate; upstream links expand to cradle-to-gate. External treatment tracked without importing combustion into foreground. Installation, use, maintenance and end-of-life excluded

One aggregated mill process covers preparation, sawing, grading, handling and packaging. Keep separate stage meters and physical transfer records: each internal link has identical quantity and state at both ends, and cancels from the external inventory. No second finished-shingle output is created for a packaging handoff. Include residue chipping when actually performed, auxiliary electricity, maintenance consumables, packaging losses and actual releases. Missing applicable chemical/waste/emission species require another atomic card and compatible identity before dataset completion.

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
mill	Sawn shingle mill	required	Declared untreated electric dry mechanical route	Aggregated foreground process; stages remain separately measured	shingle_out: 1 kg

Process: Sawn shingle mill (mill)

Inputs

Product flows

Roundwood of coniferous wood, other (roundwood_in)

Untreated Thuja plicata roundwood intended for shingles, received with bark. Include roadside-to-mill transport in its upstream link; do not substitute ordinary sawlogs excluded by this flow definition. Purchased bolts replace the relevant incoming wood; never count the same wood twice.

• Selected flow: Roundwood of coniferous wood, other 3dbbedd2-fb9d-478e-a4b4-4a76a4d97804
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_wood
• Sources: usda-wood-handbook-2021

Shingle bolts (bolt_in)

Conditional purchased debarked and cut shingle bolts. Use the verified prepared-bolt state, with upstream preparation and delivery included. In-house bolts are internal stage transfers within this aggregated mill process, not a second external input.

• Selected flow: Shingle bolts 35615328-322c-4a39-98c9-254d980275ef
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_wood
• Sources: usda-wood-handbook-2021; usda-shingle-roofs-2011

Alternating current (electricity_in)

Meter grid-average low-voltage AC below 1 kV, including bucking, sawing, extraction fans, electric handling and packaging. Match supply voltage, region, year and losses. Preserve the reference Net calorific value property in MJ; measured kWh converts by 3.6, not by combustion efficiency.

• Selected flow: Alternating current 50657322-939c-4829-a87b-47c093bfa6a7
• Flow property / unit: Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66 / MJ
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_energy
• Sources: corrim-northern-lumber-2025

Lubricating oil (oil_in)

Conditional petroleum-fraction machinery lubricant matching the selected record, including its 40.5 MJ/kg calorific qualifier. Supplier compatibility remains a dataset prerequisite; that metadata is not a PCR amount or conversion default. Synthetic oils require a separate compatible identity.

• Selected flow: Lubricating oil 66628f20-9d33-4997-bd6c-6357453fa268
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material
• Sources: corrim-northern-lumber-2025

Polyethylene film (film_in)

Conditional polyethylene wrapping film; measure net consumption by inventory reconciliation and identify grade. Exclude PET and other polymers.

• Selected flow: Polyethylene film e64eb06c-6dc9-45f1-b003-3dc6c44b27e2
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_pack
• Sources: corrim-northern-lumber-2025

Kraft wrapping paper (paper_in)

Conditional kraft wrapping paper or paper label stock; record coating and adhesive separately if present. Finished paper bags are not this paper-stock input.

• Selected flow: Kraft wrapping paper
• Flow property / unit: Mass / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_pack
• Sources: corrim-northern-lumber-2025

Polypropylene packaging strap (strap_in)

Conditional finished polypropylene packaging strap, with measured composition and mass. Polymer resin, textile twine and steel band are not substitutes.

• Selected flow: Polypropylene packaging strap
• Flow property / unit: Mass / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_pack
• Sources: corrim-northern-lumber-2025

Outputs

Product flows

Shingles and shakes made out of wood (shingle_out)

Accepted sawn western redcedar shingles leaving the mill, untreated and without intentional drying; net wood mass includes the measured dispatch moisture but excludes packaging. This is the only quantitative reference output.

• Selected flow: Shingles and shakes made out of wood 10eb6989-64ab-406a-9ce6-8d9e97da896e
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: 1 kg
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_output
• Sources: usda-shingle-roofs-2011; usda-wood-handbook-2021

Wood Chip (chip_out)

Conditional separately chipped untreated western redcedar offcuts sold as a coproduct. Keep actual chip mass and moisture for balances. The flow reference is Volume/m3: measure volume state, packing and density against the receiving background reference; unspecified solid/bulk convention makes the link pending. Do not convert using species-table density.

• Selected flow: Wood Chip 3fa2a6a7-224c-4d99-bd55-a214f0a83161
• Flow property / unit: Volume 93a60a56-a3c8-22da-a746-0800200c9a66 / m3
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_residue
• Sources: usda-wood-handbook-2021; corrim-northern-lumber-2025; cssb-cedar-lca-2007

Untreated western redcedar sawdust, coproduct (sawdust_out)

Conditional segregated untreated western redcedar sawdust sold as a coproduct, including recovered saw dust. Exclude chips, planer shavings, mixed hog fuel and discarded sawdust.

• Selected flow: Untreated western redcedar sawdust, coproduct
• Flow property / unit: Mass / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_residue
• Sources: corrim-northern-lumber-2025; cssb-cedar-lca-2007

Western redcedar bark, coproduct (bark_out)

Conditional segregated western redcedar bark sold as a coproduct; do not identify it by a waste-only bark flow.

• Selected flow: Western redcedar bark, coproduct
• Flow property / unit: Mass / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_residue
• Sources: corrim-northern-lumber-2025

Waste flows

Offcut (offcut_waste)

Untreated western redcedar solid trim and rejected shingles discarded off site; excludes separately inventoried bark, sawdust and saleable chips. Link actual waste treatment, and disclose contamination.

Only actual non-agglomerated, untreated and unglued coarse wood offcuts belong to this row; keep moisture and recipient records, and verify their physical state and receiver/provider compatibility before treatment linkage. Do not substitute agglomerated fuel or captured powder.

• Selected flow: Offcut acc22294-8e77-4784-988f-2499be3c60eb
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_residue
• Sources: corrim-northern-lumber-2025

Bark (bark_waste)

Debarking residue disposed of as waste rather than sold. This is mutually exclusive with bark_out for the same physical mass; purchased debarked bolts do not generate fictitious in-house bark.

• Selected flow: Bark a2536c07-fbe1-4a12-90fb-21bd2e99b74e
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_residue
• Sources: corrim-northern-lumber-2025

sawdust waste (sawdust_waste)

Discarded untreated sawdust sent to the combustion/recovery route specified by this waste identity; confirm actual receiver. Landfill or incompatible treatments require a different exact identity. The same mass cannot also be sawdust_out or emitted particulate.

• Selected flow: sawdust waste e1a44d20-d968-4d64-bd7c-253a1441ab35
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_residue
• Sources: corrim-northern-lumber-2025; epa-sawmill-pte-2014

Used lubricating oil (oil_waste)

Used lubricant leaving the mill. Reconcile addition, retained machinery stock, recovered oil and documented loss; specify actual downstream treatment without assuming regeneration.

• Selected flow: Used lubricating oil 55d93375-7f04-4166-b2a2-88ce929051a5
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material
• Sources: corrim-northern-lumber-2025

Unwashed waste polyethylene wrapping film (film_waste)

Polyethylene wrapping-film scraps generated at the mill, if present. This is unwashed waste at generation, not cleaned recycling-plant material; downstream packaging waste after sale is outside this gate.

• Selected flow: Unwashed waste polyethylene wrapping film
• Flow property / unit: Mass / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_pack
• Sources: corrim-northern-lumber-2025

waste paper (unspecified) (paper_waste)

Conditional kraft-paper packaging scraps. The broad waste-paper identity contains this subset only when free of incompatible coatings and contamination; require receiver-specific treatment.

• Selected flow: waste paper (unspecified) f140a5a2-5318-4d06-956f-a87b9c6fda25
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_pack
• Sources: corrim-northern-lumber-2025

Polypropylene packaging strap cuttings (strap_waste)

Conditional polypropylene strap cuttings at generation; do not use a mechanical-recycling-route identity before proving that route.

• Selected flow: Polypropylene packaging strap cuttings
• Flow property / unit: Mass / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_pack
• Sources: corrim-northern-lumber-2025

Elementary flows

particles (PM2.5) (pm_fine)

Actual particles at or below PM2.5 emitted to outdoor air, unspecified subcompartment, from mechanical operations and residue handling. Measure after controls, include fugitives, and use mutually exclusive size bins; recovered dust is a residue, not an emission.

• Selected flow: particles (PM2.5) 08a91e70-3ddc-11dd-9293-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_air
• Sources: epa-sawmill-pte-2014

particles (PM2.5 - PM10) (pm_middle)

Actual particles above PM2.5 and at or below PM10 emitted to outdoor air, unspecified subcompartment, from mechanical operations and residue handling. Measure after controls, include fugitives, and use mutually exclusive size bins; recovered dust is a residue, not an emission.

• Selected flow: particles (PM2.5 - PM10) 08a91e70-3ddc-11dd-9501-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_air
• Sources: epa-sawmill-pte-2014

particles (> PM10) (pm_coarse)

Actual particles above PM10 emitted to outdoor air, unspecified subcompartment, from mechanical operations and residue handling. Measure after controls, include fugitives, and use mutually exclusive size bins; recovered dust is a residue, not an emission.

• Selected flow: particles (> PM10) fe0acd60-3ddc-11dd-a70a-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_air
• Sources: epa-sawmill-pte-2014

water vapour (water_vapour)

Actual moisture evaporated during incidental mill residence, emitted to outdoor air, unspecified. Reconcile wood-water stock; no intentional drying energy or universal moisture target is assumed.

• Selected flow: water vapour fe0acd60-3ddc-11dd-ac04-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_balance
• Sources: usda-wood-handbook-2021

carbon dioxide (biogenic) (biogenic_co2)

Conditional biogenic carbon dioxide emitted to outdoor air, unspecified, if measured biological storage losses occur. No onsite combustion is in scope. Retain actual LCI biogenic emissions regardless of a GWP convention; no carbon storage credit or automatic positive amount.

• Selected flow: carbon dioxide (biogenic) 08a91e70-3ddc-11dd-9c15-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_carbon
• Sources: corrim-northern-lumber-2025

methane (biogenic) (biogenic_ch4)

Conditional biogenic methane from demonstrated anaerobic storage degradation, emitted to outdoor air, unspecified. Document absence or quantify it; do not infer methane from normal green wood or transfer a combustion factor.

• Selected flow: methane (biogenic) fe0acd60-3ddc-11dd-a8e8-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_carbon
• Sources: corrim-northern-lumber-2025

methanol (methanol_air)

Conditional methanol specifically identified by sampling/speciation in mechanical processing or incidental storage, emitted to outdoor air, unspecified. Screening is required; the lumber survey supplies no cedar default. Unmeasured is unknown, not zero; add each additional identified chemical as a separate exact row.

• Selected flow: methanol fe0acd60-3ddc-11dd-a935-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_air
• Sources: corrim-northern-lumber-2025

formaldehyde (formaldehyde_air)

Conditional formaldehyde specifically identified by sampling/speciation in mechanical processing or incidental storage, emitted to outdoor air, unspecified. Screening is required; the lumber survey supplies no cedar default. Unmeasured is unknown, not zero; add each additional identified chemical as a separate exact row.

• Selected flow: formaldehyde 08a91e70-3ddc-11dd-941b-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_air
• Sources: corrim-northern-lumber-2025

pin-2(3)-ene (pinene_air)

Conditional pin-2(3)-ene (alpha-pinene) specifically identified by sampling/speciation in mechanical processing or incidental storage, emitted to outdoor air, unspecified. Screening is required; the lumber survey supplies no cedar default. Unmeasured is unknown, not zero; add each additional identified chemical as a separate exact row.

• Selected flow: pin-2(3)-ene 0a701083-c7e6-43d1-8ae5-e62050edc5dc
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measure this external exchange for the matched lot; divide its recorded total by P, the accepted net dispatched shingle mass in kg. Apply the allocation rule only to the environmental burden ledger.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_air
• Sources: corrim-northern-lumber-2025

7. Allocation and Co-product Handling

The CSSB preliminary summary reports cedar wood-chip and sawdust coproduct outlets, alongside mixed hog fuel, for its named shake/shingle products. This supports looking for separate saleable residues, not a universal waste percentage or interchangeable shake/shingle yield. Keep any actual mixed hog fuel separate from the pure bark/chip/sawdust rows. Source: cssb-cedar-lca-2007.

First assign separable operations directly: dedicated packaging belongs to shingles; dedicated chip processing belongs to chips. Partition genuinely shared burdens by measured oven-dry mass of saleable outputs at that stage; disclose the decision and test economic allocation sensitivity if prices or function indicate a materially different result. This adapts a documented lumber-study mass-allocation method, not its surveyed shares. Waste is not made a coproduct merely to reduce shingle burdens. Source: corrim-northern-lumber-2025.

Keep two ledgers. The physical process graph and mass/water/carbon balance retain full actual inputs, products, coproducts, wastes and releases. The allocated environmental burden ledger partitions eligible shared upstream burdens, energy and emissions. Do not multiply coproduct physical outputs or internal transfers by an allocation fraction. An allocated single-product dataset must bind the unallocated balance and its partition reconciliation; inventory cards describe the unallocated exchanges before that projection. No avoided-burden credit is automatic.

8. Foreground Data Collection, Calculation, and Quality Rules

Data Collection Protocols

protocol_id	process_id	flow_role	record_type	raw_fields	collection_method	unit	frequency	temporal_coverage	site_scope	aggregation_rule	quality_evidence
cp_output	mill	shingle_out	Matched records and measurements	lot; species; grade; grain; lengths; widths; taper; rejected mass; net accepted mass P; dispatch moisture; packaging tare	Calibrated scale with tare; immediate representative wood sampling for oven-dry mass stability, preserving volatile-extractive bias and species-calibrated meter limits.	kg	Each lot; emission tests cover each operating mode	Declared production period with all grade lots, stocks and shutdowns	Same mill, species and route; no pooled shake route	per 1 kg reference flow	Calibration; traceability; sampling plan; balance and uncertainty
cp_wood	mill	roundwood_in; bolt_in	Matched records and measurements	wood origin; species; starting state; delivery mass; bark; moisture samples; stock changes; transport; bolt preparation	Weigh receipts and reconcile opening/closing stock to the same accepted lot; do not double count internally prepared bolts. Sample wood and bark separately.	kg	Each lot; emission tests cover each operating mode	Declared production period with all grade lots, stocks and shutdowns	Same mill, species and route; no pooled shake route	per 1 kg reference flow	Calibration; traceability; sampling plan; balance and uncertainty
cp_energy	mill	electricity_in	Matched records and measurements	meter readings; stage hours; voltage; region/year; extraction and handling; supply reference	Submeter stages; reconcile main meter and shared service attribution. Convert metered kWh to MJ; retain meter and supplier definitions.	kWh; MJ	Each lot; emission tests cover each operating mode	Declared production period with all grade lots, stocks and shutdowns	Same mill, species and route; no pooled shake route	per 1 kg reference flow	Calibration; traceability; sampling plan; balance and uncertainty
cp_material	mill	oil_in; oil_waste	Matched records and measurements	product certificate; petroleum route; calorific qualifier; receipts; machinery stock; used-oil waste; loss; receiver	Reconcile weighed material additions and stock; weigh each waste separately; verify supplier/background compatibility without adopting calorific metadata as a default.	kg	Each lot; emission tests cover each operating mode	Declared production period with all grade lots, stocks and shutdowns	Same mill, species and route; no pooled shake route	per 1 kg reference flow	Calibration; traceability; sampling plan; balance and uncertainty
cp_pack	mill	film_in; paper_in; strap_in; film_waste; paper_waste; strap_waste	Matched records and measurements	component polymer/paper grade; coating/adhesive; receipts; stocks; shipped packaging; each scrap mass	Weigh each component and each scrap separately; reconcile consumed material = shipped packaging + on-site scraps + stock correction.	kg	Each lot; emission tests cover each operating mode	Declared production period with all grade lots, stocks and shutdowns	Same mill, species and route; no pooled shake route	per 1 kg reference flow	Calibration; traceability; sampling plan; balance and uncertainty
cp_residue	mill	chip_out; sawdust_out; bark_out; offcut_waste; bark_waste; sawdust_waste	Matched records and measurements	stream; source stage; sale/waste destination; wet and dry mass; moisture; chip volume; packing; measured density; receiver reference	Separate and weigh each outlet; track collected dust once. Measure chip volume and mass in the same state, document solid/bulk convention with supplier, and weigh dry samples for allocation.	kg; m3	Each lot; emission tests cover each operating mode	Declared production period with all grade lots, stocks and shutdowns	Same mill, species and route; no pooled shake route	per 1 kg reference flow	Calibration; traceability; sampling plan; balance and uncertainty
cp_air	mill	pm_fine; pm_middle; pm_coarse; methanol_air; formaldehyde_air; pinene_air	Matched records and measurements	species/CAS; outlet and fugitives; control state; test method; size cut; air flow; concentration; operating hours; detection limit; uncertainty	Use matched outlet sampling and validated fugitive estimates for actual operations; speciate VOCs. Integrate each species separately. Absent or below-detection results retain method and limit; unmeasured is unknown.	kg	Each lot; emission tests cover each operating mode	Declared production period with all grade lots, stocks and shutdowns	Same mill, species and route; no pooled shake route	per 1 kg reference flow	Calibration; traceability; sampling plan; balance and uncertainty
cp_balance	mill	water_vapour	Matched records and measurements	incoming/outgoing wood and bark water; residues; moisture; inventory; residence; volatile losses	Reconcile measured moisture and stocks over the matched lot; investigate closure before attributing unexplained mass loss to water.	kg	Each lot; emission tests cover each operating mode	Declared production period with all grade lots, stocks and shutdowns	Same mill, species and route; no pooled shake route	per 1 kg reference flow	Calibration; traceability; sampling plan; balance and uncertainty
cp_carbon	mill	biogenic_co2; biogenic_ch4	Matched records and measurements	dry stream masses; measured carbon fractions; biological loss evidence; residence; CO2 and CH4 species; stocks	Maintain a dry-wood carbon balance and measure/document actual biological releases or demonstrated absence; no combustion or carbon-neutrality assumption.	kg	Each lot; emission tests cover each operating mode	Declared production period with all grade lots, stocks and shutdowns	Same mill, species and route; no pooled shake route	per 1 kg reference flow	Calibration; traceability; sampling plan; balance and uncertainty
cp_area	mill	shingle_out	Matched records and measurements	matched lot mass; moisture; grade; per-piece face dimensions; exposure; gaps; courses; starter/ridge cuts; installed coverage; overlap; layout	Weigh and measure matched pieces and a documented test/specification layout; measure unique roof/wall plane coverage separately from summed full faces. Retain raw measurements and uncertainty.	kg; m2	Each lot; emission tests cover each operating mode	Declared production period with all grade lots, stocks and shutdowns	Same mill, species and route; no pooled shake route	per 1 kg reference flow	Calibration; traceability; sampling plan; balance and uncertainty

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
normalize_lot	all inventory rows	x = X / P; X is the measured external exchange for the matched lot, P is its accepted net dispatched shingle mass in kg; shingle_out = 1 kg. Physical outputs remain unallocated.	X; P; matched protocol; cp_output	x	usda-wood-handbook-2021
dry_wood	all wood streams	m_dry = m_wet / (1 + u); u = (m_wet - m_dry) / m_dry. Use matched state and a fraction, not percent.	m_wet; u; cp_wood; cp_output; cp_residue	m_dry	usda-wood-handbook-2021
meter_mj	electricity_in	MJ = kWh * 3.6 for metered electrical delivery; no calorific fuel factor or boiler efficiency.	kWh; cp_energy	MJ	corrim-northern-lumber-2025
coverage_conversion	shingle_out	r_cover = m_layout / A_cover; r_face = m_layout / A_face; A_face is the sum of full piece faces, A_cover is unique covered plane area after overlap. A_overlap is reported separately; gaps and starter/ridge/cut allowances stay in the layout ledger. For a downstream declared coverage A, required shingle mass = r_cover * A, at the matched moisture and grade. Measure, never assume r_cover from density or nominal exposure alone.	m_layout; A_cover; A_face; A_overlap; cp_area	r_cover; r_face	usda-shingle-roofs-2011
pm_partition	pm_fine; pm_middle; pm_coarse	fine = PM2.5; middle = PM10 - PM2.5; coarse = PM_total - PM10, only for matched nested measurements. Each result must be nonnegative; do not add PM_total or PM10 again.	PM_total; PM10; PM2.5; cp_air	fine; middle; coarse	epa-sawmill-pte-2014
shared_burdens	shared environmental burdens only	a_j = D_j / sum(D_j); D_j is measured oven-dry mass of eligible saleable output j of the shared stage. B_j = a_j * B_shared + B_direct,j. Apply to burdens, never physical coproduct flows.	D_j; stage ledger; cp_residue; cp_output	a_j; B_j	corrim-northern-lumber-2025
balance_closure	mill	Dry wood input + opening stock = dry products + dry coproducts + dry wastes + wood-derived airborne matter + closing stock + documented degradation; reconcile water and measured carbon fractions separately. Captured dust stays in residue outlets. Carbon in CO2/CH4 uses species stoichiometry, not gas mass as carbon mass. Report residual and uncertainty; do not silently balance by adding a default emission.	cp_wood; cp_output; cp_residue; cp_balance; cp_air; cp_carbon	dry mass; water; carbon closure	corrim-northern-lumber-2025; usda-wood-handbook-2021

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
identity	all rows	Verify full material/route, flow type, medium, reference property and unit; blank identities remain pending. A UUID alone does not establish a compatible background dataset.	Supplier/test definitions and identity records
representativity	mill	Declare geographic/year and period coverage, species and grade mix; weight lots by accepted net mass. Never transfer northern lumber survey yields/emissions to cedar shingles.	corrim-northern-lumber-2025
missing_data	all rows	Record absent, measured zero, below detection, estimated and missing distinctly; no implicit zero. Actual additional exchanges need atomic cards and matched identities.	Collection package and limits
balance	mill	Keep physical and allocated ledgers separate and investigate unmatched closure beyond stated measurement uncertainty; show residue sale/waste split without duplication.	Mass/water/carbon ledgers

9. Validation Rules

Require exactly one finished reference output and 1 kg net basis; all external amounts and collection aggregation use the same P and lot scope. Verify species, route, grade, moisture, area layout and treatment qualifiers. Reject lumber substituted for shingles, duplicate external internal transfers, duplicate residue sales/wastes, nested additive PM, assumed generic density and unverified chip-volume/background conventions. Validate the unallocated physical balance and the separate partitioned burden sum. Each applicable blank identity, missing amount, unsupported background basis or unspeciated release is a data-package incompleteness, not scientific approval.

10. Published Dataset Profile

Field	Value
dataset_role	Foreground sawn-shingle production process; compatible upstream-expanded dataset
downstream_use	secondary_dataset; background_dataset
allowed_use	Qualified matching untreated Thuja plicata manufacturing and explicitly measured mass-to-coverage conversion
excluded_use	Whole CPC equivalence; treated/dried or split shake proxy; installed weatherproof-service claims; automatic carbon credits
required_metadata	All reference qualifiers; upstream boundary; stage/lot balance; coproduct/waste decision; allocation and area basis; measured quantities; compatible datasets
required_quality_disclosure	Actual data period, sampling/uncertainty, blank identities, conditional absences, volume/property compatibility and missing emissions
update_trigger	Species/grade, moisture or delivery state, route, treatment, electricity, residue outlets, allocation or installed layout changes

11. Data Sources

Source id	Type	Reference	Used for
cssb-cedar-lca-2007	literature	CSSB preliminary cedar-shake/shingle LCA summary (03/07)	Page 1: named 2007 study products and cedar coproduct categories only; preliminary promotional summary, no case quantitative or superiority claims adopted
usda-shingle-roofs-2011	official_guidance	USDA FPL-GTR-201 (2011)	Printed pp. 1-5, Table 1: sawn/split product distinction, grade/species and coverage/exposure context; no universal dimensions, installation or lifetime adopted
usda-wood-handbook-2021	handbook	USDA Wood Handbook, FPL-GTR-282 (2021)	Ch. 4 pp. 4-1, 4-11; Ch. 13 p. 13-2: dry-basis moisture, density state and oven method; no species density or moisture default
epa-sawmill-pte-2014	official_guidance	EPA Region 10 sawmill particulate PTE memorandum (2014)	Memo p. 1, attachment p. 1: non-boiler mechanical activity and nested filterable PM definitions; PNW Indian Country PTE factors are not actual shingle emissions
corrim-northern-lumber-2025	literature	CORRIM Northern softwood lumber LCA, July 22 2025	Sections 3.2.4, 3.2.6, 3.3, 4.6-4.7: balance, direct/shared allocation and emission screening method analogy only; northern-US lumber survey parameters are not cedar-shingle defaults