Virgin high-pressure LDPE homopolymer granulate, bulk supplied

1. Scope and Applicability

This method addresses the material need to produce primary virgin LDPE resin from monomer with high-pressure radical reaction, incomplete single-pass conversion, recovery/purge and pellet conditioning. It reuses the retained semantic PCR directory rather than creating another classification-derived record. It excludes purchased-resin conversion. Each actual grade/route is selected and evidenced before a dataset is represented; the four source-supported initiation/reactor variants below are distinct alternatives, not one averaged technology. ec-polymers-bref-2007 lyb-lupotech-2025

The real commercial grade Lupolen 2420K establishes a non-additivated pellet supply form, with bulk containers among the documented delivery options. Its TDS does not identify the polymerisation reactor, initiator recipe or manufacturing geography; a producer must supply those actual qualifiers. Its typical MFR/density are not mandatory limits, density conversions or substitutes for site COA. Do not infer homopolymer chemistry merely from a broad name: verify monomers and grade declarations. This method does not prescribe Trigonox B, heptane or propanal for that SKU. lyb-lupolen-2420k-2026

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.other-transportable-goods-except-metal-products-machinery-and-equipment.basic-chemicals.polymers-of-ethylene-in-primary-forms
classification_refs	CPC 3.0 34710 is broader than this LDPE-only method; no accepted mapping is established here.
covered_products	Virgin non-additivated branched LDPE ethylene homopolymer, newly polymerised and supplied as accepted bulk granulate; each actual grade and reactor route remains separate.
excluded_products	HDPE; LLDPE; EVA and acrylic copolymers; UHMWPE; recycled resin; bio-attributed or mass-balance claims without separate evidence; filled, coloured, crosslinked or additive/masterbatch compounds; purchased-resin conversion; pipe, film, fibre and finished articles; bagged delivery.
representative_product	Non-additivated virgin LDPE pellets; Lupolen 2420K is a real commercial grade example, not a fixed plant recipe or reactor assignment. A dataset declares its own supplier grade and acceptance specification. lyb-lupolen-2420k-2026
production_route	High-pressure free-radical polymerisation of delivered ethylene: declare tubular oxygen-only, tubular peroxide/oxygen, tubular peroxide-only, or peroxide-initiated stirred autoclave. Preserve reactor zoning, chain-transfer chemistry, carrier, actual conversions, recycle/purge and finishing. Do not average routes merely because the reference UUID is broad. ec-polymers-bref-2007 lyb-lupotech-2025
market_state	Degassed, dried, accepted solid granulate at the bulk-loading factory gate; net resin mass excludes tanker/container tare and transport packaging. No downstream film service is represented.

3. Reference Flow

Field	Value
What	Supply qualified virgin LDPE resin for subsequent conversion.
How much	1 kg net accepted supplied granulate of one declared grade, route and state.
How well	Grade-specific COA acceptance for LDPE identity, melt-flow test basis, density test basis, branching/grade designation, additive absence, moisture and residual volatiles; do not replace contracted limits with typical brochure values.
How long or cycle	One complete matched production and supply reporting period; no service lifetime.
reference_flow_link	bulk_supplied_ldpe

Field	Value
Reference amount	1
Reference product flow	polyethylene low density granulate (PE-LD) 4f19f116-7b3b-11dd-ad8b-0800200c9a66
Reference flow property	Mass 93a60a56-a3c8-11da-a746-0800200b9a66
Reference unit group	Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
Reference unit	kg
Required qualifiers	actual site and period; virgin ethylene source and impurity specification; LDPE homopolymer grade and non-additivated state; reactor and initiation route; actual initiator/carrier/modifier identities; acceptance and test basis; net dry/degassed bulk-granulate state; moisture and residual species; Q and stock/burden carry; utility and treatment gates

Required qualifiers must be declared in dataset metadata or equivalent traceable fields. Native reference is generic LDPE granulate: no grade, CAS, route, location or quantity is inferred. Mass is the only native reference property with coefficient 1; it is not density.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_mass	reference product	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Reference mass and terminal inventory are 1 kg net accepted supplied LDPE granulate; tare/packaging excluded, declared moisture and residual volatiles retained in species ledger.
reporting_basis	all inventory rows			Collect complete raw-period numerators. native_conversion and matched_period_ledger precede normalize_period, the sole division owner; cards and protocol aggregation refer to that same result per reference flow. No double normalisation.
formulation_species	p_primary	Mass	kg	Whole purchased formulations are physical input mass. Active assay, water, carrier and impurities are component subledgers; internally mixed recipes use separately purchased raw ingredients, not both ingredients and a second purchased blend.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Fresh ethylene delivered to the resin plant, with source, purity/impurity certificate, pressure, temperature and delivery mode declared; purchased chemicals and utilities at their actual supply gates.
starting_condition_role	Primary resin manufacture from monomer; foreground gate-to-gate plus linked upstream burdens for cradle-to-gate use.
product_classification_scope	Only the specified virgin LDPE granulate subset of CPC 3.0 34710; classification does not establish grade or methodology equivalence.
recursive_input_rule	Internally recovered ethylene, internal pellets and returned same-line rework retain physical transfer IDs and carried burdens; they are not new external procurement. Purchased same-category resin is a separate upstream input, never evidence of primary polymerisation; a purchased-resin-only conversion lies outside scope.
upstream_dataset_requirement	Link actual ethylene route/source and each externally acquired formulation, ingredient, carrier, oil, utility and waste-treatment service to compatible upstream datasets; disclose missing providers without inventing recipes or quantities.
disclosure	Declare site geography/time, grade, reactor and initiation route, all process steps, supply form, inter-site transfers, utility generation, heat export and waste/air/water treatment scope. The selected LDPE native flow has no CAS, route, grade, comment or supply geography; these are foreground qualifiers, not implied native facts.

route_id	Reactor/initiation	Required distinct coverage
t_oxygen	Tubular, oxygen/air initiation	Actual air composition, compression, heat transfer, recycle/purge; do not insert an absent peroxide.
t_peroxide	Tubular, peroxide initiation	Every actual peroxide/formulation, injection zone, carrier, modifier and cooling/heat recovery.
t_combined	Tubular, peroxide and oxygen/air initiation	Both actual initiation supplies, each recorded once with component ledgers and route-specific conversion.
a_peroxide	Stirred autoclave, peroxide initiation	Actual peroxide/carrier, agitation, feed/zone cooling and downstream separation; no tubular oxygen-only substitution.

rule_id	Rule	source_ids
primary_chain	Include fresh-feed receipt and qualification, actual purification if present, initiator storage/dilution/dosing, primary and hyper-compression, the selected reactor and temperature zones, cooling, HP/LP separation, recycle compression, oil/wax separation, purification purge, melt extrusion, underwater pelletising, drying, silo degassing, quality acceptance, bulk loading, cleaning and attributable on-site environmental treatment. Record each actual purchased catalyst, solvent, moderator and auxiliary separately; the listed LDPE branches do not use a Ziegler/Phillips catalyst. ec-polymers-bref-2007 lyb-lupotech-2025 ec-polymers-bref-2007; lyb-lupotech-2025	ec-polymers-bref-2007; lyb-lupotech-2025
actual_atomic_extension	Each inventory card denotes one exchange at its actual physical supply/discharge gate. Conditional cards are included only when documented; demonstrated absence is not_applicable, not an invented zero. Add one fully specified card per additional actual peroxide, formulation, carrier, modifier, catalyst, refrigerant, fuel, purge constituent, waste or emitted molecule. No broad flow UUID permits replacement of a hard CAS, grade, medium or route. Whole purchased formulations cross the boundary once; their assayed species and carrier water are subledgers, not duplicate purchases. On-site dilution instead records separately acquired ingredients and actual energy/losses. nouryon-trigonox-b-2025 nouryon-trigonox-b-2025	nouryon-trigonox-b-2025
environment_gates	At each recovery/purge destination distinguish internal return, exported feedstock, external waste-treatment transfer and final environmental discharge. Keep each molecular constituent in the raw species ledger. Captured gas oxidised on site is an internal transfer; count actual fuel/air/energy and post-treatment species, not both captured gas and its combustion products as emissions. Off-site wastewater is one measured physical waste stream with a constituent subledger; do not also emit its constituents locally. Record every actual final waterborne species separately when on-site discharge is included. ec-polymers-bref-2007 ec-polymers-bref-2007	ec-polymers-bref-2007

6. Process Inventory Structure

Every card amount and protocol aggregation below describes the same final reporting result from normalize_period. Its calculation dependency applies to all inventory rows under section 8, including internal transfers. The finite direct-reference basis fields do not perform any arithmetic; collection_method preserves the raw period numerator. All conversions, carry/stock attribution and the one division belong to the section 8 rules.

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
p_primary	Integrated primary LDPE manufacture	required	One declared high-pressure route and grade	Receipt/preparation, compression, polymerisation, separation/recycle/purge, extrusion/pelletising, degassing/QC and actual on-site utilities/treatment	primary_granulate
p_bulk_gate	Bulk acceptance and loading gate	required	Same declared grade/route/state; separate physical loading and acceptance boundary	Internal transfer and stock custody, actual gate burdens and new accepted bulk supply	bulk_supplied_ldpe

The primary process is an integrated foreground unit, not a claim that all operations use one meter. cp_feed, cp_energy, cp_production, cp_recovery, cp_environment and cp_water retain operation/stream ownership and internal species/utility ledgers. High/low-pressure recycle, purified returns and captured gas are actual internal transfers and must reconcile; omitting separate procurement cards for them does not remove their energy, losses or chemistry. Conditional named example cards are not an exhaustive recipe. Add every actual distinct exchange before reporting; missing species/amounts remain explicit.

Process: Primary LDPE manufacture (p_primary)

Inputs

Product flows

Fresh monomer (fresh_ethylene)

Record fresh supplied ethylene separately from recycled circulation; assay ethylene and each impurity. No universal purity or upstream route is implied. The screened refinery-grade identity is not used as a generic source.

• Selected flow: Polymerisation-grade ethylene
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_feed.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_feed
• Sources: ec-polymers-bref-2007

Commercial DTBP supply (dtbp_supply)

Conditional when actually purchased for either peroxide route. Count the entire delivered commercial product once, including measured non-active fraction; assayed DTBP CAS110-05-4, active oxygen and impurities are separate subledgers. Do not assume the minimum specification is the batch assay.

• Selected flow: Di-tert-butyl peroxide, commercial Trigonox B
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_feed.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_feed
• Sources: nouryon-trigonox-b-2025

Separately purchased peroxide carrier (heptane_makeup)

Only separately acquired n-heptane CAS142-82-5 for the actual dilution recipe; do not duplicate heptane already included in a purchased peroxide solution. Native name says production mix, at plant; route and geography are unspecified. The patent is a laboratory example, not a recipe requirement.

• Selected flow: Heptane f3026a5f-e4ce-4bb3-b015-92d56ebb0091
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_feed.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_feed
• Sources: arkema-wo2025133548

Chain-transfer agent (propanal_modifier)

CAS123-38-6, conditional on actual separate supply and recipe; record assay, carrier and reaction/incorporation fate. The patent example does not prescribe this modifier for all grades or for Lupolen2420K.

• Selected flow: Propanal
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_feed.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_feed
• Sources: arkema-wo2025133548

Oxygen initiation air (initiation_air)

Only actual tubular oxygen/air initiation; specify dry/wet standard conditions and measured oxygen composition. Meter the supplied air once; its oxygen/nitrogen/water are constituent subledgers. Do not enter purchased oxygen simultaneously unless it is a distinct real supply.

• Selected flow: Compressed air
• Flow property / unit: Volume / m3
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_feed.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_feed
• Sources: ec-polymers-bref-2007

Compressor lubricant makeup (compressor_oil)

Actual lubricant formulation, supplier and makeup/loss/retained oil; no proxy assumption that oil is ethylene or polymer. Split any distinct synthetic oil or additive supply as its own row.

• Selected flow: Mineral lubricating oil
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_feed.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_feed
• Sources: ec-polymers-bref-2007; lyb-lupotech-2025

Primary plant purchased electricity (primary_electricity)

Actual voltage, geography, grid/provider and period for compression, reactor agitation, cooling, recycle, extrusion, drying and environmental equipment; exclude separately owned gate meters. Screened CN grid identity cannot silently represent another location.

• Selected flow: Medium-voltage alternating current
• Flow property / unit: Energy / kWh
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_energy.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_energy
• Sources: ec-polymers-bref-2007

Purchased steam (steam_import)

Actual imported steam at specified pressure, temperature, enthalpy and condensate-return boundary. Keep steam mass/water subledger independently. Do not also purchase the fuel used by its external supplier.

• Selected flow: Steam
• Flow property / unit: Energy / MJ
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_energy.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_energy
• Sources: ec-polymers-bref-2007

On-site combustion fuel (natural_gas)

Conditional on actual on-site boiler/oxidiser use. Retain integrated dry/wet gas volume, composition, pressure and temperature, measured heating basis and actual combustion species. No further multiplication by duration for integrated volume. Other actual fuels require separate rows.

• Selected flow: Natural gas
• Flow property / unit: Volume / m3
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_energy.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_energy
• Sources: ec-polymers-bref-2007

Treated process-water makeup (water_makeup)

Actual incoming treated water for cooling and underwater pelletising, washing and utility makeup. Native flow specifies treated industrial water but no site, treatment route or quality; verify those locally. Internal recirculation is not fresh withdrawal. Separate steam/condensate and all other actual water sources by gate.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_water.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_water
• Sources: ec-polymers-bref-2007

Purchased purge nitrogen (nitrogen_purge)

Conditional on actual purging/inerting; native flow gives no CAS, route, grade or geography. Verify gaseous supply, purity and actual purge destination. Do not transplant CN or GLO labels from other nitrogen candidates.

• Selected flow: nitrogen 4f19ca0f-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_feed.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_feed
• Sources: ec-polymers-bref-2007

Silo degassing air supply (degassing_air)

Actual air supplied for pellet degassing/conveying, separately metered from initiation. Declare gas conditions and carrier energy boundary; if generated on site record atmospheric intake and actual compressor electricity without a second purchased-air burden.

• Selected flow: Compressed air
• Flow property / unit: Volume / m3
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_energy.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_energy
• Sources: ec-polymers-bref-2007

Elementary flows

On-site combustion atmospheric air (combustion_air)

Only the actual atmospheric intake for included on-site combustion; measured/engineered oxygen, nitrogen, humidity and inert composition in subledger. Keep separate from purchased initiation air and silo air.

• Selected flow: Air
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: ec-polymers-bref-2007

Outputs

Product flows

Accepted internal granulate transfer (primary_granulate)

Actual qualified dry/degassed LDPE granulate transferred to the bulk gate; retain transfer/lot IDs, residual monomer and carried upstream burdens. This is an internal intermediate, not the terminal reference, even though its native granulate UUID is the same.

• Selected flow: polyethylene low density granulate (PE-LD) 4f19f116-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_production.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_production
• Sources: ec-polymers-bref-2007; lyb-lupotech-2025

Separately sold off-grade granulate (offgrade_granulate)

Only actual separately sold LDPE off-grade granulate; record its true grade/function, price/allocation and destination. Broad native LDPE identity does not qualify it as accepted declared-grade output. Waste granulate instead uses the waste row; internal rework is not an extra sale.

• Selected flow: polyethylene low density granulate (PE-LD) 4f19f116-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_production.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_production
• Sources: ec-polymers-bref-2007

Recovered monomer exported for feedstock (recovered_ethylene_export)

Only actual feedstock export beyond the foreground boundary to a cracker/purifier; record ethylene and each impurity, quality and destination. Internal HP/LP recycle stays in the loop ledger and is neither a purchase nor an exported credit.

• Selected flow: Recovered ethylene
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_recovery.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_recovery
• Sources: ec-polymers-bref-2007

Recovered solvent exported (recovered_heptane_export)

Conditional on actual recovered n-heptane export meeting a declared reuse specification. Native production-mix, at-plant identity does not establish recovered purity or provider; disclose this compatibility debt and verify before linking a background provider. Internal return remains internal.

• Selected flow: Heptane f3026a5f-e4ce-4bb3-b015-92d56ebb0091
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_recovery.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_recovery
• Sources: arkema-wo2025133548

Actually saleable polyethylene wax (wax_sale)

Actual separated oligomeric wax sold with composition, oil content, quality and allocation; mutually exclusive with the waste-wax destination for the same mass.

• Selected flow: Polyethylene wax
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_recovery.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_recovery
• Sources: ec-polymers-bref-2007

Actually exported recovered steam (steam_export)

Only metered externally useful recovered steam with pressure/temperature and condensate boundary. Internal recovered steam is an internal energy ledger, not an additional export. Include water mass and stated allocation.

• Selected flow: Steam
• Flow property / unit: Energy / MJ
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_energy.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_energy
• Sources: ec-polymers-bref-2007; lyb-lupotech-2025

Waste flows

Separated waste wax (waste_wax)

Actual discarded oligomeric wax, with entrained oil and solvent composition, treatment and destination; exclude any mass already sold.

• Selected flow: Polyethylene wax residue
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: ec-polymers-bref-2007

Spent compressor oil (waste_oil)

Actual drained/lost oil sent to external treatment; reconcile new oil, retained oil, wax-associated oil and oily effluent without double counting.

• Selected flow: Waste mineral lubricating oil
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: ec-polymers-bref-2007

Discarded resin (discarded_pellets)

Actual discarded granulate, separate from sold off-grade and internal returns; trace failed and transition-grade batches and their burdens.

• Selected flow: Waste LDPE granulate
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: ec-polymers-bref-2007

Wastewater sent off site (wastewater_transfer)

One actual external liquid waste stream, with water, oil, polymer fines and every identified dissolved species in a non-additive constituent ledger. Retain flow, concentration, sampling and receiving treatment; no additional local elementary emission for those same constituents.

• Selected flow: Polymerisation-plant wastewater
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: ec-polymers-bref-2007

Elementary flows

Residual ethylene to air (ethylene_air)

Conditional on this actual substance reaching air after recovery/abatement; retain molecular identity, source point, compartment, measured raw-period mass and control efficiency evidence. Sample all actual routine, start/stop, leak and emergency releases; no generic VOC-to-species split or inferred zero.

• Selected flow: Ethylene
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: ec-polymers-bref-2007

Carrier heptane to air (heptane_air)

Conditional on this actual substance reaching air after recovery/abatement; retain molecular identity, source point, compartment, measured raw-period mass and control efficiency evidence. Sample all actual routine, start/stop, leak and emergency releases; no generic VOC-to-species split or inferred zero.

• Selected flow: n-Heptane
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: arkema-wo2025133548

Modifier propanal to air (propanal_air)

Conditional on this actual substance reaching air after recovery/abatement; retain molecular identity, source point, compartment, measured raw-period mass and control efficiency evidence. Sample all actual routine, start/stop, leak and emergency releases; no generic VOC-to-species split or inferred zero.

• Selected flow: Propanal
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: arkema-wo2025133548

Initiator-derived acetone to air (acetone_air)

Conditional on this actual substance reaching air after recovery/abatement; retain molecular identity, source point, compartment, measured raw-period mass and control efficiency evidence. Sample all actual routine, start/stop, leak and emergency releases; no generic VOC-to-species split or inferred zero.

• Selected flow: Acetone
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: nouryon-trigonox-b-2025

Actual methane to air (methane_air)

Conditional on this actual substance reaching air after recovery/abatement; retain molecular identity, source point, compartment, measured raw-period mass and control efficiency evidence. Sample all actual routine, start/stop, leak and emergency releases; no generic VOC-to-species split or inferred zero.

• Selected flow: Methane
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: nouryon-trigonox-b-2025

Initiator-derived tert-butanol to air (tert_butanol_air)

Conditional on this actual substance reaching air after recovery/abatement; retain molecular identity, source point, compartment, measured raw-period mass and control efficiency evidence. Sample all actual routine, start/stop, leak and emergency releases; no generic VOC-to-species split or inferred zero.

• Selected flow: tert-Butanol
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: nouryon-trigonox-b-2025

Polymer particles to air (polymer_dust_air)

Conditional on this actual substance reaching air after recovery/abatement; retain molecular identity, source point, compartment, measured raw-period mass and control efficiency evidence. Sample all actual routine, start/stop, leak and emergency releases; no generic VOC-to-species split or inferred zero.

• Selected flow: Polyethylene particulate matter
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: ec-polymers-bref-2007

On-site fossil carbon dioxide (fossil_co2_air)

Conditional on this actual substance reaching air after recovery/abatement; retain molecular identity, source point, compartment, measured raw-period mass and control efficiency evidence. Sample all actual routine, start/stop, leak and emergency releases; no generic VOC-to-species split or inferred zero.

• Selected flow: Carbon dioxide, fossil
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: ec-polymers-bref-2007

Incomplete-combustion carbon monoxide (co_air)

Conditional on this actual substance reaching air after recovery/abatement; retain molecular identity, source point, compartment, measured raw-period mass and control efficiency evidence. Sample all actual routine, start/stop, leak and emergency releases; no generic VOC-to-species split or inferred zero.

• Selected flow: Carbon monoxide
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: ec-polymers-bref-2007

Combustion nitric oxide (no_air)

Conditional on this actual substance reaching air after recovery/abatement; retain molecular identity, source point, compartment, measured raw-period mass and control efficiency evidence. Sample all actual routine, start/stop, leak and emergency releases; no generic VOC-to-species split or inferred zero.

• Selected flow: Nitrogen monoxide
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: ec-polymers-bref-2007

Combustion nitrogen dioxide (no2_air)

Conditional on this actual substance reaching air after recovery/abatement; retain molecular identity, source point, compartment, measured raw-period mass and control efficiency evidence. Sample all actual routine, start/stop, leak and emergency releases; no generic VOC-to-species split or inferred zero.

• Selected flow: Nitrogen dioxide
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: ec-polymers-bref-2007

Fuel-sulfur dioxide (so2_air)

Conditional on this actual substance reaching air after recovery/abatement; retain molecular identity, source point, compartment, measured raw-period mass and control efficiency evidence. Sample all actual routine, start/stop, leak and emergency releases; no generic VOC-to-species split or inferred zero.

• Selected flow: Sulfur dioxide
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: ec-polymers-bref-2007

Nitrogen leaving the actual gas balance (nitrogen_air)

Conditional on this actual substance reaching air after recovery/abatement; retain molecular identity, source point, compartment, measured raw-period mass and control efficiency evidence. Sample all actual routine, start/stop, leak and emergency releases; no generic VOC-to-species split or inferred zero.

• Selected flow: Nitrogen
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: ec-polymers-bref-2007

Unreacted oxygen leaving the actual gas balance (oxygen_air)

Conditional on this actual substance reaching air after recovery/abatement; retain molecular identity, source point, compartment, measured raw-period mass and control efficiency evidence. Sample all actual routine, start/stop, leak and emergency releases; no generic VOC-to-species split or inferred zero.

• Selected flow: Oxygen
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: ec-polymers-bref-2007

Water vapour to air (water_vapour_air)

Reconcile actual evaporated cooling/pellet water, feed humidity and combustion water in the water ledger; no water is inferred from ethylene addition polymerisation or a closure residual.

• Selected flow: Water vapour
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_environment.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_environment
• Sources: ec-polymers-bref-2007

On-site treated water discharge (treated_water_out)

Conditional on actual on-site final surface-water discharge, with receiving medium and measured water fraction; separately identify every actual dissolved substance and suspended material in additional atomic rows. COD remains an indicator, not a molecular emission or water-reaction factor. Mutually exclusive with external waste transfer for the same water.

• Selected flow: Water, to surface water
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_water.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_water
• Sources: ec-polymers-bref-2007

Process: Bulk supply gate (p_bulk_gate)

Inputs

Product flows

Physical internal granulate receipt (internal_granulate_receipt)

Exactly match primary_granulate lot/transfer and carried burden. Retain receipts, returns, opening/closing silo stocks and actual loading loss; remove paired internal transfers only when aggregating the whole foreground.

• Selected flow: polyethylene low density granulate (PE-LD) 4f19f116-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_gate.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_gate
• Sources: ec-polymers-bref-2007; lyb-lupolen-2420k-2026

Bulk-gate electricity (gate_electricity)

Actual separately owned conveying/loading and gate-cleaning meter; site voltage, provider and geography required. Exclude primary_electricity meter coverage and any customer transport.

• Selected flow: Medium-voltage alternating current
• Flow property / unit: Energy / kWh
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_gate.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_gate
• Sources: ec-polymers-bref-2007

Outputs

Product flows

Terminal accepted bulk supplied LDPE (bulk_supplied_ldpe)

Unique terminal reference: new positive accepted supply of the declared grade/route/state; calibrated net loading weight excludes tare, returns, rework, off-grade and duplicate lots. Residual monomer/moisture remain declared in the supplied product species ledger.

• Selected flow: polyethylene low density granulate (PE-LD) 4f19f116-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass / kg
• Amount rule: 1 kg
• Value mode: fixed_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_gate
• Sources: lyb-lupolen-2420k-2026

Waste flows

Collected loading spillage (loading_waste)

Only actually discarded captured spillage; recovered same-line material is a separately tracked internal return, not this waste or accepted supply.

• Selected flow: Waste LDPE granulate
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_gate.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_gate
• Sources: ec-polymers-bref-2007

Elementary flows

Uncaptured loading dust (loading_dust_air)

Actual uncollected dust to air at loading after capture; distinguish collected spillage and captured dust sent to waste from final emissions.

• Selected flow: Polyethylene particulate matter
• Flow property / unit: Mass / kg
• Amount rule: Reported foreground amount on the declared reference-flow basis; cp_gate.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_gate
• Sources: ec-polymers-bref-2007

7. Allocation and Co-product Handling

rule_id	Rule	source_ids
direct_attribution	First segregate by site, reactor route and accepted resin grade; directly attribute feed, utilities and treatment using matched meters and batch/campaign records. Shared burdens need measured physical drivers and a stated allocation rationale and sensitivity. Do not infer equal utility consumption or blend routes from a common generic flow identity. ec-polymers-bref-2007 ec-polymers-bref-2007	ec-polymers-bref-2007; jrc-ilcd-allocation-2010
secondary_outputs	Wax, off-grade resin and actually exported steam are separately quantified outputs, never extra accepted reference output. Avoid allocation where subdivision is possible. If a sold output requires allocation, record actual quality/function and quantities, then identify and apply supported determining physical causal relationships to each exchange, including virtual subdivision where possible. Only remaining burdens that cannot be assigned this way may use documented market values for actual co-functions at the same process-exit condition; explain why physical assignment is unavailable, document matched-period quantities/prices, and report sensitivity. Waste is not silently promoted to coproduct. Recycle is not an avoided virgin purchase credit. Heat recovered and used internally reduces measured import only; no second export credit. ec-polymers-bref-2007 lyb-lupotech-2025 ec-polymers-bref-2007; lyb-lupotech-2025	ec-polymers-bref-2007; lyb-lupotech-2025; jrc-ilcd-allocation-2010

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_feed	p_primary	Individual fresh chemical, formulation and air supply	delivery and stock ledger	lot ID; material/formulation/CAS; supplier; assay and component/carrier fractions; receipt and return masses; tank openings/closings; dosing; gas conditions; impurities; each actual initiator/modifier identity	Owner: primary plant material custodian. Retain raw delivery, calibrated scale/tank and dosing records for the entire period, including failed and transition runs; keep externally purchased formulations and assayed components separate. Record gas volume or rate with its original unit/time basis. Do not divide by output here.	Raw kg; m3 with stated conditions; kWh; MJ; concentrations in original laboratory units, by record type	Each receipt, run, meter interval, analysis and stock boundary	Complete matched reporting period including failed/zero-output operations and opening/closing WIP	Declared site and this protocol process owner; same grade/route/state; retain submeter/stream boundaries	per 1 kg reference flow	supplier certificates; calibration; component assay; opening/closing reconciliation; recipe and source route evidence
cp_energy	p_primary	Each primary utility and fuel	meter and utility balance	meter ID and operation owner; interval readings; actual utility grade; voltage; pressure/temperature; integrated gas volume or flow rate and duration; gas composition; heating basis; steam enthalpy and condensate; internal recovery; export; downtime	Owner: primary plant energy engineer. Preserve raw meter differences and fuel records, including failed/zero-output operations, maintenance, recovery and pollution control. Distinguish purchased utilities from on-site generation; no raw-period output division. An integrated volume is already accumulated; rate records retain their measured duration.	Raw kg; m3 with stated conditions; kWh; MJ; concentrations in original laboratory units, by record type	Each receipt, run, meter interval, analysis and stock boundary	Complete matched reporting period including failed/zero-output operations and opening/closing WIP	Declared site and this protocol process owner; same grade/route/state; retain submeter/stream boundaries	per 1 kg reference flow	calibrations; supplier/geography; energy allocation meter diagram; enthalpy/heat-value evidence; import/export receipts
cp_production	p_primary	Internal and off-grade LDPE production	batch and stock genealogy	run ID; reactor and initiation route; grade; recipe; start/end; accepted internal output; off-grade; failed/zero-output runs; returned/reworked lot IDs; opening/closing WIP and silo mass; species fractions; incoming and outgoing carried burden vectors	Owner: production supervisor. Preserve original run, QC, weighing and inventory records for every included run; identify both physical stock mass and inherited burden by lot. No presumption that polymerisation feed equals accepted output, and no division by product quantity.	Raw kg; m3 with stated conditions; kWh; MJ; concentrations in original laboratory units, by record type	Each receipt, run, meter interval, analysis and stock boundary	Complete matched reporting period including failed/zero-output operations and opening/closing WIP	Declared site and this protocol process owner; same grade/route/state; retain submeter/stream boundaries	per 1 kg reference flow	reactor logs; COA; moisture/residual-monomer tests; WIP and rework reconciliation; failed-batch burden retention
cp_recovery	p_primary	Each recovered species and purge destination	recycle, purge and destination ledger	loop/stream ID; route; gross circulation; fresh makeup; purge/export; wax and oil separation; species mass/composition including ethylene and every actual impurity; retained gas/liquid/polymer inventory; source/destination; sale or waste	Owner: recovery engineer. Retain raw flowmeters, actual gas/liquid analyses, oil/wax weighings and destination receipts. Record internal transfers without external purchase credits and distinguish true purification/abatement species changes. Preserve unknowns explicitly; do not divide by output.	Raw kg; m3 with stated conditions; kWh; MJ; concentrations in original laboratory units, by record type	Each receipt, run, meter interval, analysis and stock boundary	Complete matched reporting period including failed/zero-output operations and opening/closing WIP	Declared site and this protocol process owner; same grade/route/state; retain submeter/stream boundaries	per 1 kg reference flow	stream diagram; GC and sampling; tank calibration; purifier/cracker transfer receipts; actual sale specification
cp_environment	p_primary	Every waste and air substance	source-resolved emission and waste record	source ID; molecular/CAS identity; compartment; raw concentration and flow or mass; dry/wet and standard conditions; timestamps; uptime/downtime/emergency; capture/treatment efficiency; destination; molecular inventory; carbon source; uncertainty and detection limit	Owner: site environmental engineer. Preserve original species-resolved monitoring, sampling, leak/emergency logs, waste weigh tickets and treatment records for the full period. Keep pre-treatment capture and final discharge distinct, including failed/zero-output runs; never infer a molecular split from total VOC/COD or divide records by output.	Raw kg; m3 with stated conditions; kWh; MJ; concentrations in original laboratory units, by record type	Each receipt, run, meter interval, analysis and stock boundary	Complete matched reporting period including failed/zero-output operations and opening/closing WIP	Declared site and this protocol process owner; same grade/route/state; retain submeter/stream boundaries	per 1 kg reference flow	sampling plan; laboratory species analysis; validated raw emission method; LDAR; waste receiver; balances and uncertainties
cp_water	p_primary	Physical water and waterborne species	water and speciation ledger	each intake; recirculation; steam/condensate; feed moisture; evaporation; wastewater; actual final waterborne species; phase water; opening/closing stocks; independently supported water formation/consumption; concentration and integrated volume	Owner: site water-balance engineer. Keep original water meters, analyses, steam balances and moisture tests. Separate physical/elemental closure from supported chemical species and phase changes; no residual-derived reaction water. Raw period quantities remain unnormalised.	Raw kg; m3 with stated conditions; kWh; MJ; concentrations in original laboratory units, by record type	Each receipt, run, meter interval, analysis and stock boundary	Complete matched reporting period including failed/zero-output operations and opening/closing WIP	Declared site and this protocol process owner; same grade/route/state; retain submeter/stream boundaries	per 1 kg reference flow	water-meter calibration; species analysis; receiving-water identity; independent reaction evidence; uncertainty
cp_gate	p_bulk_gate	Unique accepted bulk supply and gate burdens	loading, acceptance and stock genealogy	transfer and lot IDs; grade/route/state; net accepted supplied mass; gross/tare; COA; receipt/return/rework; opening/closing silo stocks; loading electricity; spillage/dust; inherited burden vector; period start/end	Owner: bulk-gate quality and dispatch custodian. Preserve raw calibrated weighbridge/loading and gate energy records; reconcile lot-level acceptance and returns once, retain non-output losses and carried WIP burdens. Identify new positive acceptance of this exact grade/route/state; do not divide any exchange by output in collection.	Raw kg; m3 with stated conditions; kWh; MJ; concentrations in original laboratory units, by record type	Each receipt, run, meter interval, analysis and stock boundary	Complete matched reporting period including failed/zero-output operations and opening/closing WIP	Declared site and this protocol process owner; same grade/route/state; retain submeter/stream boundaries	per 1 kg reference flow	weighbridge calibration; signed COA and release; lot genealogy; no duplicate acceptance; gate meter boundary

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
native_conversion	all raw inventory records	Before reporting normalisation, convert each raw numerator to its declared card unit using traceable native units: t to kg and kWh to MJ only as appropriate; a rate is integrated over measured duration, while integrated volume is not multiplied by time again. Convert volume to mass only with actual temperature/pressure/composition and an independently valid density or gas relation. No default resin/solvent density, heating value or secondary property coefficient.	raw_records; unit_evidence; cp_feed; cp_energy; cp_environment; cp_water; cp_gate	converted_raw_period_amounts
matched_period_ledger	all raw inventory records	Preserve the complete chosen-period burden vector A_i by site/grade/route/state, including all failed and zero-output operation and actual treatment burdens. Reconcile opening WIP/rework inherited burdens into the completed lots and carry closing WIP burdens forward once; no discarded operation may be omitted, and no inherited vector may be charged twice. Match transfers and reverse only genuine paired internal transfers for whole-foreground aggregation. Keep physical stock mass and burden carry ledgers separate, with explicit allocation of each burden to supplied, retained, off-grade or waste lots. This rule does not divide by Q.	converted_raw_period_amounts; cp_production; cp_recovery; cp_gate	matched_A_i; stock_and_carry_reconciliation
accepted_supply	bulk_supplied_ldpe	Q is the sum of unique new positive accepted net supplied kg of this declared grade/route/state in the matched period, reconciled to gross minus tare, quality release, returns, rework and opening/closing finished stock. Intermediate transfer, sold off-grade, losses and repeated acceptance do not increase Q. No report normalisation exists when Q is zero.	cp_gate; cp_production; acceptance_and_stock_records	Q	lyb-lupolen-2420k-2026
normalize_period	all inventory rows	Sole reporting-normalisation owner: q_i = matched_A_i / Q, for common positive Q after native_conversion and matched_period_ledger. Each card and protocol aggregation describes this same reported result per 1 kg reference flow; neither performs a second division. The terminal output is 1 kg. Keep raw numerator, conversion, carry/allocation and common Q traceable.	matched_A_i; Q	reported_inventory_per_1_kg
species_and_elements	p_primary; p_bulk_gate	Reconcile physical mass and each applicable element (C, H, O, N, S and formulation-specific elements) from complete inputs plus opening stock to outputs plus closing stock. Independently track actual polymer, residual ethylene, every impurity/modifier/carrier/initiator, oil, wax and decomposition product in all gas/liquid/solid phases and inventories. Distinguish single-pass conversion, recycle recovery, fresh-feed utilisation and accepted yield; measure each needed relation rather than assuming 100%. DTBP may form acetone, methane and tert-butanol, but the source supplies no universal split. Species unknowns remain unknown and require investigation, not residual-fitting.	cp_feed; cp_production; cp_recovery; cp_environment; cp_gate	physical_element_and_species_reconciliation	ec-polymers-bref-2007; nouryon-trigonox-b-2025
independent_water	p_primary; p_bulk_gate	Keep a distinct water ledger for supply/carrier/feed moisture, steam/condensate, evaporation, final effluent, retained/free water and stocks. Ethylene addition to the polyethylene repeat chain does not itself produce condensation water. Any water from actual side reaction, peroxide chemistry, fuel oxidation or purification requires independent molecular/pathway evidence and measured inputs; phase changes do not create water. Do not solve an unknown reaction-water term and another unknown outlet from the same closure residual; COD and carbon closure cannot supply either term.	cp_water; cp_feed; cp_energy; cp_environment	water_reconciliation_and_unresolved_terms	ec-polymers-bref-2007; nouryon-trigonox-b-2025

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
grade_and_route	reference and all lots	Record real grade and monomer identity, reactor/initiator/carrier chemistry, non-additivated state, net delivery form and test conditions. The same native LDPE UUID is not grade equivalence; suppliers must demonstrate acceptance and route independently.	supplier COA; actual production logs; grade specification; reference qualifiers
complete_period	all inventory rows	Use a complete common period across manufacturing and dispatch, including failures, shutdowns and zero-output operation. Retain boundaries, uncertainty, allocation, WIP/rework and inherited burden genealogy without dropping or recharging burdens.	meter/run/stock reconciliation and retained raw numerator ledger
native_identity_limits	UUID-bearing cards	LDPE: generic Product granulate, no CAS/route/grade/geography/comment. Heptane: CAS142-82-5, production mix at plant, no geography/route; recovered quality/provider still needs checking. Process Water: treated industrial water without explicit geography/route/quality. Nitrogen: generic Mass identity without CAS/route/grade/geography. Each has only reference Mass coefficient1; no native density or calorific assumption. Use their full restrictions and separately measure quantity/provider compatibility.	complete native flow and exact reference-property/unit chain; provider records
species_completeness	material and environmental ledgers	Track all actual purchased chemicals/formulations and all process/waste/emission species, not just carbon or the selected reference. Unidentified consequential species, unmeasured actual losses or contradictory reference/route must block the dataset claim and be reported; an auxiliary blank UUID alone does not invent such a method gap.	complete physical/element/species and independent water audits

9. Validation Rules

rule_id	Rule	source_ids
reference_identity	Require one explicit terminal link to bulk_supplied_ldpe, a Product output matching the declared LDPE reference UUID and 1 kg net basis in both languages. Preserve the same native UUID on physically distinct internal and off-grade granulate rows where applicable; those rows do not become terminal references. Reject HDPE slurry/gas-phase, LLDPE, EVA, recycled, film or compound identities for this output.
single_normalisation	Verify a complete matched raw-period numerator and common positive accepted supply Q. Only normalize_period performs reporting division, after native conversions and burden carry reconciliation. Reject a second A/Q in collection, aggregation, cards or downstream calculation. Keep failed/zero-output operation, returns/rework, transition grades, opening/closing WIP and inherited burdens; no denominator if Q is zero.
molecule_and_water_checks	Check total physical mass and every applicable element independently from actual molecular reaction/recovery pathways and the separate water ledger. Track ethylene, polymer, each modifier/carrier/initiator and its decomposition products, retained volatiles and inventory changes; quantify actual contaminants and unexplained residuals. Ethylene addition polymerisation itself has no condensation-water stoichiometry. No residual, carbon-only closure or COD may invent species, water or 100% conversion/yield. ec-polymers-bref-2007 nouryon-trigonox-b-2025 ec-polymers-bref-2007; nouryon-trigonox-b-2025	ec-polymers-bref-2007; nouryon-trigonox-b-2025
coverage_and_sources	Disclose missing measurements, unidentified species and unverified provider links. Before a foreground dataset is usable, resolve its actual reference/route, all material species and consequential missing amounts; a PCR protocol does not fabricate those measurements. Preserve full native names, geography, medium and exact property-to-unit relations and source limitations. Schema or UUID equality alone is not scientific validation.

10. Published Dataset Profile

Field	Value
dataset_role	Primary foreground LDPE resin manufacture and bulk supply; explicitly gate-to-gate unless upstream links are included.
downstream_use	secondary_dataset; background_dataset
allowed_use	Declared-grade LDPE resin feedstock for separately modelled conversion, after applicability and evidence review.
excluded_use	Generic interchangeable polyethylene family, recycled resin, EVA/LLDPE/HDPE, additive compound, pipe/film/fibre conversion or full service-life claims.
required_metadata	Site/time; actual grade, route and species; accepted bulk Q and stock/carry reconciliation; reference UUID and property/unit; upstream source gates; utility geography; allocation and treatment scope.
required_quality_disclosure	Raw evidence and uncertainty, failures/zero-output inclusion, WIP/rework carried burdens, missing providers/UUIDs/measurements, native limitations and species/water balance residuals. Source examples are not supplier measurements.
update_trigger	Change in grade, reactor/initiation/recipe, carrier, supply origin/state, recovery/purge or abatement, energy source, accepted-output definition or material measurement evidence.

11. Data Sources

source_id	type	reference	used_for
ec-polymers-bref-2007	official_guidance	European Commission, Production of Polymers BREF, August 2007, sections 3.2.1.1, 3.2.2, 3.3.1 and Table 3.9; https://bureau-industrial-transformation.jrc.ec.europa.eu/sites/default/files/2019-11/pol_bref_0807.pdf	Industrial route differences, incomplete single-pass conversion, compression/recycle/purge, wax separation, extrusion/degassing and environmental coverage. European historical description; 1999 survey aggregates are not present-site factors. Table 3.9 VOC/COD and primary-energy values cannot supply individual molecular flows or utility meters.
lyb-lupotech-2025	literature	LyondellBasell, Lupotech brochure 8735/25/08, pages 1–2 and Figures 1–2; https://www.lyondellbasell.com/globalassets/lyb/our-solutions/technologies/petrochemical/polyethylene/cta/Lupotech.pdf	Distinct tubular T and autoclave A process sequences and heat recovery. No process solvent/catalyst describes the reaction medium, not absence of peroxide carriers, modifiers or compressor oil. Recovery marketing is not measured 100% recovery. No assignment of a reactor or recipe to a named SKU.
nouryon-trigonox-b-2025	literature	Nouryon, Trigonox B Product Data Sheet, 2025-12-4, pages 1–2; https://www.nouryon.com/globalassets/inriver/resources/pds-trigonox-b-polymer-production-glo-en.pdf	Commercial DTBP initiator, CAS 110-05-4, usable in tubular/autoclave LDPE; assay, active oxygen and physical density are different quantities; acetone, methane and tert-butanol are major decomposition products. No recipe, emission split or universal dose. Chlorobenzene is a half-life test medium, not an inferred plant input.
lyb-lupolen-2420k-2026	literature	LyondellBasell, Lupolen 2420K Technical Data Sheet, locally acquired publication date 10/15/2026, pages 1–3; https://productsafety.lyondellbasell.com/DirectRequest?ProductGuid=79326e74-b73c-4977-9f56-b9e12367c004&ResponseTypeGuid=f1e32c20-d810-4db0-b25e-8e23a59f3733	Real non-additivated LDPE pellet grade and bulk-container delivery example. Typical properties are not specification limits or bulk density; film test and conversion temperatures are downstream tests, not polymerisation conditions. Regional sales availability is not manufacturing geography. No medical/pharmaceutical use or SKU reactor/initiator claim.
arkema-wo2025133548	literature	Arkema France, WO2025133548A1, published 2025-06-26, French original printed page 22, Protocole expérimental; https://patents.google.com/patent/WO2025133548A1	Specific heptane carrier and propionaldehyde chain-transfer-agent example in a laboratory batch stirred high-pressure autoclave. The tested peresters, laboratory scale and measured results are case-specific; no industrial recipe, DTBP amount, commercial grade identity, yield or scale-up factor is adopted.
jrc-ilcd-allocation-2010	official_guidance	European Commission JRC, ILCD Handbook, General guide for Life Cycle Assessment, Detailed guidance, first edition March2010, §7.9.3, printed257–258/PDF277–278; https://eplca.jrc.ec.europa.eu/uploads/ILCD-Handbook-General-guide-for-LCA-DETAILED-GUIDANCE-12March2010-ISBN-fin-v1.0-EN.pdf	Attributional multifunctionality method context: virtual subdivision and determining physical causality, then justified process-gate market value for remaining burdens. Supports allocation choices only; no LDPE recipe, universal mass/price share, recovered-material credit, heat substitution credit or full PEF/CFF claim.