Factory Audit in China should not only review production capacity or basic supplier information. For buyers, environmental management is also a practical risk-control area, especially when suppliers use chemicals, generate wastewater, produce sludge, create air emissions, or store hazardous waste. In an Environmental Audit, we review whether the factory’s documents, site conditions, storage areas, operating records, disposal records, and corrective action evidence are consistent with the supplier’s actual production activities. Our project service team also supports report review and follow-up coordination when buyers need clearer evidence before supplier approval, order continuation, or corrective action tracking.

Environmental Compliance

Environmental compliance in a China factory audit should be checked through documents, site conditions, operating records, and corrective action follow-up. We review whether the supplier maintains applicable environmental permits, pollutant discharge documents, environmental impact assessment files, monitoring reports, and waste-related records according to the factory’s actual production activities and local regulatory requirements where applicable. On site, we check whether wastewater points, exhaust outlets, chemical-use areas, storage zones, and temporary waste areas match the documented scope. For buyers, the main risk is not only missing paperwork, but also inconsistency between approved documents, daily production, equipment operation, and retained records.

Environmental Permit and Document Review

For environmental compliance, our audit starts with document consistency. We review whether the factory has environmental documents that match its actual business scope, production processes, workshop layout, equipment list, and pollution-control facilities. A permit or approval document has limited value if it covers only part of the factory’s real operation.

Common document review points include environmental impact assessment documents, acceptance records after construction or expansion, pollutant discharge permit information, wastewater or air emission monitoring reports, hazardous waste registration records, and environmental management procedures. We check document names, issue dates, validity periods, responsible departments, covered production lines, and whether records are updated after factory changes.

Document Type	Audit Focus	Buyer Risk if Missing or Inconsistent
Environmental impact assessment file	Whether the approved scope matches actual production	Production process may exceed approved environmental scope
Pollutant discharge permit	Whether discharge points and pollutant types are covered	Higher risk of environmental compliance gaps
Environmental acceptance records	Whether new workshops, lines, or equipment are covered	Factory expansion may not be properly documented
Monitoring reports	Whether wastewater, exhaust, or noise tests are recent	Factory may lack proof of ongoing control
Waste transfer records	Whether waste disposal is documented and traceable	Waste handling may not be controlled after leaving the site

We do not treat documents as a formality. During the audit, our team compares records against site observations. For example, if the document lists one exhaust treatment system but the site has several active emission points, this may indicate a gap that should be recorded for buyer review.

If documents are incomplete, expired, inconsistent, or unavailable during the audit, the report should record the finding clearly. It should identify what evidence was reviewed, what was missing, and what follow-up may be needed from the supplier.

• Validity period of environmental permits and approvals
• Consistency between approved production scope and actual production
• Records for wastewater, air emission, noise, and waste handling
• Evidence of environmental monitoring by qualified parties where applicable
• Internal procedures for environmental responsibility and record retention
• Corrective action records for previous environmental findings

Site Condition and Facility Observation

Document review must be supported by site observation. We check whether the factory’s environmental-control facilities are present, accessible, maintained, and used according to the documented production process. A clean document file cannot replace actual site conditions.

On site, we usually observe wastewater collection points, drainage routes, exhaust pipes, dust-control equipment, ventilation systems, noise-control measures, waste storage zones, workshop housekeeping, floor conditions, emergency containment areas, and posted environmental instructions. The goal is to determine whether the factory’s daily operation reflects controlled environmental management.

Site Area	What We Check	Typical Finding to Record
Wastewater area	Collection, treatment, discharge route, and operation records	Unclear drainage route or missing operation log
Exhaust treatment area	Equipment status, maintenance record, and outlet identification	Treatment equipment not operating during production
Workshop floor	Leakage, residues, stains, and uncontrolled discharge signs	Liquid accumulation or poor housekeeping
Waste storage point	Separation, labeling, shelter, and access control	Mixed waste or missing identification
Production area	Whether the process matches approved documents	Extra process found but not reflected in records

We also check whether environmental facilities appear functional during normal production. If machines are running but exhaust treatment equipment is off, this should be recorded as a compliance risk. If wastewater treatment equipment exists but there is no recent operating log, the finding should state both the site condition and the missing record.

Site observation should be factual. The audit report should avoid vague wording without evidence. A stronger finding would state that the wastewater treatment operation log was not available for the audit date and the wastewater collection point did not show clear identification. This gives buyers usable information.

For higher-risk factories, such as dyeing, coating, printing, metal finishing, electronics, plastics, furniture finishing, or chemical-use workshops, we pay closer attention to liquid discharge routes, exhaust capture, filter replacement, sludge handling, workshop ventilation, and temporary waste control.

Production Records and Compliance Risk Points

Environmental compliance is not only about permits and site appearance. It also depends on whether the factory keeps daily records that can support continuous control. We review whether production volume, equipment operation, treatment facility logs, monitoring reports, maintenance records, and waste records are aligned.

A common audit risk is that the factory has environmental approval documents but lacks daily evidence. For example, a wastewater treatment system may exist, but the factory may not provide operation logs, sludge records, maintenance records, or monitoring results. This makes it difficult for buyers to judge whether the system is actually controlled during production.

Record Type	What It Should Support	Risk Signal
Production records	Output volume and active production process	Production scale exceeds approved or recorded scope
Treatment facility logs	Daily operation of wastewater or exhaust systems	Logs missing, incomplete, or not updated
Maintenance records	Equipment repair, filter change, and system upkeep	No evidence of regular maintenance
Monitoring records	Test results for wastewater, exhaust, or noise	Old reports or reports not matching active outlets
Corrective action records	Follow-up after previous findings	Repeated issue without documented closure

We also check whether record dates make sense. If production was active during a certain period, related environmental equipment logs should usually exist for the same period. If monitoring reports are available but do not cover the current production process or active discharge point, the finding should be treated as a document-control and compliance-risk issue.

For buyers, the most useful audit output is a clear risk classification. Our report should separate missing evidence, expired documents, inconsistent site conditions, uncontrolled areas, and corrective action gaps. These should not be mixed into one general statement.

• Missing or expired environmental documents
• Approved scope inconsistent with actual production
• Environmental-control equipment not observed in normal operation
• Daily logs unavailable or incomplete
• Monitoring report not recent or not matched to active discharge points
• Previous environmental findings not closed with evidence
• Waste or wastewater records not traceable

Chemical Storage

Chemical storage in a factory audit should be checked through inventory control, container labeling, storage zoning, ventilation, secondary containment, Safety Data Sheets, and spill-response readiness. We review whether chemicals used in production, cleaning, maintenance, printing, coating, surface treatment, or laboratory work are listed, identified, and stored according to risk level. For buyers, the main concern is whether the supplier can control chemical-related environmental and safety risks during normal production. A practical audit should compare at least four evidence types: chemical list, on-site containers, SDS files, and emergency control records.

Chemical Inventory and Label Check

Chemical inventory review should start with a complete list of chemicals used or stored in the factory. We check whether the list covers raw chemicals, solvents, adhesives, inks, paints, oils, cleaning agents, laboratory reagents, and maintenance chemicals. A useful inventory should include product name, supplier name, usage department, storage location, approximate quantity, hazard type, and update date.

The inventory should match actual site conditions. If our team observes containers in the workshop, warehouse, maintenance room, or temporary storage area that are not listed in the inventory, this should be recorded as a document-control gap. For buyers, unlisted chemicals may indicate weak internal control, especially in factories using coatings, printing, dyeing, metal finishing, electronics assembly, furniture finishing, or plastic processing.

Inventory Item	Audit Focus	Risk Signal
Chemical name	Matches container label and SDS	Generic or unclear name used
Storage location	Matches actual site location	Chemical found outside listed area
Quantity record	Updated according to use and storage	Large quantity on site but not recorded
Hazard type	Flammable, corrosive, toxic, irritant, oxidizing, or other category	Hazard category missing
Responsible department	Clear ownership for storage and use	No responsible department shown
Update date	Recent enough to reflect current production	Old list not matching current operation

Label control is equally important. We check whether containers have clear labels showing the chemical name, hazard information, handling warning, and identification matching the inventory. Original containers are usually easier to trace, while transferred chemicals in secondary bottles, buckets, or smaller containers often create labeling problems.

Unlabeled or relabeled containers should not be ignored. A bottle marked only with “cleaner,” “oil,” or “solvent” does not give enough information for safe storage, use, or emergency response. The report should state the location, container type, approximate quantity, and missing label information.

• Chemical inventory covers all storage and use areas
• Inventory matches actual containers observed on site
• Chemical names are consistent across inventory, label, and SDS
• Secondary containers are labeled and not left unidentified
• Hazard information is visible and understandable
• Expired, damaged, leaking, or abandoned containers are recorded
• Restricted or high-risk chemicals are separately controlled where applicable

Storage Area Segregation and Ventilation

Chemical storage areas should be separated from general materials, finished goods, food areas, office areas, and uncontrolled production zones. We review whether the supplier has dedicated storage space, visible identification, access control, suitable shelving, spill containment, and clear separation by chemical compatibility.

Segregation means more than placing chemicals in one room. Flammable liquids, oxidizers, acids, alkalis, corrosive materials, oils, adhesives, and cleaning agents should not be mixed without control. If incompatible chemicals are stored together, leakage or reaction risk can increase. The audit should record whether chemicals are grouped by type, placed on stable shelves, and kept away from heat, ignition sources, floor drains, and direct sunlight.

Storage Control Point	What We Check	Common Nonconformity
Area identification	Chemical room or cabinet clearly marked	No sign or unclear storage boundary
Segregation	Different hazard types separated	Acid and alkali stored together
Ventilation	Natural or mechanical ventilation available	Strong odor or enclosed storage area
Secondary containment	Trays, bunds, or spill pallets used where needed	Containers placed directly on floor
Fire and heat control	Kept away from ignition or high-temperature areas	Flammable chemicals near heat source
Housekeeping	No leakage, residue, or blocked access	Stained floor or obstructed passage

Ventilation should be checked according to the chemical type and storage condition. Strong odor, sealed rooms without airflow, blocked exhaust fans, or chemical vapor accumulation may indicate poor storage control. For factories using solvents, inks, adhesives, paints, coatings, or cleaning agents, ventilation is a higher-priority audit point.

We also check whether the chemical storage area has practical physical controls. These may include spill trays, absorbent materials, fire extinguishers suitable for the storage area, warning signs, grounded storage for flammable materials where applicable, and restricted access. The report should describe actual observed conditions rather than making broad claims.

If chemicals are stored in workshops for daily use, the amount should be limited to reasonable operating needs. Excessive quantities at workstations may increase leakage, fire, odor, and housekeeping risk. We usually record whether workshop chemicals are labeled, capped, placed in trays, and returned to the correct storage area after use.

Safety Data Sheet and Spill Control Review

Safety Data Sheets are a core document in chemical storage review. We check whether SDS files are available for chemicals stored or used by the factory, whether they match the actual chemical names, and whether the files are accessible to relevant departments. SDS documents should not be kept only as unused paperwork; they should support labeling, storage segregation, personal protection, spill response, and emergency planning.

The SDS file should match the chemical inventory. If the inventory lists 30 chemicals but SDS files are available for only part of them, the report should record the gap. If the SDS name does not match the container label, this also creates traceability risk. For imported chemicals, translated or locally understandable safety information may be needed depending on factory practice and audit requirements.

SDS Review Point	Audit Focus	Risk if Weak
SDS availability	SDS exists for chemicals on site	Emergency response information may be missing
SDS matching	Chemical name matches label and inventory	Wrong document may be used
Hazard information	Storage, PPE, first aid, and spill response covered	Handling risk may not be understood
Accessibility	Available near storage or use area, or at a controlled document point	SDS exists but does not support daily operation
Update control	Current version retained where possible	Outdated information may be used

Spill control review should cover both equipment and records. We check whether the supplier has spill kits, absorbent materials, collection containers, warning signs, and procedures for leakage or accidental release. For liquid chemicals, secondary containment is especially important because leakage can spread to floors, drains, wastewater channels, or adjacent material areas.

A spill-control system should be practical. A written procedure without absorbent material, containment tools, or responsible follow-up is not enough. We review whether the factory can show how spilled material would be contained, collected, labeled, temporarily stored, and transferred for proper handling.

• Spill kits or absorbent materials are available near high-risk storage areas
• Liquid chemicals are stored with trays, bunds, or other containment where needed
• Floor drains near chemical areas are controlled or protected where applicable
• Emergency contact and response procedure are posted or available
• Used absorbent materials are managed as waste according to contamination type
• Spill or leakage incidents, if any, have follow-up records
• Corrective actions are documented after repeated leakage or storage findings

Waste Handling

Waste handling in a factory audit should be reviewed through classification, temporary storage, operating records, disposal traceability, and corrective action follow-up. We check whether the supplier separates general waste, recyclable waste, production residues, sludge, used containers, and hazardous waste according to the actual production process. A practical review should compare at least five evidence points: site storage area, waste labels, waste inventory, transfer records, and contractor qualification documents. For buyers, weak waste control may indicate environmental compliance risk, poor process discipline, and limited traceability after waste leaves the factory.

Waste Classification and Temporary Storage

Waste classification is the first control point in waste handling. We review whether the factory has a documented waste list that matches its real production activities, including scrap materials, rejected components, packaging waste, used oil, chemical-contaminated rags, empty chemical containers, sludge, dust, filters, and wastewater treatment residues.

The factory should separate waste by type and risk level. General waste, recyclable materials, production residues, and hazardous waste should not be mixed in the same area without clear identification. For factories using chemicals, coatings, printing, dyeing, metal processing, plastics, electronics, or surface treatment, waste classification should be checked more carefully because contaminated waste can create higher environmental risk.

Waste Type	What We Check	Common Risk Signal
General waste	Separation from production and hazardous waste	Mixed waste bins without labels
Recyclable waste	Cardboard, plastic, metal, fabric, or paper separated	Recyclables stored with contaminated waste
Production residues	Scrap material and defective process waste identified	Residues placed directly on floor
Hazardous waste	Labeled, separated, and controlled	Hazardous waste mixed with ordinary waste
Sludge or filters	Source and handling method recorded	No record of generation or transfer
Used containers	Empty chemical drums, bottles, or buckets controlled	Containers stored without identification

Temporary storage areas should be clearly marked, covered where necessary, and protected from leakage, rainwater, wind dispersion, and unauthorized access. We check whether the storage area has signs, labels, floor protection, secondary containment for liquid waste, and enough separation between incompatible waste types.

A temporary waste area should not become an uncontrolled dumping point. If waste is piled without categories, labels, dates, or transfer records, the audit should record the location, waste type, visible condition, and potential traceability gap.

• Waste categories are defined according to factory process
• Waste bins or storage areas are labeled clearly
• Hazardous waste is separated from general waste
• Liquid waste has leakage prevention or secondary containment
• Temporary storage areas are clean, covered, and controlled where needed
• Waste generation dates or storage records are available where applicable
• Waste containers are closed, stable, and not damaged
• Waste does not block emergency routes, drains, or production passages

Wastewater, Sludge, and Air Emission Records

Waste handling is closely connected with wastewater treatment, sludge generation, and air emission control. During an environmental audit, we review whether the factory keeps records that show how these waste streams are generated, treated, monitored, and transferred. The key issue is whether the records match the actual site conditions.

For wastewater, we check whether the factory has wastewater collection points, treatment equipment, discharge routes, operation logs, maintenance records, and monitoring reports where applicable. If production is active but wastewater treatment records are missing for the same period, this should be recorded as an evidence gap.

Record Type	What It Should Show	Risk if Missing or Inconsistent
Wastewater operation log	Daily treatment equipment operation	Treatment system may not be controlled
Wastewater monitoring report	Test results for relevant discharge points	No proof of discharge quality control
Sludge generation record	Source, quantity, date, and storage location	Sludge handling may not be traceable
Sludge transfer record	Quantity and disposal route	Disposal process may be unclear
Air emission monitoring record	Exhaust outlet testing and control status	Emission control evidence may be weak
Filter or dust collection record	Replacement, cleaning, or collection frequency	Collected waste may not be managed properly

Sludge is a frequent weak point in supplier audits. If the factory has wastewater treatment equipment, sludge is usually generated during operation. We check whether sludge is classified, stored, labeled, weighed or estimated, and transferred with supporting records. A treatment system with no sludge record may indicate incomplete waste tracking.

Air emission records should also be reviewed when the factory has painting, coating, printing, soldering, polishing, cutting, dust collection, oven heating, or exhaust treatment systems. We check whether exhaust outlets are identified, monitoring reports match the actual outlets, and used filters or collected dust are handled as waste according to their source.

The audit should compare records with site evidence. If a dust collector is observed on site, there should usually be cleaning or collection records. If exhaust treatment equipment uses filters or activated carbon, replacement records should be available. If records are outdated or do not match the active equipment, the finding should be clearly documented.

Disposal Records and Contractor Document Check

Waste disposal records are important because environmental responsibility does not end at the factory gate. We review whether the supplier can show where waste goes, who collects it, when it is transferred, what quantity is moved, and whether the disposal method matches the waste type. Traceability is the main audit focus.

For general waste and recyclable waste, the factory should usually keep collection or transfer records depending on its internal system and buyer requirements. For hazardous waste, records should be more controlled, including classification, temporary storage, transfer documents, receiving party information, and disposal evidence where applicable.

Disposal Evidence	Audit Focus	Buyer Risk if Weak
Waste transfer record	Date, waste type, quantity, and receiving party	Waste route is not traceable
Hazardous waste ledger	Generation, storage, and transfer status	Hazardous waste control may be incomplete
Contractor qualification	Whether the contractor is suitable for the waste type	Waste may be handled by an unsuitable party
Disposal agreement	Scope of service and waste category covered	Contract may not cover actual waste generated
Receiving confirmation	Evidence that waste was collected or received	Transfer cannot be verified
Corrective action record	Follow-up after previous waste findings	Repeated nonconformity may continue

Contractor document review should be specific. We check whether the contractor’s service scope matches the waste generated by the factory. A contractor approved for ordinary waste does not automatically cover hazardous waste, sludge, used solvent, contaminated packaging, or chemical residues. The report should state if the document scope does not match the observed waste type.

We also review whether disposal records are continuous. If a factory produces wastewater sludge monthly but has no transfer record for several months, the audit should question where the sludge was stored or handled. If hazardous waste storage is full but recent transfer records are unavailable, this should be recorded as a traceability and storage-control risk.

Corrective action follow-up should focus on evidence, not promises. If the supplier needs improvement, useful evidence may include updated waste classification lists, labeled storage-area photos, revised waste ledgers, recent transfer records, contractor qualification documents, monitoring reports, and closure records for specific findings.

• Waste disposal records match actual waste types observed on site
• Hazardous waste records show generation, storage, transfer, and receiving evidence
• Contractor documents cover the correct waste category and service scope
• Disposal records include date, quantity, waste name, and receiving party
• Temporary storage quantity is reasonable compared with transfer records
• Previous waste-related findings have documented corrective actions
• Updated photos and records are available after improvement
• Our office team organizes follow-up evidence and notes remaining gaps for client-side report review