HAZWOPER 40-Hour / RCRA Compliance: Hazardous Waste Regulations (40 CFR Parts 260–270)

RCRA: Generator Categories, Waste Identification, Waste Codes, Manifest & TSD Requirements

Audience: working professional / trade certification candidate

RCRA (Resource Conservation and Recovery Act) provides cradle-to-grave regulation of hazardous waste — from the moment it is generated, through transport, to final disposal at a permitted TSD facility — using a strict identification hierarchy, generator-specific time and quantity limits, and a manifest system that tracks every pound of hazardous waste.

Key Points

• RCRA = Resource Conservation and Recovery Act (1976); gives EPA 'cradle-to-grave' authority over hazardous waste.
• RCRA regulations apply only to WASTE — not to products or raw materials.
• Four-step hierarchy to determine if a material is hazardous waste: solid waste → not exempt → listed → characteristic.
• Four hazardous waste characteristics (ICRT): Ignitability, Corrosivity, Reactivity, Toxicity.
• D001 = Ignitability (flashpoint <140°F); D002 = Corrosivity; D003 = Reactivity; D004–D011/D018+ = Toxicity metals/organics.
• Three generator categories: LQG (>1,000 kg/month), SQG (100–1,000 kg/month), VSQG (<100 kg/month).
• LQG: 90-day accumulation limit; unlimited quantity on-site; contingency plan required.
• SQG: 180-day accumulation limit; max 5,000 kg on-site.
• VSQG: No time limit; max 1,000 kg on-site; no contingency plan required.
• Uniform Hazardous Waste Manifest required for all off-site hazardous waste transport.
• Generator, transporter, AND TSD facility must each sign the manifest.
• Hazardous waste MUST be disposed of at a permitted TSD facility.
• Listed mixture rule: listed waste + non-hazardous = still hazardous.
• Non-listed mixture rule: characteristic waste + non-hazardous = not hazardous IF characteristics no longer exhibited.
• Derived-from rule: waste from treatment/storage/disposal of listed waste = hazardous.
• #1 RCRA violation: Lack of waste determination.

Why It Matters: RCRA compliance is the legal foundation of every hazardous waste operation — misclassifying a waste or missing an accumulation deadline creates liability for generators and can result in significant fines. Exam writers target the generator threshold numbers, the four-step identification hierarchy, and the mixture/derived-from rules because these are the daily compliance decisions that field personnel get wrong.

Terms To Remember

RCRA

Resource Conservation and Recovery Act — EPA's cradle-to-grave hazardous waste management authority.

Solid Waste

Discarded solid, liquid, semisolid, or contained gaseous material — the starting point for RCRA classification; does NOT include domestic sewage or reusable materials.

Hazardous Waste

A solid waste that is listed OR exhibits a characteristic (ignitability, corrosivity, reactivity, toxicity).

TSD (Treatment, Storage, and Disposal Facility)

Facility permitted to treat, store, or dispose of hazardous waste; all hazardous waste must go to a permitted TSD.

LQG (Large Quantity Generator)

>1,000 kg/month hazardous waste OR >1 kg/month acutely hazardous waste; 90-day limit.

SQG (Small Quantity Generator)

100–1,000 kg/month hazardous waste; 180-day limit; max 5,000 kg on-site.

VSQG (Very Small Quantity Generator)

<100 kg/month hazardous waste; max 1,000 kg on-site; no time limit.

Acutely Hazardous Waste

P-code waste — so hazardous that even <1 kg/month triggers LQG status.

Accumulation Start Date

Date hazardous waste container begins accumulating — determines when time limit clock starts; must be labeled on container.

Uniform Hazardous Waste Manifest

Document required for all off-site hazardous waste transport; signed by generator, transporter, and TSD.

D-Code

Characteristic hazardous waste code (D001–D043); assigned based on ICRT characteristics or TCLP results.

F-Code

Non-specific source listed waste — spent solvents and other industrial process wastes.

K-Code

Source-specific listed waste from specific industries (e.g., pickle liquor from steel manufacturing).

P-Code

Acutely hazardous waste — unused commercial chemical products where the listed chemical is the sole active ingredient.

U-Code

Hazardous waste from unused commercial chemical products (non-acute); sole active ingredient, unused for intended purpose.

TCLP (Toxicity Characteristic Leaching Procedure)

Test method to determine if a waste exhibits the toxicity characteristic — simulates leaching in a landfill environment.

Listed Mixture Rule

Listed hazardous waste mixed with non-hazardous material = entire mixture remains hazardous.

Non-Listed Mixture Rule

Characteristic hazardous waste mixed with non-hazardous = not hazardous IF mixture no longer exhibits the characteristic.

Derived-From Rule

Residues from treatment, storage, or disposal of listed waste = hazardous waste.

Universal Waste

Common hazardous items (batteries, lamps, electronics, pesticides; Louisiana adds antifreeze) managed under streamlined rules.

Generator Knowledge

Using SDS information or process knowledge to determine waste characterization without testing.

Land Disposal Restrictions (LDR)

Standards prohibiting land disposal of hazardous wastes unless they meet treatment standards first.

Satellite Accumulation Area (SAA)

Where hazardous waste is first generated; max 55 gallons; at or near the point of generation.

Step Process Formula

Title: Two Core Skills: 4-Step Hazardous Waste Identification Hierarchy + Generator Category Determination — Side-by-Side

Part A Waste Identification

Label: Part A — Classifying a Waste as Hazardous: 4-Step Hierarchy

Critical Rule: RCRA regulations apply ONLY to WASTE — not to products, raw materials, or reusable materials.

Four Step Hierarchy

Step 1 — Is it a SOLID WASTE?

Definition: Any discarded solid, liquid, semisolid, or contained gaseous material that has been abandoned, disposed of, or is inherently waste-like.

Not Solid Waste

• Domestic sewage.
• Materials that can be reused (per American Mining Congress v. EPA).
• Industrial discharges regulated under Clean Water Act permits.
• In-situ mining waste.
• Nuclear material regulated under the Atomic Energy Act.

If Yes: Proceed to Step 2.

If No: NOT subject to RCRA hazardous waste regulations — stop here.

Step 2 — Is it EXEMPT?

Exemptions Include

• Household hazardous waste.
• Agricultural waste used as fertilizer.
• Mining overburden returned to mine site.
• Certain oil and gas exploration wastes.
• RCRA lists 37+ specific exemptions.

If Exempt: NOT subject to RCRA Subtitle C — stop here.

If Not Exempt: Proceed to Step 3.

Key Exam Note: Household waste is exempt from RCRA Subtitle C — but a municipal facility accepting BOTH household AND industrial waste loses the exemption (Chicago v. EDF).

Step 3 — Is it LISTED?

Listed Waste Codes

F Codes: Non-specific source wastes — spent solvents, electroplating wastes, etc. Used across many industries.

K Codes: Source-specific wastes from specific industrial processes (e.g., pickle liquor from steel, wastewater from pesticide manufacturing).

P Codes: Acutely hazardous commercial chemical products — unused materials where listed chemical is sole active ingredient. Even small quantities trigger heightened regulation.

U Codes: Hazardous commercial chemical products (non-acute) — unused materials where listed chemical is sole active ingredient.

If Listed: IS hazardous waste — proceed to waste management requirements.

If Not Listed: Proceed to Step 4.

Step 4 — Does it exhibit a CHARACTERISTIC?

Four Characteristics Icrt

Code: D001

Characteristic: Ignitability

Criteria: Liquid with flashpoint <140°F; non-liquid ignites spontaneously; compressed oxidizer gas; or is an ignitable compressed gas.

Note: Flashpoint ≥140°F = combustible (not ignitable under RCRA D001).

Code: D002

Characteristic: Corrosivity

Criteria: Aqueous solution with pH ≤2 or ≥12.5; OR corrodes steel at >6.35 mm/year at 55°C.

Code: D003

Characteristic: Reactivity

Criteria: Self-reactive, water-reactive, air-reactive; generates toxic gases with water; is or contains cyanide or sulfide at certain concentrations; is capable of detonation; is an explosive.

Code: D004–D043

Characteristic: Toxicity

Criteria: TCLP test shows contaminant concentration exceeds regulatory levels. Includes 8 metals (D004–D011) and organic compounds (D018–D043).

Determination Method: TCLP (Toxicity Characteristic Leaching Procedure) — simulates leaching under landfill conditions.

If Characteristic: IS hazardous waste.

If Not Characteristic: NOT a RCRA hazardous waste — manage as solid waste.

Worked Scenarios

Used acetone from a parts-cleaning operation. Flashpoint = 0°F.

Step 1: Discarded used solvent = solid waste. ✓

Step 2: Not exempt — industrial waste. ✓

Step 3: Spent acetone = F003 (listed spent solvent). Listed waste.

Answer: Hazardous waste — F003 listed waste. Also D001 (flashpoint 0°F < 140°F).

Laboratory chemical: unused bottle of chloroform, sole active ingredient, never used for its intended purpose.

Step 1: Discarded unused chemical = solid waste. ✓

Step 2: Not exempt. ✓

Step 3: Chloroform is U-code listed (U044) — unused commercial chemical, sole active ingredient.

Answer: Hazardous waste — U044. Also D022 (chloroform TCLP toxicity code).

Battery acid (sulfuric acid, pH 0.5) drained from a forklift battery.

Step 1: Discarded liquid = solid waste. ✓

Step 2: Not exempt. ✓

Step 3: Not specifically listed in F, K, P, or U codes for this waste stream.

Step 4: pH 0.5 ≤ 2 → exhibits corrosivity characteristic = D002.

Answer: Hazardous waste — D002 characteristic waste.

Part B Generator Categories

Label: Part B — Determining Generator Category by Monthly Quantity

Generator Table

Title: RCRA Generator Category Thresholds, Time Limits & Requirements

Categories

LQG (Large Quantity Generator)

Generation Trigger: >1,000 kg (2,200 lbs.) of hazardous waste per month OR >1 kg (2.2 lbs.) of acutely hazardous waste per month

On Site Quantity Limit: Unlimited

Accumulation Time Limit: 90 days — hazardous waste must be shipped off-site

Universal Waste Time Limit: 180 days

Required Programs

• Written contingency plan with emergency coordinator.
• Quick reference guide (emergency procedures).
• Personnel training records (documented).
• Emergency arrangements with local response agencies.
• Manifest for all off-site shipments.
• Biennial hazardous waste report to EPA/state.

Labeling: All containers: 'Hazardous Waste' + accumulation start date.

Aisle Space: Required — emergency response access to all containers.

SQG (Small Quantity Generator)

Generation Trigger: 100–1,000 kg (220–2,200 lbs.) of hazardous waste per month

On Site Quantity Limit: 5,000 kg (13,220 lbs.) maximum

Accumulation Time Limit: 180 days (270 days if TSD is >200 miles away)

Required Programs

• Basic emergency procedures.
• At least one emergency coordinator designated.
• Manifest for all off-site shipments.
• Personnel training.

Labeling: All containers: 'Hazardous Waste' + accumulation start date.

VSQG (Very Small Quantity Generator)

Generation Trigger: <100 kg (220 lbs.) of hazardous waste per month

On Site Quantity Limit: 1,000 kg (2,200 lbs.) maximum

Accumulation Time Limit: NO time limit

Required Programs

• Identify hazardous waste before accumulation.
• Send to appropriate facility (permitted TSD, recycler, or another VSQG consolidated facility).
• No contingency plan required.
• No manifest required for on-site management (manifest required if shipping off-site).

Labeling: Containers must be marked — 'Hazardous Waste' recommended.

Determination Scenarios

A facility generates 1,200 kg of D001 waste in January. What is their generator status?

Answer: LQG — 1,200 kg > 1,000 kg threshold. Must ship off-site within 90 days. Contingency plan required.

A facility generates 450 kg of D002 waste in March. What is their generator status?

Answer: SQG — 450 kg is between 100 and 1,000 kg. Must ship off-site within 180 days. Maximum 5,000 kg on-site.

A small shop generates 80 kg of D001 waste per month. What is their status and time limit?

Answer: VSQG — 80 kg < 100 kg threshold. Maximum 1,000 kg on-site at any time. NO time limit for accumulation.

A lab generates 0.5 kg of P-code (acutely hazardous) waste per month and 200 kg of D-code waste.

Answer: LQG — 0.5 kg of acutely hazardous waste exceeds the 1 kg/month P-code threshold? NO — 0.5 kg < 1 kg. Generator status is SQG based on 200 kg D-code waste (100–1,000 kg range). If P-code had been >1 kg, the entire facility would be LQG regardless of D-code quantity.

RCRA Waste Codes Reference

Title: RCRA Waste Codes — Key Values for Exam

Characteristic D Codes

Code: D001

Characteristic: Ignitability

Example: Spent solvents, waste fuel, paint waste with flashpoint <140°F

Code: D002

Characteristic: Corrosivity

Example: Battery acid, caustic cleaning solutions (pH ≤2 or ≥12.5)

Code: D003

Characteristic: Reactivity

Example: Reactive cyanide waste, water-reactive sodium, explosive materials

Code: D004

Characteristic: Toxicity — Arsenic

TCLP Limit Mg L: 5.0

Code: D005

Characteristic: Toxicity — Barium

TCLP Limit Mg L: 100.0

Code: D006

Characteristic: Toxicity — Cadmium

TCLP Limit Mg L: 1.0

Code: D007

Characteristic: Toxicity — Chromium

TCLP Limit Mg L: 5.0

Code: D008

Characteristic: Toxicity — Lead

TCLP Limit Mg L: 5.0

Code: D009

Characteristic: Toxicity — Mercury

TCLP Limit Mg L: 0.2

Code: D010

Characteristic: Toxicity — Selenium

TCLP Limit Mg L: 1.0

Code: D011

Characteristic: Toxicity — Silver

TCLP Limit Mg L: 5.0

Code: D018

Characteristic: Toxicity — Benzene

TCLP Limit Mg L: 0.5

Code: D022

Characteristic: Toxicity — Chloroform

TCLP Limit Mg L: 6.0

Code: D035

Characteristic: Toxicity — Methyl Ethyl Ketone (MEK)

TCLP Limit Mg L: 200.0

Listed Codes Summary

Code Series: F-codes

Description: Non-specific source — spent solvents, electroplating wastes, dioxin-bearing wastes. Common: F001–F005 (halogenated and non-halogenated spent solvents).

Code Series: K-codes

Description: Source-specific industrial wastes from specific industries. Example: K001 (bottom sediment from wood-preserving), K048 (API separator sludge from petroleum refining).

Code Series: P-codes

Description: Acutely hazardous — unused commercial chemical products. Sole active ingredient rule applies. Example: P028 (benzyl chloride), P075 (nicotine).

Code Series: U-codes

Description: Non-acute hazardous commercial chemicals — unused, sole active ingredient. Example: U019 (benzene), U044 (chloroform), U159 (methyl ethyl ketone).

Top Frequent Codes In Field

• D001
• D002
• D007 (Chromium)
• D008 (Lead)
• D009 (Mercury)
• D018 (Benzene)
• D035 (MEK)
• F002
• F003
• F005

Manifest Transport TSD

Title: Manifest, Transport & TSD Facility Requirements

Manifest

Full Name: Uniform Hazardous Waste Manifest

Required When: Any off-site transport of hazardous waste.

Who Signs: Generator → Transporter → TSD facility — all three must sign.

Generator Responsibilities

• Complete and sign the manifest before shipment.
• Retain a copy.
• Ensure waste is properly labeled and packaged.
• Verify transporter has EPA ID number.

Return Copy Rule: TSD must return a signed copy to generator — if generator does not receive copy within 35 days (LQG) or 60 days (SQG), exception report must be filed with EPA.

Key Exam Fact: Both shipper AND receiver must retain copies of the completed manifest.

Transport Requirements

• All hazardous waste transporters must have an EPA identification number.
• DOT placards required based on hazard class and quantity — determined by DOT regulations (49 CFR).
• DOT four-digit UN/NA identification number must be displayed for the specific hazardous material.
• Waste must be in DOT-compliant containers appropriate for the hazard class.
• Transporter may not store waste for more than 10 days without a storage permit.

TSD Requirements

• Hazardous waste MUST be disposed of at a PERMITTED TSD facility — no exceptions.
• TSD facilities operate under RCRA permits with strict operating standards.
• TSD must sign and return manifest copy to generator.
• Treatment, storage, and disposal at TSD subject to all RCRA Subtitle C requirements.
• Composite liner systems required for land disposal units to minimize leachate migration.

Mixture Derived From Universal Waste

Title: Mixture Rule, Derived-From Rule & Universal Waste

Mixture Rule

Listed Waste Mixed With Nonhazardous

Result: ENTIRE MIXTURE remains hazardous — listed waste is 'contagious.'

Rule Name: Listed Mixture Rule

Example: 1 gallon of F003 spent solvent mixed with 100 gallons of non-hazardous water = 101 gallons of F003 hazardous waste.

Characteristic Waste Mixed With Nonhazardous

Result: NOT hazardous IF the mixture no longer exhibits the hazardous characteristic.

Rule Name: Non-Listed Mixture Rule

Example: D002 acid neutralized with caustic — if resulting mixture has pH 7, no longer exhibits corrosivity → not D002 hazardous waste.

Burden: Generator must demonstrate the characteristic is no longer exhibited.

Derived From Rule

Definition: Residues generated from treatment, storage, or disposal of LISTED waste are deemed hazardous.

Examples

• Ash from incinerating a listed waste = hazardous waste.
• Sludge from treating listed wastewater = hazardous waste.
• Leachate from a listed waste landfill = hazardous waste.

Exception: Derived-from rule applies to LISTED wastes; residues from characteristic wastes are NOT automatically hazardous — apply the 4-step hierarchy.

Universal Waste

Definition: Category of commonly generated hazardous items with streamlined management rules — easier to manage than full RCRA regulation.

Federal Categories

• Batteries (rechargeable, lead-acid, lithium)
• Lamps (fluorescent, mercury-vapor, neon)
• Pesticides (recalled or unused)
• Mercury-containing equipment

Louisiana State Additions

• Antifreeze (LDEQ state addition)
• Electronics (state addition)

Container Requirements: Label with 'Universal Waste — [type]' and accumulation start date; keep in closed, non-leaking containers.

Broken Container Action: A universal waste container showing physical damage that could leak must be placed in a secondary container immediately.

Management Option For Lamps: Store intact in closed containers and send to a certified recycler per universal waste procedures.

LQG Time Limit: 180 days for universal waste (vs. 90 days for standard hazardous waste)

Land Disposal Restrictions Ldr

Purpose: Prohibit land disposal of hazardous wastes unless they meet EPA treatment standards first.

Notification Requirement: Generator must notify TSD of LDR applicability when shipping waste.

Treatment Options: Incineration (thermal destruction — reduces volume), chemical treatment, stabilization.

Top Violations And Labeling

Title: Top 10 RCRA Violations & Container/Labeling Requirements

Top 10 Violations Ranked

Rank: 1

Violation: Lack of waste determination — #1 violation

Description: Generator failed to determine if waste is hazardous — cannot manage waste properly without classification.

Rank: 2

Violation: HW containers not dated

Description: No accumulation start date on container — cannot enforce time limits.

Rank: 3

Violation: HW containers not marked

Description: Containers not labeled 'Hazardous Waste.'

Rank: 4

Violation: Satellite containers not at/near process or over 55 gallons

Description: SAA must be at or near point of generation; 55-gallon maximum.

Rank: 5

Violation: Satellite containers not marked

Description: SAA containers not labeled with hazardous waste identity.

Rank: 6

Violation: Inadequate contingency plan

Description: LQG contingency plan missing required elements or not updated.

Rank: 7

Violation: Used oil containers not marked

Description: 'Used Oil' label required on all used oil containers.

Rank: 8

Violation: Satellite containers not marked (repeated)

Description: See rank 5.

Rank: 9

Violation: Open containers

Description: Hazardous waste containers must be kept CLOSED except when adding or removing waste.

Rank: 10

Violation: Lack of aisle space

Description: Emergency response access must be maintained around all waste storage areas.

Container Requirements

• Store in closed, compatible container that prevents release.
• Label with 'Hazardous Waste' — must be clearly visible.
• Label with accumulation start date — triggers time limit clock.
• Container must be compatible with its contents — no reactions between waste and container material.
• Inspect containers weekly (LQG) — look for leaks, deterioration, and labeling compliance.
• Daily inspection of waste storage areas to detect leaks, drainage issues, or deterioration.
• Aisle space must be maintained for emergency response access.

Common Confusions

• Students confuse P-codes with U-codes because both apply to unused commercial chemical products — P-codes are ACUTELY hazardous; even <1 kg/month triggers LQG status for the entire facility; U-codes are standard hazardous commercial chemicals with no acutely hazardous designation; both require the listed chemical to be the sole active ingredient and to be unused for its intended purpose.
• Students confuse the listed mixture rule with the non-listed mixture rule because both involve mixing waste — listed waste mixed with non-hazardous = ALWAYS hazardous (the listed code is contagious regardless of dilution); characteristic waste mixed with non-hazardous = NOT hazardous if the characteristic is no longer present (generator must demonstrate this); the type of waste code drives completely different outcomes.
• Students confuse accumulation time limits across generator categories because all three categories have different rules — LQG = 90 days for hazardous waste (180 for universal waste); SQG = 180 days; VSQG = NO time limit; missing the LQG 90-day deadline is one of the most common and expensive RCRA violations.
• Students confuse the derived-from rule as applying to all wastes because any waste from a hazardous process seems hazardous — the derived-from rule applies ONLY to LISTED wastes; residues from treating or disposing of characteristic wastes are NOT automatically hazardous; apply the 4-step identification hierarchy to determine if the residue independently qualifies as hazardous.

Quick Questions

A facility mixes 5 gallons of F003 listed waste with 50 gallons of non-hazardous wastewater to dilute it. Is the resulting 55-gallon mixture hazardous?

Correct Answer: Yes — the Listed Mixture Rule applies. Any mixture containing a listed waste remains hazardous regardless of dilution. The entire 55-gallon mixture carries the F003 code and must be managed as hazardous waste. Dilution is not a treatment method under RCRA — it is prohibited as a substitute for proper treatment (land disposal restrictions apply).

A facility generates 950 kg of D001 waste in April, 1,050 kg in May, and 85 kg in June. What is their generator status each month?

Correct Answer: April: SQG (950 kg is between 100–1,000 kg — 180-day limit, max 5,000 kg on-site). May: LQG (1,050 kg > 1,000 kg — 90-day limit, contingency plan required). June: VSQG (85 kg < 100 kg — no time limit, max 1,000 kg on-site). Note: generator status is determined month-by-month based on actual generation; a facility can change categories between months.

A facility generates a residue from incinerating K-coded (listed) hazardous waste. Is the ash hazardous under RCRA?

Correct Answer: Yes — the Derived-From Rule applies. Residues generated from treatment, storage, or disposal of LISTED waste are automatically deemed hazardous waste. Incinerator ash from K-coded waste = hazardous waste. The generator must characterize the ash, apply appropriate waste codes, and manage it as hazardous waste with manifest, time limit, and TSD disposal requirements.

Exam Answer Frame

Style: 5-mark

Question: A manufacturing facility generates 1,100 kg of D002 waste per month. Describe their generator status, accumulation requirements, and three mandatory program elements they must have in place.

Model Answer: Generator status: LQG (Large Quantity Generator) — 1,100 kg per month exceeds the 1,000 kg/month threshold for hazardous waste. Accumulation requirements: (1) Time limit — hazardous waste must be shipped off-site to a permitted TSD facility within 90 days of the accumulation start date; missing this deadline effectively makes the facility an unpermitted TSD, subject to significant penalties. (2) Quantity limit — no on-site quantity limit, but the 90-day clock applies to each container from its individual accumulation start date. (3) Labeling — every container must be labeled 'Hazardous Waste' with the accumulation start date clearly marked.

Three mandatory LQG program elements: (1) Written contingency plan — must identify emergency coordinators, emergency equipment, evacuation routes, and arrangements with local emergency response agencies; updated whenever operations change. (2) Personnel training records — documented training for all employees who handle hazardous waste; records retained for 3 years. (3) Emergency procedures and quick reference guide — immediately available emergency contacts, hazardous waste locations, and response procedures. Additionally, weekly container inspections, aisle space maintenance, and a Uniform Hazardous Waste Manifest for every off-site shipment are required. All waste must go to a permitted TSD facility — no exceptions.