Water Pollution and Spill Response

Why Water Pollution and Spill Response Matters

Water is the receiving medium for an enormous share of industrial, commercial, and accidental releases. A single drum of oil tipped near a storm drain, a corroded above-ground tank, a hose failure during a fuel transfer, or an uncontrolled firefighting runoff event can contaminate surface water, groundwater, and drinking-water supplies within minutes. For the safety professional, this topic matters for three reasons:

1. Legal liability. The Clean Water Act (CWA), the Oil Pollution Act (OPA 90), CERCLA, EPCRA, and the Safe Drinking Water Act (SDWA) impose strict reporting deadlines, permit conditions, and civil and criminal penalties. Failure to report a spill to the National Response Center can be a federal offense regardless of whether the spill caused harm.
2. Worker safety. Spill response is a HAZWOPER-regulated activity (29 CFR 1910.120). Untrained workers attempting to contain a chemical release are a leading cause of secondary injuries during emergencies.
3. Environmental and community protection. Oil and chemical releases destroy aquatic ecosystems, foul municipal intakes, and erode public trust in a facility.

On the BCSP ASP exam, this content falls under the Environmental Management domain. Candidates are expected to know the governing regulations, the technical definitions, the elements of a spill plan, and the logical sequence of response actions. Questions tend to be scenario-based: 'A 60-gallon diesel spill reaches a creek. What is the first required action?' Knowing the framework lets you reason to the correct answer even when you have not memorized a specific number.

Part 1: What Water Pollution Is

Definition. Water pollution is the introduction of any substance or energy (including heat) into surface water or groundwater that degrades its quality so that it no longer supports its designated uses, such as drinking, recreation, aquatic life, agriculture, or industry.

Sources are categorized as:
- Point sources: discrete, identifiable conveyances such as pipes, outfalls, ditches, or channels. These are regulated by permit under the CWA.
- Nonpoint sources: diffuse runoff from agricultural land, parking lots, construction sites, and urban areas. These are harder to regulate and are addressed through best management practices (BMPs) and stormwater programs.

Major pollutant categories you should recognize:
- Oxygen-demanding wastes (organic matter) measured as BOD (biochemical oxygen demand) and COD (chemical oxygen demand). High BOD depletes dissolved oxygen (DO) and kills fish.
- Nutrients (nitrogen, phosphorus) cause eutrophication and algal blooms.
- Toxic chemicals: heavy metals (lead, mercury, chromium, cadmium), solvents, pesticides, PCBs.
- Petroleum products: oils, fuels, lubricants.
- Suspended solids and sediment measured as TSS (total suspended solids) and turbidity.
- Pathogens: bacteria, viruses, protozoa, often indicated by fecal coliform counts.
- Thermal pollution: heated cooling-water discharges that reduce DO.
- pH extremes: acidic or caustic discharges; most permits require pH between 6.0 and 9.0.

Key water quality parameters likely to appear on the exam: BOD, COD, DO, TSS, pH, turbidity, temperature, conductivity, total dissolved solids (TDS), oil and grease, and specific toxic pollutant concentrations expressed in mg/L (ppm) or micrograms/L (ppb).

Part 2: The Regulatory Framework

Clean Water Act (CWA), 33 U.S.C. 1251 et seq.
The cornerstone federal statute. Its stated goal is to restore and maintain the chemical, physical, and biological integrity of the nation's waters. Key provisions:
- Section 402 - NPDES (National Pollutant Discharge Elimination System). Any point-source discharge of a pollutant to waters of the United States requires an NPDES permit. Permits set effluent limitations, monitoring requirements, and reporting obligations (Discharge Monitoring Reports, or DMRs). States with EPA-approved programs issue the permits.
- Section 311: prohibits the discharge of oil or hazardous substances in harmful quantities. This is the statutory basis for the SPCC rule and the list of CWA hazardous substances at 40 CFR 116 with reportable quantities at 40 CFR 117.
- Section 404: dredge-and-fill permits for wetlands, administered by the U.S. Army Corps of Engineers.
- Section 307 / Pretreatment program (40 CFR 403): industrial users discharging to a Publicly Owned Treatment Works (POTW) must meet pretreatment standards so they do not upset or pass through the municipal plant. Prohibited discharges include those with pH below 5.0, flammable or explosive materials (flashpoint below 140 F), and materials that would cause interference.
- Stormwater: industrial facilities and construction sites disturbing one acre or more must obtain stormwater permit coverage and typically prepare a Stormwater Pollution Prevention Plan (SWPPP) identifying BMPs.

Sheen rule. Under 40 CFR 110, a discharge of oil is considered harmful (and therefore reportable) if it causes a sheen or discoloration on the surface of the water, violates applicable water quality standards, or causes a sludge or emulsion beneath the surface. There is no minimum gallon threshold for oil reaching navigable water; any sheen is reportable.

Spill Prevention, Control, and Countermeasure (SPCC) Rule, 40 CFR 112
Applies to non-transportation-related facilities that could reasonably be expected to discharge oil to navigable waters and that have:
- aggregate above-ground oil storage capacity greater than 1,320 gallons (counting only containers 55 gallons or larger), or
- completely buried storage capacity greater than 42,000 gallons.
Requirements include a written SPCC Plan certified by a Professional Engineer (self-certification allowed for qualified facilities with 10,000 gallons or less and no significant spill history), secondary containment sized to hold the largest single container plus sufficient freeboard for precipitation (commonly implemented as 110 percent of the largest tank), inspections and integrity testing, employee training, security, and loading/unloading area controls. Plans must be reviewed at least every five years.

Facility Response Plan (FRP)
Required under OPA 90 and 40 CFR 112.20 for facilities that could cause 'substantial harm,' generally those with total oil storage of 1 million gallons or more meeting certain risk criteria, or 42,000 gallons or more with over-water transfers. An FRP addresses worst-case discharge scenarios, response resources, and drills.

Oil Pollution Act of 1990 (OPA 90)
Enacted after the Exxon Valdez spill. Established the Oil Spill Liability Trust Fund, strengthened liability for responsible parties, required double hulls for tank vessels, and expanded federal response authority and contingency planning. OPA 90 works alongside the National Oil and Hazardous Substances Pollution Contingency Plan (NCP, 40 CFR 300), which establishes the national response organization including the National Response Team, Regional Response Teams, and the Federal On-Scene Coordinator (OSC). EPA is the lead for inland zones; the U.S. Coast Guard leads in coastal zones.

CERCLA (Superfund), 42 U.S.C. 9601, and 40 CFR 302
Establishes Reportable Quantities (RQs) for hazardous substances. Releases of an RQ or more within any 24-hour period must be reported immediately to the National Response Center at 1-800-424-8802. RQs are 1, 10, 100, 1,000, or 5,000 pounds depending on the substance. If no RQ is assigned, the default is 1 pound. Example: the RQ for sulfuric acid is 1,000 lb; for benzene it is 10 lb; for sodium hydroxide it is 1,000 lb.

EPCRA (Emergency Planning and Community Right-to-Know Act), 40 CFR 355
Section 304 requires immediate notification of the State Emergency Response Commission (SERC) and the Local Emergency Planning Committee (LEPC) for releases of Extremely Hazardous Substances (EHS) or CERCLA hazardous substances at or above the RQ that have the potential for off-site exposure. A written follow-up report is required as soon as practicable. EPCRA Section 312 (Tier II) requires annual chemical inventory reporting, and Section 313 (TRI) requires toxic release inventory reporting.

Safe Drinking Water Act (SDWA)
Regulates public water systems through Maximum Contaminant Levels (MCLs) and protects underground sources of drinking water through the Underground Injection Control (UIC) program and wellhead protection programs.

RCRA (Resource Conservation and Recovery Act)
Governs management of hazardous waste from cradle to grave. Spill cleanup residues (contaminated absorbents, soil, water) frequently become RCRA hazardous waste and must be characterized and manifested. RCRA Subtitle I regulates underground storage tanks (USTs) containing petroleum or hazardous substances, including leak detection and release reporting within 24 hours to the implementing agency.

OSHA HAZWOPER, 29 CFR 1910.120
Paragraph (q) governs emergency response to releases. Employers must have an Emergency Response Plan, use the Incident Command System, and train responders to the appropriate level:
- First Responder Awareness: recognize and notify; take no further action.
- First Responder Operations: defensive actions (diking, diverting, containing from a distance) without trying to stop the release; minimum 8 hours of training.
- Hazardous Materials Technician: offensive actions to plug, patch, or stop the release; minimum 24 hours.
- Hazardous Materials Specialist: technician-level plus specialized chemical knowledge; 24 hours plus.
- On-Scene Incident Commander: 24 hours plus command training.
Incidental spills, those that can be absorbed, neutralized, or controlled at the time of release by employees in the immediate area who are trained and equipped, are not emergency responses and do not trigger paragraph (q).

DOT Hazardous Materials Regulations, 49 CFR 171.15 and 171.16
Transportation-related releases require immediate telephone notice to the NRC under specified conditions (death, injury requiring hospitalization, evacuation, major transportation artery closure, fire, breakage, or release of radioactive or infectious materials) and a written DOT Form 5800.1 within 30 days for any unintentional release.

Part 3: How Spill Prevention Works

Prevention follows the familiar hierarchy of controls applied to environmental releases:
1. Elimination and substitution: reduce inventory, use less hazardous materials, replace solvent processes with aqueous ones.
2. Engineering controls: secondary containment (dikes, berms, double-walled tanks, containment pallets), overfill protection (high-level alarms, automatic shutoff), leak detection, closed transfer systems, drain covers, oil-water separators, storm drain valves and plugs.
3. Administrative controls: written SPCC/SWPPP plans, inspection checklists, tank integrity testing (e.g., API 653), attended transfers, drum labeling, housekeeping, preventive maintenance, and training.
4. Response readiness: strategically placed spill kits, trained personnel, drills, and pre-arranged contractor agreements.

Secondary containment sizing rule of thumb: volume must equal the largest single container plus freeboard for rain; 110 percent of the largest tank is the common design standard. For multiple tanks, containment is based on the largest tank, not the sum, unless state rules differ.

Part 4: How Spill Response Works

A reliable mental model for exam scenarios is the sequence Recognize - Protect - Notify - Contain - Control - Clean Up - Dispose - Document - Review.

1. Recognize and assess. Identify the material (SDS, labels, placards, ERG), estimate the quantity, note the location relative to drains, waterways, and ignition sources, and evaluate hazards (flammability, toxicity, reactivity). Determine whether this is an incidental spill or an emergency.

2. Protect life. Personnel safety always comes first. Evacuate or isolate the area, eliminate ignition sources, approach from upwind and uphill, and don appropriate PPE. Do not allow untrained employees to enter an IDLH or unknown atmosphere.

3. Notify. Internally, alert the emergency coordinator or incident commander. Externally, determine reporting obligations:
- Oil to navigable water (any sheen): NRC immediately.
- CERCLA hazardous substance at or above RQ in 24 hours: NRC immediately.
- EHS or CERCLA substance with potential off-site exposure: SERC and LEPC immediately, written follow-up.
- UST releases: implementing agency within 24 hours.
- NPDES permit noncompliance that endangers health or the environment: oral notice within 24 hours, written report within 5 days.
- State and local requirements are frequently stricter; many states have zero-threshold or 25-gallon reporting triggers for petroleum to land.
Exam principle: when in doubt, the conservative answer involving immediate notification is almost always correct.

4. Contain. Stop the spread. Use absorbent socks, booms, dikes, and drain covers. Protect storm drains and floor drains first, since they are the fastest pathway to surface water. On water, deploy containment booms downstream and skimmers; oil floats, so booms with proper skirt depth work for most petroleum products. Water-soluble or sinking chemicals (dense non-aqueous phase liquids, or DNAPLs, such as chlorinated solvents) cannot be boomed effectively.

5. Control the source. Close valves, right the container, transfer product to a sound container, plug or patch (technician level), or shut down the process. Defensive actions are operations level; offensive source control is technician level.

6. Clean up. Select absorbents appropriate to the material: universal, oil-only (hydrophobic), or hazmat (for aggressive chemicals). Neutralize acids and bases carefully with compatible agents (e.g., sodium bicarbonate for acids). Use non-sparking tools for flammables. Recover free product before using absorbents to minimize waste volume. Decontaminate equipment and personnel in a designated decon area.

7. Dispose. Characterize cleanup residues under RCRA (40 CFR 261). Contaminated absorbents and soil may be listed or characteristic hazardous waste (e.g., D001 ignitable, D002 corrosive). Use a licensed transporter and TSDF with a Uniform Hazardous Waste Manifest. Used oil may be managed under 40 CFR 279 if not mixed with hazardous waste.

8. Document. Record the date, time, material, quantity, cause, actions taken, notifications made (including NRC incident number), personnel involved, and disposal records. Many regulations require a written follow-up report; SPCC facilities must report to the EPA Regional Administrator within 60 days if they discharge more than 1,000 gallons of oil in a single event or more than 42 gallons in each of two events within 12 months.

9. Review and correct. Conduct a root cause analysis, update the SPCC/SWPPP/ERP, retrain, and replenish spill kits. Regulators view corrective action as evidence of good faith.

Part 5: Spill Response Equipment and Techniques

- Absorbents: pads, socks, pillows, loose granular (clay, vermiculite, peat moss), polypropylene (oil-only).
- Booms: containment booms on water; absorbent booms for thin oil films; sorbent socks around drains on land.
- Skimmers: weir, drum, disk, belt, and rope-mop types for recovering floating oil.
- Dispersants and in-situ burning: open-water techniques requiring federal OSC approval under the NCP.
- Drain covers and plugs: polyurethane mats, inflatable plugs.
- Neutralizers: for acid or base spills; check compatibility and heat generation.
- Overpack drums and salvage containers: for leaking drums.
- Vacuum trucks: for large liquid recoveries.
- PPE: selected using the EPA/OSHA Levels A through D based on respiratory and skin hazards.

Part 6: Key Numbers to Memorize

- NRC phone: 1-800-424-8802
- SPCC applicability: more than 1,320 gal above ground (containers 55 gal or larger counted) or more than 42,000 gal buried
- SPCC plan review: every 5 years; PE certification required unless qualified facility (10,000 gal or less)
- SPCC discharge report to EPA: more than 1,000 gal single event, or more than 42 gal twice in 12 months; report within 60 days
- CERCLA RQ default: 1 lb; common RQs are 1, 10, 100, 1,000, 5,000 lb; 24-hour window
- NPDES noncompliance: 24-hour oral, 5-day written
- Construction stormwater permit: 1 acre or more of disturbance
- Typical permit pH range: 6.0 to 9.0; pretreatment prohibition below 5.0
- Pretreatment flammability prohibition: flashpoint below 140 F (60 C)
- Secondary containment: largest tank plus freeboard; 110 percent rule of thumb
- HAZWOPER training: Awareness (sufficient to demonstrate competency), Operations 8 hr, Technician 24 hr, Specialist 24 hr, IC 24 hr; annual refresher 8 hr
- DOT written incident report: Form 5800.1 within 30 days
- UST release reporting: within 24 hours

Part 7: Exam Tips: Answering Questions on Water Pollution and Spill Response

Tip 1: Identify which law the question is really testing. Keywords point to specific regulations. 'Point source,' 'outfall,' 'effluent limit,' or 'permit' means CWA/NPDES. 'Oil,' 'above-ground tank,' or '1,320 gallons' means SPCC. 'Reportable quantity' or 'hazardous substance' means CERCLA. 'LEPC,' 'SERC,' or 'extremely hazardous substance' means EPCRA. 'Emergency response levels' or 'incident command' means HAZWOPER. 'POTW' or 'sewer' means pretreatment.

Tip 2: In 'first action' questions, protect people before property or the environment. If the scenario describes an uncontrolled release with unknown hazards, the correct first step is to evacuate, isolate, and assess, not to grab absorbents. If personnel are already safe, the next priority is typically stopping the flow at the source if it can be done safely, followed by protecting drains and waterways.

Tip 3: Know the difference between incidental and emergency releases. A small spill handled by trained employees in the immediate area with available materials is incidental. Anything that requires evacuation, outside responders, or poses an IDLH or significant fire hazard is an emergency triggering HAZWOPER (q).

Tip 4: Remember that there is no volume threshold for oil reaching water. If the question says the oil 'caused a sheen,' 'reached a creek,' or 'entered a storm drain that discharges to a river,' it is reportable to the NRC regardless of gallons. Do not be misled by a small-sounding quantity.

Tip 5: Watch the 24-hour rule for RQs. Reportability is based on the total amount released within any 24-hour period, not per incident. If a question gives two releases of the same substance within a day, add them.

Tip 6: Convert units before comparing to an RQ. RQs are in pounds. Questions may give gallons and specific gravity or density. Water weighs about 8.34 lb/gal. For example, 100 gallons of a liquid with specific gravity 1.2 weighs 100 x 8.34 x 1.2 = about 1,000 lb. If the solution is diluted, apply the concentration: a 50 percent solution contains half that mass of the regulated substance.

Tip 7: Distinguish defensive from offensive actions. Operations-level responders can dike, dam, divert, and cover drains. Only technicians may plug leaks, close valves inside a hot zone, or overpack leaking drums of hazardous materials. Questions about 'who may perform' a task test this distinction.

Tip 8: Know the agencies and their roles. EPA regulates inland spills and administers SPCC/NPDES (often delegated to states); the Coast Guard handles coastal zones; the Army Corps handles Section 404 wetland permits; the NRC is the single federal point of contact for spill notification; SERC and LEPC receive EPCRA notifications; the POTW receives pretreatment notifications.

Tip 9: For prevention questions, apply the hierarchy of controls. The 'best' prevention measure is usually an engineering control such as secondary containment or overfill protection rather than training or signage. If the question asks for the 'most effective' or 'first' choice, select elimination or engineering options over administrative ones.

Tip 10: Eliminate absolute or unsafe answer choices. Options such as 'wash the spill down the drain with water,' 'wait until the shift ends to report,' 'use water on a water-reactive chemical,' or 'send the nearest employee to stop the leak' are distractors. Also be wary of choices that delay notification pending management approval; regulatory clocks start when the facility becomes aware of the release.

Tip 11: Expect water-quality parameter questions. Know that high BOD lowers DO, that DO is the critical measure for aquatic life, that TSS and turbidity measure sediment, and that pH outside 6 to 9 is a common permit violation. Thermal discharges reduce DO because warm water holds less oxygen.

Tip 12: Documentation and follow-up are testable. Questions may ask what must happen after the spill is cleaned up: written follow-up report (EPCRA), 60-day SPCC report for qualifying oil discharges, 5-day written NPDES report, waste characterization and manifesting, plan amendment, and root cause analysis. Choose the answer that closes the loop.

Tip 13: Read for the pathway. Spills to land, to a sanitary sewer, to a storm sewer, and directly to surface water each have different regulatory consequences. A storm sewer almost always leads to surface water without treatment, which is why drain protection is emphasized. A sanitary sewer leads to a POTW, triggering pretreatment notification requirements rather than NPDES.

Tip 14: Use the ERG mindset for unknown materials. If the material is unidentified, the exam expects you to treat it as hazardous, establish isolation distances, approach from upwind, and identify it before committing responders.

Sample Question Walkthrough

Question: A forklift punctures a 55-gallon drum of a solvent with a CERCLA RQ of 100 pounds and specific gravity of 0.9. Approximately 40 gallons escape onto the shop floor, and about 10 gallons enter a floor drain that discharges to a nearby stream. Which of the following is required?
A. Report to the NRC only if the total release exceeds 100 gallons.
B. Report immediately to the NRC because the release exceeds the RQ.
C. No report is required because the release was contained inside the building.
D. Submit a written report to the LEPC within 30 days.

Reasoning: Compute the mass: 40 gal x 8.34 lb/gal x 0.9 = about 300 lb, which exceeds the 100-lb RQ. The release occurred within 24 hours, and a portion reached surface water. CERCLA requires immediate NRC notification once the RQ is met. Option A confuses gallons with pounds. Option C ignores that the drain discharges to a stream and that RQ reporting applies to releases to the environment. Option D states the wrong form and timing. Correct answer: B. In practice, EPCRA notification to the SERC and LEPC would likely also be required, and the stream contamination would independently trigger CWA reporting.

Summary

Water pollution and spill response on the ASP exam is a blend of regulatory recall and logical sequencing. Anchor your study on the CWA/NPDES permit framework, the SPCC rule thresholds, CERCLA and EPCRA reporting triggers, HAZWOPER response levels, and the response sequence of recognize, protect, notify, contain, control, clean up, dispose, document, and review. When a question feels ambiguous, choose the answer that protects people first, reports promptly, prevents the material from reaching water, and closes the loop with documentation and corrective action.