California wastewater operator continuing education
California requires no continuing education to renew a wastewater operator licence, so these courses are training for its own sake. You still get a certificate of completion with the hours on it, which an employer or another state's board can see.
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Maintenance Chemicals: Grout, Paint and Fuel
Workers sometimes handle grout, paint, or fuel without recognizing the chemical hazards or following proper safety rules, which can lead to exposure and regulatory trouble. This hour helps you identify hazards, use the right protective gear, and follow safety and compliance steps during maintenance tasks.
Training certificate (no renewal hours required)
View courseRespond or Evacuate: The HAZWOPER Choice
Confusion over when to handle hazardous spills in-house or evacuate can put employees at risk and violate safety rules. This hour shows how to recognize the right response under OSHA's HAZWOPER standard and what protective gear and steps to follow during emergencies.
Training certificate (no renewal hours required)
View courseLagoon Levers: What Each Change Costs
Making changes in lagoon operations without knowing their effects can cause poor effluent, sludge build-up, or higher costs. This hour helps you understand how each adjustment impacts the lagoon so you can balance quality, stability, and expenses with confidence.
Training certificate (no renewal hours required)
View coursePump Energy: Throttling, Heads and Clean Pipe
Pumping more pressure than needed or throttling pumps the wrong way wastes energy and increases costs at wastewater plants. This hour shows how to manage pump head, understand throttling effects, and spot when pipe cleaning saves energy and keeps pumps running right.
Training certificate (no renewal hours required)
View courseMotors, Nameplates and the Power Bill
To equip wastewater operators with a solid practical understanding of motor basics, interpretation of motor nameplates, electrical energy distribution in the plant, and safe, effective use of thermal detection methods—all to support operational decisions that improve reliability and energy efficiency within regulatory and practical boundaries.
Training certificate (no renewal hours required)
View courseTracer Testing a Contact Tank: t10 and Baffling
Operators often miss hydraulic problems like short-circuiting or slime buildup in contact tanks because they don't know how to run or read tracer tests. This hour shows how to perform tracer studies, interpret T10 and baffling results, and use them to improve disinfection and tank flow.
Training certificate (no renewal hours required)
View courseHazard Communication at a Treatment Plant
Every chemical on site comes with a label and a safety data sheet you're expected to understand. This hour covers what the hazard communication rules require, reading an SDS, labeling, and the protective equipment each hazard calls for.
Training certificate (no renewal hours required)
View courseActivated Sludge: Advanced Process Control
Troubles with treatment processes often come from misreading key indicators like sludge levels or oxygen readings, leading to wrong adjustments that hurt plant stability. This hour shows how to interpret critical data, diagnose common faults, and use control levers to keep the plant running steady and efficient.
Training certificate (no renewal hours required)
View coursePrimary Clarifiers: Withdrawal Rate and Septicity
Pump sludge out of the primary too slowly and it turns septic; pump it too fast and you send water to the digester. This hour covers setting the withdrawal rate and protecting the processes downstream.
Training certificate (no renewal hours required)
View courseThe Records That Win a Bypass or Upset Case
Incorrect or incomplete records during bypass or upset events can lead to permit violations and costly penalties. This hour shows how to keep clear, accurate logs and reports that meet regulations and support your plant's defense in wet weather situations.
Training certificate (no renewal hours required)
View courseTreatment Process Fundamentals
One connected hour on how a plant works, from headworks and primary clarifiers through activated sludge, secondary clarifiers, nitrification and disinfection. It covers what each stage does to the next, so a decision in one place doesn't cause a problem downstream.
Training certificate (no renewal hours required)
View courseHeadworks: What Gets Past Screens and Grit
Rags and grit that slip past the headworks show up later as plugged pumps, worn equipment and lost tank volume. This hour covers what screens and grit removal really catch, what they miss, and what that costs downstream.
Training certificate (no renewal hours required)
View courseTrickling Filters: What More Flow Buys and Costs
Operators often face trouble when increasing flow through trickling filters without understanding how it affects recirculation, sludge, and effluent quality. This hour shows how to read plant data and adjust hydraulic rates to keep the filter working well without wasting energy or causing problems.
Training certificate (no renewal hours required)
View courseClarifier Operation and Troubleshooting
Clarifiers are where many effluent problems first show. This hour covers running primary and secondary clarifiers well and troubleshooting them when they misbehave, along with the common mistakes that turn an upset into a violation.
Training certificate (no renewal hours required)
View courseRounding for Compliance: One Rule, Three Errors
Incorrect rounding and arithmetic errors can cause your compliance reports to show violations when there aren't any. This hour explains the rounding rule and common mistakes, so you can calculate and report your data accurately every time.
Training certificate (no renewal hours required)
View courseHead: What Your Pump Is Really Working Against
Pumps often run inefficiently because operators don't fully understand the system pressure and losses they work against. This hour shows how to measure total dynamic head correctly and use that knowledge to improve pump performance and spot common system issues.
Training certificate (no renewal hours required)
View courseCan You Still Reach It? Shutoffs, Air and Intakes
In a chemical release, an emergency plan only works if the shutoff can be reached, the air intakes don't pull the gas indoors, and the safety equipment isn't inside the hazard. This hour shows how to check your plant for all three.
Training certificate (no renewal hours required)
View courseWelding and Hot Work: The Fume You Did Not Choose
Welding and hot work can create invisible fumes and gases like ozone or phosgene that put workers at risk and cause safety problems at the plant. This hour shows how to spot these hazards, handle gases safely, and follow proper ventilation and fire-watch steps.
Training certificate (no renewal hours required)
View courseClassifying Trench Soil: Two Tests, Five Traps
Misclassifying trench soil can lead to unsafe excavations and trench collapses, risking serious injury and plant damage. This hour shows how to identify soil types correctly using two tests, spot common mistakes, and follow OSHA rules to keep trenches safe.
Training certificate (no renewal hours required)
View coursePermit-Required Confined Space Entry
Wet wells, manholes and tanks are where operators die, and too often it is the person who goes in to help. This hour covers the permit, atmospheric testing (especially hydrogen sulfide), the rules, and planning the rescue before anyone enters.
Training certificate (no renewal hours required)
View courseDigester Gas: CO2, Burners and Stray Methane
To equip wastewater operators with practical understanding and skills to manage digester gas quality, ensure burner safety and maintenance, and handle stray methane hazards effectively, maintaining safe and efficient anaerobic digestion operations.
Training certificate (no renewal hours required)
View courseThe Daily Round: What To Check and What To Log
Operators often miss or misrecord key daily checks and lab data, risking plant performance and regulatory trouble. This hour shows what to inspect and log each day, how to interpret results, and how to keep accurate records that prove the plant is properly managed.
Training certificate (no renewal hours required)
View courseWastewater Operator Safety
The hazards that kill operators: confined spaces, hydrogen sulfide and other bad atmospheres, stored energy, chemicals and biological exposure. This hour covers how to recognize and control each, the right protective equipment, and why would-be rescuers are so often the second victim.
Training certificate (no renewal hours required)
View courseActivated Sludge 2: What Each Change Does
Equip operators to understand the effects of adjusting each primary control lever in activated sludge plants, including their impacts on effluent quality, process stability, sludge production, and energy use, enabling informed decisions and communication with superintendents.
Training certificate (no renewal hours required)
View courseMaintenance That Finds Faults, Not Just Grease
Just greasing pumps and motors can miss early signs of trouble, leading to unexpected breakdowns and costly repairs. This hour shows how to spot hidden faults using testing tools and proper valve care, so you can keep equipment running smoothly and avoid failures.
Training certificate (no renewal hours required)
View courseHazard Assessment: What Changes the Answer
Choosing the wrong respiratory protection or PPE in confined spaces can put operators at serious risk, especially with changing conditions and H2S levels. This hour explains how to assess hazards carefully and pick the right safety gear and actions for real-world plant situations.
Training certificate (no renewal hours required)
View courseWhat Each Bench Test Measures, and Its Traps
Operators often run bench tests without fully understanding what each one measures or where errors commonly happen, leading to confusing or misleading results. This hour explains the main test types, their usual pitfalls, and how to spot when results may not be reliable before acting on them.
Training certificate (no renewal hours required)
View courseWhat a Duplicate Can and Cannot Tell You
To deepen operators' understanding of instrument calibration nuances, quality control checks with duplicates, and their practical implications on data confidence and operational decisions.
Training certificate (no renewal hours required)
View courseInfiltration or Inflow: Telling Them Apart
Groundwater leaking in and stormwater pouring in look alike at the plant, but they behave differently and have different fixes. This hour shows how to tell them apart on your flow record and what each means at the headworks.
Training certificate (no renewal hours required)
View courseThe Bench Lab: Which OSHA Rule Covers It
Wastewater bench labs often miss key OSHA rules that lead to unsafe conditions and compliance issues. This hour shows how to identify the right standards, required safety gear, and practical steps to keep lab work safe and meet OSHA's chemical hygiene rules.
Training certificate (no renewal hours required)
View courseLockout/Tagout for Pumps, Blowers and Mixers
A pump, blower or mixer that restarts or turns over during maintenance can kill. This hour covers locking out and verifying each of these machines, step by step, to OSHA's standard.
Training certificate (no renewal hours required)
View courseCyber Duties Already in Your Emergency Plan
Operators may miss or hesitate on cybersecurity steps already included in their plant's Emergency Response Plan, leaving the plant vulnerable during an incident. This hour shows where those duties are, what operators must handle, and how to respond confidently when cyber problems arise.
Training certificate (no renewal hours required)
View courseFire Extinguishers
Many plants mix up who needs fire extinguisher training versus just basic education, leading to compliance problems and safety risks. This hour shows how to spot those mistakes, understand regulations, and make sure your plant's policies keep everyone safe and follow the rules.
Training certificate (no renewal hours required)
View courseFalls Into Tanks: The Trigger Is Not Four Feet
Many operators think fall protection rules apply only above four feet, but falls near tanks and hazardous equipment can be just as dangerous. This hour explains OSHA's real requirements, helping you spot risks and use the right guardrails, training, and safety measures to prevent falls.
Training certificate (no renewal hours required)
View coursePond Maintenance: Levees, Weeds and Burrows
Weeds, burrowing animals and weak levees are behind many costly pond failures, and all three can be caught early. This hour covers what to inspect, what is the operator's job and what is a design problem, and the routine maintenance that heads off failures.
Training certificate (no renewal hours required)
View courseThe Safety Training Calendar: What Repeats
Operators often miss or confuse safety training deadlines, risking noncompliance and unsafe work conditions. This hour explains how to track required training intervals, spot common scheduling mistakes, and understand when extra training is needed after safety events.
Training certificate (no renewal hours required)
View courseThe Lift Station Is a Flow Control, Not a Pipe
To clarify the role of lift stations as flow control devices rather than simple conduits in wet weather wastewater treatment operations, emphasizing operational best practices, maintenance duties, regulatory requirements, and the consequences of pump station failures on treatment processes and the community.
Training certificate (no renewal hours required)
View courseCalibrating the Plant Flow Meter: the Annual Job
Flow meters can drift out of calibration over the year, causing inaccurate flow readings that affect plant compliance and performance. This hour shows how to prepare for, perform, and troubleshoot the annual flow meter calibration to keep measurements reliable.
Training certificate (no renewal hours required)
View courseTrench Safety for Plant Crews: The 5-Foot Myth
Many crews believe trenches under 5 feet deep don't need special safety measures, but this can lead to dangerous accidents. This hour shows what OSHA really requires, how to spot hazards, and the right steps to keep your team safe around any trench.
Training certificate (no renewal hours required)
View courseWho May Touch It: The Electrical Boundary
Operators sometimes take on electrical tasks without knowing where the legal and safety lines are, risking injury or code violations. This hour explains what electrical work operators can safely perform, how to spot when to call an electrician, and key daily safety checks.
Training certificate (no renewal hours required)
View courseInsulation Testing: The Megger and the Trend
Electric motors and cables can fail unexpectedly if insulation problems aren't spotted early. This hour shows how to use a megger correctly, read resistance trends, avoid common testing mistakes, and stay safe while checking insulation.
Training certificate (no renewal hours required)
View courseSystematic or Random: Reading a Meter's Errors
Mistakes in flow meter readings can come from installation issues like blockage or corrosion, not just the instrument itself. This hour shows how to spot different error types, understand calibration needs, and keep meters accurate for reliable monitoring.
Training certificate (no renewal hours required)
View courseClarifier Capacity: Four Ways to Overload It
Secondary clarifiers can get overloaded in four different ways, each affecting sludge handling and effluent quality differently. This hour shows how to spot these overloads using plant data and make the right operator moves to keep the clarifier working smoothly.
Training certificate (no renewal hours required)
View courseLocal Limits: The Headworks Calculation
Plants sometimes face trouble controlling pollutants because local limits at the headworks aren't properly calculated or understood. This course breaks down the local limits formula and helps you spot issues, interpret data, and take smart first steps to keep the plant within its limits.
Training certificate (no renewal hours required)
View courseActivated Sludge Process Control
To equip wastewater operators with a thorough understanding of activated sludge process control, emphasizing operational levers, common pitfalls, troubleshooting techniques, and regulatory compliance to improve plant performance and effluent quality.
Training certificate (no renewal hours required)
View courseBloodborne Pathogens: What the Rule Covers
To clarify and demystify the regulatory scope of bloodborne pathogens as it applies to wastewater operations, distinguishing between chemical and biological hazards, explaining OSHA standards' applicability, and empowering operators with practical knowledge and decision-making skills concerning hazard recognition, PPE, hygiene, and employer responsibilities.
Training certificate (no renewal hours required)
View courseThe Operating Point: Reading a Pump Curve
To equip wastewater operators with a clear understanding of pump curves, system interaction, pump types, operational mistakes, and practical techniques for determining operating points and interpreting pump efficiency, improving safe and efficient pump operation.
Training certificate (no renewal hours required)
View courseDigester Souring: The Four Numbers and the Cure
Digesters can sour without obvious signs, leading to inefficient gas production and costly downtime. This hour shows how to spot the four key souring indicators, figure out what's causing the problem, and choose the right treatment to get your digester back on track.
Training certificate (no renewal hours required)
View courseWorking Over Water: Jackets, Buoys and Rescue
Operators working on lagoons often miss key safety rules about life jackets and rescue gear, leading to dangerous situations over water. This hour explains what gear is required, clears up common safety myths, and shows how to choose and use lifesaving equipment correctly.
Training certificate (no renewal hours required)
View courseProtecting the Process Through a Peak Flow
A peak flow can wash the biology out of your plant in hours, and it takes weeks to rebuild. This hour covers clarifier limits, the signs of solids washout, and the process-protection steps that keep the plant treating.
Training certificate (no renewal hours required)
View courseThe Approach Is Part of the Calibration
To equip wastewater treatment plant operators with a deep understanding of how flow measurement approach conditions affect calibration accuracy, enabling them to identify, inspect, and correct flow measurement errors especially during wet weather operations.
Training certificate (no renewal hours required)
View courseChemical Hygiene: Which Rule Your Lab Is Under
Wastewater lab workers often confuse OSHA's Chemical Hygiene standard with Hazard Communication rules, risking noncompliance and unsafe practices. This hour helps you recognize when the Chemical Hygiene Plan applies, read Safety Data Sheets right, and handle lab chemicals safely every day.
Training certificate (no renewal hours required)
View courseChlorine Release: Detection, Kit and First Moves
Chlorine leaks can pose serious dangers if not detected quickly or if emergency kits are misused, putting people and the plant at risk. This hour shows how to spot leaks safely, use response kits correctly, and decide when to act or evacuate for everyone's safety.
Training certificate (no renewal hours required)
View courseStandby Power: Proved Under Load, or Not Proved
A generator that starts on its weekly test can still fail when it has to carry the plant. This hour covers testing standby power under real load, the common ways it fails, and keeping the plant running through an outage.
Training certificate (no renewal hours required)
View courseImpellers, Packing and the Pump That Fights You
Pumps that run hot, leak, or wear out quickly often have the wrong impeller, bad packing care, or misaligned shafts and pipes. This hour shows how to spot these problems, maintain packing and impellers right, and keep pumps running smoothly and efficiently.
Training certificate (no renewal hours required)
View courseHydrogen Sulfide: Four Numbers, One Ceiling
To equip wastewater operators with a thorough understanding of hydrogen sulfide (H2S) hazards, exposure limits, and safe operating practices to recognize, prevent, and respond effectively to H2S risks in wastewater environments.
Training certificate (no renewal hours required)
View courseNitrification: Alkalinity, Cold and Sludge Age
Nitrification is fragile, and three things commonly knock it out: alkalinity runs out, the water gets cold, or the sludge age is too short. This hour covers watching each one and protecting the process when conditions turn.
Training certificate (no renewal hours required)
View courseWet Weather Operations for Treatment Operators
The overview course for storm season: infiltration and inflow, peak flows at the headworks, protecting the biology, and staying in compliance through the surge. Start here; the other wet-weather courses go deeper on each part.
Training certificate (no renewal hours required)
View courseStorm Modes: What To Switch and When It Is Late
Switching modes too late is one of the commonest storm mistakes. This hour covers which operating modes to change at the headworks and in the plant, the signs that tell you when, and the common timing mistakes.
Training certificate (no renewal hours required)
View courseChemical Delivery and Incompatible Storage
Equip wastewater operators with the critical knowledge and skills to safely manage chemical deliveries and incompatible chemical storage, recognize and prevent hazardous chemical reactions, and respond effectively to emergencies involving chemical mishandling or accidental releases.
Training certificate (no renewal hours required)
View courseCavitation, Suction Lift and Priming
Pumps can suffer serious damage from cavitation, suction lift problems, or improper priming, leading to costly repairs and downtime. This hour shows how to spot early warning signs, keep pumps primed correctly, and use maintenance steps to protect your equipment.
Training certificate (no renewal hours required)
View courseThe Lagoon Round: Sludge Depth and the Bottle
Operators often struggle with measuring lagoon sludge properly and missing key inspection steps that keep lagoons running smoothly and safely. This hour shows how to check sludge depth right, handle samples correctly, spot trouble during daily rounds, and stay safe working around lagoon water.
Training certificate (no renewal hours required)
View courseEngulfment, Not Gas: Two Fatal Case Studies
Two operators drowned despite passing gas tests because they were engulfed by solids in a confined space. This hour shows how to spot and avoid engulfment hazards, make safer entry decisions, and improve communication and rescue actions beyond just gas monitoring.
Training certificate (no renewal hours required)
View courseThe Baffle That Works and the One That Does Not
Wet weather can overload clarifiers, causing solids to wash out and harm biological treatment. This hour shows how to recognize clarifier limits, understand baffle types, and make smart choices to keep treatment effective during heavy flows.
Training certificate (no renewal hours required)
View courseSolids in the Effluent: Which Failure Is It?
Solids in the effluent during wet weather can come from several different failures, and each needs a different fix. This hour covers diagnosing which one you have before you act.
Training certificate (no renewal hours required)
View courseSOPs That Exist and SOPs That Get Used
To equip wastewater operators and operators-in-charge with a clear understanding of the distinction between having standard operating procedures (SOPs) and actually implementing them, and to improve administration and management practices that directly impact plant compliance and operational success.
Training certificate (no renewal hours required)
View courseReading Your NPDES Permit: What It Actually Asks
The big-picture one: what your permit requires, in its numbers and its words, and how those requirements become your monthly DMR. (For the detail of rows, units and averaging, see "Rows and Units".)
Training certificate (no renewal hours required)
View courseReading Sludge Quality: The Five Control Tests
To teach operators how to accurately assess sludge quality using the five control tests, understand how test results coordinate to guide operational levers, recognize symptoms and failure modes, and make informed process control decisions that balance effluent quality, process efficiency, sludge management, and energy use.
Training certificate (no renewal hours required)
View courseDisinfection 2: What the Dose Actually Buys
Changing chlorine dose without understanding contact time and residual levels can lead to missed disinfection targets or wasted chemicals. This hour shows how to read your plant's data, weigh trade-offs, and make smarter dose decisions that protect performance and cut costs.
Training certificate (no renewal hours required)
View courseFlow Splitting: Why One Tank Fails First
When parallel tanks get unequal flow, one fails while the others coast. This hour covers how flow-splitting structures and weirs go wrong, how to spot an uneven split, and how to correct it.
Training certificate (no renewal hours required)
View courseThe Storm Variables That Are Not Flow
Equip experienced wastewater treatment operators with a deeper understanding of non-flow storm variables affecting wet weather operations, focusing on operator-adjustable levers, tradeoffs, failure modes, and decision-making to optimize plant performance during wet weather conditions.
Training certificate (no renewal hours required)
View courseSigns and Tags: What They Legally Mean
Operators sometimes confuse signs and tags or misuse lockout/tagout tags, leading to safety risks and regulatory problems. This hour explains the legal differences, common mistakes, and how to correctly apply signs and tags to keep your plant safe and compliant.
Training certificate (no renewal hours required)
View courseThree Field Checks on a Weir or Flume
To equip wastewater treatment operators with practical knowledge and field methods to accurately measure flow over weirs or flumes and understand common errors impacting these measurements, thereby improving wet weather operation assessment and compliance reporting.
Training certificate (no renewal hours required)
View coursePond Upsets: Low DO, Odor and Turnover
Facultative ponds go wrong in predictable ways: oxygen crashes, odor and seasonal turnover. This hour covers recognizing each early and the safe, practical responses that respect what the pond was designed to do.
Training certificate (no renewal hours required)
View courseFilamentous Bulking: Cause, Cure and Mistakes
When filaments take over, settling fails and solids head for the effluent. This hour covers what causes bulking, the cures that work, and the common mistakes that make it worse or only hide it.
Training certificate (no renewal hours required)
View courseWet Weather at the Headworks: Grit and Screens
In a storm the headworks takes the hit first: screens blind and grit floods in. This hour covers running screens and grit removal through high flows so the rest of the plant stays protected.
Training certificate (no renewal hours required)
View courseWriting the Wet Weather Operating Plan
When the storm arrives is too late to decide who does what. This hour covers writing a wet-weather operating plan for your own treatment processes that meets what regulators expect and that your crew can actually follow.
Training certificate (no renewal hours required)
View courseWasting Rate, Sludge Age and the F/M Lever
Operators often struggle to balance wasting rate, sludge age, and the food-to-microorganism (F/M) ratio, leading to unstable or inefficient treatment. This hour shows how to use these levers to understand process targets and make confident adjustments for better plant performance.
Training certificate (no renewal hours required)
View courseWhen a User Claims Upset: Judging the Defence
Industrial users sometimes claim upset or bypass defences to avoid penalties, but many of these claims don't meet federal rules. This course helps operators spot when a user's claim is valid, what to look for in their paperwork, and how to respond correctly.
Training certificate (no renewal hours required)
View courseHarness, Anchor, Hook: What Fails and Why
Falls from heights at wastewater plants often happen because of using the wrong harness, anchor, or lanyard, or missing key safety checks. This hour shows how to pick the right fall protection gear, spot common mistakes, and follow OSHA rules to keep yourself safe.
Training certificate (no renewal hours required)
View courseDewatering: Choosing the Route, Reading the Belt
To equip wastewater operators with practical knowledge and decision-making skills for selecting appropriate sludge dewatering routes and optimizing belt filter press operation, enhancing plant efficiency and compliance.
Training certificate (no renewal hours required)
View courseWhen the Control System Cannot Be Trusted
Control system data can be wrong or misleading during failures or cyber incidents, putting plant safety at risk. This hour shows how to spot unreliable data, use backup controls, and follow the right steps to keep the plant running safely when the system can't be trusted.
Training certificate (no renewal hours required)
View courseRespirators: Hazard Assessment and IDLH
The wrong respirator in the wrong atmosphere is worse than none, because it feels safe. This hour covers assessing a respiratory hazard, recognizing an atmosphere that is immediately dangerous to life (IDLH), and choosing and using the right protection.
Training certificate (no renewal hours required)
View courseLadders at a Plant: Portable, Fixed, and 2036
To equip wastewater treatment plant operators with clear, accurate knowledge of ladder safety regulations and practical best practices, focusing on portable and fixed ladders, the 2036 fixed ladder compliance deadline, and safety behaviors essential for fall prevention in the plant environment.
Training certificate (no renewal hours required)
View courseComing soon (4) - not open for enrolment yet
These are written and approved or being approved, and still in our final review. Get an email when they open.
Rising Sludge or Bulking: Telling Them Apart
Sludge floating on the clarifier can be rising sludge or bulking, and each needs the opposite fix. This hour teaches how to tell which you have before you change anything, and the right first move for each.
Approved
DetailsIntroduction to Wastewater: Sources, Treatment
A plain-language starting point: where wastewater comes from, how a plant treats it, what a permit asks of the plant, and the basics of staying safe on the job. Useful for new operators and for anyone who wants the whole picture in one hour.
Approved
DetailsDisinfection CT: Contact Time Is Not Volume/Flow
Tank volume divided by flow can overstate your real contact time, because water short-circuits through the tank. This hour shows what actually sets contact time and how to judge whether your disinfection is really working.
Not offered
DetailsConfined Space Rescue: Why Rescuers Die Too
Many confined-space deaths are would-be rescuers who went in after the first victim. This hour covers why that happens and the non-entry rescue methods that bring people out without adding a second victim.
Not offered
DetailsOther states
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