Texas Wastewater Class B Practice Exam 2026 – All-in-One Guide to Master Your Certification! – All Questions

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Chlorine: The Greenish-Yellow Gas You Need to Know AboutWhich gas is described as greenish-yellow, pungent, and highly toxic?Control Hydraulic Washout in Activated Sludge SystemsHow can Hydraulic Wash Out be controlled in an activated sludge system?Decoding Stormwater: Understanding Wastewater Sources for Your Texas ExamWhat type of wastewater source includes rainwater runoff?Discovering the Five Critical Components in a Wastewater Treatment PlantHow many critical components are identified in the Activated Sludge plant?Electrical Safety: Addressing Equipment Failures in Wastewater ManagementWhen an operator experiences equipment failures, what is the recommended course of action to avoid electrical shock?Essential Checks for an Activated Sludge Treatment PlantWhat needs to be checked regularly for the proper operation of an activated sludge treatment plant?Exploring the Multifaceted Role of Chlorine in Wastewater TreatmentApart from disinfection, what are other uses of chlorine in wastewater treatment?Getting to the Bottom of Hydraulic Overload in Wastewater TreatmentIf a wastewater treatment facility is experiencing hydraulic overload, what symptom might the operators observe?How Garbage Disposals Impact Wastewater SystemsWhat is the likely effect of extensive use of garbage disposals in a community on the collection system?How to Adjust Air SCFM in Your Aeration Tank: A Simple GuideWhich observation indicates that an operator should adjust the air SCFM in an aeration tank?How to Tackle Bad Odors in Wastewater Collection SystemsWhat can be added to the collection system to help mitigate bad odors?Making the Most of Treated Wastewater: A Sustainable ApproachUsing final plant effluent in cooling towers is considered what?Master Sludge Dewatering Techniques for Texas Wastewater Class B ExamWhich of the following can be used to dewater sludge?Mastering Aeration Basins for Effective Wastewater TreatmentWhat should an operator observe closely in the aeration basin?Mastering Aeration Tank Performance: The Key Factor You Can't IgnoreWhich of the following factors directly affects the aeration tank performance?Mastering Aerobic Processes in Texas Wastewater TreatmentWhich of the following practices helps maintain a healthy aerobic process in wastewater treatment?Mastering Dissolved Oxygen Levels for Wastewater TreatmentWhat should the Dissolved Oxygen (DO) levels in the aeration tank of an activated sludge plant be maintained at?Mastering Filter Flies: A Deep Dive into Trickling Filter OptimizationWhat issue in a trickling filter could be reduced by increasing the recirculation ratio?Mastering Final Clarifier Observations for Wastewater TreatmentWhat observations are essential for the final clarifier?Mastering Internal Grouting for Main Line Joint LeaksWhat is a common technique used to seal joint leaks on a main line with minimal service interruption?Mastering Nitrogen Transformation Processes in Wastewater TreatmentWhich of the following is NOT a nitrogen transformation process in the activated sludge plant?Mastering Odor Management in Texas Wastewater SystemsWhat is one effective way to reduce unpleasant odors in a collection system?Mastering Safety Protocols Before Entering Confined SpacesBefore entering a confined space, what is the first step a worker should take?Mastering Settling Quality in Activated Sludge PlantsWhat is the proper settling quality of good sludge in an activated sludge plant?Mastering Sludge Management: Understanding Drying Bed DepthsWhat is the recommended depth of sludge drawn to a drying bed?Mastering the Activated Sludge Process for Texas Wastewater Class BWhat is the expected BOD removal percentage typically achieved in the Activated Sludge process?Mastering the Activated Sludge Process: Key Control ParametersWhich are important control parameters in the activated sludge process?Mastering the Activated Sludge Process: Key Insights for Wastewater TreatmentWhat type of process is the Activated Sludge process considered?Mastering the Art of Sewer Line Cleaning: Why Hydro Jetting Takes the LeadWhich method is preferred for cleaning sewer lines?Mastering the Essentials of Organic Matter in WastewaterWhat percentage of the total solids in wastewater does organic matter typically comprise?Mastering the F/M Ratio in Activated Sludge ProcessesHow is the F/M Ratio calculated in the activated sludge process?Mastering the pH Balance in Wastewater TreatmentWhat is the typical pH range of influent entering a wastewater treatment plant?Mastering Total Suspended Solids Removal in Wastewater TreatmentWhat method is used to remove Total Suspended Solids (TSS) from wastewater?Mastering Total Suspended Solids: The Key to Accurate Wastewater TestingWhat is a critical step in testing a sample for Total Suspended Solids?Mastering Trickling Filter Efficiency: The Key to Effective Wastewater ManagementWhich test provides the best information on how efficiently a trickling filter is operating?Mastering Wastewater Flow Rate Measurements: A Key to Effective ManagementWhat is the most accurate method for determining the average wastewater flow rate in an existing sewer main?Mastering Wastewater Management: The Importance of MicroorganismsWhich of the following conditions is indicative of a properly functioning wastewater treatment process?Mastering Wastewater Operations: Preventing Sewage in HomesWhat should operators do to prevent forcing sewage into residential areas when using cleaning equipment?Mastering Wastewater Treatment: The Mechanically Raked Bar ScreenWhat common treatment device is used to separate and remove large solids from raw wastewater?Mastering Wastewater Treatment: The Power of A.C. CurrentMost pumping stations and electrical equipment in wastewater treatment commonly operate on which current type?Measuring Flow in Wastewater Treatment: Understanding the V-Notch WeirWhat is one common type of design for measuring flow in wastewater treatment?Nitrification and Its Role in the Nitrogen CycleWhich nitrogen transformation process involves the conversion of ammonium to nitrates?Nitrogen: A Silent Threat to Aquatic Life in WastewaterWhat pollutant in the effluent from the activated sludge process may create toxic conditions for aquatic life?Protecting Yourself in Texas Wastewater Collection: Essential TipsWhat is an effective way for collection system workers to prevent infection from waterborne pathogenic organisms?Recognizing Malfunctioning Pumps in Wastewater SystemsWhat is a significant indicator of a malfunctioning pump in a wastewater system?Safety First: What to Test Before Entering a ManholeBefore entering a manhole, what should operators test for?The Essential Role of Aerobic Bacteria in Wastewater TreatmentWhat is the most important role of aerobic bacteria in wastewater treatment?The Essential Role of Wastewater Plant OperatorsWhat is the primary responsibility of a wastewater plant operator?The Heart of Wastewater Management: An Operator's CommitmentWhat characteristic defines a licensed wastewater operator?The Hidden Dangers of Hydrogen Sulfide in Wastewater SystemsWhich of the following gases is potentially dangerous and may be found in lift stations and manholes?The Impact of Dissolved Oxygen Levels in Activated Sludge SystemsWhat can be a result of insufficient dissolved oxygen in an activated sludge system?The Importance of Cleaning Toward a Clear Manhole in Sewer MaintenanceWhen using Hydraulic Hydro Jetting sewer cleaning equipment, from which manhole should the operator clean toward?The Importance of Lifelong Learning for Wastewater OperatorsWhich of the following best describes a wastewater operator's commitment?The Importance of Regular Maintenance in Wastewater Treatment FacilitiesTo ensure compliance with water quality regulations, what is essential for wastewater treatment facilities?The Importance of Responsible Wastewater Management for OperatorsWhat is a consequence of neglecting duties by a wastewater operator?The Rapid and Ragged Truth About Old Sludge QualityUnder what conditions does old sludge quality settle?The Secret Behind Chloramines: A Key Player in Wastewater ManagementWhat is formed when ammonia reacts with chlorine in wastewater?The Vital Role of Bacteria in Wastewater TreatmentWhich microorganisms are considered the most numerous and important in activated sludge?The Vital Role of Surface Scrapers in Wastewater ClarifiersWhat role do surface scrapers play in clarifier operation?Trench Safety Regulations You Need to KnowAccording to OSHA regulations, when is trench safety a concern that requires protective measures?Understanding 'Bypass' in Wastewater TreatmentIn the context of wastewater, what does the term 'bypass' mean?Understanding Acceptable Uses for Reclaimed Wastewater in TexasAccording to TCEQ regulations, what are some acceptable uses for reclaimed wastewater?Understanding Activated Sludge: What You Need to KnowWhat component is NOT considered one of the critical components of an Activated Sludge plant?Understanding Acute Toxicity in Wastewater TreatmentWhat occurs during acute toxicity in wastewater treatment?Understanding Aeration in Activated Sludge SystemsIf an activated sludge system displays no aeration, what operational issue should be suspected?Understanding Aeration Problems in Wastewater TreatmentWhat is a common indicator of poor aeration in an aeration tank?Understanding Aerobic Treatment: The Bacterial Breakdown of WastewaterWhich type of treatment relies primarily on bacterial action to decompose organic matter?Understanding Air Flow Issues in Activated Sludge SystemsIn an activated sludge system, what does excessive air flow suggest?Understanding Anaerobic Bacteria in Wastewater TreatmentWhich type of bacteria cannot survive with oxygen present in the water?Understanding Anaerobic Conditions in Wastewater TreatmentWhat condition leads to the production of odors in wastewater treatment?Understanding Anaerobic Digestion: What Gases Come from Wastewater Sludge?What gases are primarily produced by the controlled anaerobic digestion of wastewater sludge?Understanding Biochemical Oxygen Demand (BOD) in Wastewater AnalysisThe Biochemical Oxygen Demand (BOD) of a sample is evaluated by measuring what?Understanding Biochemical Oxygen Demand (BOD) in Wastewater TreatmentWhat information does a Biochemical Oxygen Demand (BOD) sample provide to an operator?Understanding Biological Oxygen Demand in Wastewater ManagementWhat does BOD stand for in wastewater management?Understanding BOD Removal in Primary Sedimentation TanksA properly designed and operated primary sedimentation tank should remove what percentage of incoming BOD?Understanding BOD Testing: What It Reveals About Wastewater TreatmentHow long ago does the BOD test reflect the operation of the plant?Understanding BOD: Essential Knowledge for Wastewater TreatmentApproximately how many pounds of BOD does each person contribute to the wastewater system daily?Understanding BOD: Your Key to Mastering Wastewater TreatmentIn wastewater treatment, what does BOD stand for?Understanding Boiling Action in Aeration Tanks: What Operators Need to KnowWhat condition might an operator suspect when observing boiling action in an aeration tank?Understanding Bypass in Texas Wastewater ManagementWhat is referred to when TCEQ authorizes the discharge of untreated wastewater near a receiving stream in extreme cases?Understanding Centrifugal Pumps for Pressure Sewer SystemsWhich type of pump is most likely used for discharging into a 10-inch diameter pressure sewer main?Understanding Centrifuge Pumps: What Happens When They Lose PrimeWhat happens when a centrifuge pump loses prime?Understanding Chlorine Chemistry in Water TreatmentWhen chlorine is added to water, what acids are formed?Understanding Chronic Toxicity in Wastewater TreatmentHow is chronic toxicity defined in the context of wastewater treatment?Understanding Chronic Toxicity: A Key to Wastewater MicrobiologyDuring which condition do certain microorganisms inactivate while others continue to be effective?Understanding Common Pipe Materials for Sewer LinesWhat are the most common pipe materials used for sewer lines?Understanding Core Responsibilities of Wastewater Operators in TexasWhich aspect is NOT typically included in a wastewater operator's core responsibilities?Understanding Daily Discharge Estimate for Wastewater ManagementTo estimate the daily discharge to the collection system, what number should the population be multiplied by per person?Understanding Denitrification in Activated Sludge SystemsDenitrification in an activated sludge system occurs when there is insufficient what to maintain aerobic metabolism?Understanding Detention Time in Wastewater TreatmentWhat does detention time in wastewater refer to?Understanding Diseases from Raw Wastewater: A Closer LookWhich diseases may be caused by pathogenic organisms present in raw wastewater?Understanding Disinfection in Wastewater TreatmentWhat process is most effective in destroying protozoa that cause dysentery in wastewater treatment?Understanding Dissolved Oxygen Levels in Aeration BasinsWhat is the acceptable range for dissolved oxygen levels in the aeration basins?Understanding Excess Power Consumption in PumpsWhat could cause excessive power consumption by a pump?Understanding Excessive Air Usage in Activated Sludge SystemsIf an operator notices excessive air usage with no change in organic or hydraulic loading in an activated sludge system, what could be a possible issue?Understanding Excessive Foam in Aeration Tanks: Challenges and SolutionsWhat potential issue could arise if an aeration tank shows excessive foam buildup?Understanding Facultative Bacteria: The Versatile Microorganisms in Wastewater TreatmentFacultative bacteria can thrive in which type of conditions?Understanding Floatable Solids in Wastewater ManagementWhich of the following solids can be classified as floatable?Understanding Flow Patterns in Clarifiers for Wastewater TreatmentWhat flow pattern would have an adverse effect on the proper settling of solids in a clarifier?Understanding Force Mains Pressure Ratings in Texas Wastewater SystemsWhat is the minimum pressure rating required for Force Mains and fittings?Understanding Gould Sludge Age Calculation for Wastewater ManagementHow is Gould Sludge Age (GSA) calculated?Understanding Gould Sludge Age in Wastewater TreatmentWhat does Gould Sludge Age indicate in the activated sludge process?Understanding Gravity Flow Sewer Lines in Texas Wastewater ManagementWhat is the minimum size and grade for a gravity flow sewer line on city right-of-way?Understanding High Nitrate and Low Ammonia Levels in Wastewater TreatmentIf a municipal wastewater effluent has a high nitrate level and low ammonia level, what does this indicate?Understanding Hydraulic Loading in Trickling FiltersHow can the hydraulic loading of a trickling filter be determined?Understanding Hydraulic Loading in Wastewater TreatmentWhat does hydraulic loading refer to in a treatment process?Understanding Hydraulic Wash Out in Activated Sludge SystemsIn the activated sludge system, what does "Hydraulic Wash Out" refer to?Understanding Hydrogen Sulfide: The Silent Risk in Wastewater TreatmentWhich gas is known to be very toxic and can deaden the sense of smell?Understanding Infiltration Factors in Wastewater Collection SystemsWhat are factors that can contribute to infiltration in a collection system?Understanding Inorganic Solids in Wastewater TreatmentWhat type of solids includes materials that can be suspended or dissolved in wastewater?Understanding Inorganic Solids in Wastewater TreatmentInorganic Solids are primarily composed of which materials?Understanding Inorganic Solids in Wastewater TreatmentInorganic solids in wastewater treatment typically include which of the following?Understanding Ladder Safety in Excavation WorkIf a ladder is used in an excavation, how far must it extend above the ground?Understanding License Revocation in Texas Wastewater ManagementUnder what condition can the Texas Commission on Environmental Quality revoke an operator's license?Understanding Lift Stations and What’s Not Found in ThemWhich compound is NOT typically found in lift stations and manholes?Understanding Lift Stations in Wastewater ManagementWhen wastewater cannot flow to the treatment plant by gravity, what is typically used?Understanding Manhole Construction: From Brick and Mortar to Modern StandardsWhich material was historically used for constructing manholes but is now prohibited?Understanding Manhole Entry Access RequirementsWhat is the minimum entry access diameter required for new manholes?Understanding Mass Balance in the Activated Sludge ProcessWhat does Mass Balance in the activated sludge process refer to?Understanding Mean Cell Residence Time: A Key Component in Wastewater TreatmentWhat does Mean Cell Residence Time (MCRT) represent?Understanding Methane Levels in Digester Gas for Wastewater TreatmentWhat is the typical percentage of methane found in digester gas?Understanding Non-Biodegradable Content in Wastewater ManagementWhich of the following is considered a stable organic matter characteristic in wastewater?Understanding Non-Point Discharges for Texas Wastewater Class B ExamHow are non-point discharges characterized?Understanding Non-Settleable Solids in Wastewater TreatmentWhich type of solids are defined as small particles that do not settle?Understanding Non-Wastewater Sources in Texas Wastewater ManagementWhich of the following is an example of a non-wastewater source?Understanding Odors in Trickling Filters: What They Mean for Wastewater TreatmentWhat do offensive and objectionable odors in trickling filters usually indicate?Understanding Optimal Influent pH Levels for Wastewater TreatmentWhat is the ideal influent pH level for a wastewater treatment plant?Understanding Organic Loading in Wastewater TreatmentWhat does organic loading refer to in wastewater treatment?Understanding Organic Solids in Wastewater TreatmentWhat do organic solids in wastewater primarily consist of?Understanding Pathogenic Organisms: A Guide for Future Wastewater ProfessionalsWhat does the term 'pathogenic' refer to?Understanding Point Source Discharges in Wastewater ManagementWhat defines point source discharges?Understanding Primary Treatment in Wastewater ManagementWhat does primary treatment of wastewater typically involve?Understanding Reclaimed Water: The Importance of Color-Coding in TexasWhat color must all reclaimed water piping be?Understanding Secondary Treatment Processes in Wastewater ManagementWhat types of secondary treatment are commonly used in wastewater treatment today?Understanding Sedimentation in Wastewater TreatmentWhich process is essential to ensure a reduction in total suspended solids?Understanding Separation Distances in Sewer and Water LinesWhat is the minimum required separation distance between sewer lines and potable water lines?Understanding Settable Solids in Wastewater TreatmentWhat are Settable Solids (SS) primarily characterized by?Understanding Settling Times in Activated Sludge SystemsWhat is a typical settling time for good quality sludge in an activated sludge plant?Understanding Sewage Characteristics: What You Need to Know for the Texas Wastewater Class B ExamWhich of the following is NOT a chemical characteristic of sewage?Understanding Sewage Level Measurement in Lift StationsWhich devices can be used to determine the level of sewage in a lift station?Understanding Sewage Treatment in Stabilization PondsWhat factors are most important for providing adequate sewage treatment in stabilization ponds?Understanding Sludge Age in Activated Sludge SystemsWhen assessing sludge age in an activated sludge system, what might be a reason for shortened sludge age?Understanding Sludge Management in Activated Sludge ProcessesWhat could indicate that the sludge is being wasted excessively in an activated sludge process?Understanding Stoppages in Wastewater Collection SystemsWhat are the primary causes of stoppage in a collection system?Understanding TCEQ Enforcement Actions: Key Factors at PlayWhat factor can lead TCEQ to take enforcement action against a facility?Understanding Texas Pollution Enforcement: The Role of TCEQWhich state agency is responsible for enforcing pollution control laws in Texas?Understanding Texas Wastewater Regulations: Who’s in Charge?Which entity has the authority to control discharges in Texas?Understanding Texas Water Code: Chapter 26 and Water PollutionWhich chapter of the Texas Water Code controls water pollution?Understanding the Benefits of Fiberglass Manholes in High Groundwater AreasWhat is the major advantage of using fiberglass manholes in areas with high groundwater?Understanding the Causes of Sudsy Foam in Aeration TanksWhat condition might an operator suspect if they observe white thick billowing sudsy foam on the aeration tank in an activated sludge system?Understanding the Commonly Used Pumps in Texas Lift StationsWhich pump is most commonly used in a lift station?Understanding the F/M Ratio in Wastewater TreatmentWhat does the term F/M ratio signify in the activated sludge process?Understanding the Gases Produced During Wastewater Bacterial DecompositionDuring bacterial decomposition of organic materials in wastewater, which gases are primarily produced?Understanding the Impact of High BOD Levels in Wastewater TreatmentIn wastewater treatment, what is a consequence of high BOD levels?Understanding the Impact of High Dissolved Oxygen Levels in Aeration TanksWhat occurs when the dissolved oxygen levels are excessively high in an aeration tank?Understanding the Impact of Plugged Air Diffusers in Aeration TanksWhat does a plugged air diffuser in an aeration tank cause?Understanding the Impact of Returned Sludge in Wastewater TreatmentHow does the rate of returned sludge affect the treatment process?Understanding the Importance of Dissolved Oxygen in Wastewater TreatmentWhat is one consequence of not maintaining appropriate dissolved oxygen levels?Understanding the Importance of Grit Removal in Wastewater TreatmentGrit removal is classified as part of which wastewater treatment stage?Understanding the Importance of Monitoring Organic Loading in Wastewater SystemsIn the context of wastewater systems, why is it important to monitor organic loading?Understanding the Location of Sewer Manholes in Wastewater SystemsWhere is a sewer manhole typically located?Understanding the Minimum Chlorine Residual Requirement for Wastewater TreatmentWhat is the minimum total combined residual of chlorine required in the contact chamber after 20 minutes?Understanding the Pre-Treatment Processes of WastewaterWhich processes are included in the pre-treatment of wastewater?Understanding the Properties of Methane Gas for Wastewater ManagementWhat characteristics describe methane gas?Understanding the Risks of Inadequate Ventilation in Confined SpacesWhat is a common consequence of inadequate ventilation in a confined space?Understanding the Role of Cumminuters in Wastewater TreatmentWhat is the function of a cumminuter in wastewater treatment?Understanding the Role of Dissolved Oxygen in Wastewater TreatmentWhat is the primary source of Dissolved Oxygen in raw sewage?Understanding the Role of Temperature in Wastewater TreatmentWhat factor can greatly affect the efficiency of the activated sludge process?Understanding the Role of Trickling Filters in Wastewater TreatmentWhat type of treatment would involve the use of trickling filters?Understanding the Rotating Biological Contactor (RBC) in Wastewater TreatmentWhat is a Rotating Biological Contactor (RBC)?Understanding the Safe Withdrawal Rate of Chlorine CylindersWhat is the maximum safe withdrawal rate for a chlorine cylinder weighing 150 lbs?Understanding the Shift: Aerobic to Anaerobic Bacteria in Wastewater TreatmentWhat triggers facultative bacteria to change from aerobic to anaerobic conditions in sludge systems?Understanding the Smoke Test for Storm Drain EvaluationWhat method is best for determining whether a storm drain is connected to a sanitary sewer line?Understanding the Sources of Wastewater: A Comprehensive GuideWhat types of sources contribute to wastewater?Understanding the Texas Wastewater Class B License TimelineHow long do newly hired personnel typically have to become licensed?Understanding the Texas Water Code: Protecting Our Water ResourcesWhat does the Texas Water Code do to protect water quality and quantity?Understanding Total Dissolved Solids: What You Need to KnowTotal Dissolved Solids (TDS) are characterized as:Understanding Total Solids in Wastewater: The Key ComponentsTotal solids in wastewater are comprised of what two components?Understanding Total Suspended Solids and Water ClarityWhat does the measurement of Total Suspended Solids indicate?Understanding Total Suspended Solids: A Key Element of Water QualityWhat does Total Suspended Solids (TSS) refer to in water quality?Understanding Trickling Filters: Why Standard and High Rate MatterWhich types of trickling filters are the most common?Understanding Unavoidable Discharges in Texas Wastewater ManagementWhat would be considered an unavoidable discharge during heavy rain involving manholes and lift stations?Understanding Volatile Solids: A Key Component in Wastewater ManagementWhat are Volatile Solids (VSS) determined by?Understanding Voltage Levels in Wastewater Treatment FacilitiesWhat is a common voltage for electrical equipment in wastewater treatment?Understanding Wastewater Collection Pipe Types: What's Best for Texas?Which types of pipe are commonly used in wastewater collection systems?Understanding Wastewater Collection Systems: Key Components ExplainedWhich of the following is NOT an essential component of a wastewater collection system?Understanding Wastewater Discharge Notifications in TexasIf an accidental discharge of wastewater occurs, how soon must the responsible party notify TCEQ regional offices?Understanding Wastewater Solids ClassificationHow are solids in wastewater classified?Understanding Wastewater Treatment: What You Should KnowWhich of these methods is NOT commonly used for wastewater treatment?Unraveling Dead Spots in Aeration Tanks: A Key to Efficient Wastewater ManagementIf an operator notices dead spots in the aeration tank, what issue is likely occurring?What Causes Sewage to Turn Septic? Understanding Stoppages and Their ImpactWhat circumstance will increase the chances that sewage will turn septic?Why 4 Feet Is the Ideal Diameter for New ManholesWhat is the minimum inside diameter for new manholes?Why Aeration Tanks are the Heart of the Activated Sludge ProcessWhat is the role of the aeration tanks in the Activated Sludge Process?Why Aerobic Bacteria Love Oxygen and Its Role in Wastewater TreatmentAerobic bacteria require what element in the water for their metabolism?Why Brick is the Outdated Choice for Sewer LinesWhich material is NOT commonly used for sewer lines?Why Consistent Sunlight is Key to Stabilization PondsWhat condition is optimal for the operation of a stabilization pond?Why Lift Stations Matter in Wastewater ManagementWhat is the primary purpose of a lift station in a wastewater collection system?Why Managing Surface Scum in Clarifiers is EssentialWhat can occur if surface scum is not adequately managed in a clarifier?Why Priming Your Centrifugal Pump is Essential for EfficiencyWhat is the necessary action that must be taken for a centrifugal pump to function properly?Why Unauthorized Discharge is a Big Deal in Texas Wastewater ManagementEnforcement actions from TCEQ may take place for which violation of the Texas Water Code?

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