LA Water Operator study plan

Diagram the conventional surface-water treatment train and label the purpose of each unit process

Calculate chemical feed doses in mg/L and convert to pounds per day and gallons per day using the pounds formula

Differentiate coagulation, flocculation, and sedimentation by mixing energy, detention time, and target removal

Explain what a jar test measures and interpret three example jar-test result sets to select an optimum coagulant dose

Compare rapid sand, slow sand, dual-media, and membrane filtration by loading rate, backwash method, and turbidity goal

Compute filter loading rate in gpm/ft2 and backwash expansion from given tank dimensions and flow

Apply the CT concept to disinfection by calculating required disinfectant residual or contact time for a target CT value

Distinguish DBP precursor conditions and list operational levers that reduce trihalomethane and HAA formation

Explain corrosion control and pH/alkalinity adjustment as a treatment objective, not just a water-quality issue

Convert between pressure in psi, head in feet, and elevation to solve static pressure problems in a distribution system

Calculate flow velocity in a pipe from diameter and flow rate, and identify when velocity is too high or too low

Differentiate gate, butterfly, check, pressure-reducing, and altitude valves by function and typical installation location

Describe how elevated and ground storage tanks maintain system pressure and turnover, and compute tank drawdown volume

Sketch a distribution layout identifying transmission mains, loops, dead ends, and blow-off locations

Identify cross-connection hazards and select the correct backflow prevention device for a given degree of hazard

Sequence the steps of a main break response from isolation through disinfection, flushing, and bacteriological sampling

Explain flushing and valve-exercising programs and state the water-quality indicators that trigger them

Describe the purpose of each of the following distribution samples: total coliform, chlorine residual, turbidity, and lead and copper

Explain proper sampling technique, including container type, holding time, preservation, and chain-of-custody requirements

Perform chlorine residual testing calculations using DPD colorimetric and amperometric methods, and distinguish free from total chlorine

Interpret turbidity and coliform results against typical action levels and state the required follow-up response

Identify quality control practices such as duplicates, blanks, spikes, and calibration verification, and explain why each is used

Convert between common concentration units including mg/L, ppm, percent, and micrograms per liter

List the required elements of a permit-required confined space entry and identify the atmospheric hazards monitored before and during entry

Describe safe handling of chlorine gas and sodium hypochlorite, including leak detection, respiratory protection, and evacuation triggers

Select appropriate PPE for chemical, electrical, and trenching hazards and justify each selection

Explain lockout and tagout, fall protection, and trenching and excavation protective system requirements

Outline a written response for three emergency scenarios: main break with contamination risk, chemical spill, and power loss at a pump station

Map Safe Drinking Water Act requirements to operator duties, including monitoring, reporting, and public notification

Compile primary and secondary MCLs for the contaminants most frequently tested on the exam and state the associated health or aesthetic basis

Explain the content and distribution requirements of the Consumer Confidence Report and the deadlines that drive it

Identify recordkeeping, operator certification, and continuing education obligations that apply to a certified operator

Describe the process for issuing a boil water notice, including the trigger, the required language, and the rescission criteria

Re-solve every item in the error notebook and confirm why the correct answer is correct

Complete a full-length timed mock exam under test-day conditions with no references

Rank the five domains by mock-exam accuracy and build a final-week triage list for the two weakest

Practice written or verbal explanation of 10 calculation types to confirm procedural fluency, not answer recall