What is 0.75 mg/L?

A water plant wants a fluoride concentration of 1 mg/L in the finished water. The raw fluoride concentration is 0.25 mg/L. Find the amount of fluoride that should be fed in mg/L.

What is 0.015 mg/L?

The action level for lead.

What is increased nutrients?

The one of the following which is most likey to cause an algae bloom (increased turbidity, increased air temperature, or increased nutrients).

What is calcium carbonate

Hard water scale is usually caused by which of the following compounds (calcium bicarbonate, calcium carbonate, magnesium carbonate)

What is methemoglobinemia (blue baby syndrome)?

The health risk associated with high levels of nitrates in drinking water.

What is 412 lbs per day?

A water plant treats 12 MGD and wants a dose of 0.75 mg/L fluoride. Determine how many lbs of fluorosilicic acid is to be fed each day.

What is 0 mg/L?

The maximum contaminant level goal (MCLG) for lead.

What is iron?

This contaminant in the following list that is most common in groundwater and forms an insoluble precipitate when oxidized. (hydrogen sulfide, methane, or iron)

What is a beaker?

This type of laboratory glassware is used primarily to mix chemicals and measure approximate volumes. (beaker, volumetric flask, graduated cylinder)

What is aluminum hydroxide (jelly-like flocc)?

When alum racts with alkalinity in the water this is formed as a result.

What is 1.33 mg/L?

A total of 5 lbs of sodium fluoride is used to treat 0.2 MGD. Find the fluoride dose in mg/L.

What is quarterly?

Turbidimeters must be calibrated at least this often.

What is 0.9- 1.3 mg/l?

The recommended range for fluoride in Tennessee.

What is Colilert?

This enzyme substrate test remains clear if no coliform is present, turns yellow if the sample is positive for total coliform, and fluoreces under UV light if the sample is positive for E. coli. The test usually takes 24 hours but an 18 hour version is available.

What is Hypochlorous acid?

Of the following, name the chemical that is the best at disinfection. (Hypochlorous acid, Hypochlorite ion, hydrochloric acid)

What is 20.16 gal/day?

A water plant produces 250 gpm. Find the feed rate for a saturator in gal/day if the dose is 1 mg/L.

What is no later than 30 days?

A Tier 2 violation requires that a public notice shall be give within this amout of time.

What is a manganese greensand filter?

This type of filter is used to treat iron and manganese by using both adsorption and oxidation.

What is 4.5?

The pH endpoint for total alkalinity.

What is chlorine?

Trihalomethanes can form when water that contains organic matter comes into contact with this substance.

What is 0.99 mg/L?

A water plant uses 9 gallons of sodium fluoride from a saturator to treat 200,000 gpd. There is 0.18 mg/L of fluoride in the raw water. Find the total concentration of fluoride in mg/L.

What is one?

For a system that collects less than 40 microbiological samples per month, this is the number of positive samples the system can have and still be in compliance with the total coliform rule.

What is 0.5 mg/L?

The amount of alkalinity in mg/L required for each 1 mg/L of alum added to produce flocc.

What is Bromcresol Green Methyl Red?

Of the following chemicals, the one that is used as an indicator when measuring total alkalinity. (EDTA, Bromcresol Green Methyl Red, or Phenolpthalein)

What is Microfiltration?

The type of low pressure membrane filtration considered an intermediate between ultrafiltration and conventional granular media filtration. Pore sizes range from 0.03 to 1.2 micron. It is an effective barrier for particles, bacteria and protozoan cysts.