What does TON mean?

Threshold Odor Number

How many analyses must be completed in order to determine a method detection limit?

7

What indicator may be used to measure alkalinity to an end point PH of 4.5?

Bromcresol green bormcresol green-methyl red

Chemical formula for Ammonium Hydroxide?

NH4OH

Phenolphthalein acidity is the same as?

CO2

What type of filter is used in TSS (total suspended solids)?

Glass fiber filter 2 micrometer pore size

What is required to produce defensible data of known precision and accuracy?

QA program

How is hardness expressed?

Calcium carbonate Equivalent CaCO3

What causes phenolphthalein alkalinity?

Hydroxide

MCL for fluoride?

4.0

What 2 substances interfere in the amperometric titration method?

Nitrogen trichloride Chlorine dioxide

What causes non carbonate hardness?

Sulfate, chloride, nitrate

Results from what 3 tests are expressed in calcium carbonate equivalent?

Alkalinity, acidity, and hardness

How is the MCL for TTHMs determined?

By the running average of 4 quarterly averages?

What does free chlorine include?

HOCL hydrochlorous acid OCL calcium hypochlorite

Which of the following techniques is approved for fluoride monitoring?

Ion selective electrode

Potassium chloride is used as a standard for what test?

Conductivity

What is the primary thing that should be indicated when buying stock chemical?

Analytical reagent grade

Primary concern when buying buffers?

Shelf life

How many grams of sodium thiosulfate does it take to make .025N sodium thiosulfate solution?

6.2 grams

High quality H2O has a conductance of?

0.5-3.0 umhos/cm

Type of test to determine optimum dosage?

Jar test

What type of control curve should be used (and then it named some type of chemical) for a certain type of graph paper?

Logarithmic

What is MPN?

Most probable number of organisms

Coliforms are?

Indicator organisms

MCL for iron?

.3 mg/L

When using DPD titrimetric method what chemical is used to overcome interferences?

EDTA (ethylenediaminetracletic acid)

How do you store chemicals?

By comparability, then by alphabet, according to manufacturers specifications

Another name for sodium hydroxide?

Caustic soda

Sulfer

S Atomic weight: 32

Carbon

C Atomic weight: 12

Calcium

Ca Atomic weight: 40

Potassium

K Aomic weight: 39

Sodium

Na Atomic weight: 23

Chlorine

Cl Atomic weight: 35

Aluminum

Al Atomic weight: 27

Chemical oxogen demand (COD) preservation and hold time?

28 days </= 6C PH<2 Sulfuric acid H2SO4

How to preserve COD samples?

Glass/plastic/sulfuric acid PH<2 28 days

Samples collected for nitrate/nitrite analysis preserved by?

Sulfuric acid PH<2 Plastic/glass 28 days

Total phosphorus preservation and hold time?

28 days </= 6C PH<2 Sulfuric acid H2SO4

Total kheldahl nitrogen (TKN) preservation and hold time?

28 days </= 6C PH<2 Sulfuric acid H2SO4

Nitrate (NO3)/ Nitrite (NO2) preservation and hold time?

28 days </= 6C PH < 2 Sulfuric Acid H2SO4

Oil and grease preservation and hold time?

28 days </= 6C PH < 2 Sulfuric Acid H2SO4

Ammonia preservation and hold time (NH3)

28 days </= 6C PH < 2 Sulfuric Acid H2SO4

Chlorid preservation and hold time

</ = 4C 28 days

Coliform preservation and hold time

<10C 8hrs Sodium thiosulfate (Powder in bottles to remove chlorine)

Hold time for samples you are going to analyze specific conductance on?

28 days

Dissolved oxogen (DO) hold time?

15 minutes

Ferric chloride

FeCl3

Copper Sulfate

CuSO4

Sodium Hydroxide

NaOH

Aluminum sulfate?

Al2(SO4)3 x 14.3 H2O

Acetic Acid

CH3COOH