Chapter 1, 2 and 3

The stage 1 DBPR established an MCL of ____ for TTHM

.08mg/l

A community water system must post the Consumer Confidence Report on a publicly accessible website if it serves more than

100,000 people

The safe drinking water act defines a public water system as a supply of piped water for human consumption that has at least _____ service connections, or serves ____ or more persons 60 or more days each year

15; 25

Water systems are required to achieve at least _____ removal and/or inactivation of viruses between a point where the raw water is not subject to recontamination by surface water runoff and a point downstream before or at the first customer.

4 log

Public water systems that cannot meet the required removal of total organic compounds (TOCs) can comply if the source water TOC level is _____, calculated quarterly as a running annual average

<2.0mg/L

Where are the sampling points located for required sampling of organics (except trihalomethanes) in a community water system?

Entry points to the distribution system

Under the enhanced coagulation requirements of the DBPR, treatment plants must remove specific percentages of total organic carbon based on their source water total organic carbon and what other factor?

alkalinity level

The filter backwash recycle rule applies what sizes of system?

all sizes

Which type of pipe joint is available in both bolted and boltless flexible pipe joint designs?

ball and socket joint

Which two ions are most commonly associated with the water hardness?

calcium and magnesium

What is the cause of carbonate hardness?

calcium bicarbonate

Water meter pits are usually used in

cold climates

What is the oxidation of unprotected metal surfaces?

corrosion

A bypass valve would be used with a

gate valve

The pH of a water sample is greater than the pHs so the Langlier index?

indicates the wayer is scale forming

A regulated organic containment concentration that exceeds the MCL

is a Tier 2 violation requiring public notification within 30 days

Operators must balance satisfying regulations on the amount of certain chlorinated organic compounds with

meeting disinfection limits

If a water system collects at least 40 samples per month for the analyses of total coliforms, what percentage of total coliform positive samples are acceptable for the system to remain in compliance with the maximum containment level for total coliforms?

no more than 5%

Fuel oil will permeate which type of pipe

polyethylene pipe

Continuous chlorine residual monitoring is required where the water enters the distribution system under the Surface Water Treatment Rule when the

population served is >3,300 people

Which type of pipe joint permits flexible pipe alignment, is inexpensive to manufacture and is easy to assemble?

push on joint

A water system using conventional filtration treatment does not have to use enhanced coagulation to achieve the total organic carbon (TOC) percent removal if

the treated water quarterly running average TOC is less than 2.0mg/L

The Surface Water treatment rule does not specify which of the following treatment technology?

Chloramine disinfection

Where are the sampling points located for required sampling of natural radionuclides in a community water system?

Each entry point to the system

What is static suction lift?

In a system where the reservoir feeding pump is lower than the pump, the difference in elevation between the center line and the free water surface of the reservoir feeding the pump

A non carbonate hardness compound is

MgSO4

Which disinfectant would work best against Cryptosporidium?

Ozone

Which type of valve would be particularly useful for throttling the flow of corrosive liquids?

Pinch valve

What term refers to the reintroduction of carbon dioxide into water either during or after lime-soda ash softening?

Recarbonation

Which rule most directly guards against the presence of E. coli in the water supply?

Total coliform rule

For noncarbonate hardness to be removed, what must be added to remove the noncarbonated calcium compounds?

soda ash

When water high in calcium bicarbonate is softened by ion exchange ...

sodium bicarbonate remains in the product water

what is head loss

the amount of energy used up by water moving from one point to another

Like softening can effectively disinfect water because

the pH level is higher than 10.5