MODULE 10: UNIT 1 - Water Analysis Laboratories

Question 1

It is also known as the Philippine National Standards for Drinking Water (PNSDW) of 2017

Answer 1

DOH A.O. 2017-0010

Question 2

It is also known as the Rules and Regulations Governing the Accreditation of Laboratories for Drinking Water Analysis

Answer 2

DOH A.O. 2006-0024

Question 3

What is the objectives of the Philippine National Standards for Drinking Water (PNSDW) of 2017?

Answer 3

This A.O. shall prescribe the standards and procedures on drinking-water quality to
protect public/consumer’s health.

Question 4

The PNSDW of 2017 shall apply to all drinking water service providers including?

you can just read

Answer 4

Government and private developers and operators
Bulk water suppliers
Water refilling station operators & Water vending machine operators
Ice manufacturers
All food establishments
Residential, commercial, industrial and Institutional buildings that use/supply/serve drinking water
Water testing laboratories
Health and sanitation authorities

Question 5

Physical and chemical quality of water that refers to the appearance, taste and odor of drinking-water satisfactory to the consumer

Answer 5

Acceptability

Question 6

Drinking-water supplied to water service providers or associated infrastructures including pumping stations, reservoirs, and pipe lines

Answer 6

Bulk water supply

Question 7

A person who underwent training for drinking-water sampling and certified by DOH.

Answer 7

Certified sampling personnel

Question 8

A general term referring to the presence of substances found in water that make water less desirable or unfit for drinking

Answer 8

Contamination

Question 9

Water intended for direct human consumption or for use in food preparation and related processes.

Answer 9

Drinking-water

Question 10

The analyte concentration that produces a signal sufficiently stronger than the blank, such that it can be detected with a specified level of reliability during routine operation. Typically, it is the concentration that produces the signal above the reagent water blank signal, and should have a defined precision and bias at the level.

Answer 10

Limits of Quantitation (LOQ)

Question 11

The highest level of contaminant that is allowed in drinking-water.

Answer 11

Maximum Allowable Level (MAL)

Question 12

The constituent/contaminant concentration that when processed through the complete method, produces a signal with a 99% probability that is different from the blank.

Answer 12

Method Detection Limit (MDL)

Question 13

Drinking water must be clear and does not have objectionable _____, _____, and _____.

Answer 13

Taste, Odor, and Color.

Question 14

The quality of drinking-water shall be measured in terms of its ____________, ________, ________ and _________ constituents.

Answer 14

Microbiological, Physical, Chemical, and Radiological

Question 15

Give the meaning of the acronym:

MTFT

Answer 15

Multiple Tube Fermentation Technique

Question 16

Give the meaning of the acronym:

EST

Answer 16

Enzyme Substrate Test

Question 17

Give the meaning of the acronym:

MFT

Answer 17

Membrane Filter Technique

Question 18

Give the meaning of the acronym:

CFU

Answer 18

Colony Forming Units

Question 19

Under the parameter Total Coliform, what are the standard values of the following?

MTFT
EST
MFT

Answer 19

MTFT
< 1.1 MPN/ 100 mL

EST
Absent or <1 MPN/100 mL

MFT
<1 Total Coliform colonies/ 100mL

Question 20

Under the parameter Thermotolerant Coliform/ E.coli, what are the standard values of the following?

MTFT
EST
MFT

Answer 20

MTFT
< 1.1 MPN/ 100 mL

EST
Absent or <1 MPN/100 mL

MFT
<1 Thermotolerant coliform colonies/ 100mL

Question 21

Under the parameter Heterotrophic Plate Count (HPC), what is the standard value?

Answer 21

<500 CFU/ mL

Question 22

The parameters of drinking-water quality shall be classified as?

Answer 22

Mandatory
Primary
Secondary

Question 23

What are the parameters under Mandatory drinking-water quality?

Answer 23

NTTTACEDLCP

N - Nitrate
T - Thermotolerant Coliform
T - Turbidity
T - Total Dissolved Solids
A - Arsenic
C - Color (Apparent)
E - E. coli
D - Disinfectant Residual
L - Lead
C - Cadmium
P - pH

Question 24

What are the parameters under Secondary drinking-water quality?

Answer 24

HIXZACCMOSTT

H- Hydrogen Sulfide
I - Iron
X - Xylene
Z -Zinc
A - Aluminum
C - Chloride
C - Copper
M - Manganese
O - Odor
S - Sodium
T - Taste
T - Total coliform

Question 25

What examination shall be conducted for new or newly constructed water sources?

Answer 25

Initial examination

Question 26

What examination shall be conducted for existing water sources; and shall cover microbiological, physical, chemical and radiological parameters?

Answer 26

Periodic Examination

Question 27

True or False: Only certified sampling personnel shall collect water samples for regulatory purposes.

Answer 27

True

Question 28

All water samples for regulatory purposes shall be examined only in _______________________.

Answer 28

DOH-Accredited Laboratory

Question 29

Examination of water samples for radiologic quality shall be done by the ______________________________.

Answer 29

Philippine Nuclear Research Institute (PNRI).

Question 30

What are the 3 levels of water supply service?

Answer 30

Level 1 - point source Level 2 - communal faucet system or stand post Level 3 - waterworks system

Question 31

Identify what level of water supply service is described? A protected well or developed spring with an outlet but without a distribution system as it is generally adaptable for rural areas where the houses are thinly scattered.

Answer 31

Level 1 - point source

Question 32

Level 1 - point source serves an average of ____ households with people having to fetch water from up to ______meters distance.

Answer 32

15 households 250 meters

Question 33

Identify what level of water supply service is described? A piped system with communal or public faucets.

Answer 33

Level 2 - communal faucet system or stand post

Question 34

Level 2 - communal faucet system or stand post serves ______ households within _____ meters distance

Answer 34

4-6 households 25 meters

Question 35

Identify what level of water supply service is described? A fully reticulated system with individual house connections based on a daily water demand of more than _____ Liters per person

Answer 35

Level 3 - waterworks system 100 Liters

Question 36

What is the minimum frequency of sampling for Total coliform and thermotolerant coliform/E.coli of Level 1 and Level 2?

Answer 36

Level 1 - 1 sample every 3 months Level 2 - 1 sample every month

Question 37

What is the minimum frequency of sampling for Total coliform and thermotolerant coliform/E.coli of Level 3 based on the population served? - Less than 5000 - 5000 to 100,000 - More than 100,000

Answer 37

Less than 5000 = 2 samples monthly 5000 to 100,000 = 1 sample per 5000 population + 2 additional samples monthly More than 100,000 = 1 sample per 10,000 population + 12 additional samples monthly

Question 38

What is the minimum frequency of sampling for Total coliform and thermotolerant coliform/E.coli of all buildings (residential, commercial, industrial, and institutional buildings) based on the population served? - Less than or equal to 600 - More than 600

Answer 38

Less than or equal to 600= 1 sample every other month More than 600 = 1 sample monthly

Question 39

What is the minimum frequency of sampling for Total coliform and thermotolerant coliform/E.coli of food establishments?

Answer 39

One sample every other month

Question 40

What is the minimum frequency of sampling for Total coliform and thermotolerant coliform/E.coli of ice plants?

Answer 40

One sample a month

Question 41

True or false: Level 1 needs to conduct a sampling for Heterotrophic Plate Count (HPC)

Answer 41

False - not required

Question 42

What is the minimum frequency of sampling for HPC of Level 2

Answer 42

1 sample every other month (required if treated)

Question 43

What is the minimum frequency of sampling for HPC of Level 3 based on population served? - Less than 5000 - 5000 to 100,000 - More than 100,000

Answer 43

Less than 5000 = 2 samples monthly 5000 to 100,000 1 sample per 5000 + additional 2 samples monthly More than 100,000 = Required, at least 40% of sampling points

Question 44

What is the minimum frequency of sampling for HPC of all buildings (residential, commercial, industrial, and institutional buildings) based on the population served? - Less than or equal to 600 - More than 600

Answer 44

Less than or equal to 600 = 1 sample every other month More than 600 = Once a month

Question 45

What is the minimum frequency of sampling for HPC of food establishments?

Answer 45

1 sample every other month

Question 46

What is the minimum frequency of sampling for HPC of ice plants?

Answer 46

1 sample a month

Question 47

All standard values of mandatory parameters shall be applicable to product water from refilling stations and vending machines, except for the standard values of ____ and _____________________.

Answer 47

pH Total Dissolved Solids (TDS)

Question 48

The pH value shall be ____ while the TDS levels of the product water shall not exceed _________ to validate the efficiency of reverse osmosis or distilled process.

Answer 48

5-7 10 mg/L

Question 49

Water from mobile tanks shall have chlorine residual (as free chlorine) of at least _______ but not to exceed to _______ at the point of delivery.

Answer 49

0.5 mg/L 1.5 mg/L

Question 50

Bulk water supply shall maintain chlorine residual (as free chlorine) level between ________to ________ or chlorine dioxide residual between__________ to _________ sampling requirements.

Answer 50

0.3 mg/L to 1.5 mg/L 0.2 mg/L to 4.0 mg/L

Question 51

Drinking-water service providers shall consult the ______________________________________ or __________________for the interpretations of results.

Answer 51

DOH/Local Drinking Water Quality Monitoring Committee (LDWQMC) Local health officer

Question 52

In case of exceedance of standard values of physical and chemical parameters, monitoring shall be carried out for the ________________________________

Answer 52

Next three (3) consecutive months

Question 53

In emergency water parameters, during the first _______, temporary supply of water shall be provided by the local government unit (LGU).

Answer 53

72 hours

Question 54

The _______ shall exercise its regulatory function for the initial issuance of the Certificate of Accreditation and the ____ shall be responsible for the renewal of accreditation provided that appropriate training had been given.

Answer 54

BHFS CHD

Question 55

The _______ shall conduct proficiency testing, confirmatory testing and personnel training relative to the accreditation of the laboratories.

Answer 55

NRL

Question 56

The preventive suspension shall not be more than how many days?

Answer 56

60 DAYS

Question 57

How many days can a laboratory or a personnel file a notice of appeal with the Office of the Secretary and serve a copy of the notice of appeal to the BHFS/CHD?

Answer 57

15 days

Question 58

Submitted applications that are not processed within ___________ shall be granted the Certificate of Accreditation.

Answer 58

60 days

Question 59

Freestanding laboratories shall have at a minimum of ___ sq. meter workspace requirement.

Answer 59

20

Question 60

The operation of the laboratory shall be under the direction and supervision of a competent professional who has management training and at least ________ experience in the theory and practice of procedures used in water testing.

Answer 60

3 years

Question 61

The analyst involved in the performance of laboratory procedures must have the appropriate baccalaureate degree and at least _________ experience in water testing procedures relevant to the service capability of the laboratory.

Answer 61

2 years

Question 62

The laboratory aide must have training or at least of _________ experience on clerical support and sampling.

Answer 62

6 months

Question 63

There shall be a minimum of __ laboratory personnel for each service capability. There shall be a minimum of ___ laboratory personnel for multi-service capability

Answer 63

3 personnel for each service capability 4 personnel for multi-service capability

Question 64

All laboratory records shall be retained in the premises for a minimum of ______________.

Answer 64

5 years

Question 65

The laboratory shall conduct an internal quality audit at least every ___ months.

Answer 65

6 months

Question 66

The certificate of Accreditation is valid for _______ and expires on the last day of ______________stated therein.

Answer 66

2 years December

Question 67

Failure to submit an application for renewal of accreditation within ___________ of expiration date of the current Certificate of Accreditation will result in lapse of accreditation and cancellation of registration. A new application for the issuance of accreditation shall be required before a laboratory can be allowed to operate.

Answer 67

60 days

Question 68

Failure to report in writing within ____ days of any substantial change in the condition of the laboratory (e.g. changes in the physical plant, equipment, or personnel) may be a basis for the suspension or revocation of the accreditation.

Answer 68

15 days