Sampling 1
QA stands for __
more specifically, what is it
What is: Quality Assurance
System of management processes that are done to ensure that the approaches, techniques, methods & standards of quality are met.
Matrix spiked samples are ___. What do they measure
What is: adding a pure form of the containment to a QC sample or to the environment sample.
Measure accuracy or verify % of recoveries
Stratified Random Sampling is __
What is: the location/population is divided into non-overlapping strata that are even, then simple sampling is applied within each.
Blanks are__
What is: Samples collected to detect contamination during sample handling preparation, transport, analysis
Rinsate Blanks determine__
QC stands for __
more specifically what does it include
What is: quality control
System of technical activities to control & access the quality of measurements, thus control error.
1. Judgment Sampling is based on ___
2. It is applicable when___
What is: 1a. Prior information of sampling site (historical)
1b. Visual Inspection (and personal knowledge)
2a. Limited budget/time
2b. screening an area
Systematic random Sampling is__
what is: a select grid pacing using the same procedure as Systematic grid sampling, then randomly selecting sample location within each cell
NOT the middle or on lines
Field Blanks are___
What is: the "clean" sample collected in the field, transferred from one vessel to another, or exposed to the sampling environment at the sampling site
Blanks use__
What is: uses distilled water and certified clean sand for soil
1. Define Air Sampling
2. true or false: it is very straightforward for things like weather & topography
What is: 1. results of air samples collected at the same location but at different times. Can vary a lot
2. False: It is not as straightforward for things like weather & topography
Transect Sampling is__
what is: variation of systematic grid sampling
Subdividing the area into a square or triangular grids & taking samples at the nodes (#) or at a fixed location
What is: incidental or accidental contamination through this process
Define Split samples and what it is used to measure
It is used to measure precision
Composite Sampling is__
What is: estimating the average concentration not extreme conditions
Identify simple random sampling
What is: arbitrary selection of locations so that each location has the same chance of being chosen
Rinsate Blanks are__
What is: samples of analyte-free media that have been used to rinse the sampling equipment
Define Background Samples and what they are used for
Used to compare the site to the surrounding environment
define Background samples &what it is used for
What is: Samples are taken outside the sampling site and uninfluenced by the concentration zone. I
It is used to compare site to the surrounding environment
What is the equation for systematic grid sampling
L= square root of A/N
A= LxW
N=sample #