soil sampling

Question 1

Soil Sampling Equipment (6)

Answer 1

1. Dutch auger
2. soil Punch
3. Hands /Cups
4. spade/shovel
5. Pneumatic auger
6. sample recovery auger

Question 2

Problem with soil sampling contamination (4)

Answer 2

1. contamination from samplers, from sampling devices, from well construction
2. we need to decontaminate before sampling between samples, after sampling each jurisdiction (quyền hạn) has their own decontamination
3. typical decontamination involves in brushes and water
4. if looking at low-levels of hydrocarbon, need to follow up with 2xacetone and 2xhexane rinses

Question 3

Which areas are soil sampling used for?

Answer 3

1. Geological Evaluation / Characterization
2. Pollutant Migration - Vertical horizontal movment
3. Soil quality - top soil & depth for vegetation support

Question 4

soil sampling is applied for

Answer 4

1. chemical/ agriculture/ forestry analysis,

3. soil survey

Question 5

Soil properties

Answer 5

1. Naturally variable, both spatially & temporally

2. naturally heterogeneous as you move across a landscape horizon and down a profile

Question 6

VOC’s analysis characteristics

Answer 6

1. VOC’s cannot be found at the surface

2. Require to dig until located - may be on top of the water table as they are LNAPL

Question 7

Preservation of VOC’s sample (3)

Answer 7

1. zero headspaces, protect from light
2. put into glass bottles not plastic
3. methanol preservation: without methanol, a soi will lose 50% of VOC’s within 2hrs, 90% within 24hrs

Question 8

what kind of sampling for max [ ]

Answer 8

take a grab/discreet sample, not a composite/ integrative

Question 9

Particle size is used to determine what?

Answer 9

D50 analysis

Question 10

D50 infor is used for what (5)

Answer 10

1. Effective porosity
2. soil types
3. define soil horizons
4. assess soil permeability
5. assess pollutant migration - determine the behavior and transport of chemical thru grd

Question 11

Soil Characterization (soil triangle)

Answer 11

developed at the U of A

Known the %sand, %silt, %clay at least two, you can determine the type of soil

Question 12

Why have to collect VOC’s sample 60cms from furrow bottom?

Answer 12

due to the high mobility in soil water

Question 13

Soil Sampling Program (7)

Answer 13

1. Pollutant:
2. Depth to collect samples from
3. Sampling equipment
4. Sampling containers
5. # of sample
6. Identify analytical parameters
7. Identify preservation and sample storage