Legal Samples

Question 1

chain of custody

Answer 1

chronology document of the events and people that were involved with the sample collected

Question 2

sample containers must be sealed securely first with a tight-fitting lid then either a sample seal or sealed with a tape.

Answer 2

to avoid tampering with the sample containers

Question 3

required information for sample containers(6)

Answer 3

Name of the sampler 
site id
sample id 
date and time of sample collection 
sample conditions (temp, turbidity, color, EC...)
written signature of the collector

Question 4

who sign custody

Answer 4

• keeps track on sample collection, through analysis, and reporting to final disposal

Question 5

Defensible (cho the bao chua)

Answer 5

ability to withstand(chong lai) reasonable challenge related to the veracity (tih chan thuc) (conformity to facts, accuracy) integrity or quality of the decision making process

Question 6

Field notebook

Answer 6

• new & contain only sampling information particular to the case
• attributable - signed documents
• permanents - indelible ink
• secure - hardbound

Question 7

Relinquished by

Answer 7

means who pass on the sample

Question 8

samples (7)

Answer 8

• pre-labelled with where, when, who, why
• certified clean - by a third party supplier
• rinsed 2x acetone, then 2x hexane
• apply a legal seal to sample container as soon as sample is collected
• Store at 4C with blue ice
• In a cooler that is lockable and locked
• chain of custody attached to the outside (sometimes, 2nd inside

Question 9

Storage pod sample and documentation

Answer 9

3 months for regular samples
10 yrs for legal sample
10 yrs - documentation