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Sample Type Codes

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# National Water Information System
# 2017/08/17
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# Date Retrieved: USGS Water Data for the Nation Help System
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samp_type_cd	samp_type_nm
1s	18s
1	Spike
2	Blank
3	Reference
4	Blind
5	Duplicate
6	Reference material
7	Replicate
8	Spike solution
9	Regular
A	Not determined
B	Other QA
H	Composite (time)
K	Spike Replicate