Column Headings	Description
LS_Altitude	land surface altitude
Well_dep	well depth
Casing_ dep	casing depth
Well_use	well use
Casing_dia	casing diameter
Opening	type of opening
Yrs_sampled	years sampled
No_samples	number of samples

Other abbreviations:	
P	perforated
X	open hole
S	screened
W	withdrawal
O	observation
U	unused
T	test
qc	sample collected for quality control
- 	no data available