A	mg/l
B	ug/l
C	mg/kg (ug/g)
D	ug/kg
E	#/100 ml (no./100 ml) (cells/100 ml)
F	#/ml (no./ml) (cells/ml)
G	#/liter (cell/liter)
H	degrees C
I	distance
J	degrees F
K	CFS
L	gpm, gpd, or mgd
M	pc/l
N	MPN
O	%, percent
P	no units, code, ratio, etc.
Q	time: day, mo, yr, sec, min, hr
R	mmHg
S	pH
T	pc/gm
U	no/sq ft
V	#/day (lb/day), lb/yr
W	#/effort
X	production:  ton, ton/day Kg/1000gal
Y	wt. measurement
Z	"catch all"
