Appendix D
List of Symbols
A
Aora
A'
Ai
AL
AP
AA
amU
B
BAT
BHP
BOD
BOD5
BODlllt
Bq
b b C C C C
cd
Ci
CP
co
C,
CEQ
Ci
cso
CSTC
cfsCsoil loss, todacre-year
area, m2 or ft2
surface area of the sand bed, m2 or ft'
acreage of subarea i, acres
limiting area in a thickener, m2
surface area of the particles, m2 or ft2
attainment area
atomic mass unit
aquifer thickness, m or ft
best available technology
brake horsepower
biochemical oxygen demand, mgL
fiveday BOD
ultimate BOD: carbonaceous plus nitrogenous
Becquerel; one radioactive disintegration per second
slope of filtrate volume vs time curve
cyclone inlet width in m
concentration of pollutant in g/m3 or kg/m3
cover factor (dimensionless ratio)
Hazen-Williams friction coefficient
total percolation of rain into the soil, mm (Chap. 13)
drag coefficient
solids concentration at any level i
specific heat at constant pressure in Wkg-K
influent solids concentration, mgL
underflow solids concentration, mgL
Council on Environmental Quality
Curie; 3.7 x 10" Bq
combined sewer overflow
capillary suction time
Chezy coefficient
wave velocity, ds
cubic feet per second457