S = V x 8.34 [0.011 (BOD — 300) + 0.007 (S.S. —
300)]
|
Where:
| ||||
S
|
=
|
Surcharge in dollars.
| ||
V
|
=
|
Millions of gallons of water consumed during the billing period.
| ||
8.34
|
=
|
Pounds per gallon of water.
| ||
0.011
|
=
|
Unit charge per pound of BOD in dollars.
| ||
BOD
|
=
|
BOD strength index in parts per million by weight.
| ||
300
|
=
|
Normal BOD strength in parts per million by weight.
| ||
0.007
|
=
|
Unit charge per pound of suspended solids in dollars.
| ||
S.S.
|
=
|
Suspended solids strength index in parts per million by weight.
| ||
300
|
=
|
Normal suspended solids strength in parts per million by weight.
| ||
(There shall be no reduction in surcharge for a discharge with
less than 300 BOD or S.S.)
|
S (additional) = V x 8.34 [1.5 (P — 10)]
|
Where:
| ||||
1.5
|
=
|
Unit charge per pound of P in dollars.
| ||
P
|
=
|
Phosphorous as P in parts per million by weight.
| ||
10
|
=
|
Normal P strength in parts per million by weight.
|