G = Inflation pressure at gauge (PSI)
DP = Depth to top of packer (feet)
DW = Depth to static water level in well (feet)
Sp = Unconfined packer pressure rating for the well size (PSI)
PP = Injection pump pressure (PSI)

1 To calculate Packer Inflation Pressure for a withdraw test (pump out):

G = [ (DP - DW) x .43 ] + Sp + [ (DP - DW) x .43 x .2 ]

NOTE: This total must not exceed confined packer pressure rating for the well size.

2 To calculate Packer Inflation Pressure for an injection test (pump in):

G = [ (DP x PSI per foot of Injected Fluid*) + Sp + PP ] x 1.1
*.43 for Water or .6 for grout

NOTE: This total must not exceed confined packer pressure rating plus (DP - DW) x .43