Boundary Island Multi III

Boundary Island is located in the Peel inlet, and is just a short ~600m paddle from the Erskine foreshore. There is only a jetty on the island and no facilities whatsoever. Please note due to bird nesting the island is currently closed after dark.

To obtain the final co ordinates, visit the listed co ordinates where there is a fence with a number of signs. They are all the same so any one of them will do for the calculations.

On the very bottom of the sign is some tiny text of 17 words.
(Count hyphenated words as 1 word)  

Using the letter values of the letters (a=1, b=2, etc) find the location of the cache at

S32 3A.BCD E115 4E.FGH

where

A = 8th word 1st letter 
B = 5th word 1st letter
C = 13th word 1st letter
D = 10th word 1st letter
E = 5th word 1st letter
F = 3rd word 1st letter
G = 4th word last letter
H = 12th word 2nd letter