The Wisconsin Public Service Commission has decided to fine the sub-contractor blamed for last summer’s fatal explosion in Sun Prairie the maximum amount.  V-C Tech is accused of failing to call the Digger’s Hotline before starting its work in the downtown area.  A V-C Tech worker hit a gas main, causing the blast which killed firefighter Cory Barr and destroyed several buildings.  The sub-contractor will have to pay a 25-thousand dollars penalty, plus a 10-percent surcharge on the fine.