X0101 EFFECT 33 LIVE 2011-06-24 15:00:00

S-4

0001178994 QUALITY DISTRIBUTION LLC 333-173556 0001075365 QC Energy Resources, Inc. 333-173556-11 0000922863 QUALITY DISTRIBUTION INC 333-173556-10 0001075361 AMERICAN TRANSINSURANCE GROUP INC 333-173556-09 0001432517 Boasso America CORP 333-173556-08 0000215425 CHEMICAL LEAMAN CORP /FL/ 333-173556-07 0001075370 MEXICO INVESTMENTS INC 333-173556-06 0001075363 POWER PURCHASING INC 333-173556-05 0001478115 QD Risk Services, Inc. 333-173556-04 0001075358 QUALA SYSTEMS INC 333-173556-03 0001075372 QUALITY CARRIERS INC 333-173556-02 0001271103 QD CAPITAL CORP 333-173556-01