Op Tech Environmental Services Inc: SC 13D/A filed Jul 30, 2013

Name: Op Tech Environmental Services Inc SC 13D/A (0001104659-13-057721)
Creator: Op Tech Environmental Services Inc
Published: 2013-07-30

Form type: SC 13D/A
Filing date: Jul 30, 2013
Accession number: 0001104659-13-057721
Filer: Op Tech Environmental Services Inc (CIK 858748)