Certified Tank Removal Contractors (PDF) 
List of contractors in the Baltimore Metro area who are certified by the Maryland Department of the Environment.

Certified Water Testing Laboratories (PDF)
List of water testing laboratories in the Baltimore Metro area.

Excavators and Licensed Septic System Installers (PDF) 
List of excavators and septic systems installers in the Baltimore Metro area.

Licensed Well Drillers and Pump Installers (PDF) 
List of well drillers and pump installers in the Baltimore Metro area.

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Revised August 23, 2007