BCI Engineers and Scientists

BCI completed a Category "S" (same hazardous substance use) Baseline Environmental Assessment (BEA) and a Compliance Analysis for 21340 Pitko Road, Clinton Township, Michigan. The purpose of this Category S BEA was to provide an independent, professional evaluation and opinion regarding existing environmental conditions associated with the subject property and also to maintain a liability exemption for the cleanup of existing contamination due to past operations at the subject property.

Based on a subsurface investigation at the subject property which determined that soil and groundwater contamination exists in concentrations above the Michigan Department of Natural Resources and Environment residential cleanup criteria, the subject property qualifies as a facility as defined in Part 201 of the Natural Resources and Environmental Protection Act, 1994 PA 451, as amended, and the rules promulgated thereunder.

Except for the use of the diesel fuel aboveground storage tank for the emergency backup generator, the intended use of the subject property does not involve storage, handling or management of hazardous substances. The owner will distinguish a spill near the generator in the future using the existing conditions established by sampling the soil on the subject property.

A plan for response activities is intended to protect the building and occupants in compliance with Section 20107a of Part 201. The response actions should incorporate overlapping levels of protection that prevent releasing fuel to the soil near the generator, exposure to non-native soil material, using groundwater as a drinking water source and methane accumulation in the building.

The owner will:

• Avoid fuel spills to the surface soils
• Maintain site security fencing to prevent potential exposure to non-native material buried on-site
• Maintain vegetative cover to prevent exposure to non-native material buried on-site
• Implement spill counter measures if a spill near the generator does occur
• Engineer adequate ventilation to prevent accumulation of methane, if the building is occupied in the future
• Install interior methane gas alarms & a notification system
• Complete routine inspection of methane gas alarms
• Vent soil under the parking lot if the asphalt parking lot is expanded to cover more than 10,000-square feet
• Construction seal the building floor, if the building is to become occupied

To address the potential for methane to become present at the existing structure, any cracks in the foundation will be sealed and a gas monitoring and alarm system has been installed.