Must I sample beyond the borders of the property during the Phase II Assessment?

Sometimes sampling beyond the property boundary may be necessary if a discharge of hazardous substance from the property may have led to an environmental impact elsewhere. Typically, this would occur in instances where a gasoline station or a dry cleaning establishment is, or was previously, on the property. If the property had any other discharges as a part of previous uses, sampling beyond the property borders may be necessary. It should be noted that access to conduct a subsurface survey beyond the borders of the subject property needs to be granted before drilling activities can be conducted.