Darrell V. Oliver, Licensed

License details

"Based in" is the city and county of the address on the business's license record.

How to check this license

We publish the license details exactly as they appear in the public licensing records of the agency that issued the license; we do not vouch for the business itself. Before hiring, look up license #01190 directly with the agency that issued it, confirm it is still active, and ask for a current certificate of insurance.

Source: MD State Board of On-Site Wastewater Professionals - registered individuals, last checked 2026-08-17. Check current status at the state agency website.

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