- Accomodation and Food Services | Telephone: 1-800-541-8345 | E-mail
- Administrative and Support and Waste Management and Remediation Services | Telephone: 1-800-541-8345 | E-mail
- Arts, Entertainment, and Recreation | Telephone: 1-800-541-8345 | E-mail
- Construction | Telephone: 301-763-4673 | E-mail
- Educational Services | Telephone: 1-800-541-8345 | E-mail
- Finance and Insurance | Telephone: 1-800-541-8345 | E-mail
- Health Care and Social Assistance | Telephone: 1-800-541-8345 | E-mail
- Information | Telephone: 1-800-541-8345 | E-mail
- Management of Companies and Enterprises | Telephone: 1-800-541-8345 | E-mail
- Manufacturing | Telephone: 301-763-4673 | E-mail
- Mining | Telephone: 301-763-4673 | E-mail
- Other Services (Except Public Administration) | Telephone: 1-800-541-8345 | E-mail
- Professional, Scientific, and Technical Services | Telephone: 1-800-541-8345 | E-mail
- Real Estate and Rental and Leasing | Telephone: 1-800-541-8345 | E-mail
- Retail Trade | Telephone: 1-800-541-8345 | E-mail
- Transportation and Warehousing | Telephone: 1-800-541-8345 | E-mail
- Utilities | Telephone: 1-800-541-8345 | E-mail
- Wholesale Trade | Telephone: 1-800-541-8345 | E-mail
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