What is the mailing address for the environmental protection agency? Mailing Addresses and Phone Numbers HQ Standard Postal Mailing Address. Washington, DC 20460 To send a letter to a particular EPA organization, add the name... HQ Overnight Delivery Addresses. Fort Meade, MD 20755-5350 Regional Offices Across the Nation. Boston, MA 02109-3912 Phone: (617) 918-1111 ...Where is international environmental corporation located in oklahoma city? International Environmental Corporation 5000 W. I-40 Service Road Oklahoma City, OK 73128 405-605-5000 CareersExternal link, opens in new window. What is the environment of international management? The International Environment Managing a business in a foreign country requires managers to deal with a large variety of cultural and environmental differences. As a result, international managers must continually monitor the political, legal, sociocultural, economic, and technological environments. How do i find the address for the epa office? Address. Phone Number. US EPA Office of Research and Development (ORD) - main office. 1200 Pennsylvania Avenue, NW. Mail Code: 8101R. Washington, DC 20460.