Hi Patricia,
The DR embassy is located in Sun Valley.
Here's their info.
9001 Laurel Canyon Blv. Suite 204
Sun Valley, CA 91352
Phone: (510) 864-7777
Fax: (818) 504-6617
I had to actually go there about 2 years ago to get some documents translated / stamped etc. so the place really does exist.
Here's a URL if it helps -
Embassy of the Dominican Republic, in the United States
Thanks!