Contact

Address: 2860 Walnut Avenue • Signal Hill, CA 90755

Phone: 562-426-7990 • Fax: 562-426-1842

Email:

Edward C. (Ted) Riddell, P.G., C.E.G. / Principal & President ted@associatedsoils.com

Lawrence J.D. Chang, P.E., G.E. lchang@associatedsoils.com 

John R. Whitney, P.G., C.E.G. john@associatedsoils.com

Gary Martin, Project Engineer gary@associatedsoils.com 

Wendy Patterson, Dispatch/Office Manager wendy@associatedsoils.com

Donald Zike / Laboratory Manager don@associatedsoils.com

General Information, info@associatedsoils.com