The Earth & Material Sciences Group

Medall, Aragon Geotechnical, Inc., Associated Soils Engineering, Inc., Remediation Sciences, Inc., Engineers Inspection Services, Inc., Owens Geotechnical, Inc., and Geo-Environmental, Inc. constitute "The Earth and Material Sciences Group (TEMSG0." The combined expertise of our member firms allows us to offer a broad spectrum of engineering, geological, material testing, and environmental services to both the public and private sectors in California and Nevada. We have offices and laboratories in Riverside, Long Beach, Santa Ana, Newport Beach, Escondido, and San Diego. In Nevada, our office and laboratory locations include Reno and Las Vegas. About 80-90% of our work performed by Owens Geotechnical in Las Vegas are for casinos, including the Belagio, Treasure Island, Mirage, and many others.

Products and Services
Facility Design and Construction > Construction > Consulting > Geotechnical, Environmental, Construction Inspection, Soils and Materials Testing Services
Geotechnical, geology, hydrogeology, earthquake engineering, environmental assessment and remediation, pavement design and testing, concrete and steel testing, and deputy inspection services
Headquarters
16801 Van Buren Boulevard
Riverside, California 92504
 
Phone: (951) 776-0345
Fax: (951) 776-0395
Website: www.temsg.com
Email: mag@temsg.com
 
Upper Management:  Mr. Sheldon Medall, President
sembc@ix.netcom.com
Associated Soils Engineering, Inc.
2860 Walnut Avenue
Signal Hill, California 90755
 
Phone: (562) 426-7990
Fax: (562) 426-1842
Website: www.temsg.com
Email: njohnson@temsg.com
 
Upper Management:  Mr. Ted C. Riddell RG, CEG, Principal Geologist
ted@associatedsoils.com
Marketing:  Mrs. Nancy T. Johnson, Director of Marketing
njohnson@temsg.com
Engineers Inspection Services, Inc.
4500 Campus Drive, Suite 380
Newport Beach, California 92660
 
Phone: (949) 660-9292
Fax: (949) 660-9295
Website: www.temsg.com
Email: njohnson@temsg.com
 
Upper Management:  Mr. Sheldon Medall, Principal
sembc@ix.netcom.com
Marketing:  Mrs. Nancy T. Johnson, Director of Marketing
njohnson@temsg.com
Geo-Environmental, Inc.
1720 E. Garry Avenue, Suite 215
Santa Ana, California 92705
 
Phone: (949) 263-8334  ext. 30
Fax: (949) 263-8338
Website: www.geo-environmental.com
Email: njohnson@geo-environmental.com
 
Upper Management:  Dr. Farhat H. Siddiqi, Principal Engineer
fsiddiqi@geo-environmental.com
Marketing:  Mrs. Nancy T. Johnson, Director of Marketing
njohnson@geo-environmental.com
Geo-Environmental, Inc.
2430 Vineyard Avenue, Suite 202
Escondido, California 92026
 
Phone: (760) 749-9422  ext. 30
Fax: (760) 751-8683
Website: www.geo-environmental.com
Email: njohnson@geo-environmental.com
 
Upper Management:  Dr. Farhat H. Siddiqi, Principal Engineer
fsiddiqi@geo-environmental.com
Marketing:  Mrs. Nancy T Johnson, Director of Marketing
njohnson@geo-environmental.com
Medall, Aragon Geotechnical, Inc.
16801 Van Buren Boulevard
Riverside, California 92504
 
Phone: (951) 776-0345
Fax: (951) 776-0395
Website: www.temsg.com
Email: njohnson@temsg.com
 
Upper Management:  Mr. Fernando Aragon PE, GE, President, Geotechnical Engineer
aragon@temsg.com
Marketing:  Mrs. Nancy T. Johnson, Director of Marketing
njohnson@temsg.com
Owens Geotechnical, Inc.
4480 Hacienda Avenue, Suite 104
Las Vegas, Nevada 89118
 
Phone: (702) 893-3478
Fax: (702) 873-2199
Website: owensgeotech.com
Email: njohnson@temsg.com
 
Marketing:  Mrs. Nancy T. Johnson, Director of Marketing
njohnson@temsg.com
Remediation Sciences, Inc.
4500 Campus Drive, Suite 380
Newport Beach, California 92660
 
Phone: (949) 660-9292
Fax: (949) 660-9295
Website: www.temsg.com
Email: njohnson@temsg.com
 
Upper Management:  Mr. Yonathan Yoseph, Principal Engineer
yyoseph-rsi@sbcglobal.net
Marketing:  Mrs. Nancy T. Johnson, Director of Marketing
njohnson@temsg.com
Additional Information
Date Established: January, 1973
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