The Source Group Inc. provides a variety of services to key industries.

Contact Us

To meet our clients' needs, The Source Group maintains offices across California, as well as in Phoenix, Arizona, Springfield, Missouri and Northville, Michigan; conducting work on projects throughout the U.S.

General Company Information

Email: info@thesourcegroup.net

Pleasant Hill (San Francisco Bay Area) Corporate Office

3451-C Vincent Road
Pleasant Hill, California 94523

Contact: Matt Sutton, Principal Engineer
Ph. (925) 944-2856; Fax (925) 944-2859

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Thousand Oaks Office (Los Angeles Area)

299 West Hillcrest Drive, Suite 220
Thousand Oaks, California 91360

Contact: Mark Labrenz, Principal Hydrogeologist
Ph. (805) 373-9063; Fax (805) 373-9073

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Long Beach Office (Los Angeles Area)

1962 Freeman Avenue
Signal Hill, California 90755

Contact: Neil Irish, Principal Geologist
Ph. (562) 597-1055; Fax (562) 597-1070

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Sacramento Office

4231 Pacific Street, Suite 1
Rocklin, California 95677

Ph. (916) 652-6666; Fax (916) 652-6667

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San Diego Office

5480 Baltimore Drive, Suite 209
La Mesa, California 91942

Contact:  Charlie Lawrence, Principal Hydrogeologist
Ph. (619) 713-1442; Fax (619) 713-1128

Missouri Office

1340 West Battlefield Road
Springfield, Missouri 65807-4102

Contact:  Neal Farrar, Principal Geologist
Ph. (417) 891-9971; Fax (417) 891-9751

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Michigan Office

17430 Maple Hill Drive
Northville, Michigan 48168

Contact: Robert Kalweit, Principal Engineer
Ph. (248) 924-5253; Fax (248) 344-1065

Agricultural Services Offices

9630 Bruceville Road #106
Elk Grove, California 95757
Contact:  Tom Prevost, Principal Engineer
Ph: (916) 803-1222

P.O. Box 1016
Denair, CA 95316
Contact:  Bridget Whitney Pomaville, Project Manager, CNMP
Ph: (480) 232-7374