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Tri-TAC Chair Tri-TAC Vice Chair
Jim Colston
Orange County Sanitation District
P.O. Box 8127
Fountain Valley, CA 92728

(714) 593-7458
jcolston@ocsd.com

Ben Horenstein
East Bay Municipal Utility District
375 11th St. MS 702
Oakland, CA 94607
(510) 287-1846
bhorenst@ebmud.com


Land Committee Co-Chairs
Matt Bao
Los Angeles County Sanitation Districts
1955 Workman Mill Road
Whittier, CA 90601
(562) 699-7411 ext. 2809
mbao@lacsd.org
Natalie Sierra
San Francisco Public Utilities Commission
1145 Market Street, 5th Floor
San Francisco, CA 94103
(415) 934-5772
nsierra@sfwater.org

Water Committee Co-Chairs
Valerie Housel
City of San Bernardino Water Department
399 Chandler Place 
San Bernardino, CA 92408

(909) 384-5117
housel_va@ci.san-bernardino.ca.us

Arleen Navarret
San Francisco Public Utilities Commission
1145 Market Street, 5th Floor
San Francisco, CA 94103
(415) 934-5731
anavarret@sfwater.org


Air Committee Co-Chairs
Stephnie Cheng
CH2M Hill
155 Grand Avenue, Suite 1000
Oakland, CA 94612
(510) 251-2888
stephanie.cheng@ch2m.com
Jay Witherspoon
CH2M Hill
155 Grand Avenue, Suite 1000
Oakland, CA 94612
(510) 251-2888
jay.witherspoon@ch2m.com
CalFOG Workgroup Chair  
Trish Maguire
East Bay Municipal Utility District
375 11th Street, MS 702
Oakland, CA 94623
(510) 287-1717
pmaguire@ebmud.com
 

 

 

 

 
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