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Disclosure: Please note that this list has been provided for your convenience. Alameda County Environmental Health
Department (ACEHD) is not affiliated with this list. ACEHD does not certify, endorse or recommend any
Consultant/Contractor or their services. This list may not include other Consultants or Contractors that may be available in
the industry. This list may also change without notice.
Onsite Wastewater System (OWS) Consultants (Designers)
Company Name Website Professional Phone
Salvador Ruiz Salvador Ruiz, REHS (925) 212-9168
Questa Engineering www.questaec.com Norm Hantzsche, PE (510) 236-6114
Northstar Engineering nweigel@northstareng.com Nick Weigel, PE (530) 893-1600
NexGen Engineering & Consulting LLC www.NexGenEng.com Ian Cole, PE (866) 269-0999
Myer Engineering, Inc. www.myerengineering.com Paul Myer, MS, PE (831) 800-2244
Hogan Land Services www.hoganls.com/services/septic Daniel Byrne, PE (877) 544-2104
Environmental Health Consulting Christopher Day, REHS (650) 293-1045
Campi Engineering Jim Campi, PE, REHS (707) 864-5618
Biosphere Consulting www.biosphere-consulting.com Andrew Brownstone, PE (831) 430-9116
Applied Wastewater Solutions, Inc. www.sjbconsulting.net Steve Buckley, REHS (925) 997-7470
Acorn Onsite, Inc. www.acornonsite.com Tim Johnston, PE (925) 447-5200
OWS Consultant (Designer) Definition: A “Consultant (Designer)” is an individual licensed, registered, or certified by
a California State Agency to conduct site evaluations and prepare Onsite Wastewater System designs. This includes an
individual who is licensed as a California professional civil engineer, a professional geologist or a registered
environmental health specialist. Please note that apart from this list, anyone holding the licenses described above
has the ability to design an Onsite Wastewater System in the State of California.
Onsite Wastewater System (OWS) Contractors (Installers)
Company Name Website Professional Phone
Williams Sanitary www.williamssanitaryservice.com Alberto Solorio (925) 634-4855
Pacific Coast Well & Pump, Inc www.pacificcoastwell.com Charles Moore (510) 581-6000
DRM Construction www. drmconst.com Devin Mc Gee (209) 324-0272
Acorn Onsite, Inc. www.acornonsite.com Tim Johnston (925) 447-5200
A-1 Septic Tank Service www.a1tank.net James Shane (510) 886-4455
A-1 Construction www.a1constructionge.com Bob Piddock (510)728-9231
OWS Contractor (Installer) Definition: A “Contractor (Installer)” is an individual licensed as a general engineering
contractor, a general building contractor, a plumbing contractor or a sanitation system contractor with the California
State Licensing Board. These licenses are listed as Class A, B, C-36 and C-42. Please note that apart from this list,
anyone holding the licenses described above has the ability to install/construct an Onsite Wastewater System in
the State of California.