Privacy Policy

This privacy statement was last changed on , September 17, 2024 , and applies to citizens and legal permanent residents of the United States.

In this privacy statement, we explain what we do with the data we obtain about you via https://hydrofocus.com. We recommend you carefully read this statement. In our processing we comply with the requirements of privacy legislation. That means, among other things, that:

  • we clearly state the purposes for which we process personal data. We do this by means of this privacy statement;
  • we aim to limit our collection of personal data to only the personal data required for legitimate purposes;
  • we first request your explicit consent to process your personal data in cases requiring your consent;
  • we take appropriate security measures to protect your personal data and also require this from parties that process personal data on our behalf;
  • we respect your right to access your personal data or have it corrected or deleted, at your request.

If you have any questions, or want to know exactly what data we keep of you, please contact us.

 

1. Purpose and categories of data

We may collect or receive personal information for a number of purposes connected with our business operations which may include the following:

1.1 Contact - Through phone, mail, email and/or webforms

The following categories of data are collected

    • A first and last name
    • An email address
    • IP Address
    • Internet activity information, including, but not limited to, browsing history, search history, and information regarding a consumer's interaction with an Internet Web site, application, or advertisement

Retention period - We retain this data until the service is terminated.

1.2 Newsletters

The following categories of data are collected

    • A first and last name
    • An email address
    • IP Address
    • Internet activity information, including, but not limited to, browsing history, search history, and information regarding a consumer's interaction with an Internet Web site, application, or advertisement

Retention period - We retain this data until the service is terminated.

1.3 Compiling and analyzing statistics for website improvement.

The following categories of data are collected

    • A first and last name
    • An email address
    • IP Address
    • Internet activity information, including, but not limited to, browsing history, search history, and information regarding a consumer's interaction with an Internet Web site, application, or advertisement

Retention period - We retain this data until the service is terminated.

2. Disclosure practices

We disclose personal information if we are required by law or by a court order, in response to a law enforcement agency, to the extent permitted under other provisions of law, to provide information, or for an investigation on a matter related to public safety.

If our website or organisation is taken over, sold, or involved in a merger or acquisition, your details may be disclosed to our advisers and any prospective purchasers and will be passed on to the new owners.

3. How we respond to Do Not Track signals & Global Privacy Control

Our website does not respond to and does not support the Do Not Track (DNT) header request field.

4. Cookies

Our website uses cookies. For more information about cookies, please refer to our Cookie Policy on our Opt-out preferences webpage. 

5. Security

We are committed to the security of personal data. We take appropriate security measures to limit abuse of and unauthorized access to personal data. This ensures that only the necessary persons have access to your data, that access to the data is protected, and that our security measures are regularly reviewed.

6. Third-party websites

This privacy statement does not apply to third-party websites connected by links on our website. We cannot guarantee that these third parties handle your personal data in a reliable or secure manner. We recommend you read the privacy statements of these websites prior to making use of these websites.

7. Amendments to this privacy statement

We reserve the right to make amendments to this privacy statement. It is recommended that you consult this privacy statement regularly in order to be aware of any changes. In addition, we will actively inform you wherever possible.

8. Accessing and modifying your data

If you have any questions or want to know which personal data we have about you, please contact us. Please make sure to always clearly state who you are, so that we can be certain that we do not modify or delete any data of the wrong person. We shall provide the requested information only upon receipt of a verifiable consumer request. You can contact us by using the information below. You have the following rights:

8.1 You have the following rights with respect to your personal data

    1. You may submit a request for access to the data we process about you.
    2. You may object to the processing.
    3. You may request an overview, in a commonly used format, of the data we process about you.
    4. You may request correction or deletion of the data if it is incorrect or not or no longer relevant, or to ask to restrict the processing of the data.

8.2 Supplements

This section, which supplements the rest of this Privacy Statement, applies to citizens and legal permanent residents of California (CPRA)

California

Right to know what personal information is being collected about you

A consumer shall have the right to request that a business that collects personal information about the consumer disclose to the consumer the following:

      1. The categories of personal information it has collected about that consumer.
      2. The categories of sources from which the personal information is collected.
      3. The business or commercial purpose for collecting or selling personal information.
      4. The categories of third parties with whom the business shares personal information.
      5. The specific pieces of personal information it has collected about that consumer.

The right to know whether personal information is sold or disclosed and to whom

A consumer shall have the right to request that a business that sells the consumer’s personal information, or that discloses it for a business purpose, disclose to that consumer:

      1. The categories of personal information that the business collected about the consumer.
      2. The categories of personal information that the business sold about the consumer and the categories of third parties to whom the personal information was sold, by category or categories of personal information for each third party to whom the personal information was sold.
      3. The categories of personal information that the business disclosed about the consumer for a business purpose.

The Right to equal service and price, even if you exercise your privacy rights

A consumer shall have the right to request that a business delete any personal information about the consumer which the business has collected from the consumer.

A business that receives a verifiable request from a consumer to delete the consumer’s personal information pursuant to subdivision (a) of this section shall delete the consumer’s personal information from its records and direct any service providers to delete the consumer’s personal information from their records.

A business or a service provider shall not be required to comply with a consumer’s request to delete the consumer’s personal information if it is necessary for the business or service provider to maintain the consumer’s personal information in order to:

      1. Complete the transaction for which the personal information was collected, provide a good or service requested by the consumer, or reasonably anticipated within the context of a business’s ongoing business relationship with the consumer, or otherwise perform a contract between the business and the consumer.
      2. Detect security incidents, protect against malicious, deceptive, fraudulent, or illegal activity; or prosecute those responsible for that activity.
      3. Debug to identify and repair errors that impair existing intended functionality.
      4. Exercise free speech, ensure the right of another consumer to exercise his or her right of free speech, or exercise another right provided for by law.
      5. Comply with the California Electronic Communications Privacy Act pursuant to Chapter 3.6 (commencing with Section 1546) of Title 12 of Part 2 of the Penal Code.
      6. Engage in public or peer-reviewed scientific, historical, or statistical research in the public interest that adheres to all other applicable ethics and privacy laws, when the businesses’ deletion of the information is likely to render impossible or seriously impair the achievement of such research, if the consumer has provided informed consent.
      7. Exercise free speech, ensure the right of another consumer to exercise his or her right of free speech, or exercise another right provided for by law.
      8. To enable solely internal uses that are reasonably aligned with the expectations of the consumer based on the consumer’s relationship with the business.
      9. Comply with a legal obligation.
      10. Otherwise use the consumer’s personal information, internally, in a lawful manner that is compatible with the context in which the consumer provided the information.

Right to opt-out

You may submit a request directing us not to make certain disclosures of personal information we maintain about you. For more information about the possibility of submitting an opt-out request, please refer to our Opt-out preferences page.

Financial incentives

Selling of personal data to third parties

We have not sold consumers’ personal data in the preceding 12 months

We have not disclosed consumers’ personal information for a business purpose in the preceding 12 months.

      • Internet activity information, including, but not limited to, browsing history, search history, and information regarding a consumer's interaction with an Internet Web site, application, or advertisement
      • A first and last name
      • An email address
      • IP Address

9. Children

Our website is not designed to attract children and it is not our intent to collect personal data from children under the age of consent in their country of residence. We therefore request that children under the age of consent do not submit any personal data to us.

10. Contact details

HydroFocus Inc.
2827 Spafford Street
Davis, CA 95618
United States
Website: https://hydrofocus.com
Email:

Phone number: (530) 759-2484

Contact Us

Have any questions regarding our process? Get in touch now. 

Marc Olds - Resumé

Qualifications

Marc joined HydroFocus in May of 2019. Before that, he worked with the USGS California Water Science Center. On the HydroFocus team, Marc primarily assists with the development of hydrologic models, water quality analysis, and subsidence evaluation. His specialties include GIS, data management, and programming solutions.

Marc holds a Bachelors of Science in Hydrology from the University of California, Davis. Marc is currently working towards a Masters of Science in Soil Science at UC Davis focusing on the development of advanced tools for soil classification.

Professional Experience

2019 to present

Assistant Hydrologist, HydroFocus, Inc. Davis, California.

Nick Christen - Resumé

Qualifications

Nick Christen’s background is in meteorology and climate science. He holds a Bachelor of Science degree in Earth Science from San Francisco State University. His undergraduate research there included statistical analysis of high-resolution precipitation model forecasts and simulations. In 2018, he joined the HydroFocus team where his focus includes biometeorology and quantification of greenhouse gas (GHG) fluxes and net ecosystem carbon balance of systems. He has over six years of experience collecting, processing and analyzing field data and procuring high quality datasets. Other areas of his work include developing maps in ArcGIS Software, digital imagery analysis, groundwater and land surface elevation measurements, and water quality data collection.

Professional Experience

2024 to Present

Ecosystem Scientist, HydroFocus, Inc. —Davis, CA

  • Deploy and maintain eddy-covariance towers for micrometeorological monitoring
  • Quantify net ecosystem carbon balance related to land use studies in the Sacramento-San Joaquin Delta and Northern California
  • Collect, process, and analyze field data
  • Utilize Geographical Information Systems to create maps for project field sites and well monitoring reports
  • Design, build, and test custom gas chambers for gas measurements in various ecosystems

 

2021 to 2024

Associate Ecosystem Scientist, HydroFocus, Inc. —Davis, CA

2018 to 2021

Hydrolocal Technician, HydroFocus, Inc. —Davis, CA

2017-2018

Data Analyst, StormGeo Shipping — Sunnyvale, CA

  • Data processing, customer service, and software support for ship routing weather display software on board vessels and in client offices

Academic Background

  • Bachelor of Science, 2016, Earth Science, San Francisco State University.

Thesis title: Statistically evaluating high-resolution model precipitation forecasts and simulations in the San Francisco Bay Area

 

Steven Deverel - Resumé

Qualifications

Steven Deverel has over 30 years of hydrologic problem-solving experience in the western United States.  Dr. Deverel analyzes groundwater systems, quantifies chemical and physical processes in soils and groundwater, and evaluates groundwater- and surface-water quality.  He is a registered Professional Hydrologist certified by the American Institute of Hydrology, a California licensed Professional Geologist and a Texas licensed Professional Geoscientist.

Dr. Deverel:

  • Conducts surface and groundwater quality assessments.
  • Develops models to evaluate water movement and solute transport.
  • Quantifies chemical and physical processes in the saturated and unsaturated subsurface.
  • Applies statistical techniques to analyze land and water resources.
  • Determines water sources using geochemical and age-dating techniques
  • Evaluates subsidence and subsidence mitigation

Professional Experience

February 1996 to present

Consulting Hydrologist in Private Practice and Principal Hydrologist and co-founder, HydroFocus, Inc. since January 1998—Davis, CA

Recent example experience includes the following.

  • Hydrologic analysis and modeling of proposed development. 
  • Groundwater hydrologic and quality analysis related to agriculture.
  • Expert witness for groundwater contamination litigation which includes extensive data collection and groundwater flow and solute transport modeling.   
  • Provided expert testimony in Delta island flooding litigation on subsidence-related causes of levee failure.
  • Geochemical analysis and groundwater and heat flow modeling of stream aquifer interactions in agricultural watersheds in northern California. 
  • Evaluation of subsurface flow and seepage.  Used water isotopes and modeling to determine effects, rates and nature of leakage.
  • Evaluation of groundwater supply, flow and quality in relation to land and water management practices in various locations in California.
  • Evaluation of processes affecting water quality—Sacramento-San Joaquin Delta.  Field data collection and modeling to estimate organic carbon, mercury and salt load for different wetland and agricultural water management practices.
  • Measurement and modeling of subsidence in the Sacramento-San Joaquin Delta.
  • Consulting hydrologist for agricultural coalitions in the Central Valley, California.
  • Evaluation of subsidence mitigation strategies—Sacramento-San Joaquin Delta, California.  Field data collection and modeling to evaluate water quality effects (including mercury) of different wetland management strategies for stopping and reversing the effects of subsidence.

1994 to 1996

Senior Hydrologist, Hydrologic Consultants, Inc.—Davis, CA

Consulting assignments included the following:

  • Evaluated sea water intrusion, nitrate contamination and flow of groundwater and nitrate movement in unsaturated zone—Salinas Valley, California.   
  • Analyzed water supply and quality issues—Santa Ynez Valley, California.
  • Developed water resources element of city General Plan—City of Lompoc.
  • Advised California Department of Water Resources on issues relating to subsidence in organic soils—Sacramento-San Joaquin Delta.
  • Quantified geochemical processes and groundwater flow for gold mining operations—northern Nevada.

1991 to 1994

Supervisory Hydrologist, U.S. Geological Survey—Sacramento, CA

Assistant District Chief: Guided hydrologic research, investigations and data collection programs throughout California:

  • Supervised and planned research of land- and water-management effects on subsidence and carbon fluxes—Sacramento-San Joaquin Delta.
  • Facilitated interactions among diverse projects and personnel.
  • Developed and maintained projects investigating processes affecting land and water resources.
  • Communicated research results to the resource management community and other audiences using published reports and oral presentations.
  • Established long range research and data collection activities.
  • Responsible for over 100 employees and an annual budget of over $11 million.

1984 to 1991

Research Geochemist, U.S. Geological Survey—Sacramento, CA

Project leader: Directed studies of processes affecting constituent mobility and transport.  Evaluated transport processes in aqueous and gaseous phases.  Conducted regional, subregional and local scale studies.  Guided an interdisciplinary team that integrated multi-scaled data:

  • Defined water and solute movement to agricultural drainage systems.
  • Identified processes affecting trace element mobility in soil and water.
  • Evaluated and implement statistical methods.
  • Directed hydrologic study of water quality, carbon fluxes and subsidence in organic soils—Sacramento-San Joaquin Delta:
    • Identified processes affecting subsidence.
    • Related carbon fluxes from organic soils to subsidence and global carbon balance.
    • Developed water and land management strategies for reducing subsidence.
    • Determined water management effects on drainage water quality.

Academic Background

  • Ph.D., June 1983, Soil and Water Science, Department of Land, Air, and Water Resources, University of California at Davis
  • Bachelor of Science, December 1979, Agricultural Science and Management, University of California at Davis
  • Instructor, “Ground-water Solute Transport Concepts”, USGS Denver Training Center, 1988-1993
  • Lecturer, Department of Land, Air, and Water Resources and Associate in the Experiment Station, University of California at Davis, 1988-1992
  • Post-graduate dissertation, thesis and oral examination committee member for University of California, Davis Hydrologic Sciences graduate students, 2001-present

Professional Affilications

  • American Geophysical Union
  • American Institute of Hydrology - registered Professional Hydrologist
  • California Groundwater Resources Association
  • International Association of Hydrogeologists

Relevant Publications

Vadose-Zone Hydrology, Biogeochemistry and Subsidence

Deverel, Steven J.; Bachand, Sandra; Brandenberg, Scott J.; Jones, Cathleen E.; Stewart, Jonathan P.; & Zimmaro, Paolo. 2016. Factors and Processes Affecting Levee System Vulnerability. San Francisco Estuary and Watershed Science, 14(4). jmie_sfewss_33460. Retrieved from: http://escholarship.org/uc/item/36t9s0mp

Deverel, Steven J., Ingrum, T., Lucero, Cl, and Drexler, J.Z., 2014, Impounded Marshes on Subsided Islands: Simulated Vertical Accretion, Processes, and Effects, Sacramento-San Joaquin Delta, CA USA. San Francisco Estuary and Watershed Science 12(2). jmie_sfews_12893. http://escholarship.org/uc/item/0qm0w92c.

Jaclyn A. Hatala, Matteo Detto, Oliver Sonnentag, Steven J. Deverel, Joseph Verfaillie, Dennis D. Baldocchi, 2012, Greenhouse gas (CO2, CH4, H2O) fluxes from drained and flooded agricultural peatlands in the Sacramento-San Joaquin Delta, Agriculture, Ecosystems and Environment , 150,1-18.

Cathleen Jones, Gerald Bawden, Steven Deverel, Joel Dudas, Scott Hensley, 2011, Characterizing land surface changes and levee stability in the Sacramento-San Joaquin Delta using UAVSAR  radar imagery, IGARSS2011 Proceedings

Deverel, S.J. and Leighton, D.A., 2010, Historic, recent and future subsidence, Sacramento-San Joaquin Delta, California, USA, San Francisco Estuary and Watershed Science, 8(2)  http://www.escholarship.org/uc/item/7xd4x0xw

Drexler, Judith Z., de Fontaine, Christian S., Deverel, S.J., 2009, The legacy of wetland drainage on the peat resource in the Sacramento-San Joaquin Delta, California, USA, Wetlands, 29, 372–386

Deverel, S.J., Thomas, J., Decker, D., Earman, S. and Mihevc, T, 2005, Groundwater evaporation estimates using stable isotope and chloride data, Yelland Playa, Spring Valley, Nevada, Desert Research Institute Division of Hydrologic Sciences, DHS publication 41219

D.A. Cohen, S.J. Deverel, L.A. Johnson, 1998, Feasibility Study of Differential SAR Interferometry for Subsidence Monitoring  in the Sacramento-San Joaquin Delta, IGARSS'98 Proceedings , pp1629-1631

Deverel, S.J., Wang, Bronwen and Rojstaczer, S.A., 1998, Subsidence in the Sacramento-San Joaquin Delta, in (Borchers, J.W., ed.) Proceedings of the Joseph Poland Subsidence Symposium, Association of Engineering Geologists, Special Publication No. 8, Star Publishing, Belmont, California, pp. 489-502.

Deverel, S.J., Rojstazcer, S.A. 1996, Subsidence of agricultural lands in the Sacramento-San Joaquin Delta, California:  Role of aqueous and gaseous carbon fluxes, Water Resources Research, 32, 2359-2367.

Rojstazcer, S.A. and Deverel, S.J., 1995, Land subsidence in drained histosols and highly organic mineral soils of California, Soil Science Society of America Journal, 59:1162-1167.

Rojstaczer, S.A. and Deverel, S.J., 1993, Time dependence in atmospheric carbon inputs from drainage of organic soils, Geophysical Research Letters, 20, 1383-1386.

Fio, J.L., Fujii, R. and Deverel, S.J., 1991, Evaluation of selenium mobility in soil using sorption experiments and a numerical model, western San Joaquin Valley, California, Soil Science Society of America Journal, 55, 1313-1320.

Rojstaczer, S.A., Hamon, R.E., Deverel, S.J. and Massey, C.A., 1991, Evaluation of selected data to assess the causes of subsidence in the Sacramento-San Joaquin Delta, California, U.S. Geological Survey Open File Report 91 -193.

Fujii, Roger, Deverel, S.J. and D.B. Hatfield, 1988, Distribution of selenium in soils of agricultural fields, Western San Joaquin Valley, California, Soil Science Society America Journal, 52, 1274-1283.

Deverel, S.J., L.D. Whittig and K.K. Tanji, 1986, Sulfate reduction and calcium carbonate equilibria in a Central California histosol, Soil Science Society of America Journal, 50, 1189-1193.

Tanji, K.K., and Deverel, S.J., 1984, Simulation modeling for reclamation of sodic soils, in  Soil salinity under irrigation-processes and management, Shainberg, I., and Shalhevet, J., eds., Springer-Verlag, Berlin

Groundwater Geochemistry and Quality

Deverel, S.J., Goldberg, S. and R.  Fujii, 2012, Chemistry of trace elements in soils and groundwater In Tanji et al (eds) Agricultural Salinity Assessment and Management Manual, American Society of Civil Engineers. Manual 71, 2nd edition.

Deverel, S.J., Leighton, David A. and Finlay, Mark R., 2007. Processes Affecting Agricultural Drainwater Quality and Organic Carbon Loads in California's Sacramento-San Joaquin Delta. San Francisco Estuary and Watershed Science. Vol. 5, Issue 2 (May), Article 2. http://repositories.cdlib.org/jmie/sfews/vol5/iss2/art2

Deverel, S.J., Fio, J.L., Dubrovsky, N.M., 1994, Distribution and mobility of selenium in groundwater in the western San Joaquin Valley of California in Selenium in the Environment, Benson, S. and Frankenburger, W. (eds).  Marcel Decker, New York.

Dubrovsky, N.M., Deverel, S.J. and Gilliom, R.J., 1993, Multiscale approach to regional groundwater quality assessment: selenium in the San Joaquin Valley, California in Regional Ground-water Quality (Alley, W.M, editor), Van Nostrand Reinhold, New York.

Deverel, S.J. and Fio, J.L., 1991, Groundwater flow and solute movement to drain laterals, western San Joaquin Valley, California. I. Geochemical assessment, Water Resources Research, 27, 2233 - 2246.

Deverel, S.J. and R.  Fujii, 1990, Chemistry of trace elements in soils and groundwater In Tanji et al (eds) Agricultural Salinity Assessment and Management Manual, American Society of Civil Engineers.

McNeal, J.M., Feder, G.L., Wilbur, W.G. and Deverel, S.J., 1990,  Environmental concerns related to selenium in the Western United States in   Proceedings of a U.S. Geological Survey Workshop on Environmental Geochemistry (Doe, B.R., ed.) U.S. Geological Survey Circular 1033.

Deverel, S.J. and S.P. Millard, 1988, Distribution and mobility of selenium and other trace elements in shallow ground water of the western San Joaquin Valley, California, Environmental Science and Technology, 22, 697-702.

Deverel, S.J. and Roger Fujii, 1988, Processes affecting the distribution of selenium in shallow groundwater of agricultural areas, Western San Joaquin Valley, California, Water Resources Research, 24, 516-524.

Fujii, Roger and S.J. Deverel, 1988, Mobility and distribution of selenium and salinity In groundwater and soil of drained agricultural fields, western San Joaquin Valley, California: In Jacobs, L.W. and others (ed.), Selenium in Agriculture and the Environment: American Society of Agronomy, Madison, Wisconsin, Special Publication no. 23, pp. 195-212.

Deverel, S.J., Gilliom, R.J., Fujii, Roger, Izbicki, J.A., and Fields, J.C., 1984, Distribution of selenium and other inorganic constituents in shallow ground water of the San Luis Drain Service Area, San Joaquin Valley, California: A preliminary study, U.S.  Geological Survey Water Resources Investigation Report 84-4319.

Deverel, S.J., 1985, Selenium in the San Joaquin Valley of California In 1984 National Water Summary, U.S.G.S. Water Supply Paper 2275.

Statistics

Deverel, S.J., 1989, Geostatistical and principal-component analysis of ground-water chemistry and soil-salinity data, San Joaquin Valley, California, In   Ragone, S. (ed.) Regional characterization of water quality, International Association of Hydrologic Sciences Publication no. 182  pp. 11-18.

Millard, S.P. and S.J. Deverel, 1988, Non-parametric statistical methods for comparing two sites based on data with multiple non-detect limits, Water Resources Research, 24, 2087-2098.

Ground Water Hydrology

Deverel, S.J. and Gallanthine, S.K., 1989, Distribution of salinity and selenium in relation to hydrologic and geochemical processes, San Joaquin Valley, California, Journal of Hydrology 109, 125-149.

Deverel, S.J., 1988, Geohydrologic aspects of water-quality problems of the San Joaquin Valley, California, Proceedings on Planning Now for Irrigation and Drainage, Irrigation and Drainage Division, American Society of Civil Engineers, Lincoln, Nebraska, July, 1988 pp. 694-699 (invited paper).

Fio, J.L. and Deverel, S.J., 1991, Groundwater flow and solute movement to drain laterals, western San Joaquin Valley, California, II. Quantitative hydrologic assessment, Water Resources Research, 27, 2247 - 2257.

Fio, J.L. and Deverel, S.J., 1990, Interaction of shallow ground water and subsurface drains: Implications for selenium transport and distribution in the western San Joaquin Valley, Groundwater, 28,788-789.

Sustainability

Deverel, Steven J.; Bachand, Sandra; Brandenberg, Scott J.; Jones, Cathleen E.; Stewart, Jonathan P.; & Zimmaro, Paolo, 2016. Factors and Processes Affecting Delta Levee System Vulnerability. San Francisco Estuary and Watershed Science, 14(4). jmie_sfews_33460. Retrieved from: http://escholarship.org/uc/item/36t9s0mp

Deverel, Steven J.; Lucero, Christina E.; & Bachand, Sandra. 2015. Evolution of Arability and Land Use, Sacramento–San Joaquin Delta, California. San Francisco Estuary and Watershed Science, 13(2). jmie_sfews_27914. Retrieved from: http://escholarship.org/uc/item/5nv2698k

Deverel, S.J., 2012, Impacts of irrigation in California, USA and relevance for the Brazilian semi-arid region (in Portuguese), ITEM, Irrigação e Tecnologia Moderna, Publication of the Brazilian Association of Irrigation and Drainage

 

Skip to content