HomeServicesCase StudiesAbout UsContact Zw3

Contact Us
About Zw3 INC.
​Zw3 Inc. (formerly Zaragoza Company Inc), established in 2002, is a Veteran-Owned Small Business and a Minority Business Enterprise comprised of experts and senior-level engineers and scientists retired from some of the leading environmental, water, wastewater, and process engineering firms, such as Black & Veatch, and Parsons Corporation. 
Interested in learning more?
Mr. Zaragoza has more than 42 years of experience in planning, design, design-build, project implementation, compliance, and program and construction management of large infrastructure projects. He also has extensive experience in water quality, water and wastewater treatment, and water supply. 

Mr. Zaragoza worked for some of the largest engineering and construction management firms in the world, which include Parsons Corporation and Black & Veatch Corporation, and has managed projects over $700 million. Additionally, he was the Project Director for all Program and Construction Management projects in the Western portion of the United States, Latin America, Central America, Mexico, and Asia. 

Mr. Zaragoza is a managing principle of Zw3 Inc. with extensive experience in project development, project financing, and project and construction oversight. He has earned him a number of awards including:

  • T.B. Robinson Outstanding Management Award (Black & Veatch, 1994)
  • A charter membership on the Parsons Corporation Executive Committee of Leadership.

Richard J. Zaragoza, P.E. 
(AZ, CO)
Principal, Project Management/ Construction Services 
Bill Weinstock has over 44 years of in-depth experience in design, master planning, and project/construction management of large water and wastewater infrastructure projects. Of those 44 years, 21 of them were with Parsons Corporation serving as Senior Project and Construction Manager on several water projects worldwide, employing his extensive expertise in large diameter water pipelines, pumping stations, metering vaults, storage/reservoirs, earth-fill dams, intake structures; as well as in boring and jacking; tunneling and micro-tunneling facilities and other large water and wastewater infrastructure projects.    

Some of the many projects in which Weinstock served: 
  • Project Engineer and Construction Manager for the City of Corona wastewater treatment plant improvements and recycled water project “A”  
  • Project and Construction Engineer for preliminary engineering, shop drawing reviews and quantity estimating for the City of Bakersfield WWTP #3 Expansion
  • Project and Construction Engineer for civil site work for Yucaipa and Tulare WWTP expansion
  • Final Design of the Workman Mozart 36-inch and 42-inch interceptor sewer, which included extensive tunneling and deep trenching in the urban streets of Los Angeles for the City of Los Angeles Bureau of Engineering
  • Design and Construction Services for two 11-ft-diameter tunnels totaling 3,100 feet and 4,200-feet of 63-inch diameter high-density polyethylene (HDPE) pipeline placed at lake bottom for City of Los Angeles Department of Water and Power (LADWP), Lower Stone Canyon Bypass Line No. 2   
  • Design and Construction Services for the Irvine Ranch Water District’s Newport Coast Drive wastewater collection and force main improvements  
  • Sewer Rehabilitation for the City of Los Angeles, designed various alternative methods of rehabilitating and relining an aging elliptical brick sewer

Mr. Bentwood is an AAEE Board Certified Environmental Engineer with 48 years of experience as an engineer and project manager in the design and construction of water facilities projects. He has extensive experience in the design and construction of prestressed concrete, cast-in-place concrete, and earthen storage reservoirs, conventional water treatment facilities, transmission pipelines, deep well water pumping systems, and booster pumping facilities. 

Mr. Bentwood’s provisioned technical review and participation on numerous value engineering teams, including the 600 MGD River Mountain Treatment Plant, 185 MGD Freeport Intake Pumping and Pipelines, the Goleta Water District Corona, Del Mar Water Treatment Plant Expansion, and the 20-mile long Contra Costa County Water District, Multipurpose Pipeline. A sample of projects in which Mr. Bentwood was involved:

Project Manager for design of the 25 MGD Robert B. Diemer Washwater Reclamation Plant for MWD of Southern California
Value Engineering Team Member for the City of Las Vegas Wastewater Treatment Plant Expansion from 66 MGD to 91 MGD, which included a new Biological Nutrient Removal (BNR) system.
Project Manager for the LACSD Whittier Narrows Water Reclamation Plant Conversion from Gas to Liquid Chemicals for Disinfection and Dechlorination.
Project Manager for design and construction administration services for the City of Atascadero Water Reclamation facilities, which included a remote influent pump station, force main, and reclamation treatment facilities.​

Meet the Zw3 Inc. Leadership/Governance Team
Zw3 Inc. has assembled an experienced team, each with more than 42 years' experience in helping communities meet their power and water quality needs and demands.

Richard Bentwood, P.E., BCEE
Treatment Facilities, Pump Stations, Pipelines, and Reservoirs
William J. Weinstock, P.E.
Principle of Engineering Services 
We understand that many communities have needs that far outpace the budget required to work with one of the water service behemoths. We have therefore made this our mission: Deliver an unparalleled level experience and service to support the water/wastewater and power needs of communities and municipalities at a reasonable cost. 
With more than 32 years' experience, Jeff Stone was the Chief of the Recycled Water Unit for the State of California, Department of Health Services, Division of Drinking Water (retired 12/31/2009). He carried out the legislative intent of promoting and expanding the statewide use of recycled water while ensuring that adequate measures are employed to protect public health. He was responsible for:
Jeff Stone
Technical Expert – California Recycled Water Reuse/Regulations
  • Developing Water Recycling Criteria and State Regulations which reflect the legislative intent to promote recycled water use and, provide necessary levels of public health protection and reasonably meet industry needs, interfacing with industry groups such as the American Water Works Association, Water Reuse Foundation and the Water Environment Federation
  • Working with Federal, State and Local Agencies to ensure program elements are consistent with other programs.
  • Developing guidelines and providing interpretation of regulations for staff and industry.
  • Reviewing new and emerging technologies applicable to the use of recycled water.
  • Providing recommendations to the Regional Water Quality Control Boards for purposes of permitting individual recycled water projects.
  • Providing technical and field support to the field operations branch.