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Excellence in underground engineering since 1970. Specialties: storm drains, water, sewer, fire protection, natural gas, excavations and more.

Explore Company

Premium underground electrical systems that keep communities running. Specialties: public utilities, telecom, joint trenching, security and more.

Explore Company

Excellence in underground engineering since 1970. Specialties: storm drains, water, sewer, fire protection, natural gas, excavations and more.

Explore Company

Quality. Integrity. Service.

The Preston Companies bring extensive expertise and hands-on partnership to complex projects. Our services include excavating and installing underground wet and dry utilities, soils testing and management, and fill site management.

About Preston

Environmental

Responsibly Understood And Practiced

With 20+ years of experience allowing extensive knowledge of environmental regulations and characterizations at a remediation, land fill or future development site.  We also tap into a broad network of soil industry partners to find the most cost-effective opportunities for clean soil and legal export results.

Our San Mateo Wastewater Treatment Plant expansion project included exporting clean soil of approximately 50,000 CY generated from the construction. The proposed facility included an administration building, a laboratory facility, and a headworks facility and involved an excavation depth of 11ft over 3 acres. During the initial review, DirtMarket found multiple areas of contamination without a clear clean-soil boundary. We prepared a site specific sampling plan to further delineate the contaminated soil from the potential clean soil and provided a cost effective export solution at a local clean fill site. Through additional sampling with our Direct Push Drill sampling crew, the contaminated soil was minimized and exported to an appropriate landfill site, while the clean soil was documented, approved, and off-hauled to a more cost effective clean fill site.

How Can We Help?

We take the time to learn about your specific needs and pain points to develop solutions that will have the greatest impact. Select a role below and see how Preston can support your needs!

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Whether you have an inquiry about our services, pricing, needing engineering expertise, or anything else, our team is ready to answer all of your questions.

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How We Help You

We take the time to learn about your specific needs and pain points to develop solutions that will have the greatest impact. Select a role below and see how Preston can support your needs!

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