Tetra Tech Bas Inc
Tetra Tech Bas Inc is an active, licensed contractor operating in Diamond Bar, CA. Operating under a California contractor license established in 1989. They hold 3 license classifications including A General Engineering Contractor, C-57 Well Drilling Contractor, and 1 others. They currently maintain an active contractor bond and workers' compensation insurance. No disciplinary actions have been recorded against this license.
License Information
- License Number
- 572017
- Status
- Active
- Classification(s)
- A: General Engineering Contractor, C-57: Well Drilling Contractor, HAZ: Hazardous Substance Removal Certification
- Tenure
- Licensed since 1989 (36 years)
- Issue Date
- June 28, 1989
- Expiration Date
- June 30, 2027
- Disciplinary Record
- No Disciplinary Actions
Bond & Insurance
- Contractor Bond
- Bonded ($25000) – FIDELITY AND DEPOSIT COMPANY OF MARYLAND
- Workers’ Compensation
- Workers' Compensation Insurance – SAFETY NATIONAL CASUALTY CORPORATION
A contractor’s bond protects consumers up to the bond amount if the contractor fails to fulfill contractual obligations or violates CSLB regulations.
Workers’ compensation insurance protects homeowners from liability if a contractor’s employee is injured on the job site.
Location
- Address
- 21700 COPLEY DR
- City
- Diamond Bar, CA
- ZIP Code
- 91765
- Phone
- (909) 860-7777
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About These License Types
A: General Engineering Contractor
Authorizes construction of fixed works requiring specialized engineering knowledge and skill, including irrigation, drainage, water power, water supply, flood control, inland waterways, harbors, docks, shipyards, dams, hydroelectric projects, levees, railroads, highways, tunnels, airports, sewers, bridges, pipelines, parks, refineries, and power plants.
Not authorized: Does not authorize work under a Class B General Building Contractor license or any specialty (C) classification unless incidental to the engineering project.
C-57: Well Drilling Contractor
Installs and repairs water wells and pumps by boring, drilling, excavating, casing, cementing, and cleaning to provide a supply of uncontaminated water.
HAZ: Hazardous Substance Removal Certification
An add-on certification for removal of hazardous substances. Only issued to contractors holding A, B, C-12, C-21, C-36, C-57, or C-61/D-40 licenses.
Not authorized: Restricted to contractors holding qualifying base licenses.
Licensing Resources
Workers' comp requirements for California contractors
Deposit and payment rules for California contracts
Home improvement contract requirements
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License data sourced from the California Contractors State License Board. Last data update: April 05, 2026.