Archives

Unocal Services Station

MONITORING WELLS INSTALLATION

Cornerstone installed monitoring wells and converted the wells into a free product extraction system under the direction of the Regional Water Quality Control Board and approved by the State Underground Leaking Tank Cleanup Fund and the City of Long Beach.

Long Beach, CA


Pt. Mugu Naval Base

CONSTRUCTION STORM WATER BMP INSTALLATION

Cornerstone engineered and constructed storm water and spill control for remediation of a test pit at the Pt. Mugu Naval base.

The project involved security clearance, engineering Best Management Practices (BMP) for construction project and installing and maintaining the BMPs throughout the completion of the project.

Port Hueneme, CA


Montebello Transit

GROUNDWATER & SOIL INVESTIGATION UNDERGROUND STORAGE TANK RELEASE

Cornerstone was retained by the City of Montebello to prepare a workplan for soil and groundwater investigation in compliance with the requirements of the Regional Water Quality Control Board (RWQCB). Cornerstone received approval from the Board and completed the installation of the soil borings and groundwater monitoring wells.

Cornerstone prepared a final report based on the “Risk Based Corrective Action” (RBCA) to assess mitigation requirements within a risk-based structure. Cornerstone obtained a letter of “No Further Action” (NFA) for the site.

Montebello, CA


California State University

SEWER & WATER PIPELINE INSTALLATION

Cornerstone bid and won a sewer installation project with California State University at Los Angeles. The project involved meeting project specifications, working with the onsite construction manager and coordinating construction activities around an operating campus. The new sewer line serviced the new visitor’s center and administration building.

Los Angeles, CA


Long Beach Transit

RWQCB GROUND WATER INVESTIGATION & MONITORING WELL INSTALLATION

Cornerstone was retained by Long Beach Transit to investigate a dispenser release which impacted groundwater.

Cornerstone worked with the insurance carrier to complete the requirements of the Regional Water Quality Control Board.
The site is currently being monitored for closure review.

LONG BEACH TRANSIT
Long Beach, CA